TriQuint Semiconductor Inc TQ5131 Datasheet

WIRELESS COMMUNICATIONS DIVISION

TQ5131

CDMA

IF Out

RF

IN

GND

GIC

IF

Out

VDD

LO

IN

IF

Out

Mode Select/

LO Input

IFA Gain

Select

AMP's
IF Out

Product Description

The TQ5131 is a 3V, RFA/Mixer IC designed specifically for Cellular band
CDMA/AMPS applications. It’s RF performance meets the requirements of products
designed to the IS-95 and AMPS standards. The TQ5131 is designed to be used
with the TQ3131 (CDMA/AMPS LNA) which provides a complete CDMA receiver for
800MHz dual-mode phones.

DATA SHEET

3V Cellular Band
CDMA/AMPS RFA/Mixer
IC

Features

 Small size: SOT23-8
 Single 3V operation
 Low-current operation
 Gain Select
 Mode Select
 High IP3 performance
 Few external components

The RFA/Mixer incorporates on-chip switches which determine CDMA, AMPS and
bypass mode select. When used with the TQ3131 (CDMA/AMPS LNA), four gain
steps are available. The RF input port is internally matched to 50 Ω, greatly
simplifying the design and keeping the number of external components to a
minimum. The TQ5131 achieves good RF performance with low current
consumption, supporting long standby times in portable applications. Coupled with
the very small SOT23-8 package, the part is ideally suited for Cellular band mobile
phones.

Electrical Specifications

Parameter Min Typ Max Units
Frequency 881 MHz
Gain 15.0 dB
Noise Figure 4.5 dB
Input 3rd Order Intercept 2.5 dBm
DC supply Current 15.0 mA

Note 1: Test Conditions: Vdd=2.8V, RF=881MHz, LO=966MHz, IF=85MHz, Ta=25C, CDMA High Gain

state.

1

Applications

 IS-95 CDMA Mobile Phones
 AMPS Mobile Phones
 Dual Mode CDMA Cellular application

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TQ5131

Data Sheet

Electrical Characteristics

Parameter Conditions Min. Typ/Nom Max. Units
RF Frequency Cellular band 869 881 894 MHz
IF Frequency Range High side LO 85 130 MHz

CDMA Mode-Hi gh Gain

Gain 13.0 15.0 dB
Noise Figure 4.5 5.5 dB
Input IP3 0 2.5 dBm
Supply Current 15.0 18.0 mA

CDMA Mode-Hi gh Gain Low Linearity

Gain 14.0 17.0 dB
Noise Figure 4.5 5.5 dB
Input IP3 -1.0 dBm
Supply Current 15.0 mA

CDMA Mode-Mid Gain

Gain 1.0 3.5 dB
Noise Figure 11.0 dB
Input IP3 13.5 dBm
Supply Current 10.5 mA

CDMA Mode-Low Gain

Gain 5.0 7.0 dB
Noise Figure 10.0 dB
Input IP3 10.0 dBm
Supply Current 10.5 mA

AMPS Mode

Gain 9.5 12.0 dB
Noise Figure 5.0 6.0 dB
Input IP3 -5.0 -3.0 dBm
Supply Current 9.0 12.5 mA
Supply Voltage 2.8 V

Note 1: Test Conditions: Vdd=2.8V, RF=881MHz, LO=966MHz, IF=85MHz, TC = 25° C, Min/Max limits are at + 25°C case tem perature, unless otherwise specifi ed.

Absolute Maximum Ratings

Parameter Value Units
DC Power Supply 5.0 V
Power Dissipation 500 mW
Operating Temperature -40 to 85 C
Storage Temperature -60 to 150 C
Signal level on inputs/outputs +20 dBm
Voltage to any non supply pin +0.3 V

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Typical Performance, Note: HG Mode=CDMA High Gain, LG Mode=CDMA Low Gain

Test Conditions, unless otherwise specified: Vdd=2.8V, Ta=25C , RF=881MHz, LO=966MHz , IF=85MHz, LO input=-4dBm

Gain vs. Frequency
18
16
14
12
10

Gain (dB)

8
6
4

HG Mode
LG Mode
AMPS Mode

2

869 875 882 888 894

Frequency (MHz)

16
15
14
13
12
11

Idd (mA)

10

9
8
7
6

869 875 882 888 894

Idd vs. Frequency

TQ5131
Data Sheet

HG Mode
LG Mode
AMPS Mode

Frequency (MHz)

Input IP3 vs. Frequency

12
10

8
6

HG Mode
LG Mode
AMPS Mode

4
2

Input IP3 (dBm)

0

-2

-4
869 875 882 888 894

Frequency (MHz)

Noise Figure vs. Frequency

11
10

9
8
7

HG Mode
LG Mode
AMPS Mode

6
5

Noise Figure (dB)

4
3
2

869 875 882 888 894

Frequency (MHz)

Gain vs. Temperature

18
16
14
12
10

Gain (dB)

8

HG Mode
LG Mode
AMPS Mode

6
4

-30 0 25 55 85
Temperature (Celsius)

Input IP3 vs. Temperature

12

9

6

HG Mode
LG Mode
AMPS Mode

3

Input IP3 (dBm)

0

-3

-6

-30 0 25 55 85
Temperature (Celsius)

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TQ5131

Data Sheet

Noise Figure vs. Temperature

12
10

8
6

Noise Figure (dB)

4
2

HG Mode
LG Mode
AMPS Mode

0

-30 0 25 55 85
Temperature (Celsius)

Idd vs. Temperature

18
16
14
12
10

Idd (mA)

8
6

HG Mode
LG Mode
AMPS Mode

4

-30 0 25 55 85
Temperature (Celsius)

Input IP3 vs. LO Power

12
10

8
6
4

HG Mode
LG Mode
AMPS Mode

2
0

Input IP3 (dBm)

-2

-4

-6

-8 -6 -4 -2 0
LO Power (dBm)

Noise Figure vs. LO Power

11
10

9
8
7
6

HG Mode
LG Mode
AMPS Mode

5

Noise Figure (dB)

4
3
2

-8 -6 -4 -2 0

LO Power (dBm)

Gain vs. LO Power

18
16
14
12

18
16
14
12

10

10

Gain (dB)

8
6
4

HG Mode
LG Mode
AMPS Mode

2

-8 -6 -4 -2 0

Gain (dB)

8
6
4

2.6 2.8 3 3.2

LO Power (dBm)

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Gain vs. Vdd

HG Mode
LG Mode
AMPS Mode

Vdd (volts)

Input IP3 vs. Vdd

12
10

8
6
4
2

Input IP3 (dBm)

0

-2

-4

-6

2.62.833.2
Vdd (volts)

Noise Figure vs. Vdd
11
10

9
8
7
6
5

Noise Figure (dB)

4
3
2

2.62.833.2
Vdd (volts)

HG Mode
LG Mode
AMPS Mode

HG Mode
LG Mode
AMPS Mode

TQ5131
Data Sheet

Idd vs. Vdd

18
16
14
12

Idd (mA)

10

8
6
4

2.62.833.2
Vdd (volts)

HG Mode
LG Mode
AMPS Mode

For additional information and latest specifications, see our website: www.triquint.com 5