View LMH6639_988578.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LMH6639 190MHz Rail-to-Rail Output Amplifier with Disable
January 2002
LMH6639 190MHz Rail-to-Rail Output Amplifier with Disable
General Description
The LMH6639 is a voltage feedback operational amplifier with a rail-to-rail output drive capability of 110mA. Employing National's patented VIP10 process, the LMH6639 delivers a bandwidth of 190MHz at a current consumption of only 3.6mA. An input common mode voltage range extending to 0.2V below the V- and to within 1V of V+, makes the LMH6639 a true single supply op-amp. The output voltage range extends to within 30mV of either supply rail providing the user with a dynamic range that is especially desirable in low voltage applications. The LMH6639 offers a slew rate of 172V/s resulting in a full power bandwidth of approximately 28MHz. The TON value of 83nsec combined with a settling time of 33nsec makes this device ideally suited for multiplexing applications. Careful attention has been paid to ensure device stability under all operating voltages and modes. The result is a very well behaved frequency response characteristic for any gain setting including +1, and excellent specifications for driving video cables including harmonic distortion of 65.8dBc, differential gain of 0.065% and differential phase of 0.05
Features
(VS = 5V, Typical values unless specified) n Supply current (no load) 3.6mA n Supply current (off mode) 400A n Output resistance (closed loop 1MHz) 0.186 n -3dB BW (AV = 1) 190MHz n Settling time 33nsec n Input common mode voltage -0.2V to 4V n Output voltage swing 40mV from rails n Linear output current 110mA n Total harmonic distortion 65.8dBc n Fully characterized for 3V, 5V and 5V n No output phase reversal with CMVR exceeded n Excellent overdrive recovery n Off Isolation 1MHz -70dB n Differential Gain 0.065% n Differential Phase 0.05%
Applications
n n n n n Active filters CD/DVD ROM ADC buffer amplifier Portable video Current sense buffer
20030246
FIGURE 1. Typical Single Supply Schematic
(c) 2002 National Semiconductor Corporation
DS200302
www.national.com
LMH6639
Absolute Maximum Ratings
(Note 1)
Junction Temperature (Note 4) Soldering Information Infrared or Convection (20 sec) Wave Soldering (10 sec)
+150C 235C 260C
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance VIN Differential Input Current Supply Voltage (V - V ) Voltage at Input/Output pins Storage Temperature Range
+ -
2KV (Note 2) 200V (Note 9)
2.5V 10mA
12.6V V+ +0.8V, V- -0.8V -65C to +150C
Operating Ratings (Note 1)
Operating Temperature Range (Note 4) Package Thermal Resistance (JA) (Note 4) SOT23-6 SOIC-8 265C/W 190C/W -40C to +85C
3V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at TJ = 25C, V+ = 3V, V- = 0V, VO = VCM = V+/2, and RL = 2k to V+/2. Boldface limits apply at the temperature extremes. Symbol BW BW0.1dB FPBW GBW en in THD TS SR VOS TC VOS IB IOS RIN CIN CMVR -3dB BW 0.1dB Gain Flatness Full Power Bandwidth Gain Bandwidth product Input-Referred Voltage Noise Input-Referred Current Noise Total Harmonic Distortion Settling Time Slew Rate Input Offset Voltage Input Offset Average Drift Input Bias Current Input Offset Current Common Mode Input Resistance Common Mode Input Capacitance Input Common-Mode Voltage Range AV = +1, f = 1kHz, RS = 1M AV = +1, RS = 100k CMRR 50dB 1.8 1.6 CMRR AVOL Common Mode Rejection Ratio Large Signal Voltage Gain (Note 12) VO = 2VPP, RL = 2k to V+/2 VO = 2VPP, RL = 150 to V+/2 72 80 76 74 70 (Note 11) (Note 7) Parameter AV = +1 AV = -1 RF = 2.65k , RL = 1k, AV = +1, VOUT = 2VPP, -1dB V+ = 1.8V, V- = 1.2V AV = +1 RF = 33k RF = 1m f = 10kHz f = 1MHz f = 10kHz f = 1MHz f = 5MHz, VO = 2VPP, AV = -1, RL = 100 to V+/2 VO = 2VPP, 0.1% AV = -1 (Note 8) 120 Conditions Min (Note 6) 120 Typ (Note 5) 170 63 16.4 21 83 16.1 6.71 1.30 0.36 50 37 167 1.01 8 -1.02 20 6.1 1.35 -0.3 2 93 100 78 dB -0.2 -0.1 -2.6 -3.5 800 1000 5 7 Max (Note 6) Units
