Description

The LTC®1864/LTC1865 are 16-bit A/D converters that are offered in MSOP and SO-8 packages and operate on a single 5V supply. At 250ksps, the supply current is only 850μA. The supply current drops at lower speeds because the LTC1864/LTC1865 automatically power down between conversions. These 16-bit switched capacitor successive approximation ADCs include sample-andholds. The LTC1864 has a differential analog input with an adjustable reference pin. The LTC1865 offers a softwareselectable 2-channel MUX and an adjustable reference pin on the MSOP version.

Specifications and features

■ 16-Bit 250ksps ADCs in MSOP Package
■ Single 5V Supply
■ Low Supply Current: 850μA (Typ)
■ Auto Shutdown Reduces Supply Current to 2μA at 1ksps
■ True Differential Inputs
■ 1-Channel (LTC1864) or 2-Channel (LTC1865) Versions
■ SPI/MICROWIRE™ Compatible Serial I/O
■ 16-Bit Upgrade to 12-Bit LTC1286/LTC1298
■ Pin Compatible with 12-Bit LTC1860/LTC1861
■ Guaranteed Operation to +125°C (MSOP Package)

Application Scenarios

■ High Speed Data Acquisition
■ Portable or Compact Instrumentation
■ Low Power Battery-Operated Instrumentation
■ Isolated and/or Remote Data Acquisition

Comparison

Advantages:
- 16-bit resolution
- Low supply current
- Compatibility with SPI/MICROWIRE™
- Guaranteed operation in high temperatures

Disadvantages:
- Limited number of channels
- Only available in MSOP and SO-8 packages