Datasheet LTC2380-16 (Analog Devices)

LTC2380-16 16-Bit, 2Msps, Low Power SAR ADC with 96.2dB SNR
FEATURES DESCRIPTION
n
2Msps Throughput Rate
The LTC®2380-16 is a low noise, low power, high speed n
±0.6LSB INL (Max)
16-bit successive approximation register (SAR) ADC. n
Guaranteed 16-Bit No Missing Codes
Operating from a 2.5V supply, the LTC2380-16 has a n
Low Power: 19mW at 2Msps, 19µW at 2ksps
±VREF fully differential input range with VREF ranging from n
96.2dB SNR (Typ) at fIN = 2kHz
2.5V to 5.1V. The LTC2380-16 consumes only 19mW and n –
117dB THD (Typ) at fIN = 2kHz
achieves ±0.6LSB INL maximum, no missing codes at n
Digital Gain Compression (DGC)
16 bits with 96.2dB SNR. n Guaranteed Operation to 125°C The LTC2380-16 has a high speed SPI-compatible serial n 2.5V Supply interface that supports 1.8V, 2.5V, 3.3V and 5V logic n Fully Differential Input Range ±VREF while also featuring a daisy-chain mode. The fast 2Msps n VREF Input Range from 2.5V to 5.1V throughput with no cycle latency makes the LTC2380-16 n No Pipeline Delay, No Cycle Latency ideally suited for a wide variety of high speed applications. n 1.8V to 5V I/O Voltages An internal oscillator sets the conversion time, easing exter- n SPI-Compatible Serial I/O with Daisy-Chain Mode nal timing considerations. The LTC2380-16 automatically n Internal Conversion Clock powers down between conversions, leading to reduced n 16-Lead MSOP and 4mm × 3mm DFN Packages power dissipation that scales with the sampling rate. The LTC2380-16 features a unique digital gain compres-
APPLICATIONS
sion (DGC) function, which eliminates the driver amplifier’s n Medical Imaging negative supply while preserving the full resolution of the n High Speed Data Acquisition ADC. When enabled, the ADC performs a digital scaling n Portable or Compact Instrumentation function that maps zero-scale code from 0V to 0.1 • VREF n Industrial Process Control and full-scale code from VREF to 0.9 • VREF. For a typical n Low Power Battery-Operated Instrumentation reference voltage of 5V, the full-scale input range is now n ATE 0.5V to 4.5V, which provides adequate headroom for L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property powering the driving amplifier from a single 5.5V supply. of their respective owners. Protected by U.S. Patents including 7705765.
TYPICAL APPLICATION 32k Point FFT fS = 2Msps, fIN = 2kHz
0 2.5V 1.8V TO 5V SNR = 96.4dB –20 THD = –119dB SINAD = 96.3dB 10µF 0.1µF –40 SFDR = 122dB –60 V V REF 20Ω 3300pF DD OVDD CHAIN RDL/SDI –80 IN+ 0V SDO 3300pF LTC2380-16 SCK –100 VREF BUSY IN– CNV SAMPLE CLOCK AMPLITUDE (dBFS) –120 0V 20Ω 3300pF REF GND REF/DGC VREF –140 2.5V TO 5.1V 238016 TA01 –160 47µF –180 (X5R, 0805 SIZE) 0 100 200 300 400 500 600 700 800 900 1000 FREQUENCY (kHz) 238016 TA02 238016fb For more information www.linear.com/LTC2380-16 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Reference Input Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information Board Layout Package Description Typical Application Related Parts