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LTC2302 Dataheets PDF



Part Number LTC2302
Manufacturers Linear Technology Corporation
Logo Linear Technology Corporation
Description 12-Bit ADC
Datasheet LTC2302 DatasheetLTC2302 Datasheet (PDF)

Features n 12-Bit Resolution n 500ksps Sampling Rate n Low Noise: SINAD = 72.8dB n Guaranteed No Missing Codes n Single 5V Supply n Auto-Shutdown Scales Supply Current with Sample Rate n Low Power: 14mW at 500ksps 70µW at 1ksps 35µW Sleep Mode n 1-Channel (LTC2302) and 2-Channel (LTC2306) Versions n Unipolar or Bipolar Input Ranges (Software Selectable) n Internal Conversion Clock n SPI/MICROWIRE Compatible Serial Interface n Separate Output Supply OVDD (2.7V to 5.25V) n Softw.

  LTC2302   LTC2302


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Features n 12-Bit Resolution n 500ksps Sampling Rate n Low Noise: SINAD = 72.8dB n Guaranteed No Missing Codes n Single 5V Supply n Auto-Shutdown Scales Supply Current with Sample Rate n Low Power: 14mW at 500ksps 70µW at 1ksps 35µW Sleep Mode n 1-Channel (LTC2302) and 2-Channel (LTC2306) Versions n Unipolar or Bipolar Input Ranges (Software Selectable) n Internal Conversion Clock n SPI/MICROWIRE Compatible Serial Interface n Separate Output Supply OVDD (2.7V to 5.25V) n Software Compatible with the LTC2308 n 10-Pin (3mm × 3mm) DFN Package Applications n High Speed Data Acquisition n Industrial Process Control n Motor Control n Accelerometer Measurements n Battery-Operated Instruments n Isolated and/or Remote Data Acquisition LTC2302/LTC2306 Low Noise, 500ksps, 1-/2-Channel, 12-Bit ADCs Description The LTC®2302/LTC2306 are low noise, 500ksps, 1‑/2‑chan‑ nel, 12-bit ADCs with an SPI/MICROWIRE compatible serial interface. These ADCs include a fully differential sample-and-hold circuit to reduce common mode noise. The internal conversion clock allows the external serial output data clock (SCK) to operate at any frequency up to 40MHz. The LTC2302/LTC2306 operate from a single 5V supply and draw just 2.8mA at a sample rate of 500ksps. The auto-shutdown feature reduces the supply current to 14µA at a sample rate of 1ksps. The LTC2302/LTC2306 are packaged in a tiny 10-pin 3mm × 3mm DFN. The low power consumption and small size make the LTC2302/LTC2306 ideal for battery-operated and portable applications, while the 4-wire SPI compat‑ ible serial interface makes these ADCs a good match for isolated or remote data acquisition systems. TYPE Int Reference Ext Reference NUMBER OF INPUT CHANNELS 128 LTC2308 LTC2302 LTC2306 L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application 5V 10µF 0.1µF 0.1µF 2.7V TO 5.25V VDD OVDD ANALOG INPUTS CH0 (IN+) 0V TO 4.096V UNIPOLAR ±2.048V BIPOLAR CH1 (IN–) ANALOG INPUT MUX + 12-BIT – 500ksps ADC PIN NAMES IN PARENTHESIS REFER TO LTC2302 GND LTC2302 LTC2306 SERIAL PORT SDI SDO SCK CONVST SERIAL DATA LINK TO ASIC, PLD, MPU, DSP OR SHIFT REGISTER 0.1µF VREF 10µF 23026 TA01 For more information www.linear.com/LTC2302 MAGNITUDE (dB) 8192 Point FFT, fIN = 1kHz (LTC2306) 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 –140 0 fSMPL = 500kHz SINAD = 72.8dB THD = –88.7dB 50 100 150 200 250 FREQUENCY (kHz) 23026 TA01b 23026fb 1 LTC2302/LTC2306 Absolute Maximum Ratings (Notes 1, 2) Supply Voltage (VDD, OVDD)......................... –0.3V to 6V Analog Input Voltage (Note 3) CH0(IN+)-CH1(IN–), REF ...............................(GND – 0.3V) to (VDD + 0.3V) Digital Input Voltage (Note 3)..............................(GND – 0.3V) to (VDD + 0.3V) Digital Output Voltage .... (GND – 0.3V) to (OVDD + 0.3V) Power Dissipation............................................... 500mW Operating Temperature Range LTC2302C/LTC2306C............................... 0°C to 70°C LTC2302I/LTC2306I..............................–40°C to 85°C Storage Temperature Range...................–65°C to 150°C Pin Configuration LTC2302 TOP VIEW SDO CONVST VDD IN+ IN– 1 2 3 4 5 10 OVDD 9 SCK 11 8 SDI 7 GND 6 VREF DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 43°C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB LTC2306 TOP VIEW SDO CONVST VDD CH0 CH1 1 2 3 4 5 10 OVDD 9 SCK 11 8 SDI 7 GND 6 VREF DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 43°C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB order information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2302CDD#PBF LTC2302CDD#TRPBF LDGV 10-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C LTC2302IDD#PBF LTC2302IDD#TRPBF LDGV 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LTC2306CDD#PBF LTC2306CDD#TRPBF LDGW 10-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C LTC2306IDD#PBF LTC2306IDD#TRPBF LDGW 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 23026fb 2 For more information www.linear.com/LTC2302 LTC2302/LTC2306 C ONVERTER AND MULTIPLEXER CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 4, 5) PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution (No Missing Codes) l 12 Bits Integral Linearity Error (Note 6) l ±0.3 ±1 LSB Differential L.


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