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DAC1222 Datasheet Binary Multiplying D/A Converter

Manufacturer: National Semiconductor (now Texas Instruments)

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General Description

The DAC1020 and the DAC1220 are respectively 10 and 12-bit binary multiplying digital-to-analog converters A deposited thin film R-2R resistor ladder divides the reference current and provides the circuit with excellent temperature tracking characteristics (0 0002% C linearity error temperature coefficient maximum) The circuit uses CMOS current switches and drive circuitry to achieve low power consumption (30 mW max) and low output leakages (200 nA max) The digital inputs are compatible with DTL TTL logic levels as well as full CMOS logic level swings This part combined with an external amplifier and voltage reference can be used as a standard D A converter however it is also very attractive for multiplying applications (such as digitally controlled gain blocks) since its linearity error is essentially independent of the voltage reference All inputs are protected from damage due to static discharge by diode clamps to V a and ground This part is available with 10-bit (0 05%) 9-bit (0 10%) and 8-bit (0 20%) non-linearity guaranteed over temperature (note 1 of electrical characteristics) The DAC1020 DAC1021 and DAC1022 are direct replacements for the 10bit resolution AD7520 and AD7530 and equivalent to the AD7533 family The DAC1220 and DAC1222 are direct replacements for the 12-bit resolution AD7521 and AD7531 family

Overview

DAC1020 DAC1021 DAC1022 10-Bit Binary Multiplying D A Converter DAC1220 DAC1222 12-Bit Binary Multiplying D A Converter May 1996 DAC1020 DAC1021 DAC1022 10-Bit Binary Multiplying D A Converter DAC1220 DAC1222 12-Bit.

Key Features

  • Y Y Y Y Y Y Y Y Y Y Linearity specified with zero and full-scale adjust only Non-linearity guaranteed over temperature Integrated thin film on CMOS structure 10-bit or 12-bit resolution Low power dissipation 10 mW 15V typ Accepts variable or fixed reference b25VsVREFs25V 4-quadrant multiplying capability Interfaces directly with DTL TTL and CMOS Fast settling time 500 ns typ Low feedthrough error LSB 100 kHz typ Equivalent Circuit Note Switches shown in digital high state TL H 5689.

More Datasheets from National Semiconductor (now Texas Instruments)

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