MP8820AS datasheet(3/12 Pages) EXAR

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MP8820

Rev. 1.00

ELECTRICAL CHARACTERISTICS TABLE FOR DUAL SUPPLIES

Unless Otherwise Noted: VDD = 5 V, GND = 0 V, VREF(+) = 1.5 V, VREF(–) = 0 V, VMID = 2.5 V.

°C

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions/Comments

DC CHARACTERISTICS

Resolution

Bits

Differential Non-Linearity

DNL

–1

+1/4

LSB

Differential Non-Linearity2

DNL

–1

+1/2

LSB

@ VREF(+) – VREF(–) = 0.5 V

Integral Non-Linearity7

INL

–1

+1/2

LSB

Integral Non-Linearity4, 7

INL

–1

+1/2

LSB

@ VREF(+) – VREF(–) = 0.5 V

Monotonicity

Guaranteed

Bipolar Zero Error

BZE

–25

Offset is measured as the bipolar

zero code transition,

01111111 to 10000000, relative to

VMID

Zero Scale Drift2, 5

ZSD

µV/°C

Full Scale Error

%FS

This is a measure of the

VMID to VRT

+FSE

–5.0

2.5

5.0

internal reference

VMID to VRB

–FSE

–5.0

2.5

5.0

translation. Ideally

VRT – VMID = VMID – VRB =

VREF(+) – VREF(–)

Full Scale Drift2, 6

FSD

0.025

%FS/

°C

DC Input Range1

VINp-p

Vpp

The analog input is specified as

Vpp centered around VMID

Aperture Delay

tAP

From rising edge of WR

Input Capacitance

CIN

Measured with VIN – DC = 2.5 V

and WR = low

REFERENCE VOLTAGES

Positive Reference Input Voltage

VREF(+)

0.5

1.5

Reference voltage with respect to

VREF(–)

VREF(+) Input Resistance

RVR+

Ω

Internal Reference Settling Time

VRSTL

500

Settling time required for ADC to

make a proper conversion after

(VREF(+) – VREF(–)) has changed

Negative Reference Input Voltage

VREF(–)

0VREF(+) –0.5

VREF(–) Input Resistance

RVR–

Ω

VMID Input Current

IVM

0mA

VMID Range

VMID

2.5

VMID < VDD –0.5 –

[VREF(+) – VREF(–)]

VMID < VSS +0.5 +

[VREF(–) – VREF(–)]

POWER SUPPLIES

All GNDs are Chip Substrate

Positive Supply

VDD

4.75

5.25

Negative Supply

GND

Power Supply Rejection Ratio2

PSRR

–48

f = 1 kHz. Not tested.

Supply Current

IDD

DIGITAL CHARACTERISTICS3, 4

Digital Input High Voltage

VIH

Digital Input Low Voltage

VIL

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