Datasheet AD7813 (Analog Devices) - 5

AD7813 PIN FUNCTION DESCRIPTIONS Pin No. Mnemonic Description
1 VREF Reference Input, 1.2 V to VDD. 2 VIN Analog Input, 0 V to VREF. 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 AD7813 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 VDD Positive power supply voltage, 2.7 V to 5.5 V.
PIN CONFIGURATION DIP/SOIC V 1 REF 16 VDD V 2 IN 15 DB7 GND 3 14 DB6 AD7813 CONVST 4 13 DB5 TOP VIEW CS 5 12 DB4 (Not to Scale) RD 6 11 DB3 BUSY 7 10 DB2 DB0 8 9 DB1
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