LTC2381-16 Series

16-Bit, 250ksps, Low Power SAR ADC with Serial Interface

Catalog

16-Bit, 250ksps, Low Power SAR ADC with Serial Interface

Part	Mounting Type	Supplier Device Package	Ratio - S/H:ADC	Configuration	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Input Type	Sampling Rate (Per Second)	Package / Case	Number of A/D Converters	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Reference Type	Number of Bits	Data Interface	Architecture	Number of Inputs
Analog Devices LTC2381IDE-16#TRPBF	Surface Mount	16-DFN (4x3)	1:1	S/H-ADC	2.625 V	2.375 V	Differential	250 k	16-WFDFN Exposed Pad	1	85 °C	-40 °C	2.375 V	2.625 V	External	16	SPI	SAR	1
Analog Devices LTC2381CMS-16#PBF	Surface Mount	16-MSOP	1:1	S/H-ADC	2.625 V	2.375 V	Differential	250 k	16-TFSOP	1	70 °C	0 °C	2.375 V	2.625 V	External	16	SPI	SAR	1

Catalog

16-Bit, 250ksps, Low Power SAR ADC with Serial Interface

Key Features

• 250ksps Throughput Rate

• ±2LSB INL (Max)

• Guaranteed 16-Bit No Missing Codes

• Low Power: 3.25mW at 250ksps, 13μW at 1ksps

• 92dB SNR (typ) at fIN= 20kHz

• Extended Acquisition Time of 3.25μs Allows Use of Lower Power Drivers

• Guaranteed Operation to 125°C

• 2.5V Supply

• Fully Differential Input Range ±2.5V

• External 2.5V Reference Input

• No Pipeline Delay, No Cycle Latency

• 1.8V to 5V I/O Voltages

• SPI-Compatible Serial I/O with Daisy-Chain Mode

• Internal Conversion Clock

• 16-pin MSOP and 4mm × 3mm DFN Packages

Description

The LTC2381-16 is a low noise, low power, high speed 16-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2381-16 has a ±2.5V fully differential input range. The LTC2381-16 consumes only 3.25mW and achieves ±2LSB INL max, no missing codes at 16-bits and 92dB SNR.The LTC2381-16 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisychain mode. The fast 250ksps throughput with no cycle latency makes the LTC2381-16 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2381-16 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate.The LTC2381-16 features a proprietary sampling architecture that enables the ADC to begin acquiring the next sample during the current conversion. The resulting extended acquisition time of 3.25μs allows the use of extremely low power ADC drivers.ApplicationsMedical ImagingHigh Speed Data AcquisitionPortable or Compact InstrumentationIndustrial Process ControlLow Power Battery-Operated InstrumentationATE