AD7960

Data Sheet

Rev. 0 | Page 16 of 24

TYPICAL APPLICATIONS

Figure 32 shows an example of a typical connection diagram for

driving the AD7960 using the two single-ended ADA4899-1

devices. The alternative ADC drivers are two single-ended

ADA4897-1 op amps or a differential amplifier ADA4932-1 that

can drive the inputs of the AD7960.

The AD7960 is an ideal fit for high speed multiplexed applica-

tions such as digital X-ray, computed tomography, and infrared

cameras that require superior performance in terms of noise,

power, and throughput, which significantly reduces cost in

these types of applications. The AD7960 has a quiet time

requirement of 90 ns to 110 ns during the conversion, where the

switching of multiplexer inputs (channels) must not occur to

avoid the corruption of conversion. In other words, a delay of

less than 90 ns and greater than 110 ns from the CNV± rising

edge to the multiplexer inputs switching event results in no

corruption. If the analog inputs are multiplexed during this

quiet conversion time, the current conversion may be corrupted

by up to 15 LSBs.

If the analog inputs are multiplexed early enough, the inputs

can slew fast enough to a full-scale signal and settle the input

within the allowed time.

The AD7960 offers extremely low noise floor relative to its full-

scale input. The combination of high throughput rate, low noise

floor, and linearity also makes this part suitable for over-

sampling applications such as spectroscopy, MRI gradient

control, and gas chromatography. The wide dynamic range of

the AD7960 allows accurate measurements of both small and

large signals from multiple channels.

Figure 32. Typical Application Diagram

56pF

20Ω

56pF

20Ω

GND

IN+

IN–

AD7960

VCM

2.5V

AD8031

0.1µF

100Ω

100Ω

100Ω

100Ω

REFIN

VDD1

VDD2

VIO

CNV±

CLK±

D±

DCO±

0.1µF

0.1µF

0.1µF

+5V

+1.8V

+1.8V

ADR4550

+7V

0V TO 5 V

VCM = 2.5V

0V TO 5 V

VCM = 2.5V

+5V

0.1µF

0.1µF

AD8031

0.1µF

0.1µF

GROUND OF THE BOARD. THE REF AND REFIN PINS ARE DECOUPLED REGARDLESS OF EN1 AND EN0 SETTINGS.

ADA4899-1

ADA4899-1