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ML3371 ML3372
Low Power Narrowband FM IF
Legacy Device: Motorola MC3371, MC3372
The ML3371 and ML3372 perform single conversion FM reception and consist of an oscillator, mixer, limiting IF amplifier, quadrature discriminator, active filter, squelch switch, and meter drive circuitry. These devices are designed for use in FM dual conversion communication equipment. The ML3371/ML3372 are similar to the Motorola MC3361/MC3357 FM IFs, except that a signal strength indicator replaces the scan function controlling driver which is in the MC3361/MC3357. The ML3371 is designed for the use of parallel LC components, while the ML3372 is designed for use with either a 455 kHz ceramic discriminator, or parallel LC components. These devices also require fewer external parts than earlier products. The ML3371 and ML3372 are available in dual-in-line and surface mount packaging. * Wide Operating Supply Voltage Range: VCC = 2.0 to 9.0 V * Input Limiting Voltage Sensitivity of -3.0 dB * Low Drain Current: ICC = 3.2 mA, @ VCC = 4.0 V, Squelch Off * Minimal Drain Current Increase When Squelched * Signal Strength Indicator: 60 dB Dynamic Range * Mixer Operating Frequency Up to 100 MHz * Fewer External Parts Required than Earlier Devices * Operating Temperature Range TA = -30 to +70C
MAXIMUM RATINGS
Rating Power Supply Voltage RF Input Voltage (VCC Detector Input Voltage Squelch Input Voltage (VCC 4.0 Vdc) Mute Function Mute Sink Current Junction Temperature Storage Temperature Range 4.0 Vdc) Pin 4 16 8 12 14 14 - - Symbol VCC(max) V16 V8 V12 V14 l14 TJ Tstg Value 10 1.0 1.0 6.0 -0.7 to 10 50 150 -65 to +150 Unit Vdc Vrms Vpp Vdc Vpk mA C C
16 1
P DIP 16 = EP PLASTIC PACKAGE CASE 648
16 1
SO 16 = -5P PLASTIC PACKAGE CASE 751B (SO-16) CROSS REFERENCE/ORDERING INFORMATION MOTOROLA PACKAGE LANSDALE P DIP 16 MC3371P ML3371EP SO 16 MC3371D ML3371-5P P DIP 16 MC3372P ML3372EP SO 16 MC3372D ML3372-5P
Note: Lansdale lead free (Pb) product, as it becomes available, will be identified by a part number prefix change from ML to MLE.
NOTES: 1. Devices should not be operated at these values. The "Recommended Operating Conditions" table provides conditions for actual device operation.
PIN CONNECTIONS
1 2 16 Mixer Input 15 Gnd 14 Mute ML3371 (Top View) 13 Meter Drive 12 Squelch Input 11 Filter Output 10 Filter Input 9 Recovered Audio Crystal Osc 1 2 16 Mixer Input 15 Gnd 14 Mute ML3372 (Top View) 13 Meter Drive 12 Squelch Input 11 Filter Output 10 Filter Input 9 Recovered Audio
Crystal Osc
Mixer Output 3 VCC 4 Limiter Input 5 Decoupling 6 7
Mixer Output 3 VCC 4 Limiter Input 5 Decoupling 6 Limiter Output 7 Quad Input 8
Quad Coil 8
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
RECOMMENDED OPERATING CONDITIONS
Rating Supply Voltage (@ TA = 25C) ( -30C TA +75C) RF Input Voltage RF Input Frequency Oscillator Input Voltage Intermediate Frequency Limiter Amp Input Voltage Filter Amp Input Voltage Squelch Input Voltage Mute Sink Current Ambient Temperature Range Pin 4 16 16 1 - 5 10 12 14 - Symbol VCC Vrf frf Vlocal fif Vif Vfa Vsq lsq TA Value 2.0 to 9.0 2.4 to 9.0 0.0005 to 10 0.1 to 100 80 to 400 455 0 to 400 0.1 to 300 0 or 2 0.1 to 30 -30 to +70 Unit Vdc mVrms MHz mVrms kHz mVrms mVrms Vdc mA C
