ADS1278 Status: ACTIVE

Octal, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC

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Datasheet

Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters (Rev. C) (ads1278.pdf, 1497 KB)
17 Oct 2008 Download

	ADS1174	ADS1178	ADS1271	ADS1274	ADS1278
Resolution(Bits)	16	16	24	24	24
Sample Rate (max)	52kSPS	52kSPS	105kSPS	128kSPS	128kSPS
Architecture	Delta-Sigma	Delta-Sigma	Delta-Sigma	Delta-Sigma	Delta-Sigma
Power Consumption(Typ)(mW)	135	245	92	275	530
SNR(dB)			109	111	111
SNR(Typ)(dB)	97	97
SFDR(dB)	+106	+106	-108	-109	-109
DNL(Max)(+/-LSB)	1	1	1	1	1
INL(Max)(+/-LSB)	0.0045%	0.0045%	0.0006%	0.0003%	0.0003%
No Missing Codes(Bits)	16	16	24	24	24
No. of Supplies	2	2	2	3	3
Analog Voltage AV/DD(Min)(V)	4.75	4.75	4.75	4.75	4.75
Analog Voltage AV/DD(Max)(V)	5.25	5.25	5.25	5.25	5.25
Logic Voltage DV/DD(Min)(V)	1.65	1.65	1.65	1.65	1.65
Logic Voltage DV/DD(Max)(V)	1.95	1.95	3.6	3.6	3.6
Input Configuration Range	Vref	Vref	1.06Vref	Vref	Vref
Reference Mode	Ext	Ext	Ext	Ext	Ext
Rating	Catalog	Catalog	Catalog	Catalog	Catalog
Pin/Package	64HTQFP	64HTQFP	16TSSOP	64HTQFP	64HTQFP
# Input Channels	4	8	1	4	8
	Samples	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS1274: Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC
ADS1258: 24 Bit, Fast Channel Cycling Delta-Sigma ADC
ADS1282: Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration
SN65LBC184: Transient Voltage Suppression Differential Transceiver
SN74HC04: Hex Inverters
TLV1117-33: Single Output LDO, 800mA, Fixed(3.3), Internal Current limit, Thermal Overload Protection

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Product Information

Features

Simultaneously Measure Four/Eight Channels
Up to 128kSPS Data Rate
AC Performance:
62kHz Bandwidth
111dB SNR (High-Resolution Mode)
–108dB THD
DC Accuracy:
0.8µV/°C Offset Drift
1.3ppm/°C Gain Drift
Selectable Operating Modes:
High-Speed: 128kSPS, 106dB SNR
High-Resolution: 52kSPS, 111dB SNR
Low-Power: 52kSPS, 31mW/ch
Low-Speed: 10kSPS, 7mW/ch
Linear Phase Digital Filter
SPI or Frame-Sync Serial Interface
Low Sampling Aperture Error
Modulator Output Option (digital filter bypass)
Analog Supply: 5V
Digital Core: 1.8V
I/O Supply: 1.8V to 3.3V
APPLICATIONS
- Vibration/Modal Analysis
- Multi-Channel Data Acquisition
- Acoustics/Dynamic Strain Gauges
- Pressure Sensors

PowerPAD is a trademark of Texas Instruments, Inc.
SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.

Description

Based on the single-channel ADS1271, the ADS1274 (quad) and ADS1278 (octal) are 24-bit, delta-sigma () analog-to-digital converters (ADCs) with data rates up to 128k samples per second (SPS), allowing simultaneous sampling of four or eight channels. The devices are offered in identical packages, permitting drop-in expandability.

Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop. As a result, they have limited signal bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker than respective industrial counterparts. The ADS1274 and ADS1278 combine these types of converters, allowing high-precision industrial measurement with excellent dc and ac specifications.

The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. These ADCs provide a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple.

Four operating modes allow for optimization of speed, resolution, and power. All operations are controlled directly by pins; there are no registers to program. The devices are fully specified over the extended industrial range (–40°C to +105°C) and are available in an HTQFP-64 PowerPAD package.

