AD7002

–16–

REV. B

PQFP Pin

Number

Mnemonic

Function

19

I/

Q (QDATA)

This is a dual function digital output. When the device is operating in MODE 0, it indicates

whether IDATA or QDATA is present on Rx DATA pin. In MODE 1, QDATA is available at

this pin.

20

Rx SYNC

Synchronization output for framing I and Q data at the receive interface.

21

Rx CLK

Output clock for the receive section interface.

22

THREE-STATE

This digital input controls the output three-state drivers on the receive section interface. When

CONTROL

it is High, the outputs are enabled. When Low, they are in high impedance.

23

CAL

Calibration control pin for digital filter section. When brought high, for a minimum of 608 master

clock cycles, the receive section enters a calibration cycle. Where I and Q offset registers are up-

dated, when the CAL pin is brought low again, with offset values which are subtracted out from

subsequent ADC conversions. CAL should remain Low during normal operation.

29

MZERO

Digital control input. When high the analog modulator input is internally grounded (i.e., tied to

normal operation.

27, 24

Power-down control inputs for receive section. When high, the receive section goes into

hardwired together for normal device operation.

AUXILIARY INTERFACE AND CONTROL

32

AUX LATCH

Synchronization input for the auxiliary DACs’ shift register and AUX OUT.

31

AUX CLK

Clock input for the auxiliary DACs’ 16-bit shift register. AUX DATA is latched on the falling

edge of AUX CLK while AUX LATCH is low.

30

AUX DATA

Data input for the AUX DACs and the AUX FLAG serial interface.

33

AUX FLAG

Digital output flag, this can be used as a digital control output and is controlled from the auxiliary

serial interface.

TEST

8, 26

Test l, Test 2

Test pins for factory use only. These pins should be left unconnected and not used as routes for

other circuit signals.

14, 43

Test 3, Test 4

Test pins. These must be tied to ground for normal device operation.

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

Plastic Quad Flatpack Package

(S-44)

1

44

34

33

23

22

12

11

TOP VIEW

PIN 1

0.016 (0.41)

0.012 (0.30)

0.033 (0.84)

0.029 (0.74)

0.096 (2.44)

MAX

0.037 (0.94)

0.025 (0.64)

0.398 (10.11)

0.390 (9.91)

0.083 (2.11)

0.077 (1.96)

0.040 (1.02)

0.032 (0.81)

0.040 (1.02)

0.032 (0.81)

0.398 (10.11)

0.390 (9.91)

0.548 (13.925)

0.546 (13.875)

8

°

0.8

°