Features
- Lincarity specified with zero and full scale adjust only
- Non-linearity quarantced over temperatureIntegrated thin film on CMOS structure
- 10-bit or 12 bit resolution
- Low power dissipation 10 mW @15V typ
- Accepts variable or fixed reference -25V
- 4 quadrant multiplying capability
- Interfaces directly with DTL TTL and CMOS
- fast settling time 500 ns typLow feedthrough error l LSB @100 kHz typ
General DescriptionThe DAC1020 and the DAC1220 are, respectively, 10 and12 bit binary multiplying digital to ana-logca converters. A deposited thin film R 2R resistor ladder divides the referencccurrent and provides the circuit with excellent temperaturctracking characteristics (0.0002%C linearity error temperature coefficient maximum). The circuit uses CMOS currentswitches 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/1 TL logic levelsas well as full CMOS logic level swings. This part, combinedwith an external amplifier and voltage reference, can beused as a standard D/A converter, however, it is also verattractive for multiplying applications (such as digitally controlled gain blocks) since its lincarity error is essentially independent of the voltage reference. All inputs are protectedfrom damage due to static discharge by diode clamps to V iand ground.
This part is available with 10 bit (0.05%), 9 bit (0.10%), and8 bit (0.209%) non-linearity quaranteed over temperaturc
(note 1 of electrical characteristics).
The DAC1020DAC1021 and AC1022 are direct replacements for the 10bit resolution AD7520 and AD7530 and equivalent to theD7533 family. The DAC1220 and DAC1222 are direct replacements for the 12 bit resolution AD7521 and AD7531family.
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