CX74001-12 Просмотр технического описания (PDF) - Skyworks Solutions

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CX74001-12

Rx ASIC for CDMA, AMPS, and PCS Applications

Skyworks Solutions 

Rx ASIC for CDMA, AMPS, and PCS Applications

Voltage Controlled Oscillators (VCOs)__________________

The active cores of the two VCOs are present on the CX74001,

requiring only differential external LC tanks and a PLL

synthesizer. The VCO core current is automatically adjusted to

give a constant VCO output swing, regardless of the external

tank Q.

Mode Control ______________________________________

The operation of the chip is controlled by signals CELL/PCS,

FM, and SLEEP. The Single IF (SIF) is added to use a common

IF frequency for CDMA mode in cellular and PCS band. This

allows the use of one IF SAW filter for the PCS and CDMA

modes to reduce system implementation cost. The logic blocks

are powered off of the Vcc_IF, so it must be present to obtain

chip functionality.

Electrical and Mechanical Specifications.

Signal pin assignments and functional pin descriptions are

described in Table 1. The absolute maximum ratings of the

CX74001 are provided in Table 2. The recommended operating

conditions are specified in Table 3. Electrical specifications are

CX74001

provided in Table 4. Tables 5, 6, 7, and 8 provide logic and

mode control information for the CX74001.

Figures 3 through 46 provide typical performance

characteristics. A schematic diagram of the CX74001 is

provided in Figure 47 and the package dimensions of the 48-pin

RFLGA are shown in Figure 48.

ESD Sensitivity

The CX74001 is a JEDEC Class 1 device. The following

extreme Electrostatic Discharge (ESD) precautions are required

according to the Human Body Model (HBM):

• Protective outer garments.

• Handle device in ESD safeguarded work area.

• Transport device in ESD shielded containers.

• Monitor and test all ESD protection equipment.

The HBM ESD withstand threshold value, with respect to

ground, is ±1.5 kV. The HBM ESD withstand threshold value,

with respect to VDD (the positive power supply terminal) is also

±1.5 kV.

101134A

Skyworks

3

March 5, 2002

Proprietary Information and Specifications are Subject to Change

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