HA17408P 8-Bit Multiplying Digital-to-Analog Converter Description The HA17408P is an 8-bit monolithic D/A converter that incorporates a reference current amplifier, an R-2R resistor ladder, and eight high-speed current switches. Circuit designers can set the maximum output current to match the needs of their applications by setting the reference voltage and selecting a resistor value. The reference current is distributed to the current value for each bit by the R-2R resistor ladder, and thus the maximum output current is 255/256 times the reference current. For example, the largest output current that can be acquired for a reference input current of 2.0 mA is 1.992 mA. The HA17408P can be used in a wide range of applications including CRT displays, stepping motor control, programmable power supplies, audio equipment, and attenuators. Features • A linearity of ±0.19% (± 1/2 LSB) is guaranteed. • Short centering time (250 ns typical) for rapid conversions • Low power dissipation: 157 mW typical • Compatible with TTL and CMOS logic • Standard supply voltages of VCC = +5.0 V, VEE = –5.0 V and = –15.0 V • Wide output voltage range: +0.5 to –5.0 V 475 HA17408P Pin Arrangement Block Diagram 476 HA17408P Absolute Maximum Ratings (Ta = 25°C) Item Symbol Rated Value Unit Power-supply voltage VCC 5.5 V VEE –16.5 V Digital input voltage V5 to V12 0 to +5.5 V Output voltage VO 0.5 to –5.2 V Reference current I14 5.0 mA Reference amplifier input voltage range VREF VCC, VEE V Allowable power dissipation PT 625 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +125 °C Electrical Characteristics (VCC = 5.0 V, VEE = –15 V, Iref = 2 mA, Ta = 25°C) Item Symbol Min Typ Max Unit Relative error ER — — ±0.19 %FS Settling time (± 1/2 LSB) ts — 250 — ns Transmission delay time tPLH , tPHL — 30 100 ns Maximum output current drift TCIO — ±20 — ppm/°C Digital input level VIH 2.0 — — V Test Condition All bits OFF → ON VIL — — 0.8 V Digital input current IIH — 0 0.04 mA VIH = 5.0 V IIL –0.8 –0.002 — mA VIL = 0.8 V Reference input bias current I15 –3.0 –1.0 — µA Output current range IOR 0 2.0 2.1 mA VEE = –5.0 V 0 2.0 4.2 mA VEE = –7.0 to –15 V Output current IO 1.9 1.99 2.1 mA Vref = 2.000 V, R 14 = 1.000 IO (min) — 0 4.0 µA All bits low Output voltage range VO –0.6 — +0.5 V VEE = –5 V –5.0 — +0.5 V VEE < –10 V Reference current slew rate STIref — 4.0 — mA/µs 477 HA17408P Electrical Characteristics (VCC = 5.0 V, VEE = –15 V, Iref = 2 mA, Ta = 25°C) (cont) Item Symbol Min Typ Max Unit Current drain ICC — 1.9 14 mA IEE –13 –5.8 — mA Power-supply voltage VCC 4.5 5.0 5.5 V VEE –16.5 –15 –4.5 V Power dissipation PT — 34 136 mW — 97 265 mW — 34 — mW — 97 — mW Settling Time Test Circuit 478 Test Condition All bits low VEE = –5.0 V All bits high VEE = –5.0 V VEE = –15 V VEE = –15 V