ADS1281 Status: ACTIVE

High Resolution 24-Bit Analog-to Digital Converter

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Datasheet

High-Resolution Analog-to-Digital Converter (Rev. B) (ads1281.pdf, 835 KB)
05 Aug 2008 Download

	ADS1281	ADS1282
Resolution(Bits)	32	32
Sample Rate (max)	4kSPS	4kSPS
Architecture	Delta-Sigma	Delta-Sigma
Power Consumption(Typ)(mW)	12	27
SNR(dB)	130	130
SNR(Typ)(dB)	130	130
SFDR(dB)	-123	-123
INL(Max)(+/-LSB)	0.00006%	0.00006%
No Missing Codes(Bits)	31	31
No. of Supplies	2	2
Analog Voltage AV/DD(Min)(V)	4.75	4.75
Analog Voltage AV/DD(Max)(V)	5.25	5.25
Logic Voltage DV/DD(Min)(V)	1.65	1.65
Logic Voltage DV/DD(Max)(V)	3.6	3.6
Input Configuration Range	0.5Vref	0.5Vref/PGA
Reference Mode	Ext	Ext
Rating	Catalog	Catalog
Pin/Package	24TSSOP	28TSSOP
# Input Channels	1	2
	Samples	Samples
	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS1282: Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration
ADS1271: 24-Bit, 105kSPS Industrial Delta-Sigma ADC
ADS1274: Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC
TLC5620: 8-Bit, 10 us Quad DAC, Serial Input, Pgrmable for 1x or 2x Output, Simultaneous Update, Low Power
TPS54386: Dual 3A Non-Synchronous Buck Converter with Integrated High Side MOSFET, 600 kHz
DAC7802: Dual Monolithic CMOS 12-Bit Multiplying Digital-to-Analog Converter

More Related Products

Product Information

Features

High Resolution:
- 130dB SNR (250SPS)
- 127dB SNR (500SPS)
High Accuracy:
- THD: -122dB (typ), -115dB (max)
- INL: 0.6ppm
Inherently Stable Modulator with Fast Responding Over-Range Detection
Flexible Digital Filter:
- Sinc + FIR + IIR (Selectable)
- Linear or Minimum Phase Response
- Programmable High-Pass Filter
- Selectable FIR Data Rates:250SPS to 4kSPS
Filter Bypass Option
Low Power Consumption:
- Operating: 12mW
- Shutdown: 10µW
Calibration Engine for Offset and
Gain Correction
SYNC Input
Analog Supply:
- Unipolar (+5V) or Bipolar (±2.5V)
Digital Supply: 1.8V to 3.3V
APPLICATIONS
- Energy Exploration
- Seismic Monitoring
- High-Accuracy Instrumentation

All other trademarks are the property of their respective owners

Description

The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed for the demanding needs of energy exploration and seismic monitoring environments. The single-chip design promotes board area savings for improvements in high-density applications.

The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post-processing filters.

The digital filter consists of sinc and finite impulse response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) stage. Selectable decimation provides data rates from 250 to 4000 samples per second (SPS). The FIR low-pass stage provides both linear and minimum phase response. The HPF features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.

The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1281s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.

Together, the modulator and filter dissipate only 12mW. The ADS1281 is available in a compact TSSOP-24 package and is fully specified from -40°C to +85°C, with a maximum operating range to +125°C.

Pricing / Packaging / CAD Design Tools / Samples

		Price	Packaging			CAD Design Tools		Samples
Device	Status	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
ADS1281IPW	ACTIVE	34.50 \| 1ku	TSSOP (PW) \| 24	View	60 \| TUBE	Purchase Samples
ADS1281IPWG4	ACTIVE	34.50 \| 1ku	TSSOP (PW) \| 24	View	60 \| TUBE	Purchase Samples
ADS1281IPWR	ACTIVE	28.75 \| 1ku	TSSOP (PW) \| 24	View	2000 \| LARGE T&R
ADS1281IPWRG4	ACTIVE	28.75 \| 1ku	TSSOP (PW) \| 24	View	2000 \| LARGE 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
ADS1281IPW	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*	4440 \| 17 Dec	4 Weeks	Americas	Arrow	60
		>10k \| 22 Dec			Mouser Electronics	110
					Newark	69
ADS1281IPWG4	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*	4440 \| 17 Dec	4 Weeks	None Reported View Distributors
	0*	>10k \| 22 Dec	4 Weeks
ADS1281IPWR	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
	4000*	>10k \| 22 Dec	12 Weeks	Americas	DigiKey	>1k
					Mouser Electronics	178
					Rochester Electronics	>1k
ADS1281IPWRG4	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
	4000*	>10k \| 22 Dec	12 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
ADS1281IPW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS1281IPWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS1281IPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS1281IPWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	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

High-Resolution Analog-to-Digital Converter (Rev. B) (ads1281.pdf, 835 KB)
05 Aug 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

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 ADS1281
Part #	Name	Comments
ADS1282	Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 4 channel version of ADS1281. Has onboard PGA
ADS1271	24-Bit, 105kSPS Industrial Delta-Sigma ADC	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. Has a lower sampling rate
ADS1274	Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 4 channel device. Lower sampling rate
ADS1278	Octal, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 8 channel device. Lower sampling rate
Customers Who Evaluated This Product Also Evaluated...
ADS1282	Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration	TI customers also evaluated this product.
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ADS1274	Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC	TI customers also evaluated this product.
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ADS1258	24 Bit, Fast Channel Cycling Delta-Sigma ADC	TI customers also evaluated this product.
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Part #	Name	Product Family	Comments
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ADS1281 Status: ACTIVE

High Resolution 24-Bit Analog-to Digital Converter

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