AD5428 Analog Devices, AD5428 Datasheet - Page 9

• Manufacturer Part Number: AD5428
• Description: Dual 8-Bit, High Bandwidth Multiplying DACs with Parallel Interface
• Manufacturer: Analog Devices

Specifications of AD5428

• Resolution (bits): 8bit
• Dac Update Rate: 21.3MSPS
• Dac Settling Time: 30ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

Data Sheet
Table 6. AD5447 Pin Function Descriptions
Pin No.
1
2, 24
3, 23
4, 22
5
6
7 to 18
19
20
21
Mnemonic
AGND
I
R
V
DGND
DAC A/B
DB11 to DB0
CS
R/W
V
OUT
FB
REF
DD
A, R
A, I
A, V
OUT
FB
REF
B
B
B
Description
DAC Ground Pin. This pin should typically be tied to the analog ground of the system, but can be biased to
achieve single-supply operation.
DAC Current Outputs.
DAC Feedback Resistor Pins. Establish voltage output for the DAC by connecting to an external amplifier
output.
DAC Reference Voltage Input Terminals.
Digital Ground Pin.
Selects DAC A or DAC B. Low selects DAC A; high selects DAC B.
Parallel Data Bits 11 Through 0.
Chip Select Input. Active low. Used in conjunction with R/W to load parallel data to the input latch or to read
data from the DAC register.
Read/Write. When low, used in conjunction with CS to load parallel data. When high, used in conjunction with
CS to read back the contents of the DAC register. When CS and R/W are held low, the latches are transparent.
Any changes on the data lines are reflected in the relevant DAC output.
Positive Power Supply Input. This part can be operated from a supply of 2.5 V to 5.5 V.
Figure 6. Pin Configuration 24-Lead TSSOP (RU-24)
DAC A/B
V
AGND
DGND
I
R
DB11
DB10
OUT
REF
DB9
DB8
DB7
DB6
FB
A
A
A
12
10
11
1
2
3
4
5
6
7
8
9
Rev. C | Page 9 of 32
(Not to Scale)
AD5447
TOP VIEW
15
14
13
24
23
22
21
20
19
18
17
16
I
R
V
V
R/W
CS
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
OUT
FB
REF
DD
B
B
B
AD5428/AD5440/AD5447