AD7367

Preliminary Technical Data

Rev. PrD | Page 8 of 16

applied externally to the rest of a system.

10

Negative power supply voltage. This is the negative supply voltage for the Analog Input section. The supply

must be less than a maximum voltage of -11.5V for all input ranges. See Table 6 for further details. 10 µF and

11,12

Analog Inputs of ADC A. These are both single-ended analog inputs. The Analog input range on these

channels is determined by the RANGE0 and RANGE1 pins.

13,14

Analog Inputs of ADC B. These are both single-ended analog inputs. The Analog input range on these

channels is determined by the RANGE0 and RANGE1 pins.

15

Positive power supply voltage. This is the positive supply voltage for the Analog Input section. The supply

must be greater than a minimum voltage of 11.5V for all the analog input ranges. See Table 6 for further

18

REFSEL

Internal/External Reference Selection. Logic input. If this pin is tied to a logic high, the on-chip 2.5 V

must be tied to decoupling capacitors. If the REF SELECT pin is tied to GND, an external reference can be

19

CS

Chip Select. Active low logic input. This input frames the serial data transfer. When CS is logic low the

20

SCLK

Serial Clock. Logic input. A serial clock input provides the SCLK for accessing the data from the AD7367.

21

CONVST

Conversion Start. Edge triggered logic input. On the falling edge of this input the track/hold goes into hold

mode and conversion is initiated. If CONVST is low at the end of a conversion, the part goes into power-

down mode. In this case, the rising edge of CONVST will instruct the part to power up again.

22

BUSY

BUSY Output. Transitions high when a conversion is started and remains high until the conversion is

complete.

24

DGND

Digital Ground. This is the ground reference point for all digital circuitry on the AD7367. The DGND pin

should connect to the DGND plane of a system. The DGND and AGND voltages should ideally be at the

same potential and must not be more than 0.3 V apart, even on a transient basis.