LTC2452 - Ultra-Tiny, Differential, 16-Bit Delta Sigma ADC with SPI Interface

Features

• ±V_CC Differential Input Range
• 16-Bit Resolution (Including Sign), No Missing Codes
• 2LSB Offset Error
• 4LSB Full-Scale Error
• 60 Conversions Per Second
• Single Conversion Settling Time for Multiplexed Applications
• Single-Cycle Operation with Auto Shutdown
• 800μA Supply Current
• 0.2μA Sleep Current
• Internal Oscillator—No External Components Required
• SPI Interface
• Ultra-Tiny 3mm × 2mm DFN and TSOT-23 Packages

Typical Application

Description

The LTC2452 is an ultra-tiny, fully differential, 16-bit, analog-to-digital converter. The LTC2452 uses a single 2.7V to 5.5V supply and communicates through an SPI interface. The ADC is available in an 8-pin, 3mm × 2mm DFN package or TSOT-23 package. It includes an integrated oscillator that does not require any external components. It uses a delta-sigma modulator as a converter core and has no latency for multiplexed applications. The LTC2452 includes a proprietary input sampling scheme that reduces the average input sampling current several orders of magnitude when compared to conventional delta-sigma converters. Additionally, due to its architecture, there is negligible current leakage between the input pins.

The LTC2452 can sample at 60 conversions per second, and due to the very large oversampling ratio, has extremely relaxed antialiasing requirements. The LTC2452 includes continuous internal offset and full-scale calibration algorithms which are transparent to the user, ensuring accuracy over time and over the operating temperature range. The converter has an external REF pin and the differential input voltage range can extend up to ±V_REF.

 Following a single conversion, the LTC2452 can automatically enter a sleep mode and reduce its supply current to less than 0.2μA. If the user reads the ADC once a second, the LTC2452 consumes an average of less than 50μW from a 2.7V supply.

Packaging

DFN-8

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC2452CDDB#TRMPBF	DFN	8	C	$2.32	$1.30	View
LTC2452CDDB#TRPBF	DFN	8	C		$1.25	View
LTC2452CTS8#TRMPBF	SOT	8	C	$2.32	$1.30	View
LTC2452CTS8#TRPBF	SOT	8	C		$1.25	View
LTC2452IDDB#TRMPBF	DFN	8	I	$2.77	$1.55	View
LTC2452IDDB#TRPBF	DFN	8	I		$1.50	View
LTC2452ITS8#TRMPBF	SOT	8	I	$2.77	$1.55	View
LTC2452ITS8#TRPBF	SOT	8	I		$1.50	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

• System Monitoring
• Environmental Monitoring
• Direct Temperature Measurements
• Instrumentation
• Industrial Process Control
• Data Acquisition
• Embedded ADC Upgrades

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