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High-Performance Sensor Design with Voltage Reference DACs and Differential Drivers

This document provides an overview of a high-performance sensor design featuring 16 outputs, including 6 voltage outputs and 7 current outputs, utilizing a voltage reference DAC (DAC7811). Key specifications include bias currents applied to various pins for optimized operation, with meticulous attention to analog voltage rails and digital behavior. External clock waveforms and integration of differential drivers enhance sensor capabilities. The design prioritizes accuracy and stability, with detailed bias configurations ensuring high fidelity in signal processing.

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High-Performance Sensor Design with Voltage Reference DACs and Differential Drivers

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  1. TEAM 1kDesign overview LBNL group 8/25/09

  2. Sensor • TEAM 1k 1024x1024 • 16 outputs • Vhigh, Vlow

  3. Voltage reference

  4. DACs • 13 DAC 7811 • 6 Voltage output • 7 current output • Analog • J1-35: Bias-n3SRE: 300 uA to GND • J1-36: Bias-n3SBuf: 300 uA to GND • J1-37: Bias-PreDrv: 100 uA to GND • J1-38: BiasPin: 500 uA to GND • J1-39: BiasNin: 20 uA to VDD • Digital part • J2-36: BiasPin BIAS: 100 uA to GND • Voltages • Pos rail : 35mA • VDDR: ? • Pos Rail Analog: 22mA

  5. DAC7811 *For voltage buffer OPA277 (U612 in this picture) was substituted by BUF63

  6. Clock

  7. Clock wave forms External signals are only Reset (RINIT), CCk1, CCk2

  8. Hybrid board

  9. Differential Drivers

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