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
ADS1278IPAPR	ACTIVE	-40 to 105	29.95 \| 100u	HTQFP (PAP) \| 64	View	1000 \| LARGE T&R	Purchase Samples
ADS1278IPAPRG4	ACTIVE	-40 to 105	29.95 \| 100u	HTQFP (PAP) \| 64	View	1000 \| LARGE T&R	Purchase Samples
ADS1278IPAPT	ACTIVE	-40 to 105	32.95 \| 100u	HTQFP (PAP) \| 64	View	250 \| SMALL T&R
ADS1278IPAPTG4	ACTIVE	-40 to 105	32.95 \| 100u	HTQFP (PAP) \| 64	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
ADS1278IPAPR	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 \| 2 Jan	12 Weeks	Asia	WPI	722
ADS1278IPAPRG4	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 \| 2 Jan	12 Weeks	None Reported View Distributors
ADS1278IPAPT	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
	750*	181 \| 19 Nov	12 Weeks	Americas	Arrow	231
		>10k \| 2 Jan			DigiKey	893
					Mouser Electronics	270
					Newark	389
				Asia	WPI	75
ADS1278IPAPTG4	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
	750*	181 \| 19 Nov	12 Weeks	Europe	Spoerle	150
	750*	>10k \| 2 Jan	12 Weeks
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
ADS1278IPAPR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
ADS1278IPAPRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
ADS1278IPAPT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
ADS1278IPAPTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	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

Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters (Rev. C) (ads1278.pdf, 1497 KB)
17 Oct 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

ADS1278EVM/ADS1278EVM-PDK, ADS1178EVM/ADS1178EVM-PDK User's Guide (Rev. C) (sbau129c.pdf, 4002 KB)
11 Jul 2008 Download

View User Guides for Analog to Digital Converters

Simulation Models

IBIS Model
- ADS1278 IBIS Model (Rev. A) (scac098a.ibs, 220 KB)
  11 Aug 2008 ibis

More Literature

ADS1278EVM-PDK Readme Page Thank You Letter (slal164.pdf, 23 KB)
07 Dec 2007 Download
ADS1278EVM Readme Page Thank You Letter (slal163.pdf, 23 KB)
16 Nov 2007 Download

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
ADC1278EVM Evaluation Module	ADS1278EVM	Texas Instruments	Development Boards/EVMs
ADS1278EVM-PDK Evaluation Module	ADS1278EVM-PDK	Texas Instruments	Development Boards/EVMs
ADCPro(TM) Analog-to-Digital Converter Evaluation Software	ADCPRO	Texas Instruments	Application Software

Alternative Products - Are similar to ADS1278
Part #	Name	Comments
ADS1274	Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC	It is an 4-channel version of the ADS1278
ADS1258	24 Bit, Fast Channel Cycling Delta-Sigma ADC	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
ADS1271	24-Bit, 105kSPS Industrial Delta-Sigma ADC	Single channel version of the ADS1278
ADS1281	High Resolution 24-Bit Analog-to Digital Converter	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. Single channel higher resolution device
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 higher resolution device with onboard PGA
Customers Who Evaluated This Product Also Evaluated...
ADS1274	Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC	TI customers also evaluated this product.
ADS1258	24 Bit, Fast Channel Cycling Delta-Sigma ADC	TI customers also evaluated this product.
ADS1282	Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration	TI customers also evaluated this product.
ADS1178	Octal, Simultaneous Sampling, 16-Bit Analog-to-Digitalconverter	TI customers also evaluated this product.
ADS1256	24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC with Multiplexer	TI customers also evaluated this product.
ADS1255	24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC	TI customers also evaluated this product.
ADS1281	High Resolution 24-Bit Analog-to Digital Converter	TI customers also evaluated this product.
ADS1271	24-Bit, 105kSPS Industrial Delta-Sigma ADC	TI customers also evaluated this product.
ADS1158	16 bit, 16 Channel Fast Cycling 125kSPS Delta Sigma ADC	TI customers also evaluated this product.

Complementary Products - Can be used with ADS1278
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