AD7570J View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

AD7570J

CMOS 10-Bit Monolithic A/D Converter

Analog Devices 

TERMINOLOGY

Resolution

Resolution is the relative value of the LSB, or Z-n for binary

devices, for n-bit converters. It may be expressed as 1 part in

Zn, as a percentage, in parts-per-million, or simply by "n bits."

Relative Accuracy

Relative accuracy error is the difference between the nominal

and actUal ratios to full scale of the analog value corresponding

to a given digital input, independently of the full-scale calibra-

tion. This error is a function of the linearity of the converter,

and is usually specified at less than :!:l/2LSB.

Gain Error

Differential Nonlinearity

In a converter, differential linearity error describes the variation

in the analog value of transitions between adjacent pairs of

digital numbers, over the full range of the digital input or

4

output. If each transition is equal to its neighbors (i.e., 1LSB),

the differential nonlinearity is zero. If a transition differs

from one of its neighbors by more than 1LSB (e.g., if, at the

transition OIl. .11 to 100. . .00, the MSB is low by 1.1LSB),

a DI A converter can be non-monotonic, or an AID converter

using it may miss one or more codes. A sp,ecified maximum

differential nonlinearity of 1 LSB ensures that monotonic

behavior exists.

The "gain" of a converter is that analog scale factor setting

Output Leakage Current

that establishes the nominal conversion relationship, e.g., lOV

Current which appears at the OUT1 terminal when all digital

full scale. It is adjusted either by setting the feedback resistor

output (DBO through DB9) are LOW, or on the OUTZ terminal

of a DAC, the input resistor in a current-comparing

the reference (voltage or current).

ADC, or

when all digital outputs are HIGH. The effect of output leakage

current will be on the offset of the AID converter.

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

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1143184[35193251061'

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0.606 [1541

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0.065 [1.661

0.02 10.5081

0105 [2671

0125 1318}

0.045 [1151

0015 [0381}

0.095 12.42}

LEAD NO 1 IDENTIFIED BY DOT OR NOTCH

LEADS ARE GOLD PLATED [50 MICROINCHES MIN[ KOVAR OR ALLOY 42

28 Pin Ceramic Dip

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