LTC2412 Series

2-Channel Differential Input 24-Bit No Latency ∆Σ ADC

Catalog

2-Channel Differential Input 24-Bit No Latency ∆Σ ADC

Part	Input Type	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Architecture	Mounting Type	Data Interface	Number of Inputs	Configuration	Sampling Rate (Per Second)	Reference Type	Operating Temperature [Max]	Operating Temperature [Min]	Number of Bits	Package / Case	Package / Case	Package / Case	Supplier Device Package	Number of A/D Converters	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]
Analog Devices LTC2412IGN#PBF	Differential	5.5 V	2.7 V	Sigma-Delta	Surface Mount	SPI	2	MUX-ADC	7.5 Per Second	External	85 °C	-40 °C	24	0.154 in	16-SSOP	3.9 mm	16-SSOP	1	2.7 V	5.5 V
Analog Devices LTC2412CGN#TRPBF	Differential	5.5 V	2.7 V	Sigma-Delta	Surface Mount	SPI	2	MUX-ADC	7.5 Per Second	External	70 °C	0 °C	24	0.154 in	16-SSOP	3.9 mm	16-SSOP	1	2.7 V	5.5 V

Catalog

2-Channel Differential Input 24-Bit No Latency ∆Σ ADC

Key Features

• 2-Channel Differential Input with Automatic Channel Selection (Ping-Pong)

• Low Supply Current: 200µA, 4µA in Autosleep

• Differential Input and Differential Reference with GND to VCCCommon Mode Range

• 2ppm INL, No Missing Codes

• 2.5ppm Full-Scale Error and 0.1ppm Offset

• 0.16ppm Noise, 22.5 Effective Number of Bits

• No Latency: Digital Filter Settles in a Single Cycle and Each Channel Conversion is Accurate

• Internal Oscillator—No External Components Required

• 110dB Min, 50Hz or 60Hz Notch Filter

• Narrow SSOP-16 Package

• Single Supply 2.7V to 5.5V Operation

Description

The LTC2412 is a 2-channel differential input micropower 24-bit No Latency ∆Σ™analog-to-digital converter with an integrated oscillator. It provides 2ppm INL and 0.16ppm RMS noise over the entire supply range. The two differential channels are converted alternately with channel ID included in the conversion results. It uses delta-sigma technology and provides single conversion settling of the digital filter. Through a single pin, the LTC2412 can be configured for better than 110dB input differential mode rejection at 50Hz or 60Hz ±2%, or it can be driven by an external oscillator for a user defined rejection frequency. The internal oscillator requires no external frequency setting components.The converter accepts any external differential reference voltage from 0.1V to VCCfor flexible ratiometric and remote sensing measurement configurations. The full-scale differential input range is from –0.5VREFto 0.5VREF. The reference common mode voltage, VREFCM, and the input common mode voltage, VINCM, may be independently set anywhere within the GND to VCC. The DC common mode input rejection is better than 140dB.The LTC2412 communicates through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE protocols.ApplicationsDirect Sensor DigitizerWeight ScalesDirect Temperature MeasurementGas AnalyzersStrain-Gage TransducersInstrumentationData AcquisitionIndustrial Process Control6-Digit DVMs