Brooke's World The life and ramblings of Brooke.

Task

Find the following types of components:

• Quad op amp for making a instrumentation amplifier ( <= 1na input bias I, cut tape, < 500 uv input voltage offset, +/- 12V input range )
  • Datasheet: http://www.ti.com/lit/ds/symlink/opa4170.pdf
    
  • Mfr:  OPA4170AIDR
    
  • Digikey:   296-29664-1-ND
    
  • Price: $2.58
  • Package:  14-SOIC (0.154″, 3.90mm Width)
• Temperature sensor with a simple analog output ( temperature sensor/transducer, cut tape, accuracy <= +/- 1C, sensing 10C-125C exclud. trip point ones )
  • Datasheet:  http://www.ti.com/lit/ds/symlink/lmt86.pdf 
    
  • Mfr: LMT86DCKT
    
  • Digikey:  296-35729-1-ND
    
  • Price: $0.73
  • Input V:  2.2-5V
  • Package: 6-TSSOP (5 Lead), SC-88A, SOT-353
  • Supply I: N/A
  • Accuracy: ±0.4°C
• Analog digital converter with 2+ inputs (so we don’t need an external mux) ( analog front end, cut tape + tube, 2+ channels, 16+ bit)
  • Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/22286A.pdf
    
  • Mfr: MCP3911A0-E/SS
    
  • Digikey:  MCP3911A0-E/SS-ND
    
  • Price: $2.33
  • Input V: 2.7 V ~ 3.6 V analog/digital
  • Package: 20-SSOP (0.209″, 5.30mm Width)
  • Supply I:
  • Bit: 24
  • Sample Rate: 125KSPS
  • Channels: 2
  • Chris actually chose 3901 due to part availability

Recall the following design goals:

• 16+ bit input
• Low cost
• 1 degree C accurate (aim for .5 C accurate)
• Swappable components
• Easy to solder components