ADS1234 Status: ACTIVE

24-Bit, Ultra Low-Noise Analog-to-Digital Converter

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Datasheet

24-Bit Analog-to-Digital Converter for Bridge Sensors (Rev. F) (ads1234.pdf, 649 KB)
18 Feb 2008 Download

Complete Front End Solutions for Weigh Scales (sbaa154.pdf, 336 KB)
14 Jun 2007 Download

	ADS1230	ADS1232	ADS1234
Resolution(Bits)	20	24	24
Sample Rate (max)	80SPS	80SPS	80SPS
Architecture	Delta-Sigma	Delta-Sigma	Delta-Sigma
Power Consumption(Typ)(mW)	4.3	2.1	2.1
DNL(Max)(+/-LSB)	1	1	1
INL(Max)(+/-LSB)	0.0006%	0.0002%	0.0002%
No Missing Codes(Bits)	20	24	24
ENOB(Bits)	19.5	23.5	23.5
No. of Supplies	2	2	2
Analog Voltage AV/DD(Min)(V)	2.7	2.7	2.7
Analog Voltage AV/DD(Max)(V)	2.3	5.3	5.3
Logic Voltage DV/DD(Min)(V)	2.7	2.7	2.7
Logic Voltage DV/DD(Max)(V)	5.3	5.3	5.3
Input Configuration Range	0.5Vref/PGA (1,2,64,128)	0.5Vref/PGA (1,2,64,128)	0.5Vref/PGA (1,2,64,128)
Reference Mode	Ext	Ext	Ext
Rating	Catalog	Catalog	Catalog
Pin/Package	16TSSOP	24TSSOP	28TSSOP
# Input Channels	1	2	4
	Samples	Samples	Samples
	Inventory	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

ADS1232: 24-Bit, Ultra Low-Noise Analog-to-Digital Converter
ADS1112: 16-bit 240SPS ADC, 2 Ch. Diff/3 Single-end input, Low power Complete System in MSOP-10
ADS1217: 8-Channel, 24-Bit Analog-To-Digital Converter
ISO721: Single 100Mbps Digital Isolator
MAX3232E: 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15kV IEC ESD Protection
TPS63001: 96% Buck-Boost Converter with 1.7A Current Switches, 3.3V fixed Output voltage in 3x3 QFN

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Product Information

Features

Complete Front-End for Bridge Sensors
Up to 23.5 Effective Bits
Onboard, Low-Noise PGA
RMS Noise:
17nV at 10SPS (PGA = 128)
44nV at 80SPS (PGA = 128)
19.2-Bit Noise-Free Resolution at Gain = 64
Over 100dB Simultaneous 50Hz and 60Hz Rejection
Flexible Clocking:
Low-Drift Onboard Oscillator (±3%) Optional External Crystal
Selectable Gains of 1, 2, 64, and 128
Easy Ratiometric Measurements—External Voltage Reference up to 5V
Selectable 10SPS or 80SPS Data Rates
Two-Channel Differential Input with Built-In Temperature Sensor (ADS1232)
Four-Channel Differential Input (ADS1234)
Simple Serial Digital Interface
Supply Range: 2.7V to 5.3V
-40°C to +105°C Temperature Range
APPLICATIONS
- Weigh Scales
- Strain Gauges
- Pressure Sensors
- Industrial Process Control

All trademarks are the property of their respective owners.

Description

The ADS1232 and ADS1234 are precision 24-bit analog-to-digital converters (ADCs). With an onboard, low-noise programmable gain amplifier (PGA), precision delta-sigma ADC and internal oscillator, the ADS1232/4 provide a complete front-end solution for bridge sensor applications including weigh scales, strain gauges and pressure sensors.

The input multiplexer accepts either two (ADS1232) or four (ADS1234) differential inputs. The ADS1232 also includes an onboard temperature sensor to monitor ambient temperature. The onboard, low-noise PGA has a selectable gain of 1, 2, 64, or 128 supporting a full-scale differential input of ±2.5V, ±1.25V, ±39mV, or ±19.5mV. The delta-sigma ADC has 23.5-bit effective resolution and is comprised of a 3rd-order modulator and 4th-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1232/4 can be clocked externally using an oscillator or a crystal. There is also an internal oscillator available that requires no external components. Offset calibration is performed on-demand and the ADS1232/4 can be put in a low-power standby mode or shut off completely in power-down mode. All of the features of the ADS1232/4 are operated through simple pin-driven control. There are no digital registers to program in order to simplify software development. Data are output over an easily-isolated serial interface that connects directly to the MSP430 and other microcontrollers.

The ADS1232 is available in a TSSOP-24 package and the ADS1234 is in a TSSOP-28. Both are fully specified from -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	Footprints	Samples
ADS1234IPW	ACTIVE	-40 to 105	4.50 \| 1ku	TSSOP (PW) \| 28	View	50 \| TUBE
ADS1234IPWG4	ACTIVE	-40 to 105	4.50 \| 1ku	TSSOP (PW) \| 28	View	50 \| TUBE
ADS1234IPWR	ACTIVE	-40 to 105	4.50 \| 1ku	TSSOP (PW) \| 28	View	2000 \| LARGE T&R	Purchase Samples
ADS1234IPWRG4	ACTIVE	-40 to 105	4.50 \| 1ku	TSSOP (PW) \| 28	View	2000 \| LARGE T&R	Purchase Samples

* 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
ADS1234IPW	As of 9:18 AM GMT, 05 Oct 2008			As of 9:18 AM GMT, 05 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	3718 \| 3 Nov	4 Weeks	Americas	Arrow	25
					Avnet	295
					DigiKey	158
					Mouser Electronics	30
					Newark	40
					Rochester Electronics	50
				Asia	WPI	49
ADS1234IPWG4	As of 9:18 AM GMT, 05 Oct 2008			As of 9:18 AM GMT, 05 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	3718 \| 3 Nov	4 Weeks	None Reported View Distributors
ADS1234IPWR	As of 9:18 AM GMT, 05 Oct 2008			As of 9:18 AM GMT, 05 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 1 Dec	6 Weeks	None Reported View Distributors
ADS1234IPWRG4	As of 9:18 AM GMT, 05 Oct 2008			As of 9:18 AM GMT, 05 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 1 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
ADS1234IPW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1234IPWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1234IPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS1234IPWRG4	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 for Bridge Sensors (Rev. F) (ads1234.pdf, 649 KB)
18 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

View User Guides for Analog to Digital Converters

White Papers

Complete Front End Solutions for Weigh Scales (sbaa154.pdf, 336 KB)
14 Jun 2007 Download

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 ADS1234
Part #	Name	Comments
ADS1230	20 Bit Delta Sigma ADC for Bridge Sensors	20bit single channel version
ADS1232	24-Bit, Ultra Low-Noise Analog-to-Digital Converter	2 channel version of ADS1234
ADS1241	24-Bit Analog-to-Digital Converter	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
ADS1243	24-Bit ADC, 8 Ch, PGA 1:128, 50/60 Hz Notch, 0.6 mW Power Consumption	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
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ADS1242	24-Bit ADC, 4 Ch, PGA 1:128, 50/60 Hz Notch, 0.6 mW Power Consumption	TI customers also evaluated this product.
ADS1216	24-Bit Analog-to-Digital Converter	TI customers also evaluated this product.
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ADS1241	24-Bit Analog-to-Digital Converter	TI customers also evaluated this product.

Complementary Products - Can be used with ADS1234
Part #	Name	Product Family	Comments
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Related End Equipments

Weigh Scale / Bridge Sensor

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