LTC2489

Supply Voltage (V_CC) ................................... 0.3V to 6V
Analog Input Voltage
(CH0 to CH3, COM) ........................0.3V to (V_CC + 0.3V)
REF^+, REF ....................................0.3V to (V_CC + 0.3V)
Digital Input Voltage ......................0.3V to (V_CC + 0.3V)
Digital Output Voltage ...................0.3V to (V_CC + 0.3V)
Operating Temperature Range
LTC2489C ................................................ 0°C to 70°C
LTC2489I ............................................. 40°C to 85°C
Storage Temperature Range ............. 65°C to 150°C

The LTC^®2489 is a 4-channel (2-channel differential), 16-bit, No Latency ™ ADC with Easy Drive technology an  a 2-wire, I²C interface. The patented sampling scheme eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current. This allows large external source impedances and rail-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy.

The LTC2489 includes an integrated oscillator. This device can be confi gured to measure an external signal from combinations of 4 analog input channels operating in singleended or differential modes. It automatically rejects line frequencies of 50Hz and 60Hz simultaneously.

The LTC2489 allows a wide, common mode input range (0V to V_CC), independent of the reference voltage. Any combination of single-ended or differential inputs can be selected and the fi rst conversion, after a new channel is selected, is valid. Access to the multiplexer output enables optional external amplifi ers to be shared between all analog inputs and auto calibration continuously removes their associated offset and drift.