AD5428 Analog Devices, AD5428 Datasheet - Page 7

• 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
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Table 4. AD5428 Pin Function Descriptions
Pin No.
1
2, 20
3, 19
4, 18
5
6
7 to14
15
16
17
Mnemonic
AGND
I
R
V
DGND
DAC A/B
DB7 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. These 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 7 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 contents of the DAC register.
Positive Power Supply Input. This part can be operated from a supply of 2.5 V to 5.5 V.
Figure 4. Pin Configuration 20-Lead TSSOP (RU-20)
DAC A/B
V
AGND
DGND
I
R
OUT
REF
DB7
DB6
DB5
DB4
FB
A
A
A
10
1
2
3
4
5
6
7
8
9
Rev. C | Page 7 of 32
(Not to Scale)
AD5428
TOP VIEW
20
19
18
17
16
15
14
13
12
11
I
R
V
V
R/W
CS
DB0 (LSB)
DB1
DB2
DB3
OUT
REF
DD
FB
B
B
B
AD5428/AD5440/AD5447