AD7616BSTZ datasheet(15/51 Pages) AD

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AD7616

Data Sheet

Rev. 0 | Page 14 of 50

Pin No.

Type1

Mnemonic2

Description

64, 65, 66

CHSEL0, CHSEL1,

CHSEL2

Channel Selection Input 0 to Input 2. In hardware mode, these inputs select the input

channels for the next conversion in Channel Group A and Channel Group B. For example,

CHSELx = 0x000 selects V0A and V0B for the next conversion; CHSELx = 0x001 selects V1A and

V1B for the next conversion.

In software mode, these pins must be connected to DGND.

BUSY

Busy Output. This pin transitions to a logic high after a CONVST rising edge and indicates that

the conversion process has started. The BUSY output remains high until the conversion

process for the current selected channels is complete. The falling edge of BUSY signals that

the conversion data is being latched into the output data registers and is available to read.

Data must be read after BUSY returns to low. Rising edges on CONVST have no effect while

the BUSY signal is high.

CONVST

Conversion Start Input for Channel Group A and Channel Group B. This logic input initiates

conversions on the analog input channels.

A conversion is initiated when CONVST transitions from low to high for the selected analog

input pair. When burst mode and oversampling mode are disabled, every CONVST transition

from low to high converts one channel pair. In sequencer mode, when burst mode or

oversampling is enabled, a single CONVST transition from low to high is necessary to perform

the required number of conversions.

CAP

REGGND

Internal Analog Regulator Ground. This pin must connect to the AGND plane of a system.

CAP

REGCAP

Decoupling Capacitor Pin for Voltage Output from Internal Analog Regulator. Decouple this

output pin separately to REGGND using a 10 μF capacitor. The voltage at this pin is 1.87 V

typical.

V0B

Analog Input for Channel 0, ADC B.

AI GND

V0BGND

Analog Input Ground Pin. This pin corresponds to Analog Input Pin V0B.

V1B

Analog Input for Channel 1, ADC B.

AI GND

V1BGND

Analog Input Ground Pin. This pin corresponds to Analog Input Pin V1B.

V2B

Analog Input for Channel 2, ADC B.

AI GND

V2BGND

Analog Input Ground Pin. This pin corresponds to Analog Input Pin V2B.

V3B

Analog Input for Channel 3, ADC B.

AI GND

V3BGND

Analog Input Ground Pin. This pin corresponds to Analog Input Pin V3B.

1 AI is analog input, GND is ground, P is power supply, REF is reference input/output, DI is digital input, DO is digital output, and CAP is decoupling capacitor pin.

2 Note that throughout this data sheet, multifunction pins, such as SER/PAR, are referred to either by the entire pin name or by a single function of the pin, for example,

SER, when only that function is relevant.

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