Power Supply Connections

VD+ - Positive Digital Power, PIN 7.

Positive digital power supply. Nominally +5 volts.

VD- - Negative Digital Power, PIN 1.

Negative digital power supply. Nominally -5 volts.

DGND - Digital Ground, PIN 6.

Digital ground reference.

VA+ - Positive Analog Power, PIN 25.

Positive analog power supply. Nominally +5 volts.

VA- - Negative Analog Power, PIN 23.

Negative analog power supply. Nominally -5 volts.

AGND - Analog Ground, PIN 22.

Analog ground reference.

Oscillator

CLKIN - Clock Input, PIN 3.

All conversions and calibrations are timed from a master clock which must be externally

supplied.

Digital Inputs

HOLD - Hold, PIN 12.

A falling transition on this pin sets the CS5126 to the hold state and initiates a conversion. This

input must remain low at least one master clock cycle plus 50ns.

L/R - Left/Right Input Channel Select, PIN 13.

Status at the end of a conversion cycle determines which analog input channel will be acquired

for the next conversion cycle.

SLEEP - Sleep, PIN 28.

When brought low causes the CS5126 to enter a low-power quiescent state. All calibration

coefficients are retained in memory, so no recalibration is needed after returning to the normal

operating mode.

CODE - 2’s Complement/Binary Coding Select, PIN 16.

Determines whether data appears in 2’s complement or offset-binary format. If high, 2’s

complement; if low, offset-binary.

SCLK - Serial Clock, PIN 14.

Serial data changes status on a falling edge of this input, and is valid on a rising edge.

CS5126

DS32F1

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