View CX74037_490400.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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: * * * * * 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).
Features
* 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
Applications
* Cellular and/or PCS-band phones * TDMA and/or AMPS-mode phones * Portable battery powered equipment
The CX74037 48-pin, 7x7 LGA package pin configuration is shown in Figure 1. A CX74037 block diagram is shown in Figure 2.
IF_VCO_IN2+
IF_VCO_IN2-
LO_PCS_IN
IF_SELECT
VCC_MIX
LO_CELL
VGA_EN
MODE
NC
NC
MIX_IN+ MIX_INVCC_IF VGA_GC VGA_OUTVGA_OUT+ VCC_LD_PCS POT_CELL DRV_ENA RF_PCS_OUT VCC_BIAS RF_CELL_OUT BAND
1 2 3 4 5 6 7 8 9 10 11 12 13 VCC_DRV_CEL VCC_MID_PCS VCC_MOD DRV_PCS_IN POT_PCS I_DATA+ DRV_CELL_IN Q_DATA+ I_DATAQ_DATANC 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38
NC 37 36 35 34 33 32 31 30 29 28 27 26 25
NC IF_VCO_IN1IF_VCO_IN1+ NC NC NC VCC_DIV MIX_CELL_OUT PULL_ENA VCC_DIFF_DRV MIX_PCS_OUT NC NC
101103A-1_080400
Figure 1. CX74037 48-Pin, 7x7 LGA Package Pin Configuration
Data Sheet
Conexant Proprietary
Data Subject to Change
Doc. No. 101103A September 27, 2000
CX74037
Transmit RF IC for TDMA or AMPS Applications
PCS RF SAW PCS LO Cell LO IF LO IN
CX74037 PCS-TDMA RF Out TX RFIC
VCC I Data IF Select Band Select PULL En PA Driver En VGA En Q Data Interface
/2 Cell RF Out
2
2
Vvga 101103A-2_080900
Cell RF SAW
LPF or BPF
Figure 2. CX74037 Functional Block Diagram
Technical Description
The CX74037 is a TDMA transmitter for the 800 MHz and 1900 MHz bands. It also can be used as an FM 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. The chip consist of an I/Q modulator, IF LO input buffer, IF VGA, two upconverters for the 800 MHz and 1900 MHz bands, and two PA drivers for the 800 MHz and the 1900 MHz bands. I/Q Modulator. The I/Q modulator converts the incoming I/Q signal to an IF signal using one of the two local oscillator inputs. This signal is fed directly to the VGA amplifier. Variable Gain Amplifier. The VGA is a differential amplifier that receives its signal from the I/Q modulator, amplifies it, and then is taken off-chip to be filtered before routing it to the upconverter. A dynamic range of 90 dB is available on the amplifier. A DC voltage of 0.2 to 2.5 V is needed to control the gain of the amplifier. Upconverters. The 800 MHz and 1900 MHz upconverters receive the IF signal from the VGA amplifier. Each upconverter requires an external LO controlled by an external Phase Locked Loop (PLL). The band select command switches between the 800 MHz and the 1900 MHz bands. PA Drivers. Two PA drivers are included, the 800 MHz driver and the 1900 MHz driver. Each driver takes its input from the upconverter after passing through an image rejection filter. The driver amplifies the signal and sends it to an external PA. Electrical and Mechanical Specifications ________________ The signal pin assignments and functional pin descriptions are found in Table 1. The absolute maximum ratings of the CX74037 are provided in Table 2, the recommended operating conditions are specified in Table 3. Electrical characteristics for the CX74037 are shown in Table 4. Table 5 defines the control signal logic. Figure 3 provides the package dimensions for the 48-pin, 7x7 LGA package.
ESD Sensitivity
The CX74037 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions.
