Datasheet

REV. B
AD7819
–4–
PIN FUNCTION DESCRIPTIONS
Pin
No. Mnemonic Description
1V
REF
Reference Input, 1.2 V to V
DD
.
2V
IN
Analog Input, 0 V to V
REF
.
3 GND Analog and Digital Ground.
4 CONVST Convert Start. A low-to-high transition on this pin initiates a 1.5 µs pulse on an internally generated
CONVST signal. A high-to-low transition on this line initiates the conversion process if the internal
CONVST signal is low. Depending on the signal on this pin at the end of a conversion, the AD7819
automatically powers down.
5 CS Chip Select. This is a logic input. CS is used in conjunction with RD to enable outputs.
6 RD Read Pin. This is a logic input. When CS is low and RD goes low, the DB7–DB0 leave their high
impedance state and data is driven onto the data bus.
7 BUSY ADC Busy Signal. This is a logic output. This signal goes logic high during the conversion process.
8–15 DB0–DB7 Data Bit 0 to 7. These outputs are three-state TTL-compatible.
16 V
DD
Positive power supply voltage, 2.7 V to 5.5 V.
PIN CONFIGURATION
DIP/SOIC
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
AD7819
V
REF
DB5
DB6
DB7
V
DD
V
IN
GND
CONVST
DB2
DB3
DB4
CS
RD
BUSY
DB0
DB1