AD9776A Analog Devices, AD9776A Datasheet - Page 29

• Manufacturer Part Number: AD9776A
• Description: Dual 12-Bit, 1 GSPS, Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9776A

• Resolution (bits): 12bit
• Dac Update Rate: 1GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

Table 14. 3-Wire Interface Register Description
Register Name
Comm
Digital Control
Register
Address
0x00
0x00
0x00
0x00
0x00
0x00
0x01
0x01
0x01
0x01
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
Bits
7
6
5
4
3
1
7:6
5:2
1
0
7
6
5
4
3
2
1
0
Parameter
SDIO bidirectional
LSB/MSB first
Software reset
Power-down mode
Auto power-down enable
PLL lock indicator
(read only)
Interpolation Factor[1:0]
Filter Modulation Mode[3:0]
DATACLK Delay[4]
Zero stuffing enable
Data format
Single port
Real mode
DATACLK delay enable
Inverse sinc enable
DATACLK invert
TxEnable invert
Q first
Rev. B | Page 29 of 56
Function
0: use SDIO pin as input data only.
1: use SDIO as both input and output data.
0: first bit of serial data is MSB of data byte.
1: first bit of serial data is LSB of data byte.
Bit must be written with a 1 and then 0 to soft reset
the 3-wire interface register map.
0: all circuitry is active.
1: disable all digital and analog circuitry, only
3-wire interface port is active.
Controls auto power-down mode. See the Power-
Down and Sleep Modes section.
0: PLL is not locked.
1: PLL is locked.
00: 1× interpolation.
01: 2× interpolation.
10: 4× interpolation.
11: 8× interpolation.
See Table 19 for filter modes.
Sets MSB of delay of REFCLK input to DATACLK
output.
0: zero stuffing off.
1: zero stuffing on.
0: twos compliment.
1: unsigned binary.
0: both P1D and P2D data ports enabled.
1: data for both DACs received on P1D data port.
0: enable Q path for signal processing.
1: disable Q path data (internal Q channel clocks
disabled, I and Q modulators disabled).
Enables the DATACLK delay feature. More details
on this feature are shown in the Optimizing the
Data Input Timing section.
0: inverse sinc filter disabled.
1: inverse sinc filter enabled.
0: output DATACLK same phase as internal data
sampling clock, DCLK_SMP signal.
1: output DATACLK opposite phase as internal data
sampling clock, DCLK_SMP signal.
Inverts the polarity of Pin 39, the TXENABLE input
pin (also functions as IQSELECT).
0: in interleaved mode, the I data precedes the
Q data on the input port.
1: in interleaved mode, the Q data precedes the
I data on the input port.
AD9776A/AD9778A/AD9779A
Default
0
0
0
0
00
0000
0
0
0
0
0
0
0
0