MHz MHz MHz MHz nV/ pA/ dBc ns V/s mV V/C A nA M pF
V
dB
www.national.com
2
LMH6639
3V Electrical Characteristics
Symbol VO Parameter Output Swing High Output Swing Low ISC Output Short Circuit Current
(Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25C, V+ = 3V, V- = 0V, VO = VCM = V+/2, and RL = 2k to V+/2. Boldface limits apply at the temperature extremes. Conditions RL = 2k to V+/2, VID = 200mV RL = 150 to V /2, VID = 200mV RL = 50 to V+/2, VID = 200mV RL = 2k to V+/2, VID = -200mV RL = 150 to V /2, VID = -200mV RL = 50 to V+/2, VID = -200mV Sourcing to V+/2, (Note 10) Sinking to V+/2, (Note 10) 50 35 67 40 72
+ +
Min (Note 6) 2.90 2.75 2.6
Typ (Note 5) 2.98 2.93 2.85 25 75 130 120 140 99 96 3.5 0.3 V+-1.59
Max (Note 6)
Units
V 75 200 300 mV
mA
IOUT PSRR IS
Output Current Power Supply Rejection Ratio Supply Current (Enabled) Supply Current (Disabled)
VO = 0.5V from either supply (Note 12) No Load
mA dB 5.6 7.5 0.5 0.7
mA
TH_SD I_SD PIN TON TOFF ROUT
Threshold Voltage for Shutdown Mode Shutdown Pin Input Current On Time After Shutdown Off Time to Shutdown Output Resistance Closed Loop RF = 10k, f = 1kHz, AV = -1 RF = 10k, f = 1MHz, AV = -1 SD Pin Connect to 0V (Note 7)
V A nsec nsec m
-13 83 160 27 266
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at TJ = 25C, V+ = 5V, V- = 0V, VO = VCM = V+/2, and RL = 2k to V+/2. Boldface limits apply at the temperature extremes. Symbol BW BW0.1dB FPBW GBW en in THD DG DP TS SR VOS -3dB BW 0.1dB Gain Flatness Full Power Bandwidth Gain Bandwidth Product Input-Referred Voltage Noise Input-Referred Current Noise Total Harmonic Distortion Differential Gain Differential Phase Settling Time Slew Rate Input Offset Voltage Parameter AV = +1 AV = -1 RF = 2.51k, RL = 1k, AV = +1, VOUT = 2VPP, -1dB AV = +1 RF = 33k RF = 1M f = 10kHz f = 1MHz f = 10KHz f = 1MHz f = 5MHz, VO = 2VPP, AV = -1 RL = 100 to V+/2 NTSC, AV = +2 RL = 150 to V+/2 NTSC, AV = +2 RL = 150 to V+/2 VO = 2VPP, 0.1% AV = -1, (Note 8) 130 Conditions Min (Note 6) 130 Typ (Note 5) 190 64 16.4 28 86 16.17 6.63 1.35 0.35 65.8 0.065 0.05 33 172 1.02 5 7 Max (Note 6) Units
MHz MHz MHz MHz nV/ pA/ dBc % deg ns V/s mV
3
www.national.com
LMH6639
5V Electrical Characteristics
Symbol TC VOS IB IOS RIN CIN CMVR Parameter Input Offset Average Drift Input Bias Current Input Offset Current Common Mode Input Resistance Common Mode Input Capacitance Common-Mode Input Voltage Range
(Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25C, V+ = 5V, V- = 0V, VO = VCM = V+/2, and RL = 2k to V+/2. Boldface limits apply at the temperature extremes. Conditions (Note 11) (Note 7) Min (Note 6) Typ (Note 5) 8 -1.2 20 AV = +1, f = 1kHz, RS = 1M AV = +1, RS = 100k CMRR 50dB 6.88 1.32 -0.3 4 -0.2 -0.1 3.8 3.6 -2.6 -3.25 800 1000 Max (Note 6) Units V/C A nA M pF
V
CMRR AVOL
Common Mode Rejection Ratio Large Signal Voltage Gain
(Note 12) VO = 4VPP RL = 2k to V+/2 VO = 3.75VPP RL = 150 to V+/2
72 86 82 74 70 4.90 4.65 4.40
95 100 77 4.97 4.90 4.77 25 85 190 100 200 400
dB
dB
VO
Output Swing High Output Swing Low
RL = 2k to V+/2, VID = 200mV RL = 150 to V /2, VID = 200mV RL = 50 to V+/2, VID = 200mV RL = 2k to V+/2, VID = -200mV RL = 150 to V+/2, VID = -200mV RL = 50 to V /2, VID = -200mV
+ +
V
mV
ISC
Output Short Circuit Current
Sourcing to V+/2, (Note 10) Sinking from V+/2, (Note 10)
100 79 120 85 72
160 190 110 96 3.6 0.40 V+ -1.65 5.8 8.0 0.8 1.0 mA
IOUT PSRR IS
Output Current Power Supply Rejection Ratio Supply Current (Enabled) Supply Current (Disabled)
VO = 0.5V from either supply (Note 12) No Load
mA dB
mA
