ADS1224 Status: ACTIVE

24-bit, 240SPS ADC with 4-ch Diff Input Mux, High-Z Buffer, Serial Output

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Datasheet

24-Bit Analog-to-Digital Converter with 4-Channel Differential Input (Rev. B) (ads1224.pdf, 435 KB)
29 Feb 2008 Download

	ADS1222	ADS1224
Resolution(Bits)	24	24
Sample Rate (max)	240SPS	240SPS
Architecture	Delta-Sigma	Delta-Sigma
Power Consumption(Typ)(mW)	1.35	1.35
DNL(Max)(+/-LSB)	1	1
INL(Max)(+/-LSB)	0.0003%	0.0003%
No Missing Codes(Bits)	24	24
ENOB(Bits)	20
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	2Vref	2Vref
Reference Mode	Ext	Ext
Rating	Catalog	Catalog
Pin/Package	14TSSOP	20TSSOP
# Input Channels	2	4
	Samples	Samples
	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS1234: 24-Bit, Ultra Low-Noise Analog-to-Digital Converter
ADS1258: 24 Bit, Fast Channel Cycling Delta-Sigma ADC
ADS1110: 16-Bit Delta-Sigma ADC with internal reference, PGA and oscillator. I2C Serial Interface
ISO7240CF: Quad, 4/0, 25Mbps, Digital Isolator, Selectable Failsafe
DAC8532: 16-Bit, Dual Channel, Low Power D-to-A Converter W/ Serial I/F and Rail-to-Rail Voltage Output
ISO7240M: Quad Channel, 4/0, 150Mbps, Digital Isolator

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Product Information

Features

240SPS Data Rate with 4MHz Clock
20-Bit Effective Resolution
Input Multiplexer with Four Differential Channels
Pin-Selectable, High-Impedance Input Buffer
±5V Differential Input Range
0.0003% INL (typ), 0.0015% INL (max)
Self-Calibrating
Simple 2-Wire Serial Interface
On-Chip Temperature Sensor
Single Conversions with Standby Mode
Low Current Consumption: 300 µA
Analog Supply: 2.7V to 5.5V
Digital Supply: 2.7V to 5.5V
APPLICATIONS
- Hand-Held Instrumentation
- Portable Medical Equipment
- Industrial Process Control
- Weigh Scales

All trademarks are the property of their respective owners.

Description

The ADS1224 is a 4-channel, 24-bit, delta-sigma analog-to-digital (A/D) converter. It offers excellent performance and low power in a TSSOP-20 package. The ADS1224 is well-suited for demanding, high-resolution measurements, especially in portable systems and other space-saving and power-constrained applications.

A delta-sigma modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (mux) is used to select between four separate differential input channels. A buffer can be selected to increase the input impedance of the measurement.

A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1224 can be quickly shut down (Standby mode) while idle between measurements to dramatically reduce the overall power consumption. Multiple ADS1224s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1224 is designed to easily connect to microcontrollers, such as the MSP430.

The ADS1224 supports 2.7V to 5.5V analog supplies and 2.7V to 5.5V digital supplies. Power is typically less than 1mW in 3V operation and less than 1µW during Standby mode.

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	Footprints	Samples
ADS1224IPWR	ACTIVE	-40 to 85	4.35 \| 100u	TSSOP (PW) \| 20	View	2000 \| LARGE T&R	Purchase Samples
ADS1224IPWRG4	ACTIVE	-40 to 85	4.35 \| 100u	TSSOP (PW) \| 20	View	2000 \| LARGE T&R	Purchase Samples
ADS1224IPWT	ACTIVE	-40 to 85	4.80 \| 100u	TSSOP (PW) \| 20	View	250 \| SMALL T&R
ADS1224IPWTG4	ACTIVE	-40 to 85	4.80 \| 100u	TSSOP (PW) \| 20	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
ADS1224IPWR	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
	0*	1 \| 28 Jan	16 Weeks	None Reported View Distributors
	0*	>10k \| 4 Mar	16 Weeks
ADS1224IPWRG4	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
	0*	1 \| 28 Jan	16 Weeks	None Reported View Distributors
	0*	>10k \| 4 Mar	16 Weeks
ADS1224IPWT	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
	0*	>10k \| 2 Mar	16 Weeks	Asia	WPI	161
ADS1224IPWTG4	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
	0*	>10k \| 2 Mar	16 Weeks	Europe	Farnell	314
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
ADS1224IPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1224IPWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1224IPWT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1224IPWTG4	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 Analog-to-Digital Converter with 4-Channel Differential Input (Rev. B) (ads1224.pdf, 435 KB)
29 Feb 2008 Download

Application Notes

A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
12 Jan 2008 Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
24 May 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
Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (sbaa006.htm, 8 KB)
27 Sep 2000 Abstract
Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (sbaa005.htm, 8 KB)
27 Sep 2000 Abstract

View Application Notes for Analog to Digital Converters

User Guides

ADS1224EVM User's Guide (Rev. A) (sbau095a.pdf, 189 KB)
10 Oct 2007 Download

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
ADS1224 Evaluation Module	ADS1224EVM	Texas Instruments	Development Boards/EVMs

Alternative Products - Are similar to ADS1224
Part #	Name	Comments
ADS1234	24-Bit, Ultra Low-Noise Analog-to-Digital Converter	Functionally equivalent. With bridge type input configuration and onboard oscillator
ADS1240	24-Bit Analog-to-Digital Converter	Functionally equivalent. Excellent 50Hz and 60Hz rejection.
ADS1112	16-bit 240SPS ADC, 2 Ch. Diff/3 Single-end input, Low power Complete System in MSOP-10	16 bit, 2 channel version
ADS1225	24-bit, 100SPS ADC with Differential Input and Internal Oscillator	Single channel, with onboard oscillator version
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Complementary Products - Can be used with ADS1224
Part #	Name	Product Family	Comments
OPA365	2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier	PRECISION AMPLIFIERS- LOW OFFSET VOLTAGE	OPERATIONAL AMPLIFIER
OPA333	1.8V, 17uA, 2uV, microPOWER CMOS Zero-Drift Series Operational Amplifier	PRECISION AMPLIFIERS- LOW OFFSET VOLTAGE	OPERATIONAL AMPLIFIER
REF5025	Low Noise, Very Low Drift, Precision Voltage Reference	REFERENCES- SERIES VOLTAGE REFERENCES	SERIES VOLTAGE REFERENCE
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ISO7240CF	Quad, 4/0, 25Mbps, Digital Isolator, Selectable Failsafe	INTERFACE-ISOLATORS	TI customers also evaluated this product.
DAC8532	16-Bit, Dual Channel, Low Power D-to-A Converter W/ Serial I/F and Rail-to-Rail Voltage Output	DATA CONVERTERS-DIGITAL TO ANALOG CONVERTERS	TI customers also evaluated this product.
ISO7240M	Quad Channel, 4/0, 150Mbps, Digital Isolator	INTERFACE-ISOLATORS	TI customers also evaluated this product.
DAC8811	16-Bit, Serial Input Multiplying Digital to Analog Converter	DATA CONVERTERS-DIGITAL TO ANALOG CONVERTERS	TI customers also evaluated this product.

Related End Equipments

Programmable Logic Controller

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