LTC2400CS8#PBF Linear Technology, LTC2400CS8#PBF Datasheet
LTC2400CS8#PBF
Specifications of LTC2400CS8#PBF
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LTC2400CS8#PBF Summary of contents
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... The LTC2400 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. V ...
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LTC2400 ABSOLUTE MAXIMUM (Notes 1, 2) Supply Voltage ( GND .......................– 0. Analog Input Voltage to GND ....... – 0. Reference Input Voltage to GND .. – 0. ...
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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 Level ...
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LTC2400 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 ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Total Unadjusted Error (3V Supply REF –55 C, – –5 –10 0 0.5 1.0 1.5 ...
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LTC2400 W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Noise vs Reference Voltage REFERENCE VOLTAGE (V) 2400 G10 Noise Histogram 1500 ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Conversion Current vs Temperature 230 220 V = 5.5V CC 210 V = 4.1V CC 200 190 V = 2.7V CC 180 170 160 150 –30 – 120 –55 20 ...
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LTC2400 W U TYPICAL PERFOR A CE CHARACTERISTICS INL vs Output Rate OUTPUT RATE (Hz PIN ...
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CTIO AL BLOCK DIAGRA V CC GND REF DAC TEST CIRCUITS SDO 3. APPLICATIONS INFORMATION Converter Operation Cycle The ...
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LTC2400 U U APPLICATIONS INFORMATION an order of magnitude. The part remains in the sleep state as long logic HIGH. The conversion result is held indefinitely in a static shift register while the converter is in the ...
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U U APPLICATIONS INFORMATION V + 0.3V CC 9/8V REF V REF NORMAL EXTENDED INPUT INPUT 1/2V REF RANGE RANGE 0 –1/8V REF –0.3V Figure 2. LTC2400 Input Range For large values of V this range is limited by the ...
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LTC2400 U U APPLICATIONS INFORMATION out on the falling edge of the 31st SCK and may be latched on the rising edge of the 32nd SCK pulse. On the falling edge of the 32nd SCK pulse, SDO goes HIGH indicating ...
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U U APPLICATIONS INFORMATION The selection of 50Hz or 60Hz rejection can also be made by driving appropriate logic level. A selection O change during the sleep or data output states will not disturb the converter operation. ...
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LTC2400 U U APPLICATIONS INFORMATION SERIAL INTERFACE The LTC2400 transmits the conversion results and re- ceives the start of conversion command through a syn- chronous 3-wire interface. During the conversion and sleep states, this interface can be used to assess ...
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U U APPLICATIONS INFORMATION External Serial Clock, Single Cycle Operation (SPI/MICROWIRE Compatible) This timing mode uses an external serial clock to shift out the conversion result and a CS signal to monitor and control the state of the conversion cycle, ...
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LTC2400 U U APPLICATIONS INFORMATION CS TEST EOC BIT 0 SDO EOC Hi-Z SCK (EXTERNAL) SLEEP CONVERSION DATA OUTPUT Figure 6. External Serial Clock, Reduced Data Output Length External Serial Clock, 2-Wire I/O This timing mode utilizes a 2-wire serial ...
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U U APPLICATIONS INFORMATION 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. LTC2400 V REF V ...
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LTC2400 U U APPLICATIONS INFORMATION Once CS is pulled LOW, SCK goes LOW and EOC is output to the SDO pin. EOC = 1 while a conversion is in progress and EOC = 0 if the device is in the ...
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U U APPLICATIONS INFORMATION HIGH state. This will cause the device to exit the internal serial clock mode on the next falling edge of CS. This can be avoided by adding an external 10k pull-up resistor to the SCK pin ...
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LTC2400 U U APPLICATIONS INFORMATION During the conversion, the SCK and the serial data output pin (SDO) are HIGH (EOC = 1). Once the conversion is complete, SCK and SDO go LOW (EOC = 0) indicating the conversion has finished ...
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U U APPLICATIONS INFORMATION 100 1000 CAPACITANCE ON CS (pF) Figure 12. CS Capacitance ...
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LTC2400 U U APPLICATIONS INFORMATION connection resistance. The LTC2400’s power supply cur- rent flowing through the 0.01 resistance of the common ground pin will develop a 2.5 V offset signal. For a reference voltage V = 2.5V, this represents a ...
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U U APPLICATIONS INFORMATION Input Current ( complete settling occurs on the input, conversion re- sults will be uneffected by the dynamic input current. If the settling is incomplete, it does not degrade the linearity performance of ...