AC ELECTRICAL CHARACTERISTICS (VCC = 4.0 Vdc, fo = 58.1125 MHz, df = 3.0 kHz, fmod = 1.0 kHz, 50 source,
flocal = 57.6575 MHz, Vlocal = 0 dBm, TA = 25C, unless otherwise noted) Characteristic Input for 12 dB SINAD Matched Input - (See Figures 11, 12 and 13) Unmatched Input - (See Figures 1 and 2) Input for 20 dB NQS Recovered Audio Output Voltage Vrf = -30 dBm Recovered Audio Drop Voltage Loss Vrf = -30 dBm, VCC = 4.0 V to 2.0 V Meter Drive Output Voltage (No Modulation) Vrf = -100 dBm Vrf = -70 dBm Vrf = -40 dBm Filter Amp Gain Rs = 600 , fs = 10 kHz, Vfa = 1.0 mVrms Mixer Conversion Gain Vrf = -40 dBm, RL = 1.8 k Signal to Noise Ratio Vrf = -30 dBm Total Harmonic Distortion Vrf = -30 dBm, BW = 400 Hz to 30 kHz Detector Output Impedance Detector Output Voltage (No Modulation) Vrf = -30 dBm Meter Drive Vrf = -100 to -40 dBm Meter Drive Dynamic Range RFIn IFIn (455 kHz) Mixer Third Order Input Intercept Point f1 = 58.125 MHz f2 = 58.1375 MHz Mixer Input Resistance Mixer Input Capacitance Pin - Symbol VSIN - - - - - 13 VNQS AFO 120 AFloss -8.0 MDrv MV1 MV2 MV3 AV(Amp) 47 - - - 9 9 13 13 AV(Mix) 14 s/n 36 THD - ZO DVO - MO - MVD - - - ITOMix - 16 16 Rin Cin - - -22 3.3 2.2 - - - k pF 60 80 - - dBm 0.8 - dB 1.45 - A/dB - 0.6 450 3.4 - Vdc 67 - % 20 - dB 50 - dB - 1.1 2.0 -1.5 0.3 1.5 2.5 - Vdc 0.5 1.9 3.1 dB 200 320 dB - 1.0 5.0 3.5 - 15 - Vrms mVrms Min Typ Max Unit Vrms
-
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
DC ELECTRICAL CHARACTERISTICS (VCC = 4.0 Vdc, TA = 25C, unless otherwise noted)
Characteristic Drain Current (No Input Signal) Squelch Off, Vsq = 2.0 Vdc Squelch On, Vsq = 0 Vdc Squelch Off, VCC = 2.0 to 9.0 V Detector Output (No Input Signal) DC Voltage, V8 = VCC Filter Output (No Input Signal) DC Voltage Voltage Change, VCC = 2.0 to 9.0 V Trigger Hysteresis Pin 4 lcc1 lcc2 dlcc1 9 11 V11 dV11 - Hys 1.5 2.0 34 2.5 5.0 57 3.5 8.0 80 mV V9 0.9 1.6 2.3 Vdc - - - 3.2 3.6 1.0 4.2 4.8 2.0 Vdc Symbol Min Typ Max Unit mA
Figure 1. ML3371 Functional Block Diagram and Test Fixture Schematic
RF Input
RSSI Output
VCC = 4.0 Vdc 51 k C1 0.01 51 1.0 F Mute 510 k 0.1 SqIn FilterOut
FilterIn 1.0 F
470 0.01 8.2 k 10 9 AF Amp
AF Out to Audio Power Amp
16
15
14
13
12
11 Filter - Amp +
Squelch Trigger with Hysteresis
Demodulator Mixer 10 Limiter Amp 51 k Oscillator 1 15 Quad Coil TOKO 2A6597 HK (10 mm) or 7MC-8128Z (7 mm) 2 3 4 5 1.8 k 6 7 8 53 k
57.6575 MHz
22
0.1 0.33 0.001 muRata CFU455D2 or equivalent
0.1 20 k
0.1
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
Figure 2. ML3372 Functional Block Diagram and Test Fixture Schematic
RF Input
RSSI Output
VCC = 4.0 Vdc 0.1 SqIn FilterOut
FilterIn 51 k C1 0.01 51 1.0 F Mute 510 k 470 0.01 8.2 k 10 Filter - Amp + 9 AF Amp AF Out to Audio Power Amp 1.0 F
16
15
14
13
12
11
Squelch Trigger with Hysteresis
Demodulator Mixer 10 Limiter Amp 53 k Oscillator 1 15 2 3 4 5 R10 1.8 k 0.33 0.001 muRata CFU455D2 or equivalent C15 0.1 6 C13 0.1 R11 51 k 7 C14 27 8
57.6575 MHz
22
C12 0.1
R12 4.3 k
Ceramic Resonator muRata CDB455C16
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LANSDALE Semiconductor, Inc.
