AD5765| Datasheet

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Preliminary Technical Data
FEATURES

Complete Quad, 16-Bit, High Accuracy, Serial Input, 5V DACs AD5765
GENERAL DESCRIPTION
The AD5765 is a quad, 16-bit, serial input, bipolar voltage output digital-to-analog converter that operates from supply voltages of 4.75 V up to 5.25 V. Nominal full-scale output range is 4.096 V. The AD5765 provides integrated output amplifiers, reference buffers and proprietary power-up/powerdown control circuitry. The part also features a digital I/O port, which is programmed via the serial interface. The parts incorporate digital offset and gain adjust registers per channel. The AD5765 is a high performance converter that offers guaranteed monotonicity, integral nonlinearity (INL) of 1 LSB, low noise, and 10 us settling time. During power-up (when the supply voltages are changing), the outputs are clamped to 0 V via a low impedance path. The AD5765 uses a serial interface that operates at clock rates of up to 30 MHz and is compatible with DSP and microcontroller interface standards. Double buffering allows the simultaneous updating of all DACs. The input coding is programmable to either twos complem
ent or offset binary formats. The asynchronous clear function clears all DAC registers to either bipolar zero or zero scale depending on the coding used. The AD5765 is ideal for both closed-loop servo control and open-loop control applications. The AD5765 is available in a 32-lead TQFP, and offers guaranteed specifications over the -40 C to +105 C industrial temperature range. See Figure 1, the functional block diagram. Table 1. Related Devices
Part No. AD5764 AD5763 Description Complete quad, 16-bit, high accuracy, serial input, 10V output DAC Complete dual, 16-bit, high accuracy, serial input, 5V DAC

Complete quad, 16-bit digital-to-analog converters (DACs) Programmable output range: 4.096 V, 4.201 V, or 4.311 V 1 LSB maximum INL error, 1 LSB maximum DNL error Low noise: 60 nV/Hz Settling time: 10 us maximum Integrated reference buffers On-chip die temperature sensor Output control during power-up/brownout Programmable short-circuit protection Simultaneous updating via LDAC Asynchronous CLR to zero code Digital offset and gain adjust Logic output control pins DSP-/microcontroller-compatible serial interface Temperature range: -40 C to +105 C iCMOS process technology1

APPLICATIONS
Industrial automation Open-/closed-loop servo control Process control Data acquisition systems Automatic test equipment Automotive test and measurement High accuracy instrumentation

For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher voltage levels, iCMOS is a technology platform that enables the development of analog ICs capable of 30 V and operating at 15 V supplies, allowing dramatic reductions in power consumption and package size, and increased ac and dc performance.

Rev. PrA
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