CS5530 datasheet(33/36 Pages) CIRRUS

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CS5530

DS742F2

Measurement and Reference Inputs

AIN1+, AIN1- – Differential Analog Input

Differential input pins into the device.

VREF+, VREF- – Voltage Reference Input

Fully differential inputs which establish the voltage reference for the on-chip modulator.

C1, C2 – Amplifier Capacitor Inputs

Connections for the instrumentation amplifier’s capacitor.

Power Supply Connections

VA+ – Positive Analog Power

Positive analog supply voltage.

VD+ – Positive Digital Power

Positive digital supply voltage (nominally +3.0 V or +5 V).

VA- – Negative Analog Power

Negative analog supply voltage.

DGND – Digital Ground

Digital Ground.

4. SPECIFICATION DEFINITIONS

Linearity Error

The deviation of a code from a straight line which connects the two endpoints of the ADC

transfer function. One endpoint is located 1/2 LSB below the first code transition and the other

endpoint is located 1/2 LSB beyond the code transition to all ones. Units in percent of full-

scale.

Differential Nonlinearity

The deviation of a code's width from the ideal width. Units in LSBs.

Full-scale Error

The deviation of the last code transition from the ideal [{(VREF+) - (VREF-)} - 3/2 LSB]. Units

are in LSBs.

Unipolar Offset

The deviation of the first code transition from the ideal (1/2 LSB above the voltage on the AIN-

pin.). When in unipolar mode (U/B bit = 1). Units are in LSBs.

Bipolar Offset

The deviation of the mid-scale transition (111...111 to 000...000) from the ideal (1/2 LSB below

the voltage on the AIN- pin). When in bipolar mode (U/B bit = 0). Units are in LSBs.

CS5530 Datenblatt(PDF) 33 Page - Cirrus Logic