TYPICAL CURVES
(Unmatched Input)
Figure 3. Total Harmonic Distortion versus Temperature
THD, TOTAL HARMONIC DISTORTION (%) 5.0 4.0 3.0 2.0 1.0 10 0 -55 -35 -15 5.0 25 45 85 65 TA, AMBIENT TEMPERATURE (C) 105 125 VCC = 4.0 Vdc RF Input = -30 dBm fo = 10.7 MHz RSSI OUT ( A) 70 60 50 40 30 20
Figure 4. RSSI versus RF Input
TA = 75C
TA = -30C TA = 25C
VCC = 4.0 Vdc fo = 10.7 MHz TA = 75C -100 TA = -30C -80 -60 -40 -20 0 20
0 -140 -120
RF INPUT (dBm)
Figure 5. RSSI Output versus Temperature
60 54 48 RSSI OUTPUT ( A) 42 36 30 24 18 12 6.0 0 -55 -35 -60 -110 dBm -15 25 45 65 5.0 85 TA, AMBIENT TEMPERATURE (C) 105 125 -70 - 70 -70 dBm VCC = 4.0 Vdc fo = 10.7 MHz -30 dBm MIXER OUTPUT (dBm) 0 -10 -20 -30 -40 -50
Figure 6. Mixer Output versus RF Input
100 MHz Desired Products
100 MHz 3rd Order Products
VCC = 4.0 Vdc TA = 27C - 60 - 50 - 40 - 30 - 20 - 10 0 10
RF INPUT (dBm)
Figure 7. Mixer Gain versus Supply Voltage
30 27 24 RSSI OUTPUT ( A) TA = -30C TA = 25C 18 15 12 9.0 6.0 3.0 0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10 0 1.0 fo = 10.7 MHz RFin -40 dBm 1.8 k Load MIXER GAIN (dB) 21 30 40 TA = 75C
Figure 8. Mixer Gain versus Frequency
VCC = 4.0 Vdc TA = 27C RFin = -40 dBm
20
-10 dBm -15 dBm
10
-20 dBm
5.0 dBm 0 dBm -5.0 dBm
10
100
1000
VCC, SUPPLY VOLTAGE (V)
f, FREQUENCY (MHz)
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LANSDALE Semiconductor, Inc.
ML3371 PIN FUNCTION DESCRIPTION OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 V, fmod = 1.0 kHz, fdev = 3.0 kHz. ML3371 at f RF = 10.7 MHz (see Figure 11).
Pin 1 Symbol OSC1 Internal Equivalent Circuit Description The base of the Colpitts oscillator. Use a high impedance and low capacitance probe or a "sniffer" to view the wave- form without altering the frequency. Typical level is 450 mVpp. VCC Waveform
1 OSC1 2 OSC2 2 OSC2
15 k The emitter of the Colpitts oscillator. Typical signal level is 200 mVpp. Note that the signal is somewhat distorted compared to that on Pin 1.
200 A
3
MXOut VCC 4 3 MixerOut
Output of the Mixer. Riding on the 455 kHz is the RF carrier component. The typical level is approximately 60 mVpp.
