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TL/H/11017

ADC12441 Dynamically-Tested Self-Calibrating 12-Bit

Plus Sign A/D Converter with Sample-and-Hold

November 1994

ADC12441 Dynamically-Tested Self-Calibrating 12-Bit

Plus Sign A/D Converter with Sample-and-Hold

General Description

The ADC12441 is a CMOS 12-bit plus sign successive ap-

proximation analog-to-digital converter whose dynamic

specifications (S/N, THD, etc.) are tested and guaranteed.

On request, the ADC12441 goes through a self-calibration

cycle that adjusts positive linearity and full-scale errors to

less than

(/2 LSB each and zero error to less than

1 LSB. The ADC12441 also has the ability to go through

an Auto-Zero cycle that corrects the zero error during every

conversion.

The analog input to the ADC12441 is tracked and held by

the internal circuitry, and therefore does not require an ex-

ternal sample-and-hold. A unipolar analog input voltage

range (0V to

5V) or a bipolar range (

5V to

5V) can be

accommodated with

5V supplies.

The 13-bit word on the outputs of the ADC12441 gives a 2’s

complement representation of negative numbers. The digi-

tal inputs and outputs are compatible with TTL or CMOS

logic levels.

Features

Self-calibration provides excellent temperature stability

Internal sample-and-hold

Bipolar input range with single

5V reference

Applications

Digital signal processing

Telecommunications

Audio

High resolution process control

Instrumentation

Key Specifications

Resolution 12 bits plus sign

Conversion Time 13.8 ms (max)

Bipolar Signal/Noise 76.5 dB (min)

Total Harmonic Distortion

75 dB (max)

Aperture Time 100 ns

Aperture Jitter 100 ps

rms

Zero Error

1 LSB (max)

Positive Full Scale Error

1 LSB (max)

Power Consumption

5V 70 mW (max)

Sampling rate 55 kHz (max)

TRI-STATE

is a registered trademark of National Semiconductor Corporation.

Simplified Block Diagram

TL/H/11017–1

Connection Diagram

Dual-In-Line Package

TL/H/11017–2

Top View

Order Number

ADC12441CMJ, ADC12441CMJ/883

or ADC12441CIJ

See NS Package Number J28A

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

1 2 3 4 5 6 ... 13 14

Inhaltsverzeichnis

Seite 1 - TL/H/11017–2

TL/H/11017ADC12441 Dynamically-Tested Self-Calibrating 12-BitPlus Sign A/D Converter with Sample-and-HoldNovember 1994ADC12441 Dynamically-Tested Self

Seite 2

1.0 Pin DescriptionsDVCC(28),The digital and analog positive power supplyAVCC(4)pins. The digital and analog power supplyvoltage range of the ADC12441

Seite 3

2.0 Functional Description (Continued)Digital Control InputsA/D FunctionCS WR RD CAL AZßß 1 1 1 Start Conversion without Auto-Zeroß 1 ß 1 1 Read Conve

Seite 4 - AC Electrical Characteristics

3.0 Analog Considerations (Continued)For absolute accuracy, where the analog input varies be-tween very specific voltage limits, the reference pin can

Seite 5 - (Continued)

4.0 Dynamic PerformanceMany applications require the A/D converter to digitize acsignals, but the standard dc integral and differential nonlin-earity

Seite 6 - TL/H/11017–8

ADC12441 Dynamically-Tested Self-Calibrating 12-BitPlus Sign A/D Converter with Sample-and-HoldPhysical Dimensions inches (millimeters)Order Number AD

Seite 7 - TL/H/11017–9

Absolute Maximum Ratings (Notes1&2)If Military/Aerospace specified devices are required,please contact the National Semiconductor SalesOffice/Dist

Seite 8 - Timing Diagrams

Converter Electrical CharacteristicsThe following specifications apply for VCCeDVCCeAVCCea5.0V, Vbeb5.0V, VREFea5.0V, Analog Input SourceImpedancee600

Seite 9 - Timing Diagrams (Continued)

Digital and DC Electrical CharacteristicsThe following specifications apply for DVCCeAVCCea5.0V, Vbeb5.0V, VREFea5.0V, and fCLKe2.0 MHz unlessotherwis

Seite 10 - 2.0 Functional Description

AC Electrical Characteristics (Continued)Note 4: The power dissipation of this device under normal operation should never exceed 169 mW (Quiescent Pow

Seite 11 - Figure 2b

Electrical Characteristics (Continued)TL/H/11017–6FIGURE 1b. Simplified Error Curve vs Output Code without Auto-Cal or Auto-Zero CyclesTL/H/11017–7FIG

Seite 12 - Figure 3

Typical Performance Characteristics (Continued)Linearity Error vs VREFFrequencyLinearity Error vs ClockAmbient TemperatureFull Scale Error Change vsIn

Seite 13 - 4.0 Dynamic Performance

Typical Performance Characteristics (Continued)Bipolar Spectral Responsewith 20 kHz Sine Wave InputTL/H/11017–10Unipolar Spectral Responsewith 20 kHz

Seite 14

Timing Diagrams (Continued)Normal Conversion with Auto-Zero (CALe1, AZe0)TL/H/11017–17Normal Conversion without Auto-Zero (CALe1, AZe1)TL/H/11017–189

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