Analog Devices Inc. AD1856RZ

Description
The AD1856 is a 16-bit pulse code modulation (PCM) audio DAC. It features a voltage output amplifier, 16-bit DAC, 16-bit serial-to-parallel input register, and voltage reference. The digital portion is fabricated with CMOS logic elements, while the analog portion is fabricated with bipolar and MOS devices, as well as thin film resistors. Laser trimming of the linearity error affords extremely low total harmonic distortion. An optional linearity trim pin is provided to allow residual differential linearity error at midscale to be eliminated. The output amplifier achieves fast settling and high slew rates, providing a full ±3 V signal at load currents of up to ±8 mA. The output amplifier is short-circuit protected and can withstand indefinite shorts to ground. The serial input interface consists of the clock, data, and latch enable pins. The serial twos complement data-word is clocked into the DAC, MSB first, by the external data clock. The latch enable signal transfers the input word from the internal serial input register to the parallel DAC input register. The input clock can support a 10 MHz clock rate. The serial input port is compatible with popular digital filter chips used in consumer audio products. The AD1856 can operate with ±5 V to 12V power supplies, making it suitable for both the portable and home-use markets. The digital supplies, V₁ and -V, can be separated from the analog supplies, Vs and -Vs, for reduced digital crosstalk. Separate analog and digital ground pins are also provided. Power dissipation is 110 mW (typical) with ±5 V supplies and 135 mW (typical) when 12 V supplies are used. The AD1856 is packaged in a 16-lead plastic SOIC package and incorporates the industry-standard pinout. Operation is guaranteed over the temperature range of -25°C to 70°C and over the voltage supply range of ±4.75 V to ±13.2 V.

Features
Total harmonic distortion is 100% tested.
MSB trim feature allows superlinear operation.
Operates with ±5 V to 12 V supplies.
Serial interface is compatible with digital filter chips.
1.5 μs settling time permits 2x, 4x, and 8x oversampling.
No external components are required.
96 dB dynamic range.
13 V or ±18 mA output capability.
16-bit resolution.
Twos complement serial input words.
Low cost.
16-lead plastic SOIC package.

Applications
Compact disc players
Digital audio amplifiers
DAT recorders and players
Synthesizers and keyboards