Datasheet LTC2308 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Low Noise, 500ksps, 8-Channel, 12-Bit ADC |
| Pages / Page | 22 / 1 — FEATURES. DESCRIPTION. 12-Bit Resolution. 500ksps Sampling Rate. Low … |
| File Format / Size | PDF / 679 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. 12-Bit Resolution. 500ksps Sampling Rate. Low Noise: SINAD = 73.3dB. APPLICATIONS. TYPICAL APPLICATION
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LTC2308 Low Noise, 500ksps, 8-Channel, 12-Bit ADC
FEATURES DESCRIPTION
n
12-Bit Resolution
The LTC®2308 is a low noise, 500ksps, 8-channel, 12-bit n
500ksps Sampling Rate
ADC with an SPI/MICROWIRE compatible serial interface. n
Low Noise: SINAD = 73.3dB
This ADC includes an internal reference and a fully differ- n Guaranteed No Missing Codes ential sample-and-hold circuit to reduce common mode n Single 5V Supply noise. The internal conversion clock allows the external n Auto-Shutdown Scales Supply Current with Sample serial output data clock (SCK) to operate at any frequency Rate up to 40MHz. n Low Power: 17.5mW at 500ksps The LTC2308 operates from a single 5V supply and draws 0.9mW Nap Mode just 3.5mA at a sample rate of 500ksps. The auto-shutdown 35µW Sleep Mode feature reduces the supply current to 200µA at a sample n Internal Reference rate of 1ksps. n Internal 8-Channel Multiplexer n Internal Conversion Clock The LTC2308 is packaged in a small 24-pin 4mm × 4mm n SPI/MICROWIRETM Compatible Serial Interface QFN. The internal 2.5V reference and 8-channel multiplexer n Unipolar or Bipolar Input Ranges (Software Selectable) further reduce PCB board space requirements. n Separate Output Supply OVDD (2.7V to 5.25V) The low power consumption and small size make the n 24-Pin 4mm × 4mm QFN Package LTC2308 ideal for battery operated and portable appli-
APPLICATIONS
cations, while the 4-wire SPI compatible serial interface makes this ADC a good match for isolated or remote data n acquisition systems. High Speed Data Acquisition n Industrial Process Control L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Motor Control n Accelerometer Measurements n Battery Operated Instruments n Isolated and/or Remote Data Acquisition
TYPICAL APPLICATION
5V
8192 Point FFT, fIN = 1kHz
0.1µF 10µF 10µF 0.1µF 0 –10 fSMPL = 500kHz AV 2.7V TO 5.25 V CH0 DD DVDD OVDD –20 SINAD = 73.6dB THD = –89.5dB LTC2308 0.1µF –30 CH1 –40 CH2 –50 SDI ANALOG –60 CH3 + 12-BIT CH0-CH7 INPUT SERIAL SDO SERIAL DATA LINK TO 500ksps –70 ANALOG INPUTS CH4 MUX – PORT ASIC, PLD, MPU, DSP ADC SCK –80 0V TO 4.096V UNIPOLAR OR SHIFT REGISTER CH5 ±2.048V BIPOLAR CONVST MAGNITUDE (dB) –90 –100 CH6 VREF –110 CH7 INTERNAL 2.2µF –120 COM 2.5V REF –130 –140 0 50 100 150 200 250 FREQUENCY (kHz) REFCOMP 2308 TA01b GND 0.1µF 10µF 2308 TA01 2308fc For more information www.linear.com/LTC2308 1
FEATURES DESCRIPTION
n
12-Bit Resolution
The LTC®2308 is a low noise, 500ksps, 8-channel, 12-bit n
500ksps Sampling Rate
ADC with an SPI/MICROWIRE compatible serial interface. n
Low Noise: SINAD = 73.3dB
This ADC includes an internal reference and a fully differ- n Guaranteed No Missing Codes ential sample-and-hold circuit to reduce common mode n Single 5V Supply noise. The internal conversion clock allows the external n Auto-Shutdown Scales Supply Current with Sample serial output data clock (SCK) to operate at any frequency Rate up to 40MHz. n Low Power: 17.5mW at 500ksps The LTC2308 operates from a single 5V supply and draws 0.9mW Nap Mode just 3.5mA at a sample rate of 500ksps. The auto-shutdown 35µW Sleep Mode feature reduces the supply current to 200µA at a sample n Internal Reference rate of 1ksps. n Internal 8-Channel Multiplexer n Internal Conversion Clock The LTC2308 is packaged in a small 24-pin 4mm × 4mm n SPI/MICROWIRETM Compatible Serial Interface QFN. The internal 2.5V reference and 8-channel multiplexer n Unipolar or Bipolar Input Ranges (Software Selectable) further reduce PCB board space requirements. n Separate Output Supply OVDD (2.7V to 5.25V) The low power consumption and small size make the n 24-Pin 4mm × 4mm QFN Package LTC2308 ideal for battery operated and portable appli-
APPLICATIONS
cations, while the 4-wire SPI compatible serial interface makes this ADC a good match for isolated or remote data n acquisition systems. High Speed Data Acquisition n Industrial Process Control L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Motor Control n Accelerometer Measurements n Battery Operated Instruments n Isolated and/or Remote Data Acquisition
TYPICAL APPLICATION
5V
8192 Point FFT, fIN = 1kHz
0.1µF 10µF 10µF 0.1µF 0 –10 fSMPL = 500kHz AV 2.7V TO 5.25 V CH0 DD DVDD OVDD –20 SINAD = 73.6dB THD = –89.5dB LTC2308 0.1µF –30 CH1 –40 CH2 –50 SDI ANALOG –60 CH3 + 12-BIT CH0-CH7 INPUT SERIAL SDO SERIAL DATA LINK TO 500ksps –70 ANALOG INPUTS CH4 MUX – PORT ASIC, PLD, MPU, DSP ADC SCK –80 0V TO 4.096V UNIPOLAR OR SHIFT REGISTER CH5 ±2.048V BIPOLAR CONVST MAGNITUDE (dB) –90 –100 CH6 VREF –110 CH7 INTERNAL 2.2µF –120 COM 2.5V REF –130 –140 0 50 100 150 200 250 FREQUENCY (kHz) REFCOMP 2308 TA01b GND 0.1µF 10µF 2308 TA01 2308fc For more information www.linear.com/LTC2308 1