1.5 15k 4 VCC 100 A Supply Voltage -2.0 to 9.0 Vdc is the operating range. VCC is decoupled to ground.
5
IFIn 5 IFIn 6 DEC1 7 51 k 60 A 1.8 k 53 k
Input to the IF amplifier after passing through the 455 kHz ceramic filter. The signal is attenuated by the filter. The typical level is approximately 50 mVpp.
6 7
DEC1 DEC2
DEC2
IF Decoupling. External 0.1 F capacitors connected to VCC.
8
Quad Coil
8 Quad Coil VCC
Quadrature Tuning Coil. Composite (not yet demodulated) 455 kHz IF signal is present. The typical level is 500 mVpp.
10 50 A
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ML3371 PIN FUNCTION DESCRIPTION (continued) OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 V, fmod = 1.0 kHz, fdev = 3.0 kHz. ML3371 at f RF = 10.7 MHz (see Figure 11).
Pin 13 Symbol RSSI Internal Equivalent Circuit VCC 1.8 k Description RSSI Output. Referred to as the Received Signal Strength Indicator or RSSI. The chip sources up to 60 A over the linear 60 dB range. This pin may be used many ways, such as: AGC, meter drive and carrier triggered squelch circuit. RSSIOut 14 MUTE 14 Mute or SqOut Mute Output. See discussion in application text. Waveform
Bias
13
40 k 15 Gnd Gnd 15 Ground. The ground area should be continuous and unbroken. In a two- sided layout, the component side has the ground plane. In a one-sided layout, the ground plane fills around the traces on the circuit side of the board and is not interrupted. Mixer Input - Series Input Impedance: @ 10 MHz: 309 - j33 @ 45 MHz: 200 - j13
16
MIXIn 16 MixerIn 3.3 k
VCC
10 k
*Other pins are the same as pins in MC3371.
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
ML3372 PIN FUNCTION DESCRIPTION OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 V, fmod = 1.0 kHz, fdev = 3.0 kHz. ML3372 at f RF = 45 MHz (see Figure 13).
Pin 5 Symbol IFIn 5 IFIn 6 6 DEC1 DEC 60 A 53 k IF Decoupling. External 0.1 F capacitors connected to VCC. Internal Equivalent Circuit Description IF Amplifier Input Waveform
7
IFOut VCC 7 IFOut
IF Amplifier Output Signal level is typically 300 mVpp.
50 A 120 A
8
QuadIn 8 QuadIn VCC
Quadrature Detector Input. Signal level is typically 150 mVpp.
10
50 A
9
RA
Recovered Audio. This is a composite FM demodulated output having signal and carrier components. Typical level is 800 mVpp.
VCC
200
9
RAOut The filtered recovered audio has the carrier signal removed and is typically 500 mVpp.
100 A
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LANSDALE Semiconductor, Inc.
