16-Bit Bipolar 250 kSPS PulSAR CMOS ADC

Based on the Pulsar core, the AD7663 is a bipolar 16-bit, 250 kSPS, charge redistribution SAR Analog-to-Digital Converter that operates from a single 5 V power supply. It contains a high-speed 16-Bit sampling ADC, a resistor input scalar that allows various input ranges, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.

The AD7663 is hardware factory-calibrated and is comprehensively tested to ensure such ac parameters as signal-to-noise ratio (SNR) and total harmonic distortion (THD), in addition to the more traditional dc parameters of gain, offset, and linearity.

It is fabricated using Analog Devices’ high performance, 0.6 micron CMOS process and is available in a 48-lead LQFP and a tiny 48-lead LFCSP with operation specified from –40°C to +85°C.

PRODUCT HIGHLIGHTS

* Fast Throughput

The AD7663 is a 250 kSPS charge redistribution, 16-bit

SAR ADC with various bipolar and unipolar input ranges.

* Single-Supply Operation

The AD7663 operates from a single 5 V supply and dissipates

only 35 mW typical. Its power dissipation decreases with

the throughput to, for instance, only 15 µW at a 100 SPS

throughput. It consumes 7 µW maximum when in power-down.

* Superior INL

The AD7663 has a maximum integral nonlinearity of 3 LSB

with no missing 16-bit code.

* Serial or Parallel Interface

Versatile parallel (8 bits or 16 bits) or 2-wire serial interface

arrangement compatible with both 3 V or 5 V logic.

APPLICATIONS

* Data Acquisition

* Motor Control

* Communication

* Instrumentation

* Spectrum Analysis

* Medical Instruments

* Process Control

* Throughput: 250 kSPS

* INL: ±3 LSB Max (±0.0046% of Full Scale)

* 16-Bit Resolution with No Missing Codes

* S/(N+D): 90 dB Typ @ 100 kHz

* THD: –100 dB Typ @ 100 kHz

* Analog Input Voltage Ranges

Bipolar: ±10 V, ±5 V, ±2.5 V

Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V