Data Sheet
Conexant Proprietary
Data Subject to Change
Doc. No. 101103A September 27, 2000
Transmit RF IC for TDMA or AMPS Applications
CX74037
Table 1. CX74037 Signal Definition (1 of 2) Pin NO.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
Name
Mix_IN+ Mix_INVCC_IF VGA_GC VGA_OUTVGA_OUT+ VCC_LD_PCS POT_CELL DRV_ENA RF_PCS_OUT VCC_BIAS RF_CELL_OUT BAND VCC_DRV_CEL POT_PCS VCC_MID_PCS DRV_CELL_IN DRV_PCS_IN I_DATA+ I_DATAVCC_MOD Q_DATA+ Q_DATANC NC NC MIX_PCS_OUT VCC_DIFF_DRV PULL_ENA MIX_CELL_OUT VCC_DIV NC NC NC IF VCO IN1+ IF VCO IN1NC NC MODE IF VCO IN2+ IF VCO IN2IF_SELECT
Description
Input to RF Upconverters. Internally AC coupled, high impedance. Input to RF Upconverters. Internally AC coupled, high impedance. Supply voltage for the AGC amplifier. The input pin for AGC gain control. A DC control voltage should be applied to this pin to vary the gain of the IF amplifier. VGA Output, open collector. External resistive (300 ohms) pull up to Vcc required. VGA Output, open collector. External resistive (300 ohms) pull up to Vcc required. Supply voltage for the PCS last stage driver amplifier. This pin is connected to an external resistor. The value of the resistor will vary the bias current of the cellular driver. This is the input pin for the upconverter and the driver control signal. When the pin is low the driver and the upconverter are deactivated. Output pin for the PCS driver amplifier. Impedance matching is required. Supply voltage of bias cells. Output pin for the cellular driver amplifier. Impedance matching is required. This is a control signal input pin. It selects between cellular band and PCS band. When the input is low, the cellular band is chosen. When the input is high, the PCS band is chosen. Supply voltage for the driver of the cellular band. This pin is connected to an external resistor. The value of the resistor will vary the bias current of the PCS driver. Supply voltage for the first amplifier in the PCS driver block. The Cellular driver amplifier input pin. Impedance matching is required. The PCS driver amplifier input pin. Impedance matching is required. The baseband input for I channel. This is a balanced input. A DC bias has to be supplied to the pin. Same as pin 20, except complementary input. This pin should be pull low (0 V) in FM mode. Supply voltage for the I/Q modulator. The baseband input for Q channel. This is a balanced input. A DC bias has to be supplied to the pin. Same as pin 23, except complementary input. There is no connection on this pin. Should be tied to ground. There is no connection on this pin. Should be tied to ground. There is no connection on this pin. Should be tied to ground. Output of the PCS upconverter. Impedance matching required. Supply voltage for a differential amplifier in the upconverter block. This is a control signal input pin. When the input is low, the IF VCOs, RF Mixer and buffers, and divide by 2 sections will be disabled. When the input is high, the mentioned sections will be enabled. Output of the Cellular upconverter. Impedance matching required. Supply voltage for the dividers and VCO buffer. There is no connection on this pin. Should be tied to ground. There is no connection on this pin. Should be tied to ground. There is no connection on this pin. Should be tied to ground. Input pin for the modulator LO signal. The frequency is 2xIF. Can be used single-ended. AC ground the unused pin. Input pin for the modulator LO signal. The frequency is 2xIF. Can be used single-ended. AC ground the unused pin. There is no connection on this pin. Should be tied to ground. There is no connection on this pin. Should be tied to ground. This is a control signal input pin. When the input is low, the AMPS mode is selected. If the input is high, TDMA mode is selected. FM output is 9 dB higher at the modulator output. Input pin for the modulator LO signal. The frequency is 2xIF. Can be used single-ended. AC ground the unused pin. Input pin for the modulator LO signal. The frequency is 2xIF. Can be used single-ended. AC ground the unused pin. 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
Conexant - Proprietary
Data Subject to Change
3
CX74037 Table 1. CX74037 Signal Definition (2 of 2) Pin No.
43 44 45 46 47 48 NC NC LO_PCS_IN VCC_MIX LO_CELL VGA_EN
Transmit RF IC for TDMA or AMPS Applications
Name
Connect to ground. Connect to ground.
Description
This is the input pin for the local oscillator for the PCS band. It is internally matched. Supply voltage for the mixer in the upconverter block and for the LO buffer. This is the input pin for the local oscillator for the cellular band. It is internally matched. This is a control signal input pin. When the input is low, the VGA and I/Q Modulator sections will be disabled. When the input is high, the mentioned sections will be enabled.