Figure 9. ML3371 Circuit Schematic
4 VCC MixerIn 16 MixerOut 3 Meter Out 13 FilterIn 10 12 Squelch In 1 OSC1 2 OSC2 200 A X X Y 100 A Bias 11 FilterOut Bias 15 Gnd 8 - + 14
Squelch Out
4 VCC
QuadIn
10 5 IFIn DEC1 DEC2 1.8 k 6 7 53 k 51 k
X YX Y
200
9
RAOut
100 A
Figure 10. ML3372 Circuit Schematic
4 VCC MixerIn 16 MixerOut 3 Meter Out 13 FilterIn 10 12 Squelch In 1 OSC1 2 OSC2 200 A X X Y 100 A Bias 11 FilterOut Bias 15 Gnd 8 QuadIn - + 14
Squelch Out
4 VCC
10 5 IFIn 6 DEC IFOut 7 53 k
X YX Y
200
9 RAOut
100 A
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
CIRCUIT DESCRIPTION The ML3371 and ML3372 are low power narrowband FM receivers with an operating frequency of up to 60 MHz. Its low voltage design provides low power drain, excellent sensitivity, and good image rejection in narrowband voice and data link applications. This part combines a mixer, an IF (intermediate frequency) limiter with a logarithmic response signal strength indicator, a quadrature detector, an active filter and a squelch trigger circuit. In a typical application, the mixer amplifier converts an RF input signal to a 455 kHz IF signal. Passing through an external bandpass filter, the IF signal is fed into a limiting amplifier and detection circuit where the audio signal is recovered. A conventional quadrature detector is used. The absence of an input signal is indicated by the presence of noise above the desired audio frequencies. This "noise band" is monitored by an active filter and a detector. A squelch switch is used to mute the audio when noise or a tone is present. The input signal level is monitored by a meter drive circuit which detects the amount of IF signal in the limiting amplifier. LEGACY APPLICATIONS INFORMATION The oscillator is an internally biased Colpitts type with the collector, base, and emitter connections at Pins 4, 1 and 2 respectively. This oscillator can be run under crystal control. For fundamental mode crystals use crystal characterized parallel resonant for 32 pF load. For higher frequencies, use 3rd overtone series mode type crystals. The coil (L2) and resistor RD (R13) are needed to ensure proper and stable operation at the LO frequency (see Figure 13, 45 MHz application circuit). The mixer is doubly balanced to reduce spurious radiation. Conversion gain stated in the AC Electrical Characteristic stable is typically 20 dB. This power gain measurement was made under stable conditions using a 50 source at the input and an external load provided by a 455 kHz ceramic filter at the mixer output which is connected to the VCC (Pin 4) and IF input (Pin 5). The filter impedance closely matches the1.8 k internal load resistance at Pin 3 (mixer output). Since the input impedance at Pin 16 is strongly influenced by a 3.3 k internal biasing resistor and has a low capacitance, the useful gain is actually much higher than shown by the standard power gain measurement. The Smith Chart plot in Figure 17 shows the measured mixer input impedance versus input frequency with the mixer input matched to a 50 source impedance at the given frequencies. In order to assure stable operation under matched conditions, it is necessary to provide a shunt resistor to ground. Figures 11, 12 and 13 show the input networks used to derive the mixer input impedance data. Following the mixer, a ceramic bandpass filter is recommended for IF filtering (i.e. 455 kHz types having a bandwidth of 2.0 kHz to 15 kHz with an input and output impedance from 1.5 k to 2.0 k). The 6 stage limiting IF amplifier has approximately 92 dB of gain. The MC3371 and MC3372 are
different in the limiter and quadrature detector circuits. The MC3371 has a 1.8 k and a 51 k resistor providing internal dc biasing and the output of the limiter is internally connected, both directly and through a 10 pF capacitor to the quadrature detector; whereas, in the MC3372 these components are not provided internally. Thus, in the MC3371, no external components are necessary to match the 455 kHz ceramic filter, while in the MC3372, external 1.8 k and 51 k biasing resistors are needed between Pins 5 and 7, respectively (see Figures 12 and 13). In the MC3371, a parallel LCR quadrature tank circuit is connected externally from Pin 8 to VCC (similar to the MC3361). In the MC3372, a quadrature capacitor is needed externally from Pin 7 to Pin 8 and a parallel LC or a ceramic discriminator with a damping resistor is also needed from Pin 8 to VCC (similar to the MC3357). The above external quadrature circuitry provides 90 phase shift at the IF center frequency and enables recovered audio. The damping resistor determines the peak separation of the detector and is somewhat critical. As the resistor is decreased, the separation and the bandwidth is increased but the recovered audio is decreased. Receiver sensitivity is dependent on the value of this resistor and the bandwidth ofthe 455 kHz ceramic filter. On the chip the composite recovered audio, consisting of carrier component and modulating signal, is passed through a low pass filter amplifier to reduce the carrier component and then is fed to Pin 9 which has an output impedance of 450. The signal still requires further filtering to eliminate the carrier component, deemphasis, volume control, and further amplification before driving a loudspeaker. The relative level of the composite recovered audio signal at Pin 9 should be considered for proper interaction with an audio post amplifier and a given load element. The MC13060 is recommended as a low power audio amplifier. The meter output indicates the strength of the IF level and the output current is proportional to the logarithm of the IF input signal amplitude. A maximum source current of 60 A is available and can be used to drive a meter and to detect a carrier presence. This is referred to as a Received Strength Signal Indicator (RSSI). The output at Pin 13 provides a current source. Thus, a resistor to ground yields a voltage proportional to the input carrier signal level. The value of this resistor is estimated by (VCC(Vdc) - 1.0 V)/60 A; so for VCC = 4.0 Vdc, the resistor is approximately 50 k and provides a maximum voltage swing of about 3.0 V. A simple inverting op amp has an output at Pin 11 and the inverting input at Pin 10. The noninverting input is connected to 2.5 V. The op amp may be used as a noise triggered squelch or as an active noise filter. The bandpass filter is designed with external impedance elements to discriminate between frequencies. With an external AM detector, the filtered audio signal is checked for a tone signal or for the presence of noise above the normal audio band. This information is applied to Pin 12.
