WM8232 datasheet(8/141 Pages) CIRRUS

8 / 141 page

WM8232

Rev 4.6

ELECTRICAL CHARACTERISTICS

Test Conditions

AVDD = LDOVDD = DBVDD = 3.3V, AGND = LDOGND = DBGND= 0V, TA = 25C, MCLK= 35MHz unless otherwise stated.

PARAMETER

SYMBOL

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

Overall System Specification (including 10-bit ADC, PGA, Offset and CDS functions)

Conversion rate per channel

MSPS

Full-scale input voltage

(see Note 1)

ADCFS=0, Max Gain

ADCFS=0, Min Gain

0.12

2.0

Vp-p

ADCFS=1, Max Gain

ADCFS=1, Min Gain

0.18

3.0

Vp-p

Input signal voltage range

VIN

SF_INP=0

AGND

AVDD

SF_INP=1

AGND

1.2

Input capacitance

CIN

Inputs to AGND

Full-scale transition error

Gain = 0dB;

AGAIN[4:0] = 02(hex)

DGAIN[11:0] = 6AB(hex)

Zero-scale transition error

Gain = 0dB;

AGAIN[4:0] = 02(hex)

DGAIN[11:0] = 6AB(hex)

Differential non-linearity

DNL

10-bit

+/-0.5

+/-1.5

LSB

Integral non-linearity (pk-pk/2)

INL

10-bit

+/-1

+/-4

LSB

Channel to channel gain matching

Min Gain

Max Gain

Output noise

10-bit, Unity Gain

(Unused channels grounded)

0.5

2.5

LSB rms

Channel to channel crosstalk

10-bit

+/-0.5

LSB

Channel to channel offset

matching

BLC disabled

210

Programmable Gain Amplifier

Total Resolution (Ga + Gd)

bits

Analogue Gain

0.6 + 0.3 * AGAIN[4:0]

V/V

Max gain, each channel (Ga)

Ga MAX

AGAIN[4:0] = 1F(hex)

8.00

9.9

11.43

V/V

Min gain, each channel (Ga)

Ga MIN

AGAIN[4:0] = 0(hex)

0.44

0.6

0.77

V/V

Digital Gain

DGAIN[11:0] / 211

V/V

Max gain, each channel (Gd)

Gd MAX

DGAIN[11:0] = FFF(hex)

V/V

Min gain, each channel (Gd)

Gd MIN

DGAIN[11:0] = 400 (hex)

0.5

V/V

Max gain, each channel

(Ga + Gd)

GTMAX

AGAIN[4:0] = 1F(hex)

DGAIN[11:0] = FFF(hex)

19.8

V/V

Min gain, each channel

(Ga + Gd)

GTMIN

AGAIN[4:0] = 0(hex)

DGAIN[11:0] = 400 (hex)

0.3

V/V

Analogue to Digital Converter

Resolution

bits

Speed

MSPS

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