AD7237AAN Analog Devices Inc, AD7237AAN Datasheet - Page 5

• Manufacturer Part Number: AD7237AAN
• Description: IC DAC 12BIT W/AMP W/BUFF 24-DIP
• Manufacturer: Analog Devices Inc
• Series: DACPORT®r

Specifications of AD7237AAN

• Mounting Type: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Rohs Status: RoHS non-compliant
• Settling Time: 8µs
• Number Of Bits: 12
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Dual ±
• Operating Temperature: -40°C ~ 85°C
• No. Of Bits: 12 Bit
• Interface Type: Serial
• Power Dissipation (max): -

REV. 0
AD7247A PIN FUNCTION DESCRIPTION (DIP PIN NUMBERS)
Pin
1
2
3
4
5
6
7–15
16
17
18
19
20
21
22
23
24
Mnemonic
REF OUT
R
V
DB11
DB10
GND
DB9-DB1
DB0
CSB
CSA
WR
V
V
V
R
REF IN
OFSB
OUTB
DD
OUTA
SS
OFSA
AD7237A PIN CONFIGURATION
DIP and SOIC
Data Bit 11 (MSB).
Data Bit 9 to Data Bit 1.
Description
Voltage Reference Output. The internal 5 V analog reference is provided at this pin. To operate the part
with internal reference, REF OUT should be connected to REF IN.
Output Offset Resistor for DAC B. This input configures the output ranges for DAC B. It is connected to
V
Analog Output Voltage from DAC B. This is the buffer amplifier output voltage. Three different output
voltage ranges can be chosen: 0 V to +5 V, 0 V to +10 V and 5 V. The amplifier is capable of developing
+10 V across a 2 k resistor to GND.
Data Bit 10.
Ground. Ground reference for all on-chip circuitry.
Data Bit 0 (LSB).
Chip Select Input for DAC B. Active low logic input. DAC B is selected when this input is active.
Chip Select Input for DAC A. Active low logic input. DAC A is selected when this input is active.
Write Input. WR is an active low logic input which is used in conjunction with CSA and CSB to write data
to the DAC latches.
Positive Supply (+12 V to +15 V).
Analog Output Voltage from DAC A. This is the buffer amplifier output voltage. Three different output
voltage ranges can be chosen: 0 V to +5 V, 0 V to +10 V and 5 V. The amplifier is capable of developing
+10 V across a 2 k resistor to GND.
Negative Supply (0 V or –12 V to –15 V).
Output Offset Resistor for DAC A. This input configures the output ranges for DAC A. It is connected to
V
Voltage Reference Input. The common reference voltage for both DACs is applied to this pin. It is internally
buffered before being applied to both DACs. The nominal reference voltage for correct operation of the
AD7247A is 5 V.
OUTB
OUTA
for the +5 V range, to GND for the +10 V range and to REF IN for the 5 V range.
for the +5 V range, to GND for the +10 V range and to REF IN for the 5 V range.
–5–
AD7247A PIN CONFIGURATION
DIP and SOIC
AD7237A/AD7247A