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Legacy Applications Information
An external positive bias to Pin 12 sets up the squelch trigger circuit such that the audio mute (Pin 14) is open or connected to ground. If Pin 12 is pulled down to 0.9 V or below by the noise or tone detector, Pin 14 is internally shorted to ground. There is about 57 mV of hyteresis at Pin 12 to prevent jitter. Audio muting is accomplished by connecting Pin 14 to the appropriate point in the audio path between Pin 9 and an audio amplifier. The voltage at Pin 14 should not be lower than -0.7 V; this can be assured by connecting Pin 14 to the point that has no DC component.
Another possible application of the squelch switch may be as a carrier level triggered squelch circuit, similar to the MC3362/MC3363 FM receivers. In this case the meter output can be used directly to trigger the squelch switch when the RF input at the input frequency falls below the desired level. The level at which this occurs is determined by the resistor placed between the meter drive output (Pin 13) and ground (Pin 15). Figure 11b shows a typical application using the ML145170/ML145170 PLL device to obtain multiple channel operation.
Figure 11a. Typical Application for ML3371 at 10.7 MHz
V CC = 4.0 Vdc RSSI Output R2 10 k 1st IF 10.7 MHz from Input Front End C2 4.7 F L1 TKANS9443HM 6.8 H 6% R1 51 k C17 0.1 + R3 100 k R4 1.0 k 1N5817 R5 4.7 k R6 C3 0.1 C4 0.001 C5 0.001 R9 510 k 16 15 14 13 12 11 9 10 AF Filter - Amp Amp + Demodulator 10 53 k 8 T2: Toko 2A6597 HK (10 mm) or 7MC-8128Z (7 mm) 560 R7 4.7 k R8 3.3 k C7 0.022 VR2 10 k C8 0.22 AF Out to Audio Power Amp VR1 (Squelch Control) 10 k
+
C9 10
C15 91 8.2 H L2 R11 560
D1
C1 0.01
Squelch Trigger with Hysteresis Mixer Oscillator 2 C10 10.245 MHz 68 C11 220 muRata CFU455D2 or equivalent C12 0.1
Limiter Amp 51 k
1
3
4
5 1.8 k 6
7
C13 0.1
R10 39 k C14 0.1
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Figure 11b. Typical Application using PLL ML145170 Device Allowing Multiple Channel Operation.
