LTC2450 - Easy-to-Use, Ultra-Tiny 16-Bit Delta Sigma ADC

Features

• Click Here for LTC2450 Evaluation Kit
• GND to VCC Single-Ended Input Range
• 0.02LSB RMS Noise
• 2LSB INL, No Missing Codes
• 2LSB Offset Error
• 4LSB Full-Scale Error
• Single Conversion Settling Time for Multiplexed Applications
• Single Cycle Operation with Auto Shutdown
• 350µA Supply Current
• 50nA Sleep Current
• 30 Conversions Per Second
• Internal Oscillator—No External Components Required
• Single Supply, 2.7V to 5.5V Operation
• SPI Interface
• Ultra-Tiny 2mm x 2mm DFN Package

Typical Application

Description

The LTC2450 is an ultra-tiny 16-bit analog-to-digital converter. The LTC2450 uses a single 2.7V to 5.5V supply, accepts a single-ended analog input voltage, and communicates through an SPI interface. It includes an integrated oscillator that does not require any external components. It uses a delta-sigma modulator as a converter core and provides single-cycle settling time for multiplexed applications. The converter is available in a 6-pin, 2mm × 2mm DFN package. The internal oscillator does not require any external components. The LTC2450 includes a proprietary input sampling scheme that reduces the average input sampling current several orders of magnitude.

The LTC2450 is capable of up to 30 conversions per second and, due to the very large oversampling ratio, has extremely relaxed antialiasing requirements. The LTC2450 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 uses its power supply voltage as the reference voltage and the single-ended, rail-to-rail input voltage range extends from GND to VCC.

Following a conversion, the LTC2450 can automatically enter a sleep mode and reduce its power to less than 200nA. If the user samples the ADC once a second, the LTC2450 consumes an average of less than 50µW from a 2.7V supply.

Packaging

DFN-6

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
LTC2450CDC#PBF	DFN	6	C	$2.10		View
LTC2450CDC#TRMPBF	DFN	6	C	$2.10	$1.20	View
LTC2450CDC#TRPBF	DFN	6	C	$2.10	$1.15	View
LTC2450CDC-1#PBF	DFN	6	C	$2.10		View
LTC2450CDC-1#TRMPBF	DFN	6	C	$2.10	$1.20	View
LTC2450CDC-1#TRPBF	DFN	6	C	$2.10	$1.15	View
LTC2450IDC#PBF	DFN	6	I	$2.51		View
LTC2450IDC#TRMPBF	DFN	6	I	$2.51	$1.43	View
LTC2450IDC#TRPBF	DFN	6	I	$2.51	$1.38	View
LTC2450IDC-1#PBF	DFN	6	I	$2.51		View
LTC2450IDC-1#TRMPBF	DFN	6	I	$2.51	$1.43	View
LTC2450IDC-1#TRPBF	DFN	6	I	$2.51	$1.38	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.

Evaluation Kits

Part Number	Description	Price
DC1067A-A	LTC2450 16-bit 30Hz Delta Sigma ADC in 2mm x 2mm DFN-6 Package (Requires DC590B)	$50.00
DC590B	none | USB Serial Controller	$50.00
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Applications

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

Simulate

Linear Technology offers free software and demo boards that greatly simplify the task of testing and evaluating our data converters. To use these powerful tools with this product:

• Download the QuickEval System software. The QuickEval System is a USB-based product demonstration and data acquisition system for use with Linear Technology’s A/D, D/A, LED drivers and Powered Ethernet Controllers. The software also includes web links to the appropriate device data sheets and provides an automatic update feature to keep the software current with the latest set of device drivers.
  
  
• Request the DC590 USB Data Acquisition Controller either online or from your local sales representative. The DC590 interfaces with the USB port of your computer and connects to daughter cards for specific Linear Technology data converters.
  
  
• Request the evaluation kit for the LTC2450 (DC1067A-A) from your local sales representative. This daughter card interfaces with the DC590 and, along with the QuickEval software package, allows easy evaluation of the part from your PC.