LTC2413IGN#TR Linear Technology, LTC2413IGN#TR Datasheet

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... The LTC2413 communicates through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE , LTC and LT are registered trademarks of Linear Technology Corporation. No Latency is a trademark of Linear Technology Corporation. MICROWIRE is a trademark of National Semiconductor Corporation. Measured Noise Rejection from 48Hz to 62.5Hz ...

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LTC2413 ABSOLUTE AXI U RATI GS (Notes 1, 2) Supply Voltage ( GND .......................– 0. Analog Input Pins Voltage to GND .................................... – 0. Reference Input Pins Voltage to GND ...

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U CO VERTER CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS Input Common Mode Rejection DC 2.5V REF GND IN Input Common Mode Rejection 2.5V REF 49Hz to 61.2Hz GND IN Input Normal Mode Rejection (Note 7) 49Hz ...

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LTC2413 U U DIGITAL I PUTS A D DIGITAL OUTPUTS operating temperature range, otherwise specifications are at T SYMBOL PARAMETER V High Level Input Voltage IH CS Low Level Input Voltage IL CS High ...

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CHARACTERISTICS range, otherwise specifications are SYMBOL PARAMETER f External Oscillator Frequency Range EOSC t External Oscillator High Period HEO t External Oscillator Low Period LEO t Conversion Time CONV f Internal SCK ...

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LTC2413 W U TYPICAL PERFOR A CE CHARACTERISTICS Total Unadjusted Error vs Temperature ( 5V) REF 1.5 1.0 0 REF = 5V –0.5 – ...

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W U TYPICAL PERFOR A CE CHARACTERISTICS Noise Histogram (Output Rate = 6.83Hz 2.5V) CC REF 12 10,000 CONSECUTIVE GAUSSIAN READINGS DISTRIBUTION 0.033ppm 2.5V = 0.293ppm ...

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LTC2413 W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Noise vs V INCM 850 825 800 775 REF = 5V 750 – REF = GND 725 REF + INCM ...

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W U TYPICAL PERFOR A CE CHARACTERISTICS + Full-Scale Error REF = 2.5V – REF = GND – 2.5V REF + IN = 1.25V – GND –2 F ...

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LTC2413 W U TYPICAL PERFOR A CE CHARACTERISTICS Conversion Current vs Temperature ( 220 F = GND GND SCK = NC 210 SDO = 5.5V CC 200 190 V = 4.1V CC ...

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CTIO AL BLOCK DIAGRA V CC GND + + IN – – REF – REF – + DAC TEST CIRCUITS SDO 1.69k C Hi Hi-Z ...

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LTC2413 U U APPLICATIO S I FOR ATIO Once CS is pulled LOW, the device begins outputting the conversion result. There is no latency in the conversion result. The data output corresponds to the conversion just performed. This result is ...

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U U APPLICATIO S I FOR ATIO Input Voltage Range The analog input is truly differential with an absolute/ + common mode range for the IN extending from GND – 0. these limits, the ESD protection devices begin ...

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LTC2413 U U APPLICATIO S I FOR ATIO on the rising edge of the 32nd SCK pulse. On the falling edge of the 32nd SCK pulse, SDO goes HIGH indicating the initiation of a new conversion cycle. This bit serves ...

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U U APPLICATIO S I FOR ATIO While operating with an external conversion clock of a frequency f , the LTC2413 provides better than 110dB EOSC normal mode rejection in a frequency range f 4%. The normal mode rejection as ...

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LTC2413 U U APPLICATIO S I FOR ATIO Serial Clock Input/Output (SCK) The serial clock signal present on SCK (Pin 13) is used to synchronize the data transfer. Each bit of data is shifted out the SDO pin on the ...

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U U APPLICATIO S I FOR ATIO The serial clock mode is selected on the falling edge of CS. To select the external serial clock mode, the serial clock pin (SCK) must be LOW during each CS falling edge. The ...

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LTC2413 U U APPLICATIO S I FOR ATIO CS TEST EOC BIT 0 SDO EOC Hi-Z Hi-Z SCK (EXTERNAL) SLEEP CONVERSION DATA OUTPUT Figure 7. External Serial Clock, Reduced Data Output Length Since CS is tied LOW, the end-of-conversion (EOC) ...

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U U APPLICATIO S I FOR ATIO CS SDO SCK (EXTERNAL) CONVERSION SLEEP <t EOCtest CS TEST EOC BIT 31 SDO EOC Hi-Z Hi-Z SCK (INTERNAL) CONVERSION SLEEP W U 2. ...

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LTC2413 U U APPLICATIO S I FOR ATIO then t is 3.6 pulled HIGH before time EOCtest EOSC t , the device remains in the sleep state. The conver- EOCtest sion result is held in the ...

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U U APPLICATIO S I FOR ATIO A similar situation may occur during the sleep state when CS is pulsed HIGH-LOW-HIGH in order to test the conver- sion status. If the device is in the sleep state (EOC = 0), ...

