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LTC2440IGN 数据表(PDF) 1 Page - Linear Technology |
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LTC2440IGN 数据表(HTML) 1 Page - Linear Technology |
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1 / 28 page  LTC2440 1 sn2440, 2440fas The LTC ®2440 is a high speed 24-bit No Latency ∆ΣTMADC with 5ppm INL and 5 µV offset. It uses proprietary delta- sigma architecture enabling variable speed and resolution with no latency. Ten speed/resolution combinations (6.9Hz/ 200nVRMS to 3.5kHz/25µVRMS) are programmed through a simple serial interface. Alternatively, by tying a single pin HIGH or LOW, a fast (880Hz/2 µVRMS) or ultralow noise (6.9Hz, 200nVRMS, 50/60Hz rejection) speed/resolution combination can be easily selected. The accuracy (offset, full-scale, linearity, drift) and power dissipation are inde- pendent of the speed selected. Since there is no latency, a speed/resolution change may be made between conver- sions with no degradation in performance. Following each conversion cycle, the LTC2440 automati- cally enters a low power sleep state. Power dissipation may be reduced by increasing the duration of this sleep state. For example, running at the 3.5kHz conversion speed but reading data at a 100Hz rate draws 240 µA average current (1.1mW) while reading data at a 7Hz output rate draws only 25 µA (125µW).The LTC2440 com- municates through a flexible 3-wire or 4-wire digital inter- face that is compatible with the LTC2410 and is available in a narrow 16-lead SSOP package. ■ High Speed Multiplexing ■ Weight Scales ■ Auto Ranging 6-Digit DVMs ■ Direct Temperature Measurement ■ High Speed Data Acquisition , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Up to 3.5kHz Output Rate ■ Selectable Speed/Resolution ■ 2 µVRMS Noise at 880Hz Output Rate ■ 200nVRMS Noise at 6.9Hz Output Rate with Simultaneous 50/60Hz Rejection ■ 0.0005% INL, No Missing Codes ■ Autosleep Enables 20 µA Operation at 6.9Hz ■ <5 µV Offset (4.5V < VCC < 5.5V, –40°C to 85°C) ■ Differential Input and Differential Reference with GND to VCC Common Mode Range ■ No Latency, Each Conversion is Accurate Even After an Input Step ■ Internal Oscillator—No External Components ■ Pin Compatible with the LTC2410 ■ 24-Bit ADC in Narrow 16-Lead SSOP Package 24-Bit High Speed Differential ∆Σ ADC with Selectable Speed/Resolution Speed vs RMS Noise Simple 24-Bit 2-Speed Acquisition System 215 3 13 12 5 6 11 10 2440 TA01 2440 TA01 14 7 1, 8, 9, 16 REFERENCE VOLTAGE 0.1V TO VCC ANALOG INPUT –0.5VREF TO 0.5VREF 3-WIRE SPI INTERFACE 6.9Hz, 200nV NOISE, 50/60Hz REJECTION 880Hz OUTPUT RATE, 2 µV NOISE 10-SPEED SERIAL PROGRAMMABLE VCC 4.5V TO 5.5V 4 VCC BUSY FO REF+ SCK IN+ IN– SDO GND CS EXT SDI LTC2440 REF– CONVERSION RATE (Hz) 1 0.1 1 10 100 10 100 2440 TA02 1000 10000 VCC = 5V VREF = 5V VIN + = V IN – = 0V 2 µV AT 880Hz 200nV AT 6.9Hz (50/60Hz REJECTION) APPLICATIO S FEATURES TYPICAL APPLICATIO DESCRIPTIO No Latency ∆Σ is a trademark of Linear Technology Corporation. |
类似零件编号 - LTC2440IGN |
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类似说明 - LTC2440IGN |
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