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MD59-0021
PCS CDMA LNA / Downconverter 1.8-- 1.8 -- 2.0 GHz
Features
* * * * * * * * High Integrated LNA and Downconverter Operates over 2.7 V to 5V Supply Voltage Low Noise Figure < 2.7 dB High Input Intercept Point -12 dBm Optional Control of LNA IP3 Low LO Drive Level -10 dBm Operates in US and Korean PCS Bands Miniature TSSOP-16 Plastic Package
TSSOP-16 Plastic Package1
(.039) (1) Pin 16 .041/.031 1,05/,80
.252 6,4
.177/.169 4,5/4,3
Pin 1 .0256 0,65 .201/.193 5,1/4,9 Exposed Pad
.118 3,0
Description
M/A-COM's MD59-0021 is a fully integrated downconverter IC with LNA, RF amplifier, downconverting mixer, IF amplifier and LO buffer amplifier in a miniature TSSOP-16 plastic package with exposed metal lead frame backside for improved high frequency grounding. The MD59-0021 is ideally suited for CDMA handset applications where wide dynamic range and low power consumption are important receiver requirements. The MD59-0021 is fabricated using a M/A-COM's 0.5 micron low noise E/D GaAs MESFET process. The process features full passivation for increased performance and reliability.
.118 3,0
1. Dimensions are: in / mm
Ordering Information
Part Number MD59-0021TR MD59-0021RTR MD59-0021SMB
1.
Package Forward Tape and Reel1 Reverse Tape and Reel1 Sample Board
If specific reel size is required, consult factory for part number assignment.
Electrical Specifications TA = 25C, VDD = 3.0V, RF = 1.9 GHz, LO = 1.69 GHz
Parameter Low Noise Amplifier Gain Noise Figure VSWR In/Out Input IP3 IDD Complete DownConverter Conversion Gain Noise Figure Input IP3 LO-to-RF Isolation LO-to-IF Isolation IDD IF = 210 MHz RF = 1.9 GHz LO = 1.69 GHz, LO Level = -10 dBm
1
Test Conditions
Units
Min.
Typ.
Max.
Frequency = 1.9 GHz
dB dB
14 1.8 2:1
dBm mA
+6 13
dB dB dBm dB dB mA
22.5 2.7 -12 50 24 32
25.4
1. Complete downconverter measurements taken with 3 dB pad between LNA output and RFA input.
Specifications subject to change without notice.
V 2.0
North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information.
PCS CDMA LNA / Downconverter, 1.8--2.0 GHz Pin Configuration
PIN No. PIN Description
LO V DD
MD59-0021 Block Diagrams
RFA IN
1 2 3 4
LO VDD LO In GND IF Out
LO Amplifier Supply Voltage. RF bypassing required. Local Oscillator Input (-10 to -7 dBm) (DC blocked) DC and RF ground
GND GND LO IN RFA V DD
IF Output and Downconverter - must be externally matched to input impedance of IF Filter.
IF OUT IF BYP
5
IF Match
Matching between I FA and Mixer - requires an inductor to ground.
IF MATCH GND
6 7 8 9
GND
DC and RF ground
GND LNA V DD 2
LNA VDD1 LNA Stage 1 supply voltage. RF bypassing required. LNA In RF Input to LNA. External matching required.
LNA SRC Source of LNA output stage FET. RF bypassing required. Off-chip resistor may be used to increase IP3. LNA Out 50==Output of LNA. (DC Blocked)
LNA V DD1
LNA OUT
10 11 12 13
LNA IN
LNA SRC1
LNA VDD2 LNA Stage 2 supply voltage. RF bypassing required. GND IF BYP DC and RF ground. IF Bypass of Mixer. Required DC block and RF/IF ground. DC and RF ground RFA supply voltage. RF bypassing required. 50==Input of RFA. (DC blocking required)
14 15 16
GND RFA VDD RFA In
Sample Board Schematic
1
J1
1. Saw filter characteristics to be determined by customer, depending on band of operation. Sample boards are supplied with 3 dB pi pad installed in place of saw filter, to emulate typical worst case loss. Data supplied with sample board is measured over US PCS1900 Rx Band.
