cx74037 Conexant Systems, Inc., cx74037 Datasheet

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cx74037

Manufacturer Part Number
cx74037
Description
Transmit Rf Ic For Tdma Or Amps Applications
Manufacturer
Conexant Systems, Inc.
Datasheet
CX74037
Transmit RF IC for TDMA or AMPS Applications
Conexant’s CX74037 Transmit RF Application-Specific Integrated Circuit (ASIC) is
a triple-mode, dual-band transmitter intended for use in IS-136 compliant cellular
phones. As a dual mode IC, it can be used in Time Division Multiple Access
(TDMA) mode or Advanced Mobile Phone System (AMPS) mode. The device is
available in a 48-pin 7x7 Land Grid Array (LGA) package with downset paddle.
The CX74037 RF IC device includes the following functional components:
The CX74037 48-pin, 7x7 LGA package pin configuration is shown in Figure 1. A
CX74037 block diagram is shown in Figure 2.
Data Sheet
In-Phase and Quadrature (I/Q) modulator
Two Intermediate Frequency (IF) Voltage Controlled Oscillator (VCO) inputs
IF Variable Gain Amplifier (VGA)
Two upconverters
Two drivers for external Power Amplifiers (PAs).
R F _ C E L L _ O U T
V C C _ L D _ P C S
R F _ P C S _ O U T
V G A _ O U T +
V G A _ O U T -
P O T _ C E L L
V C C _ B I A S
D R V _ E N A
V G A _ G C
MIX_IN+
MIX_IN-
V C C _ I F
B A N D
Figure 1. CX74037 48-Pin, 7x7 LGA Package Pin Configuration
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
4 8
1 4
4 7
1 5
4 6
1 6
Conexant Proprietary
Data Subject to Change
4 5
1 7
4 4
1 8
4 3
1 9
4 2
2 0
4 1
2 1
4 0
2 2
3 9
2 3
3 8
2 4
2 9
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 8
2 7
2 6
2 5
Features
Applications
101103A-1_080400
Sectional enable lines for independent control of
circuits within the chip
90 dB IF VGA range
Separate IF frequencies can be used for the 800
MHz (AMPS) and 1900 MHz Bands (PCS)
Dual drivers for 800 MHz and 1900 MHz
PA driver is deactivated by using the Driver Enable
signal when there is no transmission
Available in a 48-pin, 7x7 LGA package with
downset paddle
Cellular and/or PCS-band phones
TDMA and/or AMPS-mode phones
Portable battery powered equipment
N C
I F _ V C O _ I N 1 -
I F _ V C O _ I N 1 +
N C
N C
N C
V C C _ D I V
M I X _ C E L L _ O U T
P U L L _ E N A
V C C _ D I F F _ D R V
M I X _ P C S _ O U T
N C
N C
September 27, 2000
Doc. No. 101103A

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cx74037 Summary of contents

Page 1

... Two Intermediate Frequency (IF) Voltage Controlled Oscillator (VCO) inputs IF Variable Gain Amplifier (VGA) Two upconverters Two drivers for external Power Amplifiers (PAs). The CX74037 48-pin, 7x7 LGA package pin configuration is shown in Figure 1. A CX74037 block diagram is shown in Figure 2. MIX_IN+ MIX_IN ...

Page 2

... Cell RF SAW Technical Description The CX74037 is a TDMA transmitter for the 800 MHz and 1900 MHz bands. It also can be used transmitter in AMPS mode at the 800 MHz band. A band select command chooses between the 800 MHz band and the 1900 MHz band. A mode select command chooses between TDMA and AMPS mode ...

Page 3

... Input pin for the modulator LO signal. The frequency is 2xIF. Can be used single-ended. AC ground the unused pin. 42 IF_SELECT Control signal to select IF VCO INPUT1 or INPUT2. “1” will select IF VCO INPUT1 and “0” will select IF VCO INPUT2. 101103A September 27, 2000 Table 1. CX74037 Signal Definition ( Description Conexant – Proprietary Data Subject to Change 3 ...

Page 4

... Supply current in 800 MHz AMPS @ 7 dBm Supply current in 800 MHz (DRV_ENA off) Supply current in 1900 MHz TDMA @ 8.0 dBm Supply current in 1900 MHz TDMA (DRV_ENA off) Supply current in sleep mode 4 Table 1. CX74037 Signal Definition ( Description Table 2. Absolute Maximum Ratings Symbol Minimum VCC – ...

Page 5

... Gain degradation @ VCC 2.7 V ACPR in 30 kHz at 30 kHz offset @ –5 dBm output; cascaded ACPR in 30 kHz at 60 kHz offset @ –5 dBm output; cascaded 101103A September 27, 2000 Table 4. CX74037 Electrical Characteristics ( VCC = 3 PLO = –10 dBm, input externally matched A Symbol ...

Page 6

Parameter Output P1dB Noise figure @ 8 dB gain leakage @ maximum gain –10 dBm Operating temperature range LO frequency range LO input return loss (reference Output frequency Conversion gain ACPR in ...

Page 7

Parameter Input return loss (reference Output frequency Gain Output power level @ 16 dB gain Output P1dB ACPR in 30 kHz band at 30 kHz offset @ 8.0 dBm output; cascaded ACPR in 30 kHz band at ...

Page 8

... Pin 1 7.00 – 0.10 Top View 1.20 – 0.10 0.30 – 0.05 Side View Figure 3. CX74037 Package Dimensions for a 48-Pin, 7x7 LGA Package 8 3.450 0.300 – 0.05 0.355 – 0.05 Bottom View Mold Substrate Conexant – Proprietary Data Subject to Change Pin 1 indication Solder Mask Exposed Metal 3.450 0.500 ...

Page 9

... Ordering Information Transmit RF IC 101103A September 27, 2000 Model Name Manufacturing Part CX74037 Conexant – Proprietary Data Subject to Change Number 9 ...

Page 10

... Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. ("Conexant") products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice ...

Page 11

... Phone: (800) 854-8099 (North Fax: America) (949) 483-6996 (International) Europe – Israel/Greece Phone: Printed in USA Fax: World Headquarters Conexant Systems, Inc. Europe South – France Phone: 4311 Jamboree Road Fax: Newport Beach, CA 92660-3007 Europe Mediterranean – Italy Phone: (949) 483-4600 Phone: ...

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