LTC2484 Series

24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation

Catalog

24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation

Part	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Number of Inputs	Sampling Rate (Per Second)	Reference Type	Number of A/D Converters	Input Type	Configuration	Mounting Type	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Architecture	Data Interface	Features	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Number of Bits	Package / Case
Analog Devices LTC2484CDD#TRPBF	5.5 V	2.7 V	1	7.5 Per Second	External	1	Differential	MUX-ADC	Surface Mount	2.7 V	5.5 V	Sigma-Delta	SPI	Temperature Sensor	70 °C	0 °C	10-DFN (3x3)	24	10-WFDFN Exposed Pad
Analog Devices LTC2484IDD#PBF	5.5 V	2.7 V	1	7.5 Per Second	External	1	Differential	MUX-ADC	Surface Mount	2.7 V	5.5 V	Sigma-Delta	SPI	Temperature Sensor	85 °C	-40 °C	10-DFN (3x3)	24	10-WFDFN Exposed Pad
Analog Devices LTC2484IDD#TRPBF	5.5 V	2.7 V	1	7.5 Per Second	External	1	Differential	MUX-ADC	Surface Mount	2.7 V	5.5 V	Sigma-Delta	SPI	Temperature Sensor	85 °C	-40 °C	10-DFN (3x3)	24	10-WFDFN Exposed Pad

Catalog

24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation

Key Features

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

• Directly Digitizes High Impedance Sensors with Full Accuracy

• 600nVRMSNoise

• GND to VCCInput/Reference Common Mode Range

• Programmable 50Hz, 60Hz or Simultaneous

• 50Hz/60Hz Rejection Mode

• 2ppm INL, No Missing Codes

• 1ppm Offset and 15ppm Total Unadjusted Error

• Selectable 2× Speed Mode (15Hz Using Internal Oscillator)

• No Latency: Digital Filter Settles in a Single Cycle

• Single Supply 2.7V to 5.5V Operation

• Internal Oscillator

• Available in a Tiny (3mm × 3mm) 10-Lead DFN Package

Description

The LTC2484 combines a 24-bit No Latency ΔΣ™analog-to-digital converter with patented 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 input signals with rail-to-rail input range to be directly digitized while maintaining exceptional DC accuracy.The LTC2484 includes an on-chip oscillator. The LTC2484 can be configured to reject line frequencies. 50Hz, 60Hz or simultaneous 50Hz/60Hz line frequency rejection can be selected as well as a 2× speed-up mode.The LTC2484 allows a wide common mode input range (0V to VCC) independent of the reference voltage. The reference can be as low as 100mV or can be tied directly to VCC. The LTC2484 includes an on-chip trimmed oscillator, eliminating the need for external crystals or oscillators. Absolute accuracy and low drift are automatically maintained through continuous, transparent, offset and full-scale calibration.ApplicationsDirect Sensor DigitizerWeight ScalesDirect Temperature MeasurementStrain Gauge TransducersInstrumentationIndustrial Process ControlDVMs and Meters