W3030 Datasheet, PDF (6/22 Pages) Agere Systems – W3030 3 V Dual-Mode IF Cellular Receiver

W3030 3 V Dual-Mode IF Cellular Receiver
Data Sheet
April 1999
Pin Information (continued)
Table 1. Pin Descriptions (continued)
Pin
Number
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin Name
Pin Description
ENBD
ENBA
Q
Q
CLK
I
I
AGC
VCM
IFDACG
IFDIN
IFD IN
GND2
Enable Digital Mode. Positive logic enable connection for digital mode operation.
Enable Analog Mode. Positive logic enable connection for analog mode
operation.
Q Output. Differential output from Q mixer of quadrature demodulator.
Q Output (Inverting). Differential output from Q mixer of quadrature demodulator.
Clock Input. Local oscillator (clock) input to quadrature demodulator phase shifter;
to be capacitively coupled. Input frequency must be four times second IF center
frequency.
I Output (Inverting). Differential output from I mixer of quadrature demodulator.
I Output. Differential output from I mixer of quadrature demodulator.
Automatic Gain Control. AGC control input; to be connected to dc source of
0.25 V—1.55 V.
Common-Mode Voltage. Common-mode voltage dc offset set point for I & Q
interface, typically VCC/2.
Digital Signal Ground. Signal ground for digital section limiting amplifier; connect
to ground with 0.1 µF capacitor.
Digital Second IF Input. Differential input to digital section AGC amplifier; to be
directly coupled to dielectric sources such as ceramic filters. Pin 30 is
approximately 2 kΩ with pin 29 ac-grounded.
Digital Second IF Input (Inverting). Differential input to digital section AGC
amplifier. To be ac-grounded.
Second IF Ground. Power supply ground for both analog and digital second IF
amplifier and demodulator sections.
Table 2. Digital Control Pin Truth Table
Control Pin
ENBA ENBD
LOW
LOW
LOW
HIGH
HIGH
LOW
HIGH
HIGH
Mode/Function
All Sleep. All receive circuits powered down, supply current <10 µA.
Digital Receive. First IF mixing stage, AGC amp and I/Q quadrature
demodulators active.
Analog/FM Receive. First IF mixing stage, 40 dB IF amp, 60 dB limiting amp,
RSSI, and FM detector active.
All Active. All receive circuits functional, e.g., digital mode I & Q demodulator
used with analog RSSI.
6
Lucent Technologies Inc.