V2 5V +V R5 100k D1 1N914 C23 C21 1uF .1uF C14 R13 .001uF 4.7k R14 510k .001uF C22 R11 4.7k
R SSI
R15 1k
C 11 .1uF C1 15pF C2 1nF
R4 10k 40% C12 .22uF
Squelch
51k R3
R12 3.3kk C13
P1 L1 1uH C3 47pF ML3371
P16 mixin P15 gnd P14 mute P13 rssi P12 sqin P11 filout P10 filin P9 recaudio
Volume
R2
.022uF
10k 40%
U1
xtal P1 xtal P2 mixout vcc P3 P4 limin P5 decP6 decP7 quadP8
L3 1uH
C10 1nF
C4 33pF 33pF C5 C20 .1uF R8 10k
1uH L2 R1 20k
C8
C7
C6 150pF V1 10V +V C9 .1uF
D2 MV209
10k R10
.1uF .1uF U2 cerfil
V3 5V C15 +V .1uF
R9 3.3k
R7 2.7k C19 .1uF
455 Khz ceramic filter
MC145170
C18 1nF
P16 Vdd phsV P15 phsR P14 P13 PDout P12 Vss P11 LD P10 Fv P9 Fr
U3 oscinP1 oscout P2 REFoutP3 FinP4 DinP5 enbP6 clk P7 Dout P8
SPI
J2
XTAL2 1.000MHZ
1Meg R6 C17 27pF
C16 27pF
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
Legacy Applications Information
Figure 12. Typical Application for ML3372 at 10.7 MHz
VCC = 4.0 Vdc RSSI Output R2 10 k 1st IF 10.7 MHz from Input Front End C2 4.7 F L1 TKANS9443HM 6.8 H 6% R1 51 k C6 0.1 + R4 1.0 k 1N5817 R5 4.7 k R6 C3 0.1 C4 0.001 C5 0.001 R9 16 15 14 13 12 510 k 10 11 - Filter Amp + 9 AF Amp VR2 10 k 560 R7 4.7 k R8 3.3 k C7 0.022 C8 0.22 AF Out to Audio Power Amp VR1 (Squelch Control) 10 k
+
C9 10
C16 91 8.2 H L2 R13 560
D1
C1 0.01
Squelch Trigger with Hysteresis Mixer Oscillator 2 C10 10.245 MHz 68 C2 220 muRata CFU455D2 or equivalent
Demodulator Limiter Amp 4 5 R10 1.8k C12 0.1 6 7 C13 0.1 R11 51 k 10 53 k 8 C14 27p R12 4.3 k C15 0.1 muRata CDB455C16
1
3
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LANSDALE Semiconductor, Inc.
Legacy Applications Information
Figure 13. Typical Application for ML3372 at 45 MHz
VCC = 4.0 Vdc RSSI Output to Meter (Triplett - 100 kV) R2 12 k R3 100 k C2 4.7 L1 0.245 H Coilcraft 150-07J08 R14 51 k C1 0.01 16 R1 470 C6 0.1 + R4 1.0 k 1N5817 R5 4.7 k R6 C3 0.1 C4 0.001 C5 0.001 R9 14 13 12 510 k 11 10 9 - AF Filter Amp Amp + Demodulator 10 Limiter Amp 53 k 5 R10 1.8 k 6 7 C13 0.1 R11 51 k C14 27 R12 4.3 k muRata CDB455C16 8 VR2 10 k 560 R7 4.7 k VR1 (Squelch Control) 10 k
+
C9 10
RF Input 45 MHz C17 120 C18 75
D1
R8 3.3 k C7 0.022 C8 0.22 AF Out to Audio Power Amp
15
Squelch Trigger with Hysteresis Mixer Oscillator 2 C10 C16 0.01 Coilcraft 143-13J12 44.545 MHz 30 L2 0.84 H R13 1.0 k muRata CFU455D2 or equivalent C11 5.0
1
3
4
C12 0.1
C15 0.1
Figure 14. RSSI Output versus RF Input
3.5 3.0 RSSI OUTPUT (Vdc) RSSI OUTPUT (Vdc) 2.5 2.0 1.5 1.0 0.5 0 -120 -100 -80 -60 -40 -20 fRF = 10.7 MHz VCC = 4.0 Vdc Reference Figure 11 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -120
Figure 15. RSSI Output versus RF Input
fRF = 45 MHz VCC = 4.0 Vdc Reference Figure 13
-100
-80 -60 RF INPUT (dBm)
-40
-20
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Legacy Applications Information
Figure 16. S + N, N, AMR versus Input
10 0 S + N, N, AMR (dB) -10 -20 -30 -40 -50 -60 -130 -110 -90 -70 RF INPUT (dBm) * Reference Figures 11, 12 and 13 S + N 30% AM fRF = 10.7 MHz VCC = 4.0 V TA = 25C S+N
N -50 -30 -10
Figure 17. Mixer Input Impedance versus Frequency
+j50
+j25
+j100
+j150 +j10 VCC = 4.0 Vdc RF Input = -40 dBm
+j250 +j500
0
10
25
50
100
150
250
500
45 MHz 10.7 MHz -j500
-j10
-j250
-j150
-j25 -j50
-j100
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ML3371, ML3372
LANSDALE Semiconductor, Inc.
