GENERAL DESCRIPTION

The AD7960 is an 18-bit, 5 MSPS, charge redistribution successive approximation (SAR), analog-to-digital converter (ADC). The SAR architecture allows unmatched performance both in noise and in linearity. The AD7960 contains a low power, high speed, 18-bit sampling ADC, an internal conversion clock, and an internal reference buffer. On the CNV± edge, the AD7960 samples the voltage difference between the IN+ and IN− pins.

FEATURES

Throughput: 5 MSPS

18-bit resolution with no missing codes

Excellent ac and dc performance

Dynamic range: 100 dB

SNR: 99 dB

THD: −117 dB

INL: ±0.8 LSB (typical), ±2 LSB (maximum)

DNL: ±0.5 LSB (typical), ±0.99 LSB (maximum)

True differential analog input voltage range: ±4.096 V or ±5 V

Low power dissipation

46.5 mW at 5 MSPS with external reference buffer

(echoed clock mode)

64.5 mW at 5 MSPS with internal reference buffer

(echoed clock mode)

39 mW at 5 MSPS with external reference buffer

(self clocked mode, CNV± in CMOS mode)

SAR architecture

No latency/pipeline delay

External reference options: 2.048 V buffered to 4.096 V (internal

reference buffer), 4.096 V, and 5 V

Serial LVDS interface

Self clocked mode

Echoed clock mode

LVDS or CMOS option for conversion control (CNV± signal)

Operating temperature range of −40°C to +85°C

32-lead, 5 mm × 5 mm LFCSP (QFN)

APPLICATIONS

Digital imaging systems

Digital X-rays

Computed tomography

IR cameras

MRI gradient control

High speed data acquisition

Spectroscopy

Test equipment