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LTC2400 U U APPLICATIONS INFORMATION 0. –50 –100 –150 –200 –250 –300 0 200 400 600 SOURCE ...
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U U APPLICATIONS INFORMATION 160 140 REF 120 C = 0.1 F VREF 100 VREF VREF VREF ...
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LTC2400 U TYPICAL APPLICATIONS SYNCHRONIZATION OF MULTIPLE LTC2400s Since the LTC2400’s absolute accuracy (total unadjusted error) is 10ppm, applications utilizing multiple matched ADCs are possible. Simultaneous Sampling with Two LTC2400s One such application is synchronizing multiple LTC2400s, see Figure 27. ...
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U TYPICAL APPLICATIONS LTC2400 # REF V IN GND CONTROLLER SCK SDO CS1 CS2 CS3 CS4 CS1 CS2 CS3 CS4 31 OR LESS CLOCK PULSES SCK SDO Differential to Single-Ended Analog Conditioning The circuits in Figures 29 ...
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LTC2400 U TYPICAL APPLICATIONS LARGE MAGNITUDE DIFFERENTIAL INPUT C1 0.01 F 0.1 F Figure 29. Simple Rail-to-Rail Circuit Converts Differential Signals to Single-Ended Signals LTC2400 High Accuracy Differential to Single-Ended Converter for 5V Supplies The circuit in Figure 30 is ...
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U TYPICAL APPLICATIONS BRIDGE- TYPICAL V = 40mV FS INPUT 7 350 350 DIFFERENTIAL INPUT 350 350 13 16 AGND OR C1 – V 0.01 F EXT 17 0.1 F – 5V Figure 30. Differential to Single-Ended Converter for Low ...
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LTC2400 U TYPICAL APPLICATIONS Sample Driver for LTC2400 SPI Interface The LTC2400 has a very simple serial interface that makes interfacing to microprocessors and microcontrollers very easy. Shown in Figures 32 and 34 are listings of sample source codes that ...
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U TYPICAL APPLICATIONS ADlo.bit0 = in0 'and sample data line low SCK next high CS 'Disable the LTC2400 ADhi = (ADhi<<4)+((ADlo&$F000)>>12) debug ?ADhi 'Discard the lower eight bits goto Start 'and display (debug command). ShiftL Temp = ADlo.bit15 'This routine ...
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LTC2400 U TYPICAL APPLICATIONS * DIN1 EQU $00 This memory location holds the LTC2400's bits DIN2 EQU $01 This memory location holds the LTC2400's bits DIN3 EQU $02 This memory location holds the LTC2400's ...
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U TYPICAL APPLICATIONS Thermocouple Applications Figure 35 shows a thermocouple interface circuit that demonstrates the practicality of direct connection to the LTC2400 using even the lowest output thermocouples (in this case, a type S thermocouple, with a full-scale output of ...
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LTC2400 U TYPICAL APPLICATIONS thermocouple with the highest output is type E, at about 70mV. This circuit does not provide curvature correction for the Seebeck effect at the cold junction. If the applica- tion requires very high accuracy, the temperature ...
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U TYPICAL APPLICATIONS A simpler, and potentially less expensive solution is the use of the LT1025 as shown in Figure 37. The LT1025 incorporates the functions of temperature sensor, a precision divider chain required to produce the appropriate correction for ...
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LTC2400 U TYPICAL APPLICATIONS The 12.1k resistor should be a precision resistor such as a Vishay S102 series, or must be temperature stabilized. The excitation current is low enough for most sensors that the self-heating effect is near the noise ...
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U TYPICAL APPLICATIONS pick-up from the strain bearing member is largely 60Hz, the LTC2400 will reject it. If serious high frequency noise is present on the strain bearing member, it may be necessary to add buffering in order to allow ...
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... INSTALL SHUNTS ON PIN 2 AND 3 OF JP1 AND JP2 38 which graphically captures the conversion results. It can be used to determine noise performance, stability, and with an external source, linearity. As exemplified in the schematic, the LTC2400 is extremely easy to use. This demonstration board and associated software is available by contacting Linear Technology LT1236ACS8 OUT ...
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... PCB LAYOUT A D FIL Component Side Silkscreen 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. U Dimensions in inches (millimeters) unless otherwise noted ...
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... Max, 10ppm/ C Max Drift, 2.5V, 5V and 10V Versions 3 V Noise, 10-Pin MSOP Package, Ground Sensing Same Performance as LTC2400 6 V Noise, Pin-Compatible with LTC2400 Component Side Paste Mask Solder Side Paste Mask Noise P-P 2400fa LT/TP 0300 2K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 ...