SKY74067-21 Skyworks Solutions, SKY74067-21 Datasheet

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SKY74067-21

Manufacturer Part Number
SKY74067-21
Description
Dual-Band CDMA2000 Transmitter for Cellular CDMA and PCS Femtocell Applications
Manufacturer
Skyworks Solutions
Datasheet
DATA SHEET
SKY74067-21: Dual-Band CDMA2000 Transmitter for Cellular
CDMA and PCS Femtocell Applications
Applications
• Cellular CDMA and PCS femto/pico cell base stations
• Cellular CDMA and PCS repeaters
Features
• Low power consumption in all operating modes
• Direct upconversion architecture
• Device controlled using a three-wire read/write serial bus
• Baseband RC filter to reject receive band noise
• Fully integrated VCO with auto-tuning
• Dual-mode fractional-N/integer-N PLL
• Variable gain PA drivers
• Differential cellular driver output matched to 200 Ω
• Single-ended PCS driver output matched to 50 Ω
• Transmit power control with >75 dB dynamic range
• Low current consumption at low transmit power minimizes
• Hardware TX_ENABLE for gated mode operation
• RFLGA™ (32-pin, 5 x 5 x 1 mm) Pb-free (MSL3, 260 °C per
interface with independent supply voltage
current consumption and noise
JEDEC J-STD-020) package with downset paddle
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances) compliant packaging.
200803A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Description
The SKY74067-21 transmitter is a highly integrated device for
dual-band Code Division Multiple Access (CDMA) femtocell base
station applications. The SKY74067-21 supports femtocells in the
cellular CDMA and Personal Communications System (PCS)
bands.
The device requires a minimum number of external components
to complete a CDMA2000 radio subsystem. Included on-chip are
the baseband filter, direct upconversion In-Phase and Quadrature
(I/Q) mixers, variable gain power amplifier (PA) drivers, a fully
integrated Voltage Controlled Oscillator (VCO) with Local Oscillator
(LO) generation blocks, and a dual-mode fractional-N/integer-N
Phase Locked Loop (PLL).
External components needed for operation include bias resistors,
bypass capacitors, and passives to comprise the PLL loop filter.
The signal enters the chip as an analog baseband In-Phase and
Quadrature (I/Q) signal. It is filtered by the baseband filter and
upconverted to the desired RF transmit frequency. The signal is
amplified by one of two upconverters, depending on whether the
chip is operating in cellular or PCS mode. The resulting signal is
fed through the appropriate PA driver stage to provide variable
output power and to drive the external PA. The signal is then
filtered by an external Surface Acoustic Wave (SAW) filter and
sent to the PA to obtain the final rated power.
The 32-pin RF Land Grid Array (RFLGA) device package and
pinout are shown in Figure 1. Figure 2 shows a functional block
diagram for the SKY74067-21.
www.DataSheet4U.com
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SKY74067-21 Summary of contents

Page 1

... Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009 www.DataSheet4U.com Description The SKY74067-21 transmitter is a highly integrated device for dual-band Code Division Multiple Access (CDMA) femtocell base station applications. The SKY74067-21 supports femtocells in the cellular CDMA and Personal Communications System (PCS) bands ...

Page 2

... DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER VCC_PLL_1 VCC_PLL_2 VCO_TUNE VCO_EXT_RES VCO_BYPASS Figure 1. SKY74067-21 Transmitter Pinout – 32-Pin RFLGA ( mm) LD_OUT Fractional-N/ Integer-N PLL CP VCO_IO Integrated VCO Tank Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 April 13, 2009 • ...

Page 3

... Technical Description Baseband Filter In voltage mode operation, the baseband section of the SKY74067-21 contains a simple RC filter to reject receive band noise from incoming I and Q signals. VCO, LO Chain, and PLL The VCO has an internal tank circuit automatically tuned to the desired frequency. The VCO is connected to an on-chip PLL and LO generation blocks ...

Page 4

... DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Table 1. SKY74067-21 Signal Descriptions Pin # Name 1 LD_OUT Lock detect output. Open drain. 2 VCC_PLL_1 Supply for the PLL. 3 N/C No connection 4 CP Charge pump output. 5 VCC_PLL_2 Supply for the PLL. 6 VCO_IO Input/output port for the VCO bi- directional buffer ...

Page 5

... Z of logic control inputs IN Supply current: Cellular CDMA mode @ 5 dBm PCS mode @ 5 dBm Supply current in sleep mode Table 4. SKY74067-21 Electrical Specifications ( +25 °C, VCC = 2.85 V, CDMA2000 Waveform Used Unless Otherwise Noted Parameter Baseband Filter Cutoff frequency Amplitude ripple Amplitude imbalance between I and Q ...

Page 6

... DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Table 4. SKY74067-21 Electrical Specifications ( +25 °C, VCC = 2.85 V, CDMA2000 Waveform Used Unless Otherwise Noted Parameter I/Q RF Upconverter and Driver, Cellular CDMA (continued) Residual sideband suppression Carrier suppression (Note 1) Gain variation over the frequency band Output return loss @ maximum power ...

Page 7

... Table 4. SKY74067-21 Electrical Specifications ( +25 °C, VCC = 2.85 V, CDMA2000 Waveform Used Unless Otherwise Noted Parameter I/Q RF Upconverter and Driver, PCS (continued) Supply current including LO chain: Current mode @ minimum power Current mode @ –30 dBm Current mode @ +9 dBm Supply current including LO chain: Voltage mode @ minimum power Voltage mode @ – ...

Page 8

... DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 8 April 13, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200803A ...

Page 9

... Pin #1 Top View Side View All measurements are in millimeters Figure 4. SKY74067-21 32-Pin RFLGA Package Dimension Drawing ∅1.55 ± 0.05 0.30 ± 0.05 B Pin #1 Indicator Max. B 1.70 B Notes: 1. Carrier tape: black conductive polystyrene 2. Cover tape material: transparent conductive PSA 3. Cover tape size: 9.3 mm width 4 ...

Page 10

... DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Ordering Information Model Name SKY74067-21 CDMA2000 Transmitter Copyright © 2009 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer ...

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