Catalog
24-Bit, 8.5 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs
Key Features
• DownloadAD7766-2-KGD Data Sheet. Available as Known Good Die and fully guaranteed in data sheet specifications
• 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 filterLinear phase responsePass-band ripple: ±0.005 dBStop-band attenuation: 100 dB
• 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 and 5 V reference
• Flexible interfacing optionsSynchronization of multiple devicesDaisy-chain capability
• Synchronization of multiple devices
• Daisy-chain capability
Description
AI
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 USBbased 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 aSYNC/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.ApplicationsLow power PCI/USB data acquisition systemsLow power wireless acquisition systemsVibration analysisInstrumentationHigh precision medical acquisition
