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ADS8509IBDWR

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IC ADC 16BIT 20-SOIC

Part Number: ADS8509IBDWR

Manufacturer: Texas Instruments

Category: Analog to Digital Converters (ADC)

Package: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: ADS8509IBDWR.pdf

Description: IC ADC 16BIT 20-SOIC

Select Quantity Stock: 2,000

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

ADS8509IBDWR 16-Bit, 250-kSPS, 1-Ch SAR ADC with Programmable Input Ranges and SPI Interface

A comprehensive technical overview of the ADS8509IBDWR, a complete 16-bit sampling analog-to-digital converter from Texas Instruments featuring programmable input ranges, internal 2.5V reference, and a serial SPI interface. Covers device function, core features, electrical specifications, 20-lead SOIC package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 20-Lead SOIC (DW) 5V Analog / 5V Digital

Device Classification 16-Bit Sampling SAR ADC

Part Number: ADS8509IBDWR

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +85°C

PRODUCT OVERVIEW

What Is the ADS8509IBDWR?

ADS8509IBDWR is a complete 16-bit sampling analog-to-digital converter (ADC) from Texas Instruments utilizing state-of-the-art CMOS structures.[reference:0] The device contains a complete 16-bit successive approximation register (SAR) ADC with sample-and-hold, reference, clock, and a serial data interface, all integrated into a single package.[reference:1]

The ADS8509IBDWR supports programmable input ranges including ±10V, ±5V, ±3.3V, and unipolar 0V to 5V, providing flexibility for various signal conditioning requirements.[reference:2][reference:3] With a maximum sampling rate of 250 kSPS, the device delivers excellent DC accuracy with ±2 LSB INL (max, I-Grade) and ±1 LSB DNL (max, I-Grade), as well as outstanding AC performance with 88 dB SNR and –98 dB THD.[reference:4][reference:5]

The device operates from a single 5V supply for both analog and digital sections and features a 2.5V internal reference with the option for external reference input.[reference:6] Available in a 20-lead SOIC (DW) package, the ADS8509IBDWR is rated for operation from –40°C to +85°C and is offered in tape-and-reel packaging with 2,000 units per reel.[reference:7][reference:8]

16-Bit Resolution 250-kSPS sampling rate with ±2 LSB INL and ±1 LSB DNL (I-Grade) for high-accuracy measurements.[reference:9]

Programmable Input Ranges Supports ±10V, ±5V, ±3.3V, and unipolar 0V to 5V inputs for flexible signal conditioning.[reference:10][reference:11]

Serial SPI Interface Simple 3-wire SPI-compatible serial interface with 88 dB SNR and –98 dB THD.[reference:12][reference:13]

DEVICE HIGHLIGHTS

Key Features and Benefits of ADS8509IBDWR

16-Bit Resolution with 250 kSPS

16-bit SAR ADC with 250 kSPS maximum sampling rate and no missing codes guaranteed over the full operating temperature range.[reference:14]

Programmable Input Ranges

Supports ±10V, ±5V, ±3.3V, and unipolar 0V to 5V input ranges, configurable via pin strapping for maximum flexibility.[reference:15][reference:16]

Excellent AC & DC Performance

88 dB SNR, –98 dB THD, 99 dB SFDR, ±2 LSB INL (max, I-Grade), and ±1 LSB DNL (max, I-Grade) ensure high-quality signal acquisition.[reference:17][reference:18]

Single 5V Supply Operation

Operates from a single 5V supply for both analog and digital sections, simplifying power supply design.[reference:19]

Flexible Reference Options

Internal 2.5V reference with ±7 ppm/°C drift or optional external reference input for enhanced accuracy.[reference:20]

Compact 20-Pin SOIC Package

Available in a 20-lead SOIC (DW) package with tape-and-reel packaging (2,000 per reel) for automated assembly.[reference:21]