Specifications subject to change without notice.
V 2.0
North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information.
PCS CDMA LNA / Downconverter, 1.8--2.0 GHz External Circuitry Parts List
Ref. Designation
C6, C10, C11, C14 C2, C5, C7, C12, C13, C15C17 C3 C1, C4 C8 C9 L1 L2 L3 R1 U1
MD59-0021 Recommended PCB Configuration
Value
33 pF 1000 pF 15 pF 10 pF 1.5 pF 100 pF 27 nH 72 nH 6.8 nH Rbias RF Bypass
Purpose
RF / IF Bypass IF Matching Bypass, IF Matching LNA Input Matching RF Bypass IF Matching IF Amplifier Input Matching LNA Input Matching Optional resistor to increase bias current in LNA MD59-00021 LNA/Downconverter
Cross Section View
RF Traces + Components RF Ground DC Routing
U2 J1
Saw Filter DC Connect
Filter TX signals and image 10 PIN DC Connector
Operating Instructions
The MD59-0021 is a highly integrated MMIC downconverter for the 1.8-2 GHz PCS band. The downconverter provides exceptional RF performance while consuming low DC current and is packaged in a low cost plastic package. It is ideal for light weight battery operated portable radio systems. The receive chain consists of an LNA, RFA, balanced mixer and single-ended IF output buffer amplifier as shown in the block diagram. Surface mount resistors, inductors and capacitors are used in conjunction with the IC for optimum performance, tunability and ease of use. A schematic showing the IC and required external components is shown on the previous page. The input of the LNA is matched externally with a series inductor (L3) and a shunt capacitor (C8) to provide a low loss match to the optimum noise impedance in the band of interest. A high Q inductor such as Coilcraft's 0603CS series must be used if the specified noise figures are to be achieved. The series capacitor C9 is a DC blocking capacitor whose value is not critical (it should be 100pF) The LNA is nominally biased with 13 mA to give an input IP3 of +6 dBm. An external resistor R1, may be used to increase the LNA bias current and thus increase the IP3. An external image reject filter is required between the LNA output and RFA input to prevent downconversion of noise at the image frequency to the IF. This filter should have a 50 input and output impedance. The mixer is a balanced resistive FET mixer which provides exceptional linearity and isolation with low loss and no DC current. An off-chip inductor, L, is required to match the output of the mixer to the input of the IF buffer amplifier.
Customer
The IF output port is the open drain of the IF buffer amplifier. This allows maximum flexibility of intermediate frequency and also IF filter characteristics. A matching network such as that shown on page 2 can be used to match from the output impedance of the buffer to the input impedance of the filter at the required frequency. The inductor also acts as a choke for the DC supply line. The LO input port is internally matched to 50. An LO buffer amplifier amplifies the -10 dBm input signal to the level required to drive the mixer. Performance is optimum with a drive level of -5 dBm All DC supply lines must be properly bypassed at RF frequencies to obtain optimum performance and at lower frequency to maintain unconditional stability. Capacitors C1, C6, C11 and C14 are RF bypass capacitors for the LNA, RFA and LOA. The value and placement of these capacitors are critical in determining the frequency response of these amplifiers. Capacitor C10 is a source bypass capacitor for the second stage of the low noise amplifier. The placement of this capacitor will affect the gain of the LNA. For best performance, all the RF bypass capacitors should be placed as shown in the PCB drawing shown above. Capacitors C2, C5, C7, C12, C13 and C15 are 1000 pF low frequency DC supply bypass capacitors. Their value and placement are less critical than the other capacitors. However, for best results, these capacitors should be located as close to the package leads as possible.
Specifications subject to change without notice.
V 2.0
North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information.
