SP7800 Просмотр технического описания (PDF) - Signal Processing Technologies

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SP7800

12-Bit 3µs Sampling A/D Converter

Signal Processing Technologies 

SPECIFICATIONS (continued)

T

A

=

25°C,

Sampling

Frequency,

f,

8

=

333kHz,

V

S

=

+5V,

unless

otherwise

specified.

PARAMETER

MIN . TYP. MAX .

AC ACCURACY

Signal to (Noise + Distortion) Ratio

–J

67

70

–K

69

71.0

Signal to Noise Ratio (SNR)

–J

68

71

–K

70

71.5

SAMPLING DYNAMICS

Aperture Delay

13

Aperture Jitter

150

Transient Response

–J

130

–K

150

Overvoltage Recovery

150

DIGITAL INPUTS

Logic Levels

VIL

VIH

IIL

IIH

DIGITAL OUTPUTS

–0.3

+2.4

–5

+5

+0.8

+5.3

Data Format

Parallel; 12-bit or 8-bit/4-bit

Data Coding

Binary; Offset Binary

VOL

VOH

ILEAKAGE (High-Z State)

DGND

+2.4

POWER SUPPLY REQUIREMENTS

±0.1

+0.4

VDD

±5

Rated Voltage

+4.75 +5.0 +5.25

Current

18

21

Power Consumption

90

ENVIRONMENTAL AND MECHANICAL

Specification

–J, –K

0

+70

Storage

Package

–_N

–_S

–65

+150

24–pin Narrow DIP

24–pin SOIC

UNITS

dB

dB

dB

dB

ns

ps, rms

ns

ns

ns

V

V

µA

µA

V

V

µA

V

mA

mW

°C

°C

CONDITIONS

TMIN ≤ TA ≤ TMAX

fIN = 47kHz

fIN = 47kHz

Note 5

Note 6

TMIN ≤ TA ≤ TMAX

ISINK = 1.6mA

ISOURCE = 1.6mA

VS (VSA and VSD)

IS

NOTES

1.

Adjustable to zero with external potentiometer.

2.

LSB means Least Significant Bit. For SP7800A, 1LSB = 2.44mV for ±5V range, 1 LSB = 4.88mV for

±10V range.

3.

Measured at mid-range, between 4.75 < VS < 5.25 volts.

4.

All specifications in dB are referred to a full-scale input, either ±10V or ±5V.

5.

For full-scale step input, 12-bit accuracy attained in specified time.

6.

Recovers to specified performance in specified time after 2 x FS input overvoltage.

SP7800ADS/02

SP7800A 12-Bit 3µs Sampling A/D Converter

3

© Copyright 2000 Sipex Corporation

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