TH_SD I_SD PIN TON TOFF ROUT
Threshold Voltage for Shutdown Mode Shutdown Pin Input Current On Time after Shutdown Off Time to Shutdown Output Resistance Closed Loop RF = 10k, f = 1kHz, AV = -1 RF = 10k, f = 1MHz, AV = -1 SD Pin Connected to 0V (Note 7)
V A nsec nsec m
-30 83 160 29 253
www.national.com
4
LMH6639
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at TJ = 25C, VSUPPLY = 5V, V- = 0V, VO = VCM = GND, and RL = 2k to V+/2. Boldface limits apply at the temperature extremes. Symbol BW BW0.1dB FPBW GBW en in THD DG DP TS SR VOS TC VOS IB IOS RIN CIN CMVR -3dB BW 0.1dB Gain Flatness Full Power Bandwidth Gain Bandwidth Product Input-Referred Voltage Noise Input-Referred Current Noise Total Harmonic Distortion Differential Gain Differential Phase Settling Time Slew Rate Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Current Common Mode Input Resistance Common Mode Input Capacitance Common Mode Input Voltage Range AV +1, f = 1kHz, RS = 1M AV = +1, RS = 100k CMRR 50dB 3.8 3.6 CMRR AVOL Common Mode Rejection Ratio Large Signal Voltage Gain (Note 12) VO = 9VPP, RL = 2k VO = 8VPP, RL = 150 VO Output Swing High Output Swing Low ISC Output Short Circuit Current RL = 2k, VID = 200mV RL = 150, VID = 200mV RL = 50, VID = 200mV RL = 2k, VID = -200mV RL = 150, VID = -200mV RL = 50, VID = -200mV Sourcing to Ground, (Note 10) Sinking to Ground, (Note 10) 100 80 110 85 72 88 84 74 70 4.85 4.55 3.60 (Note 11) (Note 7) Parameter AV = +1 AV = -1 RF = 2.26k, RL = 1k AV = +1, VOUT = 2VPP, -1dB AV = +1 RF = 33k RF = 1M f = 10kHz f = 1MHz f = 10kHz f = 1MHz f = 5MHz, VO = 2VPP, AV = -1, RL = 100 NTSC, AV = +2 RL = 150 NTSC, AV = +2 RL = 150 VO = 2VPP, 0.1% AV = -1 (Note 8) 140 Conditions Min (Note 6) 150 Typ (Note 5) 228 65 18 29 90 15.74 6.94 1.13 0.34 71.2 0.065 0.045 33 200 1.03 8 -1.40 20 7.5 1.28 -5.3 4.0 95 100 77 4.96 4.80 4.55 -4.97 -4.85 -4.65 168 190 mA -4.90 -4.55 -4.30 V V dB -5.2 -5.1 -2.6 -3.25 800 1000 5 7 Max (Note 6) Units
MHz MHz MHz MHz nV/ pA/ dBc % deg ns V/s mV V/C A nA M pF
V
dB
5
www.national.com
LMH6639
5V Electrical Characteristics
Symbol IOUT PSRR IS Parameter Output Current Power Supply Rejection Ratio Supply Current (Enabled) Supply Current (Disabled) TH_SD I_SD PIN TON TOFF ROUT Threshold Voltage for Shutdown Mode Shutdown Pin Input Current On Time after Shutdown Off Time to Shutdown Output Resistance Closed Loop
(Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25C, VSUPPLY = 5V, V- = 0V, VO = VCM = GND, and RL = 2k to V+/2. Boldface limits apply at the temperature extremes. Conditions VO = 0.5V from either supply (Note 12) No Load 72 Min (Note 6) Typ (Note 5) 112 96 4.18 0.758 V+ - 1.67 SD Pin Connected to -5V (Note 7) -84 83 160 RF = 10k, f = 1kHz, AV = -1 RF = 10k, f = 1MHz, AV = -1 32 226 6.5 8.5 1.0 1.3 Max (Note 6) Units mA dB
mA
V A nsec nsec m
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Note 2: Human body model, 1.5k in series with 100pF. Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150C. Note 4: The maximum power dissipation is a function of TJ(MAX), JA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/ JA . All numbers apply for packages soldered directly onto a PC board. Note 5: Typical values represent the most likely parametric norm. Note 6: All limits are guaranteed by testing or statistical analysis. Note 7: Positive current corresponds to current flowing into the device. Note 8: Slew rate is the average of the rising and falling slew rates. Note 9: Machine Model, 0 in series with 200pF. Note 10: Short circuit test is a momentary test. Note 11: Offset voltage average drift determined by dividing the change in VOS at temperature extremes into the total temperature change. Note 12: f 1kHz (see typical performance Characteristics)
Connection Diagrams
SOT23-6 SOIC-8
20030201
20030202
Top View
Top View
Ordering Information
Package 6-Pin SOT-23 8-Pin SOIC Part Number LMH6639MF LMH6639MFX LMH6639MA LMH6639MAX LMH6639MA Package Marking A81A Transport Media 1k Units Tape and Reel 3k Units Tape and Reel Rails 2.5k Units Tape and Reel M08A NSC Drawing MF06A
www.national.com
6
LMH6639
Typical Performance Characteristics
RF = 1k for AV = -1. Unless otherwise specified. Output Sinking Saturation Voltage vs. IOUT for Various Temperature
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, Output Sourcing Saturation Voltage vs. IOUT for Various Temperature
20030239
20030237
Positive Output Saturation Voltage vs. VSUPPLY for Various Temperature
Negative Output Saturation Voltage vs. VSUPPLY for Various Temperature
20030233
20030234
VOUT from V+ vs. ISOURCE
VOUT from V- vs. ISINK
20030238
20030236
7
www.national.com
LMH6639
Typical Performance Characteristics
IOS vs. VS for Various Temperature
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, RF = 1k for AV = -1. Unless otherwise specified. (Continued) VOS vs. VS for 3 Representative Units
20030232
20030245
VOS vs. VS for 3 Representative Units
VOS vs. VS for 3 Representative Units
20030244
20030243
VOS vs. VS for 3 Representative Units
ISUPPLY vs. VCM for Various Temperature
20030242
20030240
www.national.com
8
LMH6639
Typical Performance Characteristics
ISUPPLY vs. VS for Various Temperature
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, RF = 1k for AV = -1. Unless otherwise specified. (Continued) IB vs. VS for Various Temperature
20030241
20030235
Bandwidth for Various VS
Bandwidth for Various VS
20030206
20030205
Gain vs. Frequency Normalized
Gain vs. Frequency Normalized
20030207
20030208
9
www.national.com
LMH6639
Typical Performance Characteristics
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, RF = 1k for AV = -1. Unless otherwise specified. (Continued) Gain and phase vs. Frequency for Various Temperature
0.1dB Gain Flatness
20030209
20030204
Frequency Response vs. Temperature
On-Off Switching DC Voltage
20030211
20030210
On-Off Switching 10MHz
Slew Rate (Positive)
20030212
20030214
www.national.com
10
LMH6639
Typical Performance Characteristics
Slew Rate (Negative)
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, RF = 1k for AV = -1. Unless otherwise specified. (Continued) On-Off Switching of Sinewave
20030213
20030215
Power Sweep
CMRR vs. Frequency
20030216
20030218
PSRR vs. Frequency
Current Noise
20030217
20030220
11
www.national.com
LMH6639
Typical Performance Characteristics
Voltage Noise
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, RF = 1k for AV = -1. Unless otherwise specified. (Continued) Closed Loop Output Resistance vs. Frequency
20030219
20030221
Off Isolation
Small Signal Pulse Response (AV = +1)
20030250 20030222
Small Signal Pulse Response (AV = -1)
Large Signal Pulse Response
20030249
20030226
www.national.com
12
LMH6639
Typical Performance Characteristics
Large Signal Pulse Response
At TJ = 25C, V+ = +2.5, V- = -2.5V, RF = 330 for AV = +2, RF = 1k for AV = -1. Unless otherwise specified. (Continued) Large Signal Pulse Response
20030227
20030228
13
www.national.com
LMH6639
Application Notes