Table 2. Absolute Maximum Ratings Parameter
Supply voltage Input voltage range Power dissipation Ambient operating temperature Storage temperature -30 -40
Symbol
VCC
Minimum
-0.3 -0.3
Typical
Maximum
+5.0 VCC 600 +80 +125
Units
V V mW C C
Table 3. CX74037 Recommended Operating Conditions Parameter
Supply voltage Logic level high Logic level low Supply current in 800 MHz TDMA @ 7 dBm 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 75 75 45 84 48 20
Symbol
Minimum
2.7 1.9
Typical
3.0
Maximum
3.6 0.8
Units
V V V mA mA mA mA mA A
4
Conexant - Proprietary
Data Subject to Change
101103A September 27, 2000
Transmit RF IC for TDMA or AMPS Applications
CX74037
Table 4. CX74037 Electrical Characteristics (1 of 3)
VCC = 3.0 V, TA = 25 oC, PLO = -10 dBm, input externally matched
Parameter
Input frequency range (2X IF frequency) Input signal level
Symbol
Test Conditions IF VCO Input
Min
100 -10
Typical
Max
640
Units
MHz dBm
-3
+3
I/Q Modulator (Output Not Measurable)
Input voltage level, differential Common mode input voltage level Input DC offset Input impedance Gain variation over process, temperature, VCC I/Q gain mismatch I/Q phase imbalance 100K 0.4 0.3 2 0.4 4 1.4 1.4 1.85 2.1 4 Vp-p V mV dB dB degrees
Transmit VGA
VGA frequency range (-1 dB bandwidth) VGA gain (with a 600 differential load): Maximum Minimum VGA gain variation with VCC 3.0 to 3.6 V @ VCTRL 2 V Gain variation with temperature Gain control input impedance VGA gain slope VGA gain control range Gain slope variation over any 6 dB segment Output power level @ 20 dB gain P1dB @ 22 dB gain NF @ 22 dB gain NF at -52 dB gain Operating temperature range -30 52 +25 45 0.5 -3 -13 -3 6 53 +80 50 22 -64 -3 -1.0 40K 50 55 2.5 +3 24 -62 320 26 -60 +3 +1.0 MHz dB dB dB dB dB/V V dB/V dBm dBm dB dB C
Cellular Upconverter
LO frequency range LO input return loss (reference to 50 ) Output frequency Output return loss from 824 MHz to 849 MHz (reference to 50 ) Conversion gain 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 7 8 0.1 -33 -56 824 1017 -10 849 -15 9 1043 MHz dB MHz dB dB dB dBc dBc
101103A September 27, 2000
Conexant - Proprietary
Data Subject to Change
5
CX74037
Transmit RF IC for TDMA or AMPS Applications
Table 4. RF150 Electrical Characteristics (2 of 3)
VDD = 2.7 V, -40 oC < TA < +85 oC, unless specified
Parameter
Output P1dB Noise figure @ 8 dB gain LO to RF leakage @ maximum gain, LO = -10 dBm Operating temperature range
Symbol
Test Conditions
Min
2
Typical
3 12 -35
Max
Units
dBm
Cellular Upconverter (continued)
13 dB dBm +80 C
-30
+25
PCS Upconverter
LO frequency range LO input return loss (reference to 50 ) Output frequency Conversion gain ACPR in 30 kHz at 30 kHz offset @ -4 dBm output; cascaded ACPR in 30 kHz at 60 kHz offset @ -4 dBm output; cascaded Noise figure @ 9 dB gain P1dB LO to RF leakage @ maximum gain, LO = -15 dBm Operating temperature range -30 1850 8 9 -33 -57 9 0 -35 +25 +80 10 2078 -10 1910 10 2139 MHz dB MHz dB dBc dBc dB dBm dBm C
Cellular PA Driver
Output frequency Gain Output power level @ 14 dB gain Input return loss (reference to 50 ) Output P1dB ACPR in 30 kHz band at 30 kHz offset @ 7 dBm output; cascaded ACPR in 30 kHz band at 60 kHz offset @ 7 dBm output; cascaded Output return loss (reference to 50 ) Noise figure Operating temperature range External bias resistor value for +14.5 dBm P1dB -30 14.5 -32 -55 -15 6 +25 120 8 +80 824 13 14 7 -15 849 15 MHz dB dBm dB dBm dBc dBc dB dB C
6
Conexant - Proprietary
Data Subject to Change
101103A September 27, 2000
Transmit RF IC for TDMA or AMPS Applications
CX74037
Table 4. RF150 Electrical Characteristics (3 of 3)
VDD = 2.7 V, -40 oC < TA < +85 oC, unless specified
Parameter
Input return loss (reference to 50 ) 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 60 kHz offset @ 8.0 dBm output; cascaded Output return loss (reference to 50 ) Noise figure Operating temperature range External bias resistor value for +16 dBm of P1dB
Symbol
Test Conditions PCS PA Driver
Min
Typical
-15
Max
Units
dB
1850 15 16 8.0 14 -32 -55 -15 9 -30 +25 130
1910 17
MHz dB dBm dBm dBc dBc dB
10 +80
dB C
Table 5. Control Signal Truth Table Signal Name
VGA_ENA DRV_ENA BAND PULL_ENA IF_Select MODE
Logic 1
ON ON PCS ON IF VCO IN1 TDMA
Logic 0
OFF OFF Cell OFF IF VCO IN2 FM
Remark
