Data Sheet

AD7767

24-Bit, 8.5 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs

Rev. D

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FEATURES

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Oversampled successive approximation (SAR) architecture

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High performance ac and dc accuracy, low power

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115.5 dB dynamic range, 32 kSPS (AD7767-2)

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112.5 dB dynamic range, 64 kSPS (AD7767-1)

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109.5 dB dynamic range, 128 kSPS (AD7767)

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−118 dB THD

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Exceptionally low power

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8.5 mW, 32 kSPS (AD7767-2)

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10.5 mW, 64 kSPS (AD7767-1)

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15 mW, 128 kSPS (AD7767)

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High dc accuracy

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24 bits, no missing codes (NMC)

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INL: ±3 ppm (typical), ±7.6 ppm (maximum)

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Low temperature drift

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Zero error drift: 15 nV/°C

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Gain error drift: 0.4 ppm/°C

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On-chip low-pass FIR filter

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Linear phase response

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Pass-band ripple: ±0.005 dB

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Stop-band attenuation: 100 dB

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

and 5 V reference

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Flexible interfacing options

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Synchronization of multiple devices

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Daisy-chain capability

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Power-down function

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Temperature range: −40°C to +105°C

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Available in 4.4 mm × 5 mm, 16-lead TSSOP

APPLICATIONS

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Low power PCI/USB data acquisition systems

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Low power wireless acquisition systems

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Vibration analysis

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Instrumentation

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High precision medical acquisition

RELATED DEVICES

Table 1. 24-Bit ADCs

Part No.

Description

AD7760

2.5 MSPS, 100 dB dynamic range,1 on-board differential amp and

reference buffer, parallel, variable decimation

AD7762/

AD7763

625 kSPS, 109 dB dynamic range,1 on-board differential amp and

reference buffer, parallel/serial, variable decimation

AD7764

312 kSPS, 109 dB dynamic range,1 on-board differential amp and

reference buffer, variable decimation (pin)

AD7765

156 kSPS, 112 dB dynamic range,1 on-board differential amp and

reference buffer, variable decimation (pin)

AD7766

128 kSPS, 109.5 dB,1 15 mW, 16-bit INL, serial interface

AD7766-1

64 kSPS 112.5 dB,1 10.5 mW, 16-bit INL, serial interface

AD7766-2

32 kSPS, 115.5 dB,1 8.5 mW, 16-bit INL, serial interface

1 Dynamic range at maximum output data rate.

FUNCTIONAL BLOCK DIAGRAM

Figure 1.