Datasheet LTC2302, LTC2306 (Analog Devices)

LTC2302/LTC2306 Low Noise, 500ksps, 1-/2-Channel, 12-Bit ADCs
FeaTures DescripTion
n
12-Bit Resolution
The LTC®2302/LTC2306 are low noise, 500ksps, 1‑/2‑chan‑ n
500ksps Sampling Rate
nel, 12‑bit ADCs with an SPI/MICROWIRE compatible n
Low Noise: SINAD = 72.8dB
serial interface. These ADCs include a fully differential n Guaranteed No Missing Codes sample‑and‑hold circuit to reduce common mode noise. n Single 5V Supply The internal conversion clock allows the external serial n Auto‑Shutdown Scales Supply Current with Sample output data clock (SCK) to operate at any frequency up Rate to 40MHz. n Low Power: 14mW at 500ksps The LTC2302/LTC2306 operate from a single 5V supply 70µW at 1ksps and draw just 2.8mA at a sample rate of 500ksps. The 35µW Sleep Mode auto‑shutdown feature reduces the supply current to 14µA n 1‑Channel (LTC2302) and 2‑Channel (LTC2306) at a sample rate of 1ksps. Versions n Unipolar or Bipolar Input Ranges (Software The LTC2302/LTC2306 are packaged in a tiny 10‑pin 3mm Selectable) × 3mm DFN. The low power consumption and small size n Internal Conversion Clock make the LTC2302/LTC2306 ideal for battery‑operated n SPI/MICROWIRE Compatible Serial Interface and portable applications, while the 4‑wire SPI compat‑ n Separate Output Supply OV ible serial interface makes these ADCs a good match for DD (2.7V to 5.25V) n Software Compatible with the LTC2308 isolated or remote data acquisition systems. n 10‑Pin (3mm × 3mm) DFN Package
NUMBER OF INPUT CHANNELS applicaTions TYPE 1 2 8
Int Reference LTC2308 Ext Reference LTC2302 LTC2306 n High Speed Data Acquisition L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n Industrial Process Control 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 8192 Point FFT, fIN = 1kHz (LTC2306)
5V 2.7V TO 5.25V 0 fSMPL = 500kHz 10µF 0.1µF 0.1µF –10 –20 SINAD = 72.8dB THD = –88.7dB –30 V LTC2302 DD OVDD –40 LTC2306 –50 –60 SDI –70 ANALOG INPUTS CH0 (IN+) ANALOG + 12-BIT –80 0V TO 4.096V UNIPOLAR INPUT SERIAL SDO SERIAL DATA LINK TO 500ksps ±2.048V BIPOLAR CH1 (IN–) –90 MUX – PORT ASIC, PLD, MPU, DSP ADC SCK MAGNITUDE (dB) OR SHIFT REGISTER –100 CONVST –110 –120 –130 PIN NAMES IN PARENTHESIS VREF REFER TO LTC2302 –140 GND 0.1µF 10µF 0 50 100 150 200 250 23026 TA01 FREQUENCY (kHz) 23026 TA01b 23026fb For more information www.linear.com/LTC2302 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Related Parts