AD5446 Analog Devices, AD5446 Datasheet - Page 7

• Manufacturer Part Number: AD5446
• Description: 14-Bit High Bandwidth Multiplying DAC with Serial Interface
• Manufacturer: Analog Devices

Specifications of AD5446

• Resolution (bits): 14bit
• Dac Update Rate: 2.7MSPS
• Dac Settling Time: 80ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser,SPI

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
Mnemonic
I
I
GND
SCLK
SDIN
SYNC
SDO
V
V
R
OUT
OUT
FB
DD
REF
1
2
Description
DAC Current Output.
DAC Analog Ground. This pin should normally be tied to the analog ground of the system.
Ground Pin.
Serial Clock Input. By default, data is clocked into the input shift register on the falling edge of the serial clock
input. Alternatively, by means of the serial control bits, the device can be configured such that data is clocked
into the shift register on the rising edge of SCLK.
Serial Data Input. Data is clocked into the 16-bit input register on the active edge of the serial clock input.
By default on power-up, data is clocked into the shift register on the falling edge of SCLK. The control bits allow
the user to change the active edge to the rising edge.
Active Low Control Input. This is the frame synchronization signal for the input data. When SYNC is taken low,
data is loaded to the shift register on the active edge of the following clocks. The output updates on the rising
edge of SYNC.
Serial Data Output. This pin allows a number of parts to be daisy-chained. By default, data is clocked into the shift
register on the falling edge and out via SDO on the rising edge of SCLK. Data is always clocked out on the
alternate edge to data loaded to the shift register.
Positive Power Supply Input. This part can be operated from a supply of 2.5 V to 5.5 V.
DAC Reference Voltage Input.
DAC Feedback Resistor. Establishes voltage output for the DAC by connecting to an external amplifier output.
SCLK
I
I
SDIN
OUT
OUT
GND
Figure 5. Pin Configuration
1
2
Rev. C | Page 7 of 28
1
2
3
4
5
(Not to Scale)
AD5444/
AD5446
TOP VIEW
10
9
8
7
6
R
V
V
SDO
SYNC
REF
DD
FB
AD5444/AD5446