HA17008RP Datasheet | Hitachi Semiconductor

Description The HA17008R series are 8-bit monolithic D/A converters which have built in, a reference current amplifier, an R-2R ladder resistor, and 8 high speed current switches. By setting the reference voltage and resistance, the maximum output current can be freely varied in response to the application. The reference current is distributed to the current value for each bit by the R-2R ladder resistor, and the maximum output current is 255/256 of the reference current. For example, if the input reference current is 2.0 m A, then the maximum available output current is 1.992 m A. Applications for the HA17008R are wide ranging, and include CRT displays, stepping motor control, programmable power supplies, audio equipment, and attenuators. Features - - - - - - Linearity of ±0.19% (±1/2 LSB) guaranteed. The settling time is short, 85 ns (typ), enabling rapid conversions. Low power dissipation has been reduced: 135 m W typ. patible with TTL and CMOS logic. The standard supply voltage is VCC = +15.0 V, VEE = - 15.0 V. A wide output voltage range can be provided. From - 10 V to +18 V. Ordering Information Type No. HA17008RP HA17008RFP Package DP-16 FP-16DA HA17008RP/RFP Pin Arrangement Threshold control IO VEE IO (MSB) A1 A2 A3 A4 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 pensation VREF(- ) VREF(+) VCC A 8 (LSB) A7 A6 A5 (Top View) Block Diagram MSB A1 5 LSB A8 12 4 Current switches 2 IO IO A2 6 A3 7 A4 8 A5 9 A6 10 A7 11 THC 1 R-2R ladder resistor Bias circuit VREF (+) 14 VREF (- ) 15 Ref. current amp. 3 VEE 13 16 VCC pensation HA17008RP/RFP Functions Reference differential amplifier and phase pensation The reference amplifier is a circuit which converts the reference voltage applied to pin 14 through the external resistor R14 from a voltage to a current. The converted current is supplied to each bit by a current mirror and the ladder resistor. Note that this should be used with the polarity of the current flowing in to pin 14. The reference voltage source...