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Product Descriptions

The AD7766/AD7766-1/AD7766-2 are high performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). 

The AD7766/AD7766-1/AD7766-2 combine the benefits of a large dynamic 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 AD7766/AD7766-1/AD7766-2 provide 24-bit resolution. The combination of exceptional SNR, wide dynamic range, and outstanding dc accuracy make the AD7766/AD7766-1/ AD7766-2 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 AD7766/AD7766-1/ AD7766-2 accurately gather both ac and dc information. 

The AD7766/AD7766-1/AD7766-2 include an on-board digital filter (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 requirements. Other features of the AD7766/AD7766-1/AD7766-2 include a SYNC/PD (synchronization/power-down) pin, allowing the synchronization of multiple AD7766/AD7766-1/AD7766-2 devices. The addition of an SDI pin provides the option of daisy chaining multiple AD7766/AD7766-1/AD7766-2 devices. 

The AD7766/AD7766-1/AD7766-2 operate from a 2.5 V supply using a 5 V reference. The devices operate from ?40°C to +105°C.

Product Features

? Oversampled successive approximation (SAR) architecture 

? High performance ac and dc accuracy, low power 

- 115.5 dB dynamic range, 32 kSPS (AD7766-2) 

- 112.5 dB dynamic range, 64 kSPS (AD7766-1) 

- 109.5 dB dynamic range, 128 kSPS (AD7766) 

?112 dB THD 

? Exceptionally low power 

- 8.5 mW, 32 kSPS (AD7766-2) 

- 10.5 mW, 64 kSPS (AD7766-1) 

- 15 mW, 128 kSPS (AD7766) 

? High dc accuracy 

- 24 bits, no missing codes (NMC) 

- INL: ±6 ppm (typical), ±15 ppm (maximum) 

? Low temperature drift 

- Zero error drift: 15 nV/°C 

- Gain error drift: 0.4 ppm/°C 

? On-chip low-pass FIR filter 

- Linear phase response 

- Pass-band ripple: ±0.005 dB 

- Stop-band attenuation: 100 dB 

? 2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options 

? Flexible interfacing options 

- Synchronization of multiple devices 

- Daisy-chain capability 

- Power-down function 

? Temperature range: ?40°C to +105°C 

Product Applications

? Low power PCI/USB data acquisition systems 

? Low power wireless acquisition systems 

? Vibration analysis 

? Instrumentation 

? High precision medical acquisition

Specifications

Actual product photos

Product Data Book：

For more product information, please download the PDF

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