Multiplexing 5 and 10MHz The LMH6639 may be used to implement a circuit which multiplexes two signals of different frequencies. Three LMH6639 high speed op-amps are used in the circuit of Figure 2 to accomplish the multiplexing function. Two LMH6639 are used to provide gain for the input signals, and the third device is used to provide output gain for the selected signal. 1k resistors are used to set an inverting gain of -1 for IC3 in the circuit of Figure 2. Figure 3 illustrates the waveforms produced. The upper trace shows the switching waveform used to switch between the 5MHz and 10MHz multiplex signals. The lower trace shows the output waveform consisting of 5MHz and 10MHz signals corresponding to the high or low state of the switching signal. In the circuit of Figure 2, the outputs of IC1 and IC2 are tied together such that their input impedances are placed in parallel at the input of IC3. The output impedance of the disabled amplifier is high compared both to the output impedance of the active amplifier and the 330 gain setting resistors. The closed loop output resistance for the LMH6639 is around 0.2. Thus the active state amplifier output impedance dominates the input node to IC3, while the disabled amplifier is assured of a high level of suppression of unwanted signals which might be present at the output. Shutdown Operation With SD pin left floating, the device enters normal operation. However, since the SD pin has high input impedance, it is best tied to V+ for normal operation. This will avoid inadvertent shutdown due to capacitive pick-up from nearby nodes. LMH6639 will typically go into shutdown when SD pin is more than 1.7V below V+, regardless of operating supplies. PCB Layout Consideration and Components selection Care should be taken while placing components on a PCB. All standard rules should be followed especially the ones for high frequency and/ or high gain designs. Input and output pins should be separated to reduce cross-talk, especially under high gain conditions. A groundplane will be helpful to avoid oscillations. In addition, a ground plane can be used to create micro-strip transmission lines for matching purposes. Power supply, as well as shutdown pin de-coupling will reduce cross-talk and chances of oscillations. Another important parameter in working with high speed amplifiers is the component values selection. Choosing high value resistances reduces the cut-off frequency because of the influence of parasitic capacitances. On the other hand choosing the resistor values too low could 'load down' the nodes and will contribute to higher overall power dissipation. Keeping resistor values at several hundreds of ohms up to several k will offer good performance. National Semiconductor suggests the following evaluation boards as a guide for high frequency layout and as an aid in device testing and characterization: Device LMH6639MA LMH6639MF
20030248
20030247
Note: Pin numbers pertain to SOIC-8 package
FIGURE 2. Multiplexer Multiplexing signals "FREQ 1" and "FREQ 2" exhibit closed loop non-inverting gain of +2 each based upon identical 330 resistors in the gain setting positions of IC1 and IC2. The two multiplexing signals are combined at the input of IC3, which is the third LMH6639. This amplifier may be used as a unity gain buffer or may be used to set a particular gain for the circuit.
Package 8-Pin SOIC SOT23-6
Evaluation Board PN CLC730027 CLC730116
FIGURE 3. Switching between 5 and 10MHz
These free evaluation boards are shipped when a device sample request is placed with National Semiconductor. For normal operation, tie the SD pin to V+.
www.national.com
14
LMH6639
Physical Dimensions
inches (millimeters) unless otherwise noted
6-Pin SOT23 NS Package Number MF06A
8-Pin SOIC NS Package Number M08A
15
www.national.com
LMH6639 190MHz Rail-to-Rail Output Amplifier with Disable
Notes
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
National Semiconductor Corporation Americas Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: ap.support@nsc.com
National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507
www.national.com
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

▲Up To Search▲

Price & Availability of LMH6639

	To Download LMH6639 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .