AD9743 Analog Devices, AD9743 Datasheet - Page 21

• Manufacturer Part Number: AD9743
• Description: Dual 10-Bit 250 MSPS Digital-to-Analog Converters
• Manufacturer: Analog Devices

Specifications of AD9743

• Resolution (bits): 10bit
• Dac Update Rate: 250MSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

SPI REGISTER DESCRIPTIONS
Table 15.
Register
SPI Control
Data Control
Power Down
DAC Mode Select
DAC1 Gain
AUX DAC1
DAC2 Gain
AUX DAC2
Address
0x00
0x02
0x03
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
Bit
7
6
5
7
6
4
7
5
4
3
2
1
0
3:2
1:0
7:0
1:0
7:0
1:0
7
6
7:0
1:0
7:0
1:0
7
6
Name
SDIODIR
LSBFIRST
SWRESET
DATTYPE
ONEPORT
INVDCO
PD_DCO
PD_AUX2
PD_AUX1
PD_BIAS
PD_CLK
PD_DAC2
PD_DAC1
DAC1MOD<1:0>
DAC2MOD<1:0>
DAC1FSC<7:0>
DAC1FSC<9:8>
AUXDAC1<7:0>
AUXDAC1<9:8>
AUX1PIN
AUX1DIR
DAC2FSC<7:0>
DAC2FSC<9:8>
AUXDAC2<7:0>
AUXDAC2<9:8>
AUX2PIN
AUX2DIR
Description
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
0, LSBFIRST off, SPI serial data mode is MSB to LSB
1, LSBFIRST on, SPI serial data mode is LSB to MSB
0, resume normal operation following software RESET
1, software RESET; loads default values to all registers (except Register 0x00)
0, DAC input data is twos complement binary format
1, DAC input data is unsigned binary format
0, normal two port input mode
1, optional single port input mode, interleaved data received on Port 1 only
1, inverts data clock output signal
1, power down data clock output
1, power down AUX2 DAC
1, power down AUX1 DAC
1, power down reference voltage bias circuit
1, power down DAC clock input circuit
1, power down DAC2 analog output
1, power down DAC1 analog output
00, selects normal mode, DAC1
01, selects mix mode, DAC1
10, selects return-to-zero mode, DAC1
00, selects normal mode, DAC2
01, selects mix mode, DAC2
10, selects return-to-zero mode, DAC2
DAC1 full-scale 10-bit adjustment word
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
Auxiliary DAC1 10-bit output current adjustment word
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
0, AUX1P output pin is active
1, AUX1N output pin is active
0, configures AUX1 DAC output to source current
1, configures AUX1 DAC output to sink current
DAC2 full-scale 10-bit adjustment word
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
Auxiliary DAC2 10-bit output current adjustment word
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
0, AUX2P output pin is active
1, AUX2N output pin is active
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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