ADS7870 Status: ACTIVE

12-Bit ADC, MUX, PGA and Internal Reference Data Acquisition System

Burr-Brown

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Datasheet

12-Bit ADC, MUX, PGA and Internal Reference Data Acquisition System (Rev. C) (ads7870.pdf, 495 KB)
19 Dec 2005 Download

	ADS7870
Resolution(Bits)	12
Sample Rate (max)	52kSPS
Architecture	Mux SAR, PGA
Power Consumption(Typ)(mW)	4.6
SINAD(dB)	72
DNL(Max)(+/-LSB)	0.5
INL(Max)(+/-LSB)	2
No Missing Codes(Bits)	12
No. of Supplies	1
Analog Voltage AV/DD(Min)(V)	2.7
Analog Voltage AV/DD(Max)(V)	5.25
Logic Voltage DV/DD(Min)(V)	2.7
Logic Voltage DV/DD(Max)(V)	5.25
Input Configuration Range	Vref/PGA(1,2,4,5,8,10,16,20)
Reference Mode	Int
Rating	Catalog
Pin/Package	28SSOP
# Input Channels	8
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS803: 12-Bit, 5 MSPS ADC Int/Ext Ref., flexible I/P between 2 and 5Vpp, Out of Range Indicator, pin comp.
ADS7822: 12-Bit, 200kSPS Micro Power Sampling Analog-To-Digital Converter
ADS1210: 24-Bit Analog-to-Digital Converter
TPS74401: Single Output LDO, 3.0A, Adj.(0.8 to 3.3V), Fast Transient Response, Programmable SoftStart
MPC509: 4-Channel Differential-Input Analog Multiplexer
TPS62112: 5-V, 1.5-A, 17-V Vin Step-Down Converter in QFN-16

More Related Products

Product Information

Features

PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20V/V
Programmable Input (Up to 4-channel Differential/Up to 8-channel Single-Ended or Some Combination)
1.15-V, 2.048-V or 2.5-V Internal Reference
SPI/DSP Compatible Serial Interface (≤20 MHz)
Throughput Rate: 52 kSamples/sec
Error/Overload Indicator
Programmable Output 2s Complement/Binary
2.7-V to 5.5-V Single-Supply Operation
4-Bit Digital I/O Via Serial Interface
Pin Compatible With ADS7871
SSOP-28 Package
APPLICATIONS
- Portable Battery-Powered Systems
- Low-Power Instrumentation
- Low-Power Control Systems
- Smart Sensor Applications

QSPI and SPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor Corporation.
All other trademarks are the property of their respective owners.

Description

The ADS7870 (US patents 6140872, 6060874) is a complete low-power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 12-bit successive approximation analog-to-digital (A/D) converter, and a precision voltage reference.

The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.

For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.

The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.

The ADS7870 contains an internal reference, which is trimmed for high initial accuracy and stability vs temperature. Drift is typically 10 ppm/°C. An external reference can be used in situations where multiple ADS7870s share a common reference.

The serial interface allows the use of SPI™, QSPI™, Microwire™, and 8051-family protocols, without glue logic.

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
ADS7870EA	ACTIVE	-40 to 85	4.15 \| 1ku	SSOP (DB) \| 28	View	50 \| TUBE	Contact TI Distributor or Sales Office
ADS7870EA/1K	ACTIVE	-40 to 85	4.15 \| 1ku	SSOP (DB) \| 28	View	1000 \| LARGE T&R	Purchase Samples
ADS7870EA/1KG4	ACTIVE	-40 to 85	4.15 \| 1ku	SSOP (DB) \| 28	View	1000 \| LARGE T&R	Purchase Samples
ADS7870EAG4	ACTIVE	-40 to 85	4.15 \| 1ku	SSOP (DB) \| 28	View	50 \| TUBE	Contact TI Distributor or Sales Office

* 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
ADS7870EA	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 28 Jan	12 Weeks	Americas	Arrow	>1k
					Avnet	1k
					DigiKey	>1k
					Mouser Electronics	764
					Newark	1k
				Europe	Spoerle	179
ADS7870EA/1K	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 28 Jan	12 Weeks	Americas	Arrow	>1k
ADS7870EA/1KG4	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 28 Jan	12 Weeks	None Reported View Distributors
ADS7870EAG4	As of 10:17 AM GMT, 19 Nov 2008			As of 10:17 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 28 Jan	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
ADS7870EA	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS7870EA/1K	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS7870EA/1KG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ADS7870EAG4	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

12-Bit ADC, MUX, PGA and Internal Reference Data Acquisition System (Rev. C) (ads7870.pdf, 495 KB)
19 Dec 2005 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
AB-174: Getting the Full Potential from your ADC (Rev. A) (sbaa069a.htm, 8 KB)
28 Jun 2002 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
Interfacing the ADS7870 and the MC68HC11E9 Analog to Microcomputer Made Easy (sbaa041.htm, 8 KB)
27 Sep 2000 Abstract

View Application Notes for Analog to Digital Converters

User Guides

ADS7870/ADS7871 EVM (slau113.htm, 8 KB)
09 Sep 2003 Abstract
DEM-ADS7870: Data Acquisition System for the ADS7870 (sbau005.pdf, 487 KB)
27 Sep 2000 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
ADS7870 Evaluation Module	ADS7870EVM	Texas Instruments	Development Boards/EVMs

Alternative Products - Are similar to ADS7870
Part #	Name	Comments
ADS7871	14-Bit 48KSPS DAS with ADC, MUX, PGA and Internal Reference	The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent. 14-bit equivalent device
Customers Who Evaluated This Product Also Evaluated...
ADS803	12-Bit, 5 MSPS ADC Int/Ext Ref., flexible I/P between 2 and 5Vpp, Out of Range Indicator, pin comp.	TI customers also evaluated this product.
ADS7822	12-Bit, 200kSPS Micro Power Sampling Analog-To-Digital Converter	TI customers also evaluated this product.
ADS1210	24-Bit Analog-to-Digital Converter	TI customers also evaluated this product.
ADS7871	14-Bit 48KSPS DAS with ADC, MUX, PGA and Internal Reference	TI customers also evaluated this product.
ADS8320	16-Bit, High-Speed, 2.7V to 5V Micro Power Sampling Analog-to-Digital Converter	TI customers also evaluated this product.
ADS1224	24-bit, 240SPS ADC with 4-ch Diff Input Mux, High-Z Buffer, Serial Output	TI customers also evaluated this product.

Complementary Products - Can be used with ADS7870
Customers Who Evaluated This Product Also Evaluated...
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