Datasheet LTC2374-16 (Analog Devices)

LTC2374-16 16-Bit, 1.6Msps, 8-Channel SAR ADC with 96dB SNR
FeaTures DescripTion
n
1.6Msps Throughput Rate
The LTC®2374-16 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 LTC2374-16 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)
LTC2374-16 achieves ±1LSB INL (maximum) in all input n
SNR: 96dB (Fully Differential)/93dB (Pseudo-
ranges, no missing codes at 16-bits and 96dB (fully dif-
Differential) (Typical) at fIN = 1kHz
ferential)/ 93dB (pseudo-differential) SNR (typical). n
THD: –114dB (Typical) at fIN = 1kHz
n The LTC2374-16 has an onboard low drift (20ppm/°C max) Programmable Sequencer n 2.048V temperature-compensated reference and a single- Selectable Digital Gain Compression n shot capable reference buffer. The LTC2374-16 also has a Single 5V Supply with 1.8V to 5V I/O Voltages n high speed SPI-compatible serial interface that supports SPI-Compatible Serial I/O n 1.8V, 2.5V, 3.3V and 5V logic through which a sequencer Onboard 2.048V Reference and Reference Buffer n with a depth of 16 may be programmed. An internal os- No Pipeline Delay, No Cycle Latency n cillator sets the conversion time, easing external timing Power Dissipation 55mW (Typical) n considerations. The LTC2374-16 dissipates only 55mW 32-Lead 5mm × 5mm QFN Package and automatically naps between conversions, leading to
applicaTions
reduced power dissipation that scales with the sampling rate. A sleep mode is also provided to reduce the power n Programmable Logic Controllers consumption of the LTC2374-16 to 300μW for further n Industrial Process Control power savings during inactive periods. n High Speed Data Acquisition L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n SoftSpan is a trademark of Analog Devices, Inc. All other trademarks are the property of their Portable or Compact Instrumentation respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673. n ATE
Typical applicaTion Integral Nonlinearity vs Output Code
IN+/IN– 5V 1.0 UNIPOLAR 1.8V TO 5V FULLY DIFFERENTIAL 0.8 +4.096V BIPOLAR 10µF 2.2µF UNIPOLAR 0.6 0V 0.1µF 0.4 FULLY DIFFERENTIAL 10Ω VDD VDDLBYP OVDD 0.2 CH0 +4.096V RESET + 1200pF CH1 LTC2374-16 RDL 0.0 CH2 +2.048V CH3 + –0.2 10Ω 1200pF MUX 16-BIT SDO 0V – CH4 INL ERROR (LSB) SAMPLING ADC SCK –0.4 CH5 – + – BIPOLAR SDI CH6 + – –0.6 +4.096V BUSY CH7 SAMPLE CNV –0.8 COM MUXOUT MUXOUT CLOCK +2.048V ADCIN ADCIN REFBUF REFIN GND 237416 TA01a –1.0 47µF 0.1µF 0V 0 16384 32768 49152 65536 OUTPUT CODE 237416 TA01b 237416fa For more information www.linear.com/LTC2374-16 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information 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 Package Description Revision History Typical Application Related Parts