DAC1020 Datasheet | National Semiconductor

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 m W max) and low output leakages (200 n A max) The digital inputs are patible with DTL TTL logic levels as well as full CMOS logic level swings This part bined 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 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 m W 15V typ Accepts variable or fixed reference b25Vs VREFs25V 4-quadrant multiplying capability Interfaces directly with DTL TTL and CMOS Fast settling time 500 ns typ Low feedthrough error LSB 100 k Hz typ Equivalent Circuit Note Switches shown in digital high state TL H 5689 - 1 Ordering Information Temperature Range Non Linearity 0 05% 0 10% 0 20% Package Outline Temperature Range Non Linearity 0 05% 0 20% DAC1220LCN DAC1222LCN...