Datasheet LTC2372-16 (Analog Devices)

LTC2372-16 16-Bit, 500ksps, 8-Channel SAR ADC with 96dB SNR
FeaTures DescripTion
n
500ksps Throughput Rate
The LTC®2372-16 is a low noise, high speed, 8-channel n
16-Bit Resolution with No Missing Codes
16-bit successive approximation register (SAR) ADC. Oper- n
8-Channel Multiplexer with Selectable Input Range
ating from a single 5V supply, the LTC2372-16 has a highly n
Fully Differential (±4.096V)
configurable, low crosstalk 8-channel input multiplexer, n
Pseudo-Differential Unipolar (0V to 4.096V)
supporting fully differential, pseudo-differential unipolar n
Pseudo-Differential Bipolar (±2.048V)
and pseudo-differential bipolar analog input ranges. The n
INL: ±1LSB (Maximum)
LTC2372-16 achieves ±1LSB INL (maximum) in all input n
SNR: 96dB (Fully Differential)/93.5dB (Pseudo-
ranges, no missing codes at 16-bits and 96dB (fully
Differential) (Typical) at fIN = 1kHz
differential)/93.5dB (pseudo-differential) SNR (typical). n
THD: –110dB (Typical) at fIN = 1kHz
The LTC2372-16 has an onboard low drift (20ppm/°C n Programmable Sequencer max) 2.048V temperature-compensated reference and n Selectable Digital Gain Compression a single-shot capable reference buffer. The LTC2372-16 n Single 5V Supply with 1.8V to 5V I/O Voltages also has a high speed SPI-compatible serial interface that n SPI-Compatible Serial I/O supports 1.8V, 2.5V, 3.3V and 5V logic through which a n Onboard 2.048V Reference and Reference Buffer sequencer with a depth of 16 may be programmed. An n No Pipeline Delay, No Cycle Latency internal oscillator sets the conversion time, easing external n Power Dissipation 27mW (Typical) timing considerations. The LTC2372-16 dissipates only n Guaranteed Operation to 125°C 27mW and automatically naps between conversions, n 32-Lead 5mm × 5mm QFN Package leading to reduced power dissipation that scales with the
applicaTions
sampling rate. A sleep mode is also provided to reduce the power consumption of the LTC2372-16 to 300μW for n Programmable Logic Controllers further power savings during inactive periods. n Industrial Process Control L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property High Speed Data Acquisition of their respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673. n Portable or Compact Instrumentation n ATE
Typical applicaTion Integral Nonlinearity vs Output Code
5V 4.096V 1.8V TO 5V 1.0 FULLY DIFFERENTIAL 0V 0.8 10µF 2.2µF BIPOLAR 0.1µF UNIPOLAR 0V 0.6 0.4 10Ω 4.096V CH0 VDD VDDLBYP OVDD RESET + 0.2 1200pF CH1 LTC2372-16 RDL 0V CH2 –0.0 CH3 + 4.096V 10Ω 1200pF MUX 16-BIT SDO – –0.2 CH4 SAMPLING ADC SCK 0V CH5 INL ERROR (LSB) – + – SDI –0.4 CH6 + – BUSY CH7 SAMPLE –0.6 4.096V CNV COM MUXOUT MUXOUT CLOCK ADCIN ADCIN REFBUF REFIN GND –0.8 0V 237216 TA01a 47µF 0.1µF –1.0 2.048V 0 16384 32768 49152 65536 OUTPUT CODE 237216 TA01b 237216f For more information www.linear.com/LTC2372-16 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information Timing Diagrams Board Layout Schematics Package Description Typical Application Related Parts