16-Bit, 500 kSPS PulSAR Unipolar ADC with Ref

The AD7666 is a 16-bit, 500 kSPS, charge redistribution SAR analog-to-digital converter that operates from a single 5 V power supply. The part contains a high speed, 16-bit sampling ADC, an internal conversion clock, internal reference, error correction circuits, and both serial and parallel system interface ports. The AD7666 is hardware factory-calibrated and 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.

The AD7666 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 AD7666 is a 500 kSPS, charge redistribution, 16-bit

SAR ADC with internal error correction circuitry.

* Superior INL.

The AD7666 has a maximum integral nonlinearity of

2.0 LSB with no missing 16-bit codes.

* Internal Reference.

The AD7666 has an internal reference with a typical

temperature drift of 3 ppm/°C.

* Single-Supply Operation.

The AD7666 operates from a single 5 V supply. Its power

dissipation decreases with throughput.

* Serial or Parallel Interface.

Versatile parallel or 2-wire serial interface arrangement is

compatible with both 3 V and 5 V logic.

APPLICATIONS

* Data acquisition

* Medical instruments

* Digital signal processing

* Spectrum analysis

* Instrumentation

* Battery-powered systems

* Process control

* 2.5 V Internal Reference:

Typical Drift 3 ppm/ºC Guaranteed Max Drift 15 ppm/ºC

* Throughput: 500 kSPS

* INL: ±2.5 LSB Max (±0.0038% of Full Scale)

* 16 Bits Resolution with No Missing Codes

* S/(N+D): 88 dB max @ 20 kHz

* THD: -96 dB max @ 20 kHz

* Analog Input Voltage Range: 0 V to 2.5 V

* No Pipeline Delay

* SPI®/QSPI™/MICROWIRE™/DSP Compatible