AD9747-EBZ View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD9747-EBZ Datasheet PDF : 28 Pages
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AD9741/AD9743/AD9745/AD9746/AD9747
SPI REGISTER DESCRIPTIONS
Table 15.
Register
Address Bit Name
Description
SPI Control
0x00
7 SDIODIR
0, operate SPI in 4-wire mode, SDIO pin operates as an input only
1, operate SPI in 3-wire mode, SDIO pin operates as a bidirectional I/O line
6 LSBFIRST
0, LSBFIRST off, SPI serial data mode is MSB to LSB
1, LSBFIRST on, SPI serial data mode is LSB to MSB
5 SWRESET
0, resume normal operation following software RESET
1, software RESET; loads default values to all registers (except Register 0x00)
Data Control
0x02
7 DATTYPE
0, DAC input data is twos complement binary format
1, DAC input data is unsigned binary format
6 ONEPORT
0, normal two port input mode
1, optional single port input mode, interleaved data received on Port 1 only
4 INVDCO
1, inverts data clock output signal
Power Down
0x03
7 PD_DCO
1, power down data clock output
5 PD_AUX2
1, power down AUX2 DAC
4 PD_AUX1
1, power down AUX1 DAC
3 PD_BIAS
1, power down reference voltage bias circuit
2 PD_CLK
1, power down DAC clock input circuit
1 PD_DAC2
1, power down DAC2 analog output
0 PD_DAC1
1, power down DAC1 analog output
DAC Mode Select 0x0A
3:2 DAC1MOD<1:0> 00, selects normal mode, DAC1
01, selects mix mode, DAC1
10, selects return-to-zero mode, DAC1
1:0 DAC2MOD<1:0> 00, selects normal mode, DAC2
01, selects mix mode, DAC2
10, selects return-to-zero mode, DAC2
DAC1 Gain
0x0B
7:0 DAC1FSC<7:0> DAC1 full-scale 10-bit adjustment word
0x0C
1:0 DAC1FSC<9:8> 0x03FF, sets full-scale current to the maximum value of 31.66 mA
0x01F9, sets full-scale current to the nominal value of 20.0 mA
0x0000, sets full-scale current to the minimum value of 8.64 mA
AUX DAC1
0x0D
7:0 AUXDAC1<7:0> Auxiliary DAC1 10-bit output current adjustment word
0x0E
1:0 AUXDAC1<9:8> 0x03FF, sets output current magnitude to 2.0 mA
0x0200, sets output current magnitude to 1.0 mA
0x0000, sets output current magnitude to 0.0 mA
7 AUX1PIN
0, AUX1P output pin is active
1, AUX1N output pin is active
6 AUX1DIR
0, configures AUX1 DAC output to source current
1, configures AUX1 DAC output to sink current
DAC2 Gain
0x0F
7:0 DAC2FSC<7:0> DAC2 full-scale 10-bit adjustment word
0x10
1:0 DAC2FSC<9:8> 0x03FF, sets full-scale current to the maximum value of 31.66 mA
0x01F9, sets full-scale current to the nominal value of 20.0 mA
0x0000, sets full-scale current to the minimum value of 8.64 mA
AUX DAC2
0x11
7:0 AUXDAC2<7:0> Auxiliary DAC2 10-bit output current adjustment word
0x12
1:0 AUXDAC2<9:8> 0x03FF, sets output current magnitude to 2.0 mA
0x0200, sets output current to 1.0 mA
0x0000, sets output current to 0.0 mA
7 AUX2PIN
0, AUX2P output pin is active
1, AUX2N output pin is active
6 AUX2DIR
0, configures AUX2 DAC output to source current
1, configures AUX2 DAC output to sink current
Rev. 0 | Page 21 of 28
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