WM8181 查看數據表（PDF） - Wolfson Microelectronics plc

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WM8181

12-bit 2MSPS Serial Output CIS/CCD Digitiser

Wolfson Microelectronics plc 

WM8181

Advanced Information

ELECTRICAL CHARACTERISTICS

TEST CHARACTERISTICS

AVDD = DVDD = 2.97 to 3.63V and 4.5 to 5.5V, AGND1 = AGND2 = DGND = 0V, TA = 0 to 70°C, MCLK = 24MHz

unless otherwise stated.

PARAMETER

SYMBOL

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

ANALOGUE SPECIFICATION

12-bit ADC including Sample and Hold. No Missing Codes Guaranteed.

Maximum sample rate

MCLK:VSMP ratio = 12:1

2

MSPS

Input signal voltage for

ADC full-scale (internal

reference control)

VINP-VINM

1.5

V

Input signal voltage for

ADC full-scale (external

reference control)

VINP-VINM

VREFIN

V

Input signal voltage for

ADC zero-scale (internal

reference control)

VINP-VINM

0

V

Input signal voltage for

ADC zero-scale (external

reference control)

VINP-VINM

0

V

Differential non-linearity

DNL

0.5

LSB

Integral non-linearity

INL

1.5

LSB

Analogue Inputs

Input voltage limits

VINP, VINM

0

AVDD

V

References: VRT, VRB

VRT (internal reference control)

AVDD = 5V

2.85

V

AVDD = 3.3V

1.70

V

VRB (internal reference control)

AVDD = 5V

1.35

V

AVDD = 3.3V

0.95

V

VRT (external reference control)

AVDD = 5V

2.10 +

V

VREFIN/2

AVDD = 3.3V

1.35 +

V

VREFIN/4

VRB (external reference control)

AVDD = 5V

2.10 -

V

VREFIN/2

AVDD = 3.3V

1.35 -

VREFIN/4

VRT, VRB output leakage

Power down

<1

µA

Clamp

VINM to VINP leakage

CLAMP low

<1

µA

VINM to VINP resistance

CLAMP high, AVDD = 3.3V

50

Ω

VINP = VINM = 2V

VINM to VINP resistance

CLAMP high, AVDD = 5V

30

Ω

VINP = VINM = 1.4V

WOLFSON MICROELECTRONICS LTD

AI Rev 3.0 January 2000

4

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