ADS8508 Status: ACTIVE

12-Bit 250kHz CMOS Analog-to-Digital Converter w/Serial Interface 2.5V Internal Reference

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Datasheet

12-Bit 250-KSPS Serial CMOS Sampling ADC (ads8508.pdf, 668 KB)
22 Sep 2005 Download

	ADS8508
Resolution(Bits)	12
Sample Rate (max)	250kSPS
Architecture	SAR
Power Consumption(Typ)(mW)	70
SINAD(dB)	73
SNR(dB)	73
SFDR(dB)	90
DNL(Max)(+/-LSB)	0.45
INL(Max)(+/-LSB)	0.45
No Missing Codes(Bits)	12
No. of Supplies	1
Analog Voltage AV/DD(Min)(V)	4.75
Analog Voltage AV/DD(Max)(V)	5.25
Logic Voltage DV/DD(Min)(V)	4.75
Logic Voltage DV/DD(Max)(V)	5.25
Input Configuration Range	+4V, 5V, 10V; +/-3.3V, 5V, 10V
Reference Mode	Int and Ext
Rating	Catalog
Pin/Package	20SOIC
Comments	Input Impedance is half of 7808
# Input Channels	1
	Samples
	Inventory

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ADS8509: 16-Bit 250kHz CMOS Analog-to-Digital Converter w/Serial Interface 2.5V Internal Reference
ADS8504: 12-Bit 250kHz CMOS Analog-to-Digital Converter w/Parallel Interface 2.5V Internal Reference
TS5A23157: Dual 10-Ohm SPDT Analog Switch
PGA204: Programmable Gain Instrumentation Amplifier
OPA2544: High-Voltage, High-Current Dual Operational Amplifier

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Product Information

Features

250-kHz SamplingRate
4-V, 5-V, 10-V, ±3.33-V, ±5-V, and ±10-V Input Ranges
73-dB SINAD With 45-kHz Input
±0.45 LSB Max INL
±0.45 LSB Max DNL, 12-Bits No Missing Codes
±1 LSB Bipolar Zero Errors
±0.4 PPM/°C Bipolar Zero Error Drift
Six Specified Input Ranges
SPI Compatible Serial Output with Daisy-Chain (TAG) Feature
5-V Supply
Pin-Compatible With ADS7808 (Low Speed) and 16-Bit ADS8509/7809
Uses Internal or External Reference
70-mW Typ Power Dissipation at 250 KSPS
20-Pin SO Package
Simple DSP Interface
APPLICATIONS
- Industrial Process Control
- Data Acquisition Systems
- Digital Signal Processing
- Medical Equipment
- Instrumentation

Description

The ADS8508 is a complete 12-bit sampling analog-to-digital (A/D) converter using state-of-the-art CMOS structures. It contains a complete 12-bit, capacitor-based, successive approximation register (SAR) A/D converter with sample-and-hold, reference, clock, and a serial data interface. Data can be output using the internal clock or can be synchronized to an external data clock. The ADS8508 also provides an output synchronization pulse for ease of use with standard DSP processors.

The ADS8508 is specified at a 250-kHz sampling rate over the full temperature range. Precision resistors provide various input ranges including ±10 V and 0 V to 5 V, while the innovative design allows operation from a single +5-V supply with power dissipation under 100 mW.

The ADS8508 is available in a 20-pin SO package, fully specified for operation over the industrial -40°C to 85°C temperature range.

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
ADS8508IBDW	ACTIVE	-40 to 85	9.95 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE
ADS8508IBDWG4	ACTIVE	-40 to 85	9.95 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE
ADS8508IBDWR	ACTIVE	-40 to 85	9.95 \| 1ku	SOIC (DW) \| 20	View	2000 \| LARGE T&R	Purchase Samples
ADS8508IBDWRG4	ACTIVE	-40 to 85	9.95 \| 1ku	SOIC (DW) \| 20	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
ADS8508IBDW	As of 9:16 AM GMT, 12 Oct 2008			As of 9:16 AM GMT, 12 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2000*	>10k \| 24 Nov	6 Weeks	Americas	Avnet	12
					DigiKey	48
					Mouser Electronics	231
					Newark	50
					Rochester Electronics	300
				Asia	WPI	60
				Europe	Spoerle	25
ADS8508IBDWG4	As of 9:16 AM GMT, 12 Oct 2008			As of 9:16 AM GMT, 12 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2000*	>10k \| 24 Nov	6 Weeks	Europe	Farnell	5
ADS8508IBDWR	As of 9:16 AM GMT, 12 Oct 2008			As of 9:16 AM GMT, 12 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2000*	>10k \| 24 Nov	6 Weeks	None Reported View Distributors
ADS8508IBDWRG4	As of 9:16 AM GMT, 12 Oct 2008			As of 9:16 AM GMT, 12 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2000*	>10k \| 24 Nov	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
ADS8508IBDW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS8508IBDWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS8508IBDWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
ADS8508IBDWRG4	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

12-Bit 250-KSPS Serial CMOS Sampling ADC (ads8508.pdf, 668 KB)
22 Sep 2005 Download

Application Notes

A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. A) (sbaa147a.htm, 8 KB)
12 Jan 2008 Abstract
Upgrading From ADS7808/09 to ADS8508/09 Devices (slaa356.htm, 8 KB)
12 Jun 2007 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
Jitter and SNR calculator(slac133.zip, 2 KB ) 24 Apr 2007 zip

Alternative Products - Are similar to ADS8508
Part #	Name	Comments
ADS8504	12-Bit 250kHz CMOS Analog-to-Digital Converter w/Parallel Interface 2.5V Internal Reference	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. Has a parallel output interface
ADS8509	16-Bit 250kHz CMOS Analog-to-Digital Converter w/Serial Interface 2.5V Internal Reference	The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 16 bit equivalent device
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Complementary Products - Can be used with ADS8508
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ADS8508 Status: ACTIVE

12-Bit 250kHz CMOS Analog-to-Digital Converter w/Serial Interface 2.5V Internal Reference

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