16-Bit, 1 MSPS PulSAR Unipolar ADC with Ref

The AD7667 is a 16-bit, 1 MSPS, 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. It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous applications, and a reduced power mode (Impulse) for low power applications where power is scaled with the throughput. The AD7667 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. Operation is specified from –40°C to +85°C.

PRODUCT HIGHLIGHTS

* Fast Throughput.

The AD7667 is a 1 MSPS, charge redistribution, 16-bit SAR

ADC with internal error correction circuitry.

* Superior INL.

The AD7667 has a maximum integral nonlinearity of

2.0 LSBs with no missing 16-bit codes.

* Internal Reference.

The AD7667 has an internal reference with a typical

temperature drift of 3 ppm/°C.

* Single-Supply Operation.

The AD7667 operates from a single 5 V supply. In Impulse

mode, 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

* Instrumentation

* Digital Signal Processing

* Spectrum Analysis

* Medical Instruments

* Battery-Powered Systems

* Process Control

* 2.5 V Internal Reference: Typical Drift 3 ppm/ºC

* Throughput:

1 MSPS (Warp Mode)

800 kSPS (Normal Mode)

666 kSPS (Impulse Mode)

* 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