WM2638CD datasheet(3/11 Pages) WOLFSON

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WM2638

Production Data

WOLFSON MICROELECTRONICS LTD

PD Rev 1.0 July 99

ELECTRICAL CHARACTERISTICS

Test Conditions:

RL = 10k

Ω, C

L = 100pF. VDD = 5V

± 10%, V

REF = 2.048V and VDD = 3V

± 10%, V

REF = 1.024V over recommended operating free-air

temperature range (unless noted otherwise)

PARAMETER

SYMBO

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Static DAC Specifications

Resolution

bits

Integral non-linearity

INL

See Note 1

±2.0

±4.0

LSB

Differential non-linearity

DNL

See Note 2

±0.4

±1

LSB

Zero code error

ZCE

See Note 3

±24

Gain error

See Note 4

±0.6

% FSR

D.c. power supply rejection ratio

DC PSRR

See Note 5

0.5

mV/V

Zero code error temperature coefficient

See Note 6

ppm/

°C

Gain error temperature coefficient

See Note 6

ppm/

°C

DAC Output Specifications

Output voltage range

VDD - 0.4

Output load regulation

Ω to 10kΩ load

See Note 7

±0.1

±0.25

Power Supplies

Active supply current

IDD

No load, VIH = VDD, VIL = 0V

VDD = 5V, VREF = 2.048V, Internal

Slow

Fast

VDD = 5V, VREF = 2.048V, External

Slow

Fast

VDD = 3V, VREF = 1.024V, Internal

Slow

Fast

VDD = 3V, VREF = 1.024V, External

Slow

Fast

See Note 8

2.2

4.3

1.8

3.9

1.8

3.8

1.5

3.5

2.7

5.2

2.2

4.8

2.3

4.7

1.9

4.3

Power down supply current

No load,

all digital inputs 0V or VDD,

See Note 9

0.01

µA

Dynamic DAC Specifications

Slew rate

DAC code 32 to 4095, 10%-90%

Slow

Fast

See Note 10

1.5

8.0

µs

Settling time

DAC code 32 to 4095

Slow

Fast

See Note 11

3.5

1.0

µs

Glitch energy

Code 2047 to 2048

nV-s

Signal to noise ratio

SNR

fs = 400ksps, fOUT = 1kHz,

BW = 20kHz

See Note 12

Signal to noise and distortion ratio

SNRD

fs = 400ksps, fOUT = 1kHz,

BW = 20kHz

See Note 12

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