Legacy Applications Information
Figure 18. MC3371 PC Board Component View with Matched Input at 10.7 MHz
COMPONENT SIDE CUT .325 VCC GND C9 J3 C14 AF OUT T2 R10 J2 BNC VR2 R8 CFU VCC 455D 2 C13 C12 + CUT .325 GND
C11 C10 XTAL 10.245 MHZ J1 C16 C15 INPUT IF 10.7 MHZ
MC3371 C1 L2 +
MC3371
IF 10.7 MHZ FRONT END
C2 C R9 C3 C8 R7 5 C7 C4 D1 R6 R5 VR1 R3 R2 J3 VCC
BNC
R11 L1 J4 CUT .325 R4 R1 C17
METER OUT
Figure 19. MC3371 PC Board Circuit or Solder Side as Viewed through Component Side
SOLDER SIDE
Above PC Board is laid out for the circuit in Figure 11.
Page 16 of 19
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Issue A
ML3371, ML3372
LANSDALE Semiconductor, Inc.
Legacy Applications Information
Figure 20. MC3372P PC Board Component View with Matched Input at 10.7 MHz
COMPONENT SIDE CUT .325 VCC VCC GND + CUT .325 GND
C9 R10 J3 C12
AF OUT
BNC
MC3372
IF 10.7 MHZ FRONT END
C11 CFU455D2 C INPUT IF C10 XTAL 1 CDB 10.7 MHZ 10.245 3 455 MHZ C16 J1 C17 C14 R12 J2 MC3372 C16 VR2 C1 R8 R9 BNC C2 L2 C + C3 C8 L1 5 R13 C7 R7 C4 J4 CUT D1 R6 .325 R5 R4 C6 R1 METER VR1 R3 OUT R2 C15 R 1 1 J3 VCC
Figure 21. MC3372P PC Board Circuit or Solder Side as Viewed through Component Side
SOLDER SIDE
Above PC Board is laid out for the circuit in Figure 12.
Page 17 of 19
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Issue A
ML3371, ML3372
LANSDALE Semiconductor, Inc.
OUTLINE DIMENSIONS
P DIP 16 = EP PLASTIC PACKAGE (ML3371EP, ML3372EP) CASE 648-08 ISSUE R -A-
16 9
B
1 8
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. DIM A B C D F G H J K L M S INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0 10 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0 10 0.51 1.01
F S
C
L
-T- H G D
16 PL
SEATING PLANE
K
J TA
M
M
0.25 (0.010)
M
-A-
SO 16 = -5P PLASTIC PACKAGE (ML3371-5P, ML3372-5P) CASE 751B-05 (SO-16) ISSUE J
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0 7 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0 7 0.229 0.244 0.010 0.019
16
9
-B-
1 8
P
8 PL
0.25 (0.010)
M
B
S
G F
K C -T-
SEATING PLANE
R
X 45
M D
16 PL M
J
0.25 (0.010)
TB
S
A
S
DIM A B C D F G J K M P R
Lansdale Semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Lansdale does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. "Typical" parameters which may be provided in Lansdale data sheets and/or specifications can vary in different applications, and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by the customer's technical experts. Lansdale Semiconductor is a registered trademark of Lansdale Semiconductor, Inc.
Page 19 of 19
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Issue A

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