AD9746_15 Datasheet, PDF (12/28 Pages) Analog Devices – Dual 8-/10-/12-/14-/16-Bit 250 MSPS Digital-to-Analog Converters

AD9741/AD9743/AD9745/AD9746/AD9747
Data Sheet
CVDD18 1
CVSS 2
CLKP 3
CLKN 4
CVSS 5
CVDD18 6
DVSS 7
DVDD18 8
P1D13 9
P1D12 10
P1D11 11
P1D10 12
P1D9 13
P1D8 14
P1D7 15
P1D6 16
P1D5 17
P1D4 18
NC = NO CONNECT
PIN 1
INDICATOR
AD9746
(TOP VIEW)
54 FSADJ
53 RESET
52 CSB
51 SCLK
50 SDIO
49 SDO
48 DVSS
47 DVDD18
46 NC
45 NC
44 P2D0
43 P2D1
42 P2D2
41 P2D3
40 P2D4
39 P2D5
38 P2D6
37 P2D7
Figure 5. AD9746 Pin Configuration
Table 11. AD9746 Pin Function Descriptions
Pin No.
Mnemonic Description
1, 6
CVDD18
Clock Supply Voltage (1.8 V).
2, 5
CVSS
Clock Supply Common (0 V).
3
CLKP
Differential DAC Clock Input.
4
CLKN
Complementary Differential DAC Clock Input.
7, 28, 48
DVSS
Digital Supply Common (0 V).
8, 47
DVDD18
Digital Core Supply Voltage (1.8 V).
9 to 22
P1D<13:0> Port 1 Data Bit Inputs.
23, 24, 26, 30, 45, 46 NC
No Connect.
25
DCO
Data Clock Output. Use to clock data source.
27
DVDD33
Digital I/O Supply Voltage (3.3 V).
29
IQSEL
I/Q Framing Signal for Single-Port Mode Operation.
31 to 44
P2D<13:0> Port 2 Data Bit Inputs.
49
SDO
Serial Peripheral Interface Data Output.
50
SDIO
Serial Peripheral Interface Data Input and Optional Data Output.
51
SCLK
Serial Peripheral Interface Clock Input.
52
CSB
Serial Peripheral Interface Chip Select Input. Active low.
53
RESET
Hardware Reset. Active high.
54
FSADJ
Full-Scale Current Output Adjust. Connect a 10 kΩ resistor to AVSS.
55
REFIO
Reference Input/Output. Connect a 0.1 μF capacitor to AVSS.
56, 57, 71, 72
AVDD33
Analog Supply Voltage (3.3 V).
58, 61, 64, 67, 70
AVSS
Analog Supply Common (0 V).
59
IOUT2P
DAC2 Current Output True. Sources full-scale current when input data bits are all 1.
60
IOUT2N
DAC2 Current Output Complement. Sources full-scale current when data bits are all 0.
62
AUX2P
Auxiliary DAC2 Default Current Output Pin.
63
AUX2N
Auxiliary DAC2 Optional Output Pin. Enable through SPI.
65
AUX1N
Auxiliary DAC1 Optional Output Pin. Enable through SPI.
66
AUX1P
Auxiliary DAC1 Default Current Output Pin.
68
IOUT1N
Complementary DAC1 Current Output. Sources full-scale current when data bits are all 0.
69
IOUT1P
DAC1 Current Output. Sources full-scale current when data bits are all 1.
EPAD
AVSS
Exposed Thermal Pad. Must be soldered to copper pour on top surface of PCB for mechanical stability
and must be electrically tied to low impedance GND plane for low noise performance.
Rev. A | Page 12 of 28