AD5428_15 Datasheet, PDF (8/33 Pages) Analog Devices – Dual 8-/10-/12-Bit, High Bandwidth, Multiplying DACs with Parallel Interface

Data Sheet
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
AD5428/AD5440/AD5447
AGND 1
I_OUTA 2
R_FBA 3
V_REFA 4
DGND 5
AD5428
TOP VIEW
(Not to Scale)
20 I_OUTB
19 R_FBB
18 V_REFB
17 V_DD
16 R/W
DAC A/B 6
15 CS
DB7 7
14 DB0 (LSB)
DB6 8
13 DB1
DB5 9
12 DB2
DB4 10
11 DB3
Figure 4. Pin Configuration 20-Lead TSSOP (RU-20)
Table 4. AD5428 Pin Function Descriptions
Pin No. Mnemonic Description
1
AGND
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.
2, 20
3, 19
IOUTA, IOUTB
RFBA, RFBB
DAC Current Outputs.
DAC Feedback Resistor Pins. These pins establish voltage output for the DAC by connecting to an external
amplifier output.
4, 18
5
VREFA, VREFB
DGND
DAC Reference Voltage Input Terminals.
Digital Ground Pin.
6
DAC A/B
Selects DAC A or DAC B. Low selects DAC A; high selects DAC B.
7 to14
DB7 to DB0 Parallel Data Bits 7 Through 0.
15
CS
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.
16
R/W
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.
17
VDD
Positive Power Supply Input. This part can be operated from a supply of 2.5 V to 5.5 V.
Rev. C | Page 7 of 32