AD7538 Analog Devices, AD7538 Datasheet - Page 7

• Manufacturer Part Number: AD7538
• Description: LC2MOS Microprocessor-Compatible 14-Bit DAC
• Manufacturer: Analog Devices

Specifications of AD7538

• Resolution (bits): 14bit
• Dac Update Rate: 667kSPS
• Dac Settling Time: 1.5µs
• Max Pos Supply (v): +15.75V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 5. Pin Function Description
Pin No.
1
2
3
4
5
6 to 19
20
21
22
23
24
1
X = don’t care.
Mnemonic
V
R
I
AGND
DGND
DB13 to DB0
LDAC
CS
WR
V
V
OUT
REF
FB
DD
SS
Description
Voltage Reference.
Feedback Resistor. Used to close the loop around an external op amp.
Current Output Terminal.
Analog Ground
Digital Ground.
Data Inputs. Bit DB13 (MSB) to Bit DB0 (LSB).
Chip Select Input. Active low.
Asynchronous Load DAC Input. Active low.
Write Input. Active low.
CS
0
1
0
1
X
+12 V to +15 V Supply Input.
Bias pin for high temperature low leakage configuration. To implement low leakage system, the pin should be
at a negative voltage. See Figure 6 and Figure 8 for recommended circuitry.
1
X
LDAC
1
0
0
1
1
(MSB) DB13
AGND
DGND
DB12
DB10
DB11
V
I
DB9
DB8
DB7
R
OUT
REF
Figure 3. Pin Configuration
FB
Rev. B | Page 7 of 16
10
11
12
1
2
3
4
5
6
7
8
9
WR
0
X
0
X
1
1
1
(Not to Scale)
AD7538
TOP VIEW
24
23
22
20
19
18
17
16
15
14
13
21
V
V
WR
CS
LDAC
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
SS
DD
Operation
Load input register.
Load DAC register from input register.
Input and DAC registers are transparent.
No operation.
No operation.
AD7538