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Data Sheet

AD7767

GENERAL DESCRIPTION

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Rev. D | 3 of 23

The AD7767/AD7767-1/AD7767-2 are high performance, 24-bit,

oversampled SAR analog-to-digital converters (ADCs). The

AD7767/AD7767-1/AD7767-2 combine the benefits of a large dy-

namic range and input bandwidth, consuming 15 mW, 10.5 mW,

and 8.5 mW power, respectively, and are contained in a 16-lead

TSSOP package.

Ideal for ultralow power data acquisition (such as PCI- and USB-

based systems), the AD7767/AD7767-1/AD7767-2 provide 24-bit

resolution. The combination of exceptional SNR, wide dynamic

range, and outstanding dc accuracy make the AD7767/AD7767-1/

AD7767-2 ideally suited for measuring small signal changes over

a wide dynamic range. This is particularly suitable for applications

where small changes on the input are measured on larger ac or dc

signals. In such an application, the AD7767/AD7767-1/AD7767-2

accurately gather both ac and dc information.

The AD7767/AD7767-1/AD7767-2 include an on-board digital fil-

ter (complete with linear phase response) that acts to eliminate

out-of-band noise by filtering the oversampled input voltage. The

oversampled architecture also reduces front-end antialias require-

ments. Other features of the AD7767 include a SYNC/PD (synchro-

nization/power-down) pin, allowing the synchronization of multiple

AD7767 devices. The addition of an SDI pin provides the option of

daisy chaining multiple AD7767 devices.

The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply

using a 5 V reference. The devices operate from −40°C to +105°C.

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