MD59-0021SMB [TE]
PCS CDMA LNA / Downconverter 1.8-2.0 GHz; PCS CDMA LNA /下变频器， 1.8-2.0 GHz的
| 型号： | MD59-0021SMB |
| 厂家： | 
TE CONNECTIVITY |
| 描述： | PCS CDMA LNA / Downconverter 1.8-2.0 GHz |
| 文件： | 总5页 (文件大小：127K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MD59-0021
PCS CDMA LNA / Downconverter
1.8—2.0 GHz
TSSOP-16 Plastic Package1
Features
(.039)
(1)
•
•
•
•
•
•
•
•
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
.041/.031
1,05/,80
Pin 16
.177/.169
4,5/4,3
.252
6,4
Operates in US and Korean PCS Bands
Miniature TSSOP-16 Plastic Package
.118
3,0
Pin 1
.0256
0,65
Description
.201/.193
5,1/4,9
.118
3,0
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.
Exposed
Pad
1. Dimensions are: in / mm
Ordering Information
The MD59-0021 is ideally suited for CDMA handset
applications where wide dynamic range and low power
consumption are important receiver requirements.
Part Number
Package
MD59-0021TR
MD59-0021RTR
MD59-0021SMB
Forward Tape and Reel1
Reverse Tape and Reel1
Sample Board
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.
1. If specific reel size is required, consult factory for part number
assignment.
Electrical Specifications TA = 25°C, VDD = 3.0V, RF = 1.9 GHz, LO = 1.69 GHz
Parameter
Low Noise Amplifier
Gain
Test Conditions
Units
Min.
Typ.
Max.
Frequency = 1.9 GHz
dB
dB
14
1.8
2:1
+6
Noise Figure
VSWR In/Out
Input IP3
dBm
mA
IDD
13
Complete DownConverter1
Conversion Gain
Noise Figure
Input IP3
dB
dB
22.5
2.7
-12
50
25.4
RF = 1.9 GHz
LO = 1.69 GHz, LO Level = -10 dBm
dBm
dB
LO-to-RF Isolation
LO-to-IF Isolation
IDD
dB
24
IF = 210 MHz
mA
32
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
MD59-0021
Pin Configuration
Block Diagrams
PIN No.
PIN
Description
LO VDD
LO IN
RFA IN
RFA VDD
GND
1
2
3
4
LO VDD
LO In
GND
LO Amplifier Supply Voltage. RF bypassing required.
Local Oscillator Input (-10 to -7 dBm) (DC blocked)
DC and RF ground
GND
IF Out
IF Output and Downconverter - must be externally
matched to input impedance of IF Filter.
IF OUT
IF MATCH
GND
IF BYP
GND
5
IF Match Matching between I FA and Mixer - requires an inductor
to ground.
6
7
8
9
GND
LNA VDD
LNA In
DC and RF ground
1
LNA Stage 1 supply voltage. RF bypassing required.
RF Input to LNA. External matching required.
LNA VDD
2
LNA VDD
1
LNA OUT
LNA SRC1
LNA SRC Source of LNA output stage FET. RF bypassing
required. Off-chip resistor may be used to increase IP3.
LNA IN
10
11
12
13
LNA Out 50Ω==Output of LNA. (DC Blocked)
LNA VDD
GND
2
LNA Stage 2 supply voltage. RF bypassing required.
DC and RF ground.
IF BYP
IF Bypass of Mixer. Required DC block and RF/IF
ground.
14
15
16
GND
DC and RF ground
RFA VDD RFA supply voltage. RF bypassing required.
RFA In
50Ω==Input of RFA. (DC blocking required)
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
MD59-0021
Recommended PCB Configuration
External Circuitry Parts List
Ref. Designation
Value
Purpose
C6, C10, C11, C14
33 pF
RF Bypass
C2, C5, C7, C12, C13, C15-
C17
1000 pF RF / IF Bypass
C3
15 pF
10 pF
IF Matching
C1, C4
Bypass, IF Matching
C8
1.5 pF
LNA Input Matching
C9
L1
L2
L3
R1
100 pF
27 nH
72 nH
6.8 nH
Rbias
RF Bypass
IF Matching
IF Amplifier Input Matching
LNA Input Matching
Optional resistor to increase bias
current in LNA
U1
MD59-00021
LNA/Downconverter
Cross Section View
RF Traces +
Components
U2
J1
Saw
Filter
Filter TX signals and image
10 PIN DC Connector
RF
Ground
DC
Connect
DC
Routing
Customer
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 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 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 LO input port is internally matched to 50Ω. 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
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 50Ω input and output impedance.
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.
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.
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
Typical Performance Curves
MD59-0021
LNA/Downconverter (with 3dB Pad in place of Image Reject Filter)
Conversion Gain vs. Frequency
Conversion Gain vs. Frequency
VDD = 2.8V, 3.0V, 3.3V, LO = -10dBm
LO = -10 dBm, -5 dBm, VDD = 3.0V
25
24
23
22
21
20
19
18
25
24
23
22
21
20
19
18
3.3V
-5 dBm
2.8V
-10 dBm
3.0V
1.8 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
RF FREQUENCY (GHz)
2
Noise Figure vs. Frequency
Noise Figure vs. Frequency
LO = -10dBm, -5dBm, VDD = 3.0V
VDD = 2.8V, 3.0V, 3.3V, LO = -10dBm
3.6
3.4
3.2
3
3.6
3.4
3.2
3
2.8V
-10dBm
-5dBm
2.8
2.6
2.4
2.2
2
2.8
2.6
2.4
2.2
2
3.3V
3.0V
1.8
1.82 1.84 1.86 1.88
1.9
1.92 1.94 1.96 1.98
2
1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98
RF FREQUENCY (GHz)
2
RF FREQUENCY (GHz)
Input IP3 vs. Frequency
Input IP3 vs. Frequency
VDD = 2.8V, 3.0V, 3.3V, LO = -10dBm
LO = -10dBm, -5dBm, VDD = 3.0V
-9
-9
-9.5
-10
-9.5
-10
-10.5
-11
-10.5
-11
-5dBm
-11.5
-12
-11.5
-12
-10dBm
3.0V
2.8V
-12.5
-13
3.3V
-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
1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98
RF FREQUENCY (GHz)
2
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
IF Output Return Loss vs. Frequency
LO = -10dBm, VDD = 3.0V
10
5
10
5
0
0
-5
-5
-10
-15
-20
-25
-30
-35
-40
-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
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
1.85
1.9
IF FREQUENCY (GHz)
LO FREQUENCY (GHz)
Downconverter Input Return Loss vs.
Frequency LO = -10dBm, VDD = 3.0V
LNA Gain, Noise Figure vs. Frequency
VDD = 3.0V
10
5
0
16
14
12
10
8
-5
-10
-15
-20
-25
-30
-35
-40
Gain
6
NF
4
2
0
1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95
RF FREQUENCY (GHz)
2
2.05 2.1
1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98
RF FREQUENCY (GHz)
2
LNA Input Return Loss vs. Frequency
LNA Input IP3 vs. Frequency
VDD = 3.0V
VDD = 2.8V, 3.0V, 3.3V
11
10
5
0
10
9
3.3V
-5
-10
-15
-20
-25
-30
-35
-40
8
7
3.0V
2.8V
6
5
1.8 1.82 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98
RF FREQUENCY (GHz)
2
1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95
RF FREQUENCY (GHz)
2
2.05 2.1
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.
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