REFERENCE DATA

Technical Specifications for ADS8509IBDWR

Part Number	ADS8509IBDWR	Manufacturer	Texas Instruments
Device Type	16-Bit Sampling SAR ADC	Architecture	SAR (Successive Approximation Register)[reference:22]
Number of Bits	16 (No Missing Codes)[reference:23]	Sampling Rate	250 kSPS (Maximum)[reference:24]
Number of Inputs	1 (Single-Ended)[reference:25]	Input Voltage Range	Programmable: ±10V, ±5V, ±3.3V, 0V–5V[reference:26][reference:27]
Analog Supply Voltage	5V[reference:28]	Digital Supply Voltage	5V[reference:29]
INL (Integral Linearity, I-Grade)	±2 LSB (Max)[reference:30]	DNL (Differential Linearity, I-Grade)	±1 LSB (Max)[reference:31]
SNR (Signal-to-Noise Ratio)	88 dB (Typical)[reference:32]	THD (Total Harmonic Distortion)	–98 dB (Typical, I-Grade)[reference:33]
SFDR (Spurious-Free Dynamic Range)	99 dB (Typical)[reference:34]	SINAD	85 dB (Typical)[reference:35]
Reference Type	Internal 2.5V / External[reference:36]	Internal Reference Drift	±7 ppm/°C[reference:37]
Data Interface	SPI Serial[reference:38]	Power Dissipation	<100 mW (Typical)[reference:39]
Package	20-Lead SOIC (DW)[reference:40]	Package Body Size	12.80 mm × 7.50 mm[reference:41]
Mounting Type	Surface Mount[reference:42]	Operating Temperature	-40°C to +85°C[reference:43]
Moisture Sensitivity Level	MSL 2 (1 Year)[reference:44]	Lead Finish	NIPDAU[reference:45]
RoHS	ROHS3 Compliant[reference:46]	REACH	REACH Unaffected[reference:47]
ECCN	EAR99[reference:48]	HTSUS	8542.39.0030[reference:49]
Packaging	Tape & Reel (2,000 per Reel)[reference:50]	Product Status	Active[reference:51]

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use. I-Grade specifications apply to the ADS8509IBDWR variant.[reference:52]

DESIGN REFERENCE

Circuit Considerations for ADS8509IBDWR

Input Range & Reference Configuration

The ADS8509IBDWR offers flexible input range and reference configuration options:

Programmable Input Ranges: The device supports ±10V, ±5V, ±3.3V, and 0V–5V unipolar input ranges, selected via pin strapping.[reference:53][reference:54]
Internal Reference: 2.5V internal reference with ±7 ppm/°C drift provides a stable reference for most applications.[reference:55]
External Reference: Optional external reference can be applied to the REF pin for applications requiring enhanced accuracy.[reference:56]
Serial Interface: SPI-compatible 3-wire serial interface (CS, SCLK, SDI, SDO) for easy connection to microcontrollers and DSPs.[reference:57]
Input Impedance: The analog input impedance is 50 pF capacitance.[reference:58]

PCB and Power-Supply Guidance

ADC performance depends on layout, bypassing, and power supply quality:

Power Supply: Both analog and digital supplies are 5V (±5%). Separate analog and digital ground planes are recommended for optimal performance.[reference:59]
Bypass Capacitors: Place 0.1 µF and 10 µF decoupling capacitors close to the supply pins to minimize noise and ensure stable operation.
Reference Bypass: Connect a 1-µF capacitor from the CAP pin to ground when using the internal reference to filter noise.[reference:60]
Input Protection: For normal operation, the analog input should not exceed the configured range by more than ±20%.[reference:61]
Thermal Management: The device consumes less than 100 mW typical; ensure adequate PCB copper area for heat dissipation.[reference:62]
Digital Interface: Keep serial interface traces short and well-terminated to minimize noise coupling.
Verify the recommended PCB footprint from the official datasheet before production.

20-LEAD SOIC (DW)

Pin Configuration Reference for ADS8509IBDWR

ADS8509I B

SOIC (DW) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The DW package has 20 pins with 1.27mm pitch and a 12.80 mm × 7.50 mm body size.[reference:63] Device marking is "ADS8509I B" on the top of the package.

1 VANA Analog Supply Voltage - 5V

2 AGND Analog Ground

3 REF Reference Input/Output - 2.5V internal reference or external reference input

4 CAP Reference Bypass Capacitor - Connect 1µF capacitor to AGND[reference:64]

5 VINA Analog Input - Single-ended input to the ADC[reference:65]

6 AGND Analog Ground

7 VANA Analog Supply Voltage - 5V

8 R3 Input Range Select - Range bit 3 (MSB)

9 R2 Input Range Select - Range bit 2

10 R1 Input Range Select - Range bit 1

11 R0 Input Range Select - Range bit 0 (LSB)

12 CONV Conversion Start Input - Active low; initiates conversion

13 CS Chip Select Input - Active low; enables serial interface[reference:66]

14 SCLK Serial Clock Input - Clock for serial data transfer[reference:67]

15 SDI Serial Data Input - Data input for control register[reference:68]

16 SDO Serial Data Output - Data output for conversion results[reference:69]

17 BUSY Busy Output - Indicates conversion in progress

18 DGND Digital Ground

19 VDIG Digital Supply Voltage - 5V[reference:70]

20 NC No Connect - Not internally connected

APPLICATION AREAS

Typical Applications for ADS8509IBDWR

Industrial Automation & Process Control

High-precision analog-to-digital conversion for industrial sensors, PLCs, and process control systems.

Test & Measurement Equipment

High-accuracy data acquisition for laboratory instruments, oscilloscopes, and spectrum analyzers.

