LTC2488 Series

16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation

Catalog

16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation

Part	Number of Inputs	Data Interface	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Number of A/D Converters	Input Type	Number of Bits	Package / Case	Architecture	Supplier Device Package	Sampling Rate (Per Second)	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Configuration	Mounting Type	Reference Type	Operating Temperature [Max]	Operating Temperature [Min]
Analog Devices LTC2488CDE#TRPBF	2 4	SPI	2.7 V	5.5 V	1	Differential Single Ended	16	14-WFDFN Exposed Pad	Sigma-Delta	14-DFN (4x3)	6.9 Per Second	5.5 V	2.7 V	MUX-ADC	Surface Mount	External	70 °C	0 °C
Analog Devices LTC2488CDE#PBF	2 4	SPI	2.7 V	5.5 V	1	Differential Single Ended	16	14-WFDFN Exposed Pad	Sigma-Delta	14-DFN (4x3)	6.9 Per Second	5.5 V	2.7 V	MUX-ADC	Surface Mount	External	70 °C	0 °C
Analog Devices LTC2488IDE#PBF	2 4	SPI	2.7 V	5.5 V	1	Differential Single Ended	16	14-WFDFN Exposed Pad	Sigma-Delta	14-DFN (4x3)	6.9 Per Second	5.5 V	2.7 V	MUX-ADC	Surface Mount	External	85 °C	-40 °C
Analog Devices LTC2488IDE#TRPBF	2 4	SPI	2.7 V	5.5 V	1	Differential Single Ended	16	14-WFDFN Exposed Pad	Sigma-Delta	14-DFN (4x3)	6.9 Per Second	5.5 V	2.7 V	MUX-ADC	Surface Mount	External	85 °C	-40 °C

Catalog

16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation

Key Features

• Up to 2 Differential or 4 Single-Ended Inputs

• Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current

• Directly Digitizes High Impedance Sensors with Full Accuracy

• 600nVRMSNoise (0.02LSB Transition Noise)

• GND to VCCInput/Reference Common Mode Range

• Simultaneous 50Hz/60Hz Rejection

• 2ppm INL, No Missing Codes

• 1ppm Offset and 15ppm Full-Scale Error

• No Latency: Digital Filter Settles in a Single Cycle, Even After a New Channel is Selected

• Single Supply 2.7V to 5.5V Operation (0.8mW)

• Internal Oscillator

• Tiny 4mm × 3mm DFN Package

Description

The LTC2488 is a 4-channel (2-channel differential), 16-bit, No Latency ΔΣ™ADC with Easy Drive™technology. 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 LTC2488 includes an integrated oscillator. This device can be configured to measure an external signal from combinations of 4 analog input channels operating in single ended or differential modes. It automatically rejects line frequencies of 50Hz and 60Hz simultaneously.The LTC2488 allows a wide common mode, input range (0V to VCC), independent of the reference voltage. Any combination of single-ended or differential inputs can be selected and the first conversion after a new channel selection is valid.ApplicationsDirect Sensor DigitizerDirect Temperature MeasurementInstrumentationIndustrial Process Control