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LTC2412IGN Datasheet(PDF) 1 Page - Linear Technology |
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LTC2412IGN Datasheet(HTML) 1 Page - Linear Technology |
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1 / 36 page  LTC2412 1 2412f The LTC ®2412 is a 2-channel differential input micropower 24-bit No Latency ∆ΣTM analog-to-digital converter with an integrated oscillator. It provides 2ppm INL and 0.16ppm RMS noise over the entire supply range. The two differen- tial 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 VCC for flexible ratiometric and remote sensing measurement configurations. The full- scale differential input range is from – 0.5VREF to 0.5VREF. The reference common mode voltage, VREFCM, and the input common mode voltage, VINCM, may be indepen- dently 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 TM protocols. s Direct Sensor Digitizer s Weight Scales s Direct Temperature Measurement s Gas Analyzers s Strain-Gage Transducers s Instrumentation s Data Acquisition s Industrial Process Control s 6-Digit DVMs , LTC and LT are registered trademarks of Linear Technology Corporation. s 2-Channel Differential Input with Automatic Channel Selection (Ping-Pong) s Low Supply Current: 200 µA, 4µA in Autosleep s Differential Input and Differential Reference with GND to VCC Common Mode Range s 2ppm INL, No Missing Codes s 2.5ppm Full-Scale Error and 0.1ppm Offset s 0.16ppm Noise, 22.5 Effective Number of Bits s No Latency: Digital Filter Settles in a Single Cycle and Each Channel Conversion is Accurate s Internal Oscillator—No External Components Required s 110dB Min, 50Hz or 60Hz Notch Filter s Narrow SSOP-16 Package s Single Supply 2.7V to 5.5V Operation 2-Channel Differential Input 24-Bit No Latency ∆Σ ADC No Latency ∆Σ is a trademark of Linear Technology Corporation. MICROWIRE is a trademark of National Semiconductor Corporation. VCC REF+ FO CH0+ CH0– SCK REF– CH1+ SDO GND CS 114 4 13 3 5 THERMOCOUPLE 6 CH1– 7 12 8, 9, 10, 15, 16 11 2412 TA01 2 = INTERNAL OSC/50Hz REJECTION = EXTERNAL CLOCK SOURCE = INTERNAL OSC/60Hz REJECTION 3-WIRE SPI INTERFACE 1 µF 2.7V TO 5.5V LTC2412 VCC VIN (V) –1.5 –0.5 0.5 1.5 –1.0 0 1.0 –1.5 –0.5 0.5 1.5 2412 TA02 2.5 –2 –2.5 –1 0 1 2 TA = 90°C TA = –45°C TA = 25°C VCC = 5V REF+ = 5V REF– = GND VREF = 5V VINCM = 2.5V FO = GND Total Unadjusted Error vs Input APPLICATIO S FEATURES TYPICAL APPLICATIO DESCRIPTIO |
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