ADS1225 Status: ACTIVE

24-bit, 100SPS ADC with Differential Input and Internal Oscillator

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Datasheet

24-Bit A/D Converter with One- and Two-Channel Differential Inputs and Int Osc (Rev. B) (ads1225.pdf, 802 KB)
29 Aug 2007 Download

	ADS1225	ADS1226
Resolution(Bits)	24	24
Sample Rate (max)	100SPS	100SPS
Architecture	Delta-Sigma	Delta-Sigma
Power Consumption(Typ)(mW)	1.6	1.6
DNL(Max)(+/-LSB)	1	1
INL(Max)(+/-LSB)	0.0005%	0.0005%
No Missing Codes(Bits)	24	24
ENOB(Bits)	21	21
No. of Supplies	2	2
Analog Voltage AV/DD(Min)(V)	2.7	2.7
Analog Voltage AV/DD(Max)(V)	5.5	5.5
Logic Voltage DV/DD(Min)(V)	2.7	2.7
Logic Voltage DV/DD(Max)(V)	5.5	5.5
Input Configuration Range	Vref	Vref
Reference Mode	Ext	Ext
Rating	Catalog	Catalog
Pin/Package	16QFN	16QFN
# Input Channels	1	2
	Samples	Samples
	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS1110: 16-Bit Delta-Sigma ADC with internal reference, PGA and oscillator. I2C Serial Interface
ADS1245: 24-bit Low-Power ADC with High-Z Input Buffer
ADS1226: 24 Bit ADC with Two Differential Input Multiplexer and Internal Oscillator
DAC7565: 12-Bit, Quad Channel, Ultra-Low Glitch, Voltage Output DAC with 2.5V, 2ppm/°C Internal Reference
OPA335: 0.05uV/C max, Single-Supply CMOS Operational Amplifier
INA128: Precision, Low Power Instrumentation Amplifiers

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Product Information

Features

100SPS Data Rate (High-Speed Mode)
Single-Cycle Settling
Easy Conversion Control with START Pin
Automatic Shutdown
Low Noise: 4µV_RMS Noise (High-Resolution Mode)
Input Multiplexer with Two Differential Channels (ADS1226)
Voltage Reference Supports Ratiometric Measurements
Self-Calibrating
Simple Read-Only 2-Wire Serial Interface
Internal High-Impedance Input Buffer
Internal Temperature Sensor
Internal Oscillator
Low-Power: 1mW While Operating, < 1µA During Shutdown
Analog and Digital Supplies: 2.7V to 5.5V
APPLICATIONS
- Hand-Held Instrumentation
- Portable Medical Equipment
- Industrial Process Control

All trademarks are the property of their respective owners.

Description

The ADS1225 and ADS1226 are 24-bit delta-sigma analog-to-digital (A/D) converters. They offer excellent performance, ease-of-use, and low power in a small 4mm × 4mm QFN package and are well-suited for demanding high-resolution measurements, especially in portable and other space-saving and power-constrained applications.

The ADS1225 and ADS1226 convert on command using a dedicated START pin. Simply pulse this pin to initiate a conversion. Data is read in a single cycle for retrieval over a 2-wire serial interface that easily connects to popular microcontrollers like the MSP430. After the conversion completes, the ADS1225 and ADS1226 automatically shuts down all circuitry.

Internal features include a two-channel multiplexer (ADS1226), selectable input buffer, temperature sensor, and oscillator. The full-scale range is defined by the external voltage reference with support provided for up to a 5V differential input signal. Two operating modes allow for speed (100SPS data rate, 15µV_RMS noise) or resolution (4µV_RMS noise, 16SPS data rate).