Cell and PCS band IF VCO, RF mixer buffers, divide-by-2 In FM mode: Normal DC bias on I+, 0 V bias on I-
101103A September 27, 2000
Conexant - Proprietary
Data Subject to Change
7
CX74037
Transmit RF IC for TDMA or AMPS Applications
7.00 - 0.10 Pin 1
3.450 Pin 1 indication
Solder Mask Exposed Metal
7.00 - 0.10
R2 .2 25
3.450 0.300 - 0.05
0.500
Top View
Mold 1.20 - 0.10 Substrate 0.30 - 0.05
0.355 - 0.05
Bottom View
All dimensions are in millimeters
C924
Side View
Figure 3. CX74037 Package Dimensions for a 48-Pin, 7x7 LGA Package
8
Conexant - Proprietary
Data Subject to Change
101103A September 27, 2000
Transmit RF IC for TDMA or AMPS Applications
CX74037
Ordering Information
Model Name
Transmit RF IC
Manufacturing Part Number
CX74037
101103A September 27, 2000
Conexant - Proprietary
Data Subject to Change
9
(c) 2000, 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. Conexant makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Conexant's Terms and Conditions of Sale for such products, Conexant assumes no liability whatsoever. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. CONEXANT FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS. Conexant products are not intended for use in medical, lifesaving or life sustaining applications. Conexant customers using or selling Conexant products for use in such applications do so at their own risk and agree to fully indemnify Conexant for any damages resulting from such improper use or sale. The following are trademarks of Conexant Systems, Inc.: ConexantTM, the Conexant C symbol, and "What's Next in Communications Technologies"TM. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. Additional information, posted at www.conexant.com, is incorporated by reference. Reader Response: Conexant strives to produce quality documentation and welcomes your feedback. Please send comments and suggestions to tech.pubs@conexant.com. For technical questions, contact your local Conexant sales office or field applications engineer.
Further Information
Europe North - England
literature@conexant.com (800) 854-8099 (North America) (949) 483-6996 (International) Printed in USA
World Headquarters
Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax:
+44 (0)118 920 9500 +44 (0)118 920 9595 +972 9 9524000 +972 9 9573732 +33 1 41 44 36 51 +33 1 41 44 36 90 +39 02 93179911 +39 02 93179913 +46 (0) 8 5091 4319 +46 (0) 8 590 041 10 +358 (0) 9 85 666 435 +358 (0) 9 85 666 220
Europe - Israel/Greece
Conexant Systems, Inc. 4311 Jamboree Road Newport Beach, CA 92660-3007 Phone: (949) 483-4600 Fax 1: (949) 483-4078 Fax 2: (949) 483-4391
Americas U.S. Northwest/ Pacific Northwest - Santa Clara
Europe South - France
Europe Mediterranean - Italy
Europe - Sweden
Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax: Phone: Fax:
(408) 551-0270 (408) 249-7113 (949) 483-9119 (949) 483-9090 (949) 483-9119 (949) 483-9090 (858) 713-3374 (858) 713-4001 (630) 773-3454 (630) 773-3907 (972) 733-0723 (972) 407-0639 (978) 367-3200 (978) 256-6868 (919) 858-9110 (919) 858-8669
Europe - Finland
U.S. Southwest - Los Angeles
Asia - Pacific Taiwan
U.S. Southwest - Orange County
Phone: Fax:
Australia
(886-2) 2-720-0282 (886-2) 2-757-6760 (613) 9583 2650 (613) 9583 9453 86-21-6361-2515 86-21-6361-2516 (852) 2 827-0181 (852) 2 827-6488 (86) 755-518-2495 (86-10) 8529-9777 (86-10) 8529-9778 (91-11) 341 2216 (91-11) 341 2217 (82-2) 565-2880 (82-2) 565-1440 (82-53) 745-2880 (82-53) 745-1440 (65) 737 7355 (65) 737 9077 (81-3) 5371 1520 (81-3) 5371 1501
U.S. Southwest - San Diego
Phone: Fax: Phone: Fax: Phone: Fax: Phone: Phone: Fax:
India
China - Central U.S. North Central - Illinois
China - South U.S. South Central - Texas
China - South (Satellite) U.S. Northeast - Massachusetts
China - North
U.S. Southeast - North Carolina
U.S. Southeast - Florida/ South America
Phone: Fax:
Korea
Phone: Fax: Phone: Fax: Phone: Fax:
Europe
(727) 799-8406 (727) 799-8306 (215) 244-6784 (215) 244-9292 (613) 271-2358 (613) 271-2359
Phone: Fax: Phone: Fax:
Singapore
U.S. Mid-Atlantic - Pennsylvania Korea (Satellite)
Canada - Ontario
Phone: Fax:
Japan
Europe Central - Germany
Phone: Fax:
+49 89 829-1320 +49 89 834-2734
Phone: Fax:
www.conexant.com

▲Up To Search▲

Price & Availability of CX74037

	To Download CX74037 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .