AD9705 Analog Devices, AD9705 Datasheet - Page 12

• Manufacturer Part Number: AD9705
• Manufacturer: Analog Devices

Specifications of AD9705

• Resolution (bits): 10bit
• Dac Update Rate: 175MSPS
• Dac Settling Time: 11ns
• Max Pos Supply (v): +3.6V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

AD9704/AD9705/AD9706/AD9707
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
AD9707
Table 9. AD9707 Pin Function Descriptions
Pin No.
28 to 32, 1,
2, 4 to 8
3
9
10, 26
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
27
Mnemonic
DB12 to DB1
DVDD
DB0 (LSB)
DCOM
CLKVDD
CLK+
CLK−
CLKCOM
CMODE/SCLK
MODE/SDIO
PIN/SPI/RESET
AVDD
OTCM
IOUTB
IOUTA
ACOM
REFIO
FS ADJ
SLEEP/CSB
DB13 (MSB)
EPAD
Description
Data Bit 12 to Data Bit 1.
Digital Supply Voltage (1.7 V to 3.6 V).
Least Significant Data Bit (LSB).
Digital Common.
Clock Supply Voltage (1.7 V to 3.6 V).
Positive Differential Clock Input.
Negative Differential Clock Input.
Clock Common.
In pin mode, this pin selects the clock input type. Connect to CLKCOM for single-ended clock receiver
(drive CLK+ and float CLK–). Connect to CLKVDD for differential receiver. In SPI mode, this pin is the serial
data clock input.
In pin mode, this pin selects the input data format. Connect to DCOM for straight binary, and DVDD for twos
complement. In SPI mode, this pin acts as SPI data input/output.
Selects SPI Mode or Pin Mode Operation. Active high for pin mode operation and active low for SPI mode
operation. Pulse high to reset SPI registers to default values.
Analog Supply Voltage (1.7 V to 3.6 V).
Adjustable Output Common Mode. Refer to the Theory of Operation section for details.
Complementary DAC Current Output. Full-scale current is sourced when all data bits are 0s.
DAC Current Output. Full-scale current is sourced when all data bits are 1s.
Analog Common.
Reference Input/Output. Serves as reference input when internal reference disabled. Serves as 1.0 V
reference output when internal reference is activated. Requires a 0.1 μF capacitor to ACOM when internal
reference is activated.
Full-Scale Current Output Adjust.
In pin mode, active high powers down chip. In SPI mode, this pin is the serial port chip select (active low).
Most Significant Data Bit (MSB).
It is recommended that the exposed pad be thermally connected to a copper ground plane for enhanced
electrical and thermal performance.
DVDD
NOTES
1. IT IS RECOMMENDED THAT THE EXPOSED PAD BE
DB7
DB6
DB5
DB4
DB3
DB2
DB1
THERMALLY CONNECTED TO A COPPER GROUND
PLANE FOR ENHANCED ELECTRICAL AND THERMAL
PERFORMANCE.
1
2
3
4
5
6
7
8
Figure 3. AD9707 Pin Configuration
(Not to Scale)
PIN 1
INDICATOR
AD9707
TOP VIEW
Rev. B | Page 12 of 44
24
23
22
21
20
19
18
17
FS ADJ
REFIO
ACOM
IOUTA
IOUTB
OTCM
AVDD
PIN/SPI/RESET
Data Sheet