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LTC2413 U U APPLICATIO S I FOR ATIO Internal Serial Clock, Autostart Conversion This timing mode is identical to the internal serial clock, 2-wire I/O described above with one additional feature. Instead of grounding CS, an external timing capacitor is ...

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U U APPLICATIO S I FOR ATIO 100 1 1000 CAPACITANCE ON CS (pF) Figure 13. CS Capacitance ...

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LTC2413 U U APPLICATIO S I FOR ATIO velocity is approximately 183ps/inch for internal traces and 170ps/inch for surface traces. Thus, a driver gener- ating a control signal with a minimum transition time of 1ns must be connected to the ...

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U U APPLICATIO S I FOR ATIO REF LEAK V + REF I LEAK LEAK LEAK – IN ...

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LTC2413 U U APPLICATIO S I FOR ATIO For relatively small values of input capacitance (C 0.01 F), the voltage on the sampling capacitor settles almost completely and relatively large values for the source impedance result in only small errors. ...

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U U APPLICATIO S I FOR ATIO 300 REF = – REF = GND IN 240 + IN = 3.75V – 1.25V F = GND 180 ...

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LTC2413 U U APPLICATIO S I FOR ATIO Figure 27 shows the typical INL error due to the source + – resistance driving the REF or REF values are used. The effect of the source resistance on the two reference ...

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U U APPLICATIO S I FOR ATIO Figure 27. INL vs Differential Input Voltage (V and Reference Source Resistance (R Large C Output Data Rate When using its internal oscillator, the LTC2413 can pro- duce up to 6.8 readings per ...

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LTC2413 U U APPLICATIO S I FOR ATIO Third, an increase in the frequency of the external oscilla- tor above 460800Hz (a more than 3 increase in the output data rate) will start to decrease the effectiveness of the internal ...

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U U APPLICATIO S I FOR ATIO REF = 5V – REF = GND 2.5V INCM ...

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LTC2413 U U APPLICATIO S I FOR ATIO Input Bandwidth The combined effect of the internal sinc of the analog and digital autocalibration circuits deter- mines the LTC2413 input bandwidth. When the internal oscillator is used (F = LOW), the ...

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U U APPLICATIO S I FOR ATIO Normal Mode Rejection and Antialiasing One of the advantages delta-sigma ADCs offer over con- ventional ADCs is on-chip digital filtering. Combined with a large oversampling ratio, the LTC2413 significantly simplifies antialiasing filter requirements. ...

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LTC2413 U U APPLICATIO S I FOR ATIO The user can expect to achieve in practice this level of performance using the internal oscillator demon- strated by Figure 41. Typical measured values of the normal mode rejection ...

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U U APPLICATIO S I FOR ATIO range of 5V peak-to-peak. Figure 42 shows measurement results for the LTC2413 normal mode rejection ratio with a 7.5V peak-to-peak (150% of full scale) input signal su- perimposed over the more traditional normal ...

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LTC2413 U U APPLICATIO S I FOR ATIO For those applications that cannot be fulfilled by the LTC2413 alone, compensating for error in external ampli- fication can be done effectively due to the “no latency” feature of the LTC2413. No ...

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U U APPLICATIO S I FOR ATIO has common mode rejection far beyond that of most amplifiers. The LTC1051 is a dual autozero amplifier that can be used to produce a gain of 15 before its input referred noise dominates ...

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LTC2413 U U APPLICATIO S I FOR ATIO The basic circuit shown in Figure 46 shows connections for a full 4-wire connection to the sensor, which may be located remotely. The differential input connections will reject induced or coupled 60Hz ...

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U U APPLICATIO S I FOR ATIO be a source of error. The fact that input offset voltage has relatively little effect on overall error may lead one to use low performance amplifiers for this application. Note that the gain ...

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LTC2413 U U APPLICATIO S I FOR ATIO PLATINUM 100 RTD Figure 47. Remote Half Bridge Sensing with Noise Suppression on Reference 2. REF 25.5k 4 – ...

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U U APPLICATIO S I FOR ATIO 15V 2N3904 33 0 350 BRIDGE 33 Q2 2N3906 6 20 –15V 0 Figure 48. LTC1043 Provides Precise 4X Reference for Excitation Voltages W U 15V ...

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LTC2413 U U APPLICATIO S I FOR ATIO TO OTHER DEVICES Figure 49. Use a Differential Multiplexer to Expand Channel Capability 74HC4052 ...

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... GND 16-LEAD PLASTIC SSOP Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 16-Lead Plastic SSOP (Narrow .150 Inch) ...

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... Noise, 8ppm INL, Pin Compatible with LTC2400 ADC 1.2ppm Noise, 8ppm INL, Pin Compatible with LTC2404/LTC2408 5V LT1236 0 LTC2413 3 + REF 4 – REF – IN RN1 GND 10k 10, 15, 16 RN1 IS CADDOCK T914 10K-010-02 2413 F50 Noise P-P LT/TP 0501 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2000 sn2413 2413fs ...