CMH82
Preliminary Datasheet
•
High-Linearity, Cellular LNA/Mixer IC for
use in TDMA and CDMA Mobile Phones
•
Integrated bypass switch for LNA
•
GaAs PHEMT Process
•
Leadless 3.5 x 3.5 mm. SMT package
•
LO Input power range: -12.0 to 0 dBm
•
Operating voltage range: 2.7 to 4 V
•
Total current consumption: 20 mA
•
Adjustable Mixer Gain and IP3
ESD:
Electrostatic discharge
sensitive device
Observe handling Precautions!
LO
LNA
IF
CDMA
AMPS
Type
Marking
Ordering code
(tape and reel)
Package
CMH82
H82
TBD
VQFN-20
Maximum Ratings
Supply Voltage
DC-Voltage at RF Ports
DC-Voltage at GND Ports
DC-Voltage at CNTL Ports
Power into LO Input
Operating Temperature
Channel Temperature
Storage Temperature
Thermal Resistance
Channel to Soldering Point (GND)
Symbol
min
VDD
VRF
VGND
VCNTL
Pin,LO
T
a
TCh
Tstg
-55
0
- 0.3
- 0.3
0
-40
Value
max
4
0.3
0.3
0.3 + VDD
10
85
150
150
Unit
V
V
V
V
dBm
°C
°C
°C
RthChS
102
°C /W
CMH82 - Preliminary Datasheet (Rev 3nl, 1/02)
1
CMH82
Electrical Characteristics
Parameter,
RF - Frequency
LO - Frequency
(1)
min
869
919
50
-12.0
2.7
2.4
0.0
typ
-
-
-
-
-
2.7
-
max
894
1194
300
0.0
4.0
0.3 + VDD
0.3
Unit
MHz
MHz
MHz
dBm
V
V
V
IF Frequency range
LO Power Input
Supply Voltage (Vdd)
High Logic Level (H)
Low Logic Level (L)
1) Low-side LO can be achieved using external tuning
LNA – Performance of LNA:
Test conditions:
T
a = 25°C,
V
DD= 2.7 V,
f
RF = 869 - 894 MHz
Mode – High Gain, High Linearity
min
Operating Current
Noise Figure
Gain
Input / Output return loss
3rd Order Input Intercept Point
Mode – High Gain, Reduced Current
Operating Current
Noise Figure
Gain
Input / Output return loss
3rd Order Input Intercept Point
Mode – Low Gain, By-Pass Mode
Operating Current
Noise Figure
Gain
Input / Output return loss
3rd Order Input Intercept Point
min
min
typ
6.5
1.1
12.5
10
10.0
typ
4.5
1.2
12.3
10
8.0
typ
0
4.5
-4.5
10
25
max
Unit
mA
dB
dB
dB
dBm
max
Unit
mA
dB
dB
dB
dBm
max
Unit
mA
dB
dB
dB
dBm
CMH82 - Preliminary Datasheet (Rev 3nl, 1/02)
2
CMH82
MIXER - Electrical Characteristics of Mixer section
Test conditions:
T
a = 25°C;
V
DD= 2.7V,
P
LO = -10 dBm,
f
LO
= f
RF
+ f
IF
, f
IF = 85MHz
Mode – High Gain, High Linearity CDMA
min
typ
max
Operating Current
Conversion Gain
(1)
Noise Figure
3rd Order Input Intercept Point
RF Input return loss
LO Input return loss
IF Output Impedance
(2)
Mode – Reduced Current CDMA
Operating Current
Conversion Gain
Noise Figure
3rd Order Input Intercept Point
RF Input return loss
LO Input return loss
IF Output Impedance
(2)
Mode – AMPS
Operating Current
Conversion Gain
Noise Figure
3rd Order Input Intercept Point
RF Input return loss
LO Input return loss
IF Output Impedance
(2)
min
(1)
Unit
mA
dB
dB
dBm
dB
dB
Ω
13.5
15.5
4.5
6.5
10
10
695+j*135
min
typ
11.0
15.2
4.7
4.5
10
10
695+j*135
typ
11
13.5
5.7
2.5
10
10
172+j*78
max
max
Unit
mA
dB
dB
dBm
dB
dB
Ω
Unit
mA
dB
dB
dBm
dB
dB
Ω
1) CDMA Mixer Gain may be varied from approximately 10 to 20 dB (typical) by choice of external
components. See notes.
2) IF Output externally tuned to desired impedance
CMH82 - Preliminary Datasheet (Rev 3nl, 1/02)
3
CMH82
FULL CHAIN – LNA / Downconverter Characteristics
Test conditions:
T
a = 25 °C,
V
DD= 2.7 V,
P
LO = -10 dBm,
f
IF = 85 MHz
Mode – High Gain, High Linearity CDMA
Total operating Current
Conversion Gain
Noise Figure
Input IP3
LNA Input IP3
Mode – High Gain, Reduced Current CDMA
Total operating Current
Conversion Gain
(1)
Noise Figure
Input IP3
LNA Input IP3
Mode – Low Gain (LNA bypass) CDMA
Total operating Current
Conversion Gain
Noise Figure
Input IP3
Mode – AMPS
(2)
(1)
(2)
(1)
min
typ
20
25
1.9
-3.5
10.0
max
Unit
mA
dB
dB
dBm
dBm
min
typ
15.5
24.5
2.0
-5
8.0
max
Unit
mA
dB
dB
dBm
dBm
min
typ
11.0
7.7
12.0
11.5
max
Unit
mA
dB
dB
dBm
min
typ
15.5
22.8
2.3
-6.5
max
Unit
mA
dB
dB
dBm
Total operating Current
Conversion Gain
(1)
Noise Figure
Input IP3
1) Assumes 3 dB loss for image filter
2) Assumes reduced current mode
CMH82 - Preliminary Datasheet (Rev 3nl, 1/02)
4
CMH82
Truth Table
Control Voltage
Operating Mode
High Gain & Linearity
High Gain, Low Current
Low Gain (LNA bypass)
AMPS
Mode Ctl
H
H
H
L
Gain Ctl
H
H
L
H
Rcv Only
H
L
L
L
PIN Assignments & Functional Block Diagram
CDMA
LNA
RFA
IFA
LOA
AMPS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Symbol
LO in
GND
LO Vdd
Mix out
AMPS in
CDMA in
GND
Ifa src
CDMA out
AMPS out
Mode
RFA in
RFA Vdd
Vdd
LNA Vdd
LNA out
GND
LNA in
Rcv
Gctl
Description
Mixer LO Input
Ground
Supply voltage for LO Buffer Amp
Mixer output to IF Amplifier
AMPS IF Amplifier input
CDMA IF Amplifier input
Ground
IF Amplifier FET source ground
CDMA IF output
AMPS IF output
AMPS or CDMA IF mode control
Downconverter input from image filter
Supply voltage for RFA
Supply voltage
Supply voltage for LNA
Output of LNA
Ground
RF Input to LNA
Reduced current mode control
Control voltage for LNA gain selection
CMH82 - Preliminary Datasheet (Rev 3nl, 1/02)
5
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