SP8538 Просмотр технического описания (PDF) - Signal Processing Technologies

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SP8538

Micropower Sampling 12-Bit A/D Converter

Signal Processing Technologies 

SPECIFICATIONS (cont.)

Unless otherwise noted the following specifications apply for VCC=5V or 3.3V with limits applicable for Tmin to Tmax. Typical applies for Ta=25˚C.

VCC=5.0V

VCC=3.3V

PARAMETERS

MIN. TYP. MAX. MIN. TYP. MAX. UNITS CONDITIONS

DIGITAL INPUTS

Input Low Voltage, VIL

Input High Voltage, VIH

Input Current IIN

Input Capacitance

0.8

0.8 Volts

2.0

2.0

Volts

+2.0

+2.0 µA

3.0

3.0

pF

VDD=5V +5%

VDD=5V +5%

DIGITAL OUTPUTS

Data Format

Data Coding

VOH

VOL

AC ACCURACY

Spurious free Dynamic

Range (SFDR)

4.0

2.0

Volts

0.4

0.4 Volts

86

86

dB

Total Harmonic Distortion (THD)

-83

Signal to Noise &

73

Distortion (SINAD)

Signal to Noise (SNR)

73.5

-80

dB

72

dB

72.5

dB

See Timing Diagram

VDD=5V +5%, IOH=-0.4mA

VDD=5V +5%, IOH=+1.6mA

For all FFT’s

(Full Differential Mode)

If VCC = 5V

fsample = 25kHz

fin = 12kHz

If VCC = 3.3V

fsample = 5.8kHz

fin = 2.8kHz

SAMPLING DYNAMICS

Acquisition Time to 0.01%

2 3.38

3 15.0 µs

-3dB Small Signal BW

5

Aperture Delay

20

Aperture Jitter

150

Common-Mode Rejection Ratio 70 80

4

30

150

70 80

MHz

nS

pS

dB

fCM = 12.5kHz @ 5 volts

2.8kHz @ 3.3 volts

POWER SUPPLIES

VCC

Volts

+3.0 +5.0 +5.5 +3.0 +3.3 +5.5

Supply Current Operation Mode

250 400

150 300 µA

Shutdown Mode

Power Dissipation

Operating Mode

Shutdown Mode

0.001 0.5

1.25 2

2.5

0.001 0.5 µA

0.5 0.99 mW

1.7 µW

(CS=0) 25kHz, 5 volt conversion

rate. 5.8kHz 3.3 volts

(CS=1)

TEMPERATURE RANGE

Commercial

Industrial

Storage

0˚ to +70˚C

-40˚ to +85˚C

-65˚ to +150˚C

0˚ to +70˚C ˚C

-40˚ to +85˚C ˚C

-65˚ to +150˚C ˚C

SP8538DS/01

SP8538 Micropower Sampling 12-Bit A/D Converter

3

© Copyright 1999 Sipex Corporation

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