16-Bit, 2 LSB INL, 3 MSPS PulSAR ADC

The AD7621 is a 16-bit, 3 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 16-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Wideband Warp) for undersampling applications and, for asynchronous conversion rate applications, a fast mode (Normal) and, for low power applications, a reduced power mode (Impulse) where the power is scaled with the throughput. Operation is specified from −40°C to +85°C.

It is available in a 48-lead LQFP or a 48-lead LFCSP with operation specified from –40°C to +85°C.

PRODUCT HIGHLIGHTS

* Fast Throughput.

The AD7621 is a 3 MSPS, charge redistribution,

16-bit SAR ADC.

* Superior Linearity.

The AD7621 has no missing 16-bit code.

* Internal Reference.

The AD7621 has a 2.048 V internal reference with a

typical drift of ±7 ppm/°C.

* Single-Supply Operation.

The AD7621 operates from a 2.5 V single supply and

typically dissipates 65 mW. In impulse mode, its power

dissipation decreases with the throughput.

* Serial or Parallel Interface.

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

arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.

APPLICATIONS

* Medical instruments

* High speed data acquisition

* Digital signal processing

* Communications

* Instrumentation

* Spectrum analysis

* ATE

* 16 Bits Resolution with No Missing Codes

* On-board Low Drift Reference with Buffer and Temperature Sensor

* Differential Input Range: ±VREF (VREF up to 2.5V)

* Throughput:

3 MSPS (Wideband Warp and Warp Mode)

2 MSPS (Normal Mode)

1.25 MSPS (Impulse Mode)

* INL ±2 LSB Max (±30 ppm of FS)