16-Bit 100 kSPS CMOS Successive Approximation PulSAR® ADC with No Missing Codes

The AD7660 is a 16-bit, 100 kSPS, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. The part contains an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.

The AD7660 is hardware factory-calibrated and is comprehensively tested to ensure ac parameters such 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 with correspondingly low cost 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 AD7660 is a 100 kSPS, charge redistribution, 16-bit

SAR ADC with internal error correction circuitry.

* Superior INL

The AD7660 has a maximum integral nonlinearity of 3 LSBs

with no missing 16-bit code.

* Single-supply operation

The AD7660 operates from a single 5 V supply and only

dissipates 21 µW typical. Its power dissipation decreases

with the throughput to, for instance, only 21 µW at a 100 SPS

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

* Serial or parallel interface

Versatile parallel or 2-wire serial interface arrangement compatible

with both 3 V or 5 V logic.

APPLICATIONS

* Data acquisition

* Battery-powered systems

* PCMCIA

* Instrumentation

* Automatic test equipment

* Scanners

* Medical instruments

* Process control

* Throughput: 100 kSPS

* INL: 3 LSB max (0.0046% of full-scale)

* 16-bit resolution with no missing codes

* S/(N+D): 87 dB min at 10 kHz, 90 dB typ at 45 kHz

* THD: –96 dB max at 10 kHz

* Analog input voltage range: 0 V to 2.5 V

* Both AC and DC specifications

* No pipeline delay