PCS CDMA LNA / Downconverter, 1.8--2.0 GHz
MD59-0021
Typical Performance Curves LNA/Downconverter (with 3dB Pad in place of Image Reject Filter)
Conversion Gain vs. Frequency VDD = 2.8V, 3.0V, 3.3V, LO = -10dBm
25 24 23 GAIN (dB) 22 21 20 19 18 1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98 2 RF FREQUENCY (GHz)
2.8V 3.0V 3.3V
Conversion Gain vs. Frequency LO = -10 dBm, -5 dBm, VDD = 3.0V
25 24 GAIN (dB) 23 22 21 20 19 18 1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98 2 RF FREQUENCY (GHz)
-10 dBm -5 dBm
Noise Figure vs. Frequency VDD = 2.8V, 3.0V, 3.3V, LO = -10dBm
3.6 3.4 3.2 3 2.8 2.6 2.4 2.2 2 1.8
3.6 NOISE FIGURE (dB) 3.4 3.2 3 2.8 2.6 2.4 2.2 2
Noise Figure vs. Frequency LO = -10dBm, -5dBm, VDD = 3.0V
NOISE FIGURE (dB)
2.8V
-10dBm
3.0V
3.3V
-5dBm
1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98 RF FREQUENCY (GHz)
2
1.8
1.82
1.84
1.86
1.88
1.9
1.92
1.94
1.96
1.98
2
RF FREQUENCY (GHz)
Input IP3 vs. Frequency VDD = 2.8V, 3.0V, 3.3V, LO = -10dBm
-9 -9.5 -10 IIP3 (dBm) -10.5 -11 -12 -12.5 -13 1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98 RF FREQUENCY (GHz) 2
2.8V 3.0V 3.3V
Input IP3 vs. Frequency LO = -10dBm, -5dBm, VDD = 3.0V
-9 -9.5 -10 IIP3 (dBm) -10.5 -11 -11.5 -12 -12.5 -13 1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 RF FREQUENCY (GHz) 1.98 2
-10dBm -5dBm
-11.5
Specifications subject to change without notice.
V 2.0
North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information.
PCS CDMA LNA / Downconverter, 1.8--2.0 GHz
MD59-0021
Typical Performance Curves LNA/Downconverter (with 3dB Pad in place of Image Reject Filter) Cont'd)
LO Input Return Loss vs. Frequency LO = -10dBm, VDD = 3.0V
10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 LO FREQUENCY (GHz)
IF Output Return Loss vs. Frequency LO = -10dBm, VDD = 3.0V
10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 0.1 0.12 0.14 0.16 0.18 0.2 0.22 0.24 0.26 0.28 0.3 IF FREQUENCY (GHz) RETURN LOSS (dB)
RETURN LOSS (dB)
Downconverter Input Return Loss vs. Frequency LO = -10dBm, VDD = 3.0V
10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 RF FREQUENCY (GHz) 2 2.05 2.1
16 14 GAIN / NF (dB) 12 10 8 6 4 2 0 1.8
LNA Gain, Noise Figure vs. Frequency VDD = 3.0V
RETURN LOSS (dB)
Gain
NF
1.82
1.84
1.86
1.88
1.9
1.92
1.94
1.96
1.98
2
RF FREQUENCY (GHz)
LNA Input IP3 vs. Frequency VDD = 2.8V, 3.0V, 3.3V
11
3.3V
LNA Input Return Loss vs. Frequency VDD = 3.0V
10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2 2.05 2.1 RF FREQUENCY (GHz) RETURN LOSS (dB)
10 IIP3 (dBm) 9 8 7 6 5 1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98 2 RF FREQUENCY (GHz)
3.0V 2.8V
LNA Output Return Loss vs. Frequency VDD = 3.0V
10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2 2.05 2.1 RF FREQUENCY (GHz)
Specifications subject to change without notice.
V 2.0
North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information.
RETURN LOSS (dB)

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