The ADS1225/6 supports 2.7 to 5.5V analog and digital supplies. Power consumption is 1mW while converting with 3V supplies. The ADS1225 and ADS1226 are fully specified over an extended industrial temperature range of -40°C to +105°C.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Samples
ADS1225IRGVR	ACTIVE	-40 to 105	3.70 \| 100u	QFN (RGV) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS1225IRGVRG4	ACTIVE	-40 to 105	3.70 \| 100u	QFN (RGV) \| 16	View	2500 \| LARGE T&R	Purchase Samples
ADS1225IRGVT	ACTIVE	-40 to 105	4.05 \| 100u	QFN (RGV) \| 16	View	250 \| SMALL T&R
ADS1225IRGVTG4	ACTIVE	-40 to 105	4.05 \| 100u	QFN (RGV) \| 16	View	250 \| SMALL T&R

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

	TI Inventory Status			Reported Distributor Inventory
ADS1225IRGVR	As of 10:18 AM GMT, 19 Nov 2008			As of 10:18 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2129*	>10k \| 18 Dec	6 Weeks	None Reported View Distributors
ADS1225IRGVRG4	As of 10:18 AM GMT, 19 Nov 2008			As of 10:18 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2129*	>10k \| 18 Dec	6 Weeks	Europe	Arrow Northern Europe	>1k
ADS1225IRGVT	As of 10:18 AM GMT, 19 Nov 2008			As of 10:18 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	550*	>10k \| 18 Dec	6 Weeks	Americas	DigiKey	176
					Mouser Electronics	227
					Newark	93
				Asia	WPI	140
ADS1225IRGVTG4	As of 10:18 AM GMT, 19 Nov 2008			As of 10:18 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	550*	>10k \| 18 Dec	6 Weeks	None Reported View Distributors
View all Distributors

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
ADS1225IRGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1225IRGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1225IRGVT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1225IRGVTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Datasheets

24-Bit A/D Converter with One- and Two-Channel Differential Inputs and Int Osc (Rev. B) (ads1225.pdf, 802 KB)
29 Aug 2007 Download

Application Notes

A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
12 Jan 2008 Abstract
QFN/SON PCB Attachment Application Report (Rev. A) (slua271a.htm, 8 KB)
25 Jul 2007 Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
24 May 2004 Abstract
Quad Flatpack No-Lead Logic Packages (Rev. D) (scba017d.htm, 8 KB)
16 Feb 2004 Abstract
Thermal and Electrical Properties of Selected Packaging Materials (sbfa010.htm, 8 KB)
04 Oct 2000 Abstract
Analog-to-Digital Converter Grounding Practices Affect System Performance (sbaa052.htm, 8 KB)
02 Oct 2000 Abstract
Principles of Data Acquisition and Conversion (sbaa051.htm, 8 KB)
02 Oct 2000 Abstract
Interleaving Analog-to-Digital Converters (sbaa049.htm, 8 KB)
02 Oct 2000 Abstract
What Designers Should Know About Data Converter Drift (sbaa046.htm, 8 KB)
02 Oct 2000 Abstract
High Speed Data Conversion (sbaa045.htm, 8 KB)
02 Oct 2000 Abstract

View Application Notes for Analog to Digital Converters

User Guides

View User Guides for Analog to Digital Converters

More Literature

View More Literature for Analog to Digital Converters

Tools & Software

Name	Part #	Company	Tool / Software Type
Anti-Aliasing Calculation Tool for A to D Converters	ANTIALIASINGCALC	Texas Instruments	Calculation Utilities
Op Amp to ADC Circuit Topology Calculator	ADC-INPUT-CALC	Texas Instruments	Calculation Utilities

Alternative Products - Are similar to ADS1225
Part #	Name	Comments
ADS1230	20 Bit Delta Sigma ADC for Bridge Sensors	It is a single channel 20-bit bridge type ADC
ADS1110	16-Bit Delta-Sigma ADC with internal reference, PGA and oscillator. I2C Serial Interface	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
ADS1226	24 Bit ADC with Two Differential Input Multiplexer and Internal Oscillator	It is a two channel version of ADS1225
ADS1222	24-Bit A/D Conv with 2-Channel Diff Input Multiplexer	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. Alternative device without the onboard oscillator.
ADS1224	24-bit, 240SPS ADC with 4-ch Diff Input Mux, High-Z Buffer, Serial Output	4 channel version without the onboard oscillator
ADS1100	Self-Calibrating, 16-Bit Analog-to-Digital Converter	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
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Complementary Products - Can be used with ADS1225
Part #	Name	Product Family	Comments
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