Medical Instrumentation

Precision signal acquisition for patient monitoring and diagnostic equipment.

Automotive Systems

Automotive sensor interfaces and battery monitoring systems requiring high-accuracy ADCs.

Data Acquisition Systems

Multichannel data acquisition with programmable input ranges for versatile signal conditioning.

ATE & Instrumentation

Automatic test equipment and high-precision instrumentation requiring 16-bit resolution and SPI interface.

REPLACEMENT GUIDANCE

Selecting an Alternative for ADS8509IBDWR

A replacement for the ADS8509IBDWR should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements. The following alternatives are documented in the official Texas Instruments datasheet (SLAS324C – OCTOBER 2004 – REVISED APRIL 2010).[reference:71]

Resolution (16-bit, no missing codes)[reference:72]

Sampling rate (250 kSPS)[reference:73]

Input ranges (Programmable ±10V, ±5V, ±3.3V, 0V–5V)[reference:74][reference:75]

Supply voltage (5V analog & digital)[reference:76]

Interface (SPI serial)[reference:77]

Package (20-lead SOIC, DW)[reference:78]

Temperature range (–40°C to 85°C)[reference:79]

Reference (Internal 2.5V or external)[reference:80]

Family alternatives:

Part Number	Package	Packaging	Temperature Range
ADS8509IBDWR	20-SOIC (DW)	Tape & Reel (2,000)[reference:81]	-40°C to 85°C[reference:82]
ADS8509IBDW	20-SOIC (DW)	Tube	-40°C to 85°C
ADS8509IDWR	20-SOIC (DW)	Tape & Reel[reference:83]	-40°C to 85°C
ADS8509IDB	28-SSOP (DB)[reference:84]	Tube	-40°C to 85°C
ADS8509IDBR	28-SSOP (DB)[reference:85]	Tape & Reel	-40°C to 85°C

All alternative part numbers listed above are documented in the official Texas Instruments datasheet. The ADS8509IBDWR features improved linearity specifications (±2 LSB INL max, ±1 LSB DNL max) compared to the standard ADS8509IDWR (±3 LSB INL max, ±2 LSB DNL max).[reference:86] Select based on INL/DNL requirements, package, and packaging needs.

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MANUFACTURER INFORMATION

Texas Instruments

The ADS8509 (ADS8509IBDWR) belongs to the precision ADC portfolio of Texas Instruments, originally developed by Burr-Brown. The device is a complete 16-bit sampling analog-to-digital converter using state-of-the-art CMOS structures with programmable input ranges and a serial SPI interface.[reference:87]

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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ADS8509IBDWR Technical Information

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Specifications

Product Attribute: Attribute Value

Part Number: ADS8509IBDWR

Manufacturer: Texas Instruments

Package: 20-SOIC (0.295", 7.50mm Width)

Series: -

Package/Case: 20-SOIC (0.295", 7.50mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Number of Bits: 16

Sampling Rate (Per Second): 250k

Number of Inputs: 1

Input Type: Single Ended

Data Interface: SPI

Configuration: S/H-ADC

Ratio - S/H:ADC: 1:1

Number of A/D Converters: 1

Architecture: SAR

Reference Type: External, Internal

Voltage - Supply, Analog: 5V

Voltage - Supply, Digital: 5V

Features: -

Operating Temperature: -40°C ~ 85°C

Supplier Device Package: 20-SOIC

Mounting Type: Surface Mount

Grade: -

Qualification: -

Frequently Asked Questions

1. How can I order ADS8509IBDWR from Haishengye Electronics?

Submit an RFQ directly on this page with your required quantity, target price and delivery requirements. Our sales team will review the request and provide a quotation.

2. How does Haishengye Electronics verify the quality of ADS8509IBDWR?

We work with qualified suppliers and review sourcing channels, traceability, packaging and product condition before shipment.

3. Are the stock and price of ADS8509IBDWR updated in real time?

Electronic component inventory and prices may change frequently. Displayed values are references, and final stock and pricing will be confirmed in the quotation.

4. Which payment methods are supported?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and destination.

5. How is international shipping arranged?

International shipping may be arranged through DHL, UPS, FedEx, TNT and other logistics channels. Tracking information will be provided after shipment.

6. What is the return or replacement process for ADS8509IBDWR?

Contact our sales team within the agreed period if there are quantity differences, incorrect items or clear external defects. Products should remain unused and in their original packaging.

7. Can I request technical support for ADS8509IBDWR?

Yes. Contact our team for datasheets, package details, product specifications, alternative parts and sourcing assistance.

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ADS8509IBDWR Procurement and Technical Support

ADS8509IBDWR is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number: ADS8509IBDWR

Manufacturer: Texas Instruments

Package: 20-SOIC (0.295", 7.50mm Width)

Category: Analog to Digital Converters (ADC)

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