16-Bit, 100 kSPS, Single-Ended

PulSAR ADC in MSOP/QFN

AD7683

Rev. A

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FEATURES

16-bit resolution with no missing codes

Throughput: 100 kSPS

INL: ±1 LSB typical, ±3 LSB maximum

Pseudo differential analog input range

Single-supply operation: 2.7 V to 5.5 V

Serial interface SPI/QSPI/MICROWIRE/DSP compatible

Power dissipation: 4 mW @ 5 V, 1.5 mW @ 2.7 V,

150 μW @ 2.7 V/10 kSPS

Standby current: 1 nA

8-lead packages:

MSOP

3 mm × 3 mm QFN (LFCSP) (SOT-23 size)

Improved second source to ADS8320 and ADS8325

APPLICATIONS

Battery-powered equipment

Data acquisition

Instrumentation

Medical instruments

Process control

APPLICATION DIAGRAM

AD7683

REF

GND

VDD

+IN

–IN

DCLOCK

CS

3-WIRE SPI

INTERFACE

0.5V TO VDD 2.7V TO 5.5V

Figure 1.

Table 1. MSOP, QFN (LFCSP)/SOT-23, 14-/16-/18-Bit

PulSAR ADC

Type

100

kSPS

250

kSPS

400 kSPS

to

500 kSPS

≥1000

kSPS

ADC

Driver

18-Bit True

Differential

AD7691

AD7690

AD7982

AD7984

ADA4941

ADA4841

16-Bit True

Differential

AD7684

AD7687

AD7688

AD7693

ADA4941

ADA4841

16-Bit Pseudo

Differential

AD7680

AD7683

AD7685

AD7694

AD7686

AD7980

ADA4841

14-Bit Pseudo

Differential

AD7940

AD7942

AD7946

ADA4841

GENERAL DESCRIPTION

The AD7683 is a 16-bit, charge redistribution, successive

approximation, PulSAR® analog-to-digital converter (ADC)

that operates from a single power supply, VDD, between 2.7 V

and 5.5 V. It contains a low power, high speed, 16-bit sampling

ADC with no missing codes (B grade), an internal conversion

clock, and a serial, SPI-compatible interface port. The part also

contains a low noise, wide bandwidth, short aperture delay,

track-and-hold circuit. On the CS falling edge, it samples an

analog input, +IN, between 0 V to REF with respect to a ground

sense, –IN. The reference voltage, REF, is applied externally and

can be set up to the supply voltage. Its power scales linearly with

throughput.

The AD7683 is housed in an 8-lead MSOP or an 8-lead QFN

(LFCSP) package, with an operating temperature specified from

−40°C to +85°C.