ADC 12-BIT 250KSPS 2-CHANNEL
LTC1861CMS
LTC1861 - µPower, 12-Bit, 250ksps 1- and 2-Channel ADCs in MSOP
Features
12-Bit 250ksps ADC 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 (LTC1860) or 2-Channel (LTC1861) Versions
SPI/MICROWIRE™ Compatible Serial I/O
High Speed Upgrade to LTC1286/LTC1298
Pin Compatible with 16-Bit LTC1864/LTC1865
Description
The LTC®1860/LTC1861 are 12-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 LTC1860/LTC1861 automatically power down to a typical supply current of 1nA between conversions. These 12-bit switched capacitor successive approximation ADCs include sample-and-holds. The LTC1860 has a differential analog input with an adjustable reference pin. The LTC1861 offers a software-selectable 2-channel MUX and an adjustable reference pin on the MSOP version.
The 3-wire, serial I/O, MSOP or SO-8 package and extremely high sample rate-to-power ratio make these ADCs ideal choices for compact, low power, high speed systems.
These ADCs can be used in ratiometric applications or with external references. The high impedance analog inputs and the ability to operate with reduced spans down to 1V full scale, allow direct connection to signal sources in many applications, eliminating the need for external gain stages.
Applications
High Speed Data Acquisition
Portable or Compact Instrumentation
Low Power Battery-Operated Instrumentation
Isolated and/or Remote Data Acquisition