Wire serial interface and data description – Rainbow Electronics AT84AD004 User Manual

Page 35

AT84AD004

5390A–BDC–06/04

3-wire Serial Interface and
Data Description

The 3-wire bus is activated with the control bit mode set to 1. The length of the word is
19 bits: 16 for the data and 3 for the address. The maximum clock frequency is

50 MHz.

Table 10. 3-wire Serial Interface Address Setting Description

Address

Setting

000

Standby

Gray/binary mode

1:1 or 1:2 DMUX mode

Analog input MUX

Clock selection

Auto-calibration

Decimation test mode

Data Ready Delay Adjust

001

Analog gain adjustment

Data7 to Data0: gain channel I

Data15 to Data8: gain channel Q

Code 00000000: -1.5 dB

Code 10000000: 0 dB

Code 11111111: 1.5 dB

Steps: 0.011 dB

010

Offset compensation

Data7 to Data0: offset channel I

Data15 to Data8: offset channel Q

Data7 and Data15: sign bits

Code 11111111b: 31.75 LSB

Code 10000000b: 0 LSB

Code 00000000b: 0 LSB

Code 01111111b: -31.75 LSB

Steps: 0.25 LSB

Maximum correction: ±31.75 LSB

011

Gain compensation

Data6 to Data0: channel I/Q (Q is matched to I)

Code 11111111b: -0.315 dB

Code 10000000b: 0 dB

Code 0000000b: 0 dB

Code 0111111b: 0.315 dB

Steps: 0.005 dB

Data6: sign bit

100

Internal Settling Adjustment (ISA)

Data2 to Data0: channel I

Data5 to Data3: channel Q

Data15 to Data6: 1000010000