ADS7807UB Equivalent & Substitute Parts

Part Overview

The ADS7807UB is a 16-bit Analog to Digital Converter manufactured by Texas Instruments, designed for single-ended input data acquisition applications. It features a SAR (Successive Approximation Register) architecture with a 40 kSPS sampling rate, operating from a 5V supply in a 28-SOIC surface mount package. The device is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and long-term system support.

Key Parameters

Parameter	Value
Resolution (Bits)	16
Sampling Rate (kSPS)	40
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI, Parallel
Architecture	SAR
Analog Supply Voltage	5V
Digital Supply Voltage	5V
Operating Temperature Range	-40°C to 85°C
Package	28-SOIC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the ADS7807UB is determined by matching critical electrical and mechanical parameters: 16-bit resolution, SAR architecture, single-ended input capability, SPI/Parallel interface support, 5V supply compatibility, and surface mount packaging. The substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalent (ADS8507IBDW): Maintains identical electrical specifications including 40 kSPS sampling rate, 5V dual supply, single-ended input, and 28-SOIC package. Differs only in product status (Active vs. Last Time Buy) and moisture sensitivity level.

Manufacturer Recommended Substitute (ADS8685IPWR): Offers enhanced performance with 500 kSPS sampling rate and integrated PGA (Programmable Gain Amplifier), supporting both single-ended and pseudo-differential inputs. Operates in a smaller 16-TSSOP package with extended temperature range (-40°C to 125°C) and flexible digital supply (1.65V to 5.25V). Requires PCB layout redesign due to package change.

Parametric Equivalent (ADS8507IDW): Provides identical electrical performance to ADS8507IBDW with matching 40 kSPS sampling rate, 5V supply, and 28-SOIC package. Differs in packaging format (Tube) and moisture sensitivity level.

Parameter Comparison

Parameter	ADS7807UB	ADS8507IBDW	ADS8685IPWR	ADS8507IDW
Resolution (Bits)	16	16	16	16
Sampling Rate (kSPS)	40	40	500	40
Number of Inputs	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended, Pseudo-Differential	Single Ended
Data Interface	SPI, Parallel	SPI, Parallel	SPI	SPI, Parallel
Architecture	SAR	SAR	SAR	SAR
Analog Supply (V)	5	5	5	5
Digital Supply (V)	5	5	1.65–5.25	5
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 85
Package	28-SOIC	28-SOIC	16-TSSOP	28-SOIC
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Pin-Compatible Replacement: Select ADS8507IBDW or ADS8507IDW. Both maintain the 28-SOIC package footprint, identical electrical performance at 40 kSPS, and 5V supply requirements. These parts enable direct PCB substitution without layout modifications. ADS8507IBDW is preferred for new designs due to Active product status and improved moisture sensitivity rating (MSL 2 vs. MSL 3).

For Performance Enhancement: Select ADS8685IPWR when design specifications permit package migration from 28-SOIC to 16-TSSOP. This part delivers 12.5× higher sampling rate (500 kSPS), integrated PGA functionality, extended operating temperature range to 125°C, and flexible digital supply voltage. PCB redesign is required due to package change and reduced pin count.

For Long-Term Availability: All substitute parts carry Active product status with ROHS3 compliance and REACH unaffected certification, ensuring sustained supply and regulatory compliance. ADS8507IBDW and ADS8507IDW provide the most direct transition path with minimal design impact.

Frequently Asked Questions (FAQ)

Q: Can ADS8507IBDW replace ADS7807UB without PCB modifications? A: Yes. ADS8507IBDW is pin-compatible, operates at identical 40 kSPS sampling rate, and requires 5V analog and digital supplies matching the original design. No PCB layout changes are necessary.

Q: What is the difference between ADS8507IBDW and ADS8507IDW? A: Both parts are electrically identical with 40 kSPS sampling rate and 28-SOIC packaging. The primary differences are packaging format (Tube vs. Tube) and moisture sensitivity level (MSL 2 vs. MSL 2). Both are suitable for direct substitution.

Q: Why does ADS8685IPWR have a different package? A: ADS8685IPWR uses a 16-TSSOP package instead of 28-SOIC, resulting in a smaller footprint and reduced pin count. This package change enables integration of additional features including PGA and supports higher sampling rates (500 kSPS). PCB redesign is required for this substitution.

Q: Is ADS8685IPWR compatible with existing 5V-only designs? A: ADS8685IPWR supports 5V analog supply and flexible digital supply from 1.65V to 5.25V. It is compatible with 5V designs, but the SPI-only interface (no parallel option) and package change require design verification and potential firmware modifications.

Q: Are all substitute parts RoHS and REACH compliant? A: Yes. ADS8507IBDW, ADS8685IPWR, and ADS8507IDW are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part should I select for new production? A: For designs requiring pin-compatibility and minimal changes, select ADS8507IBDW (Active status, improved MSL rating). For new designs where package migration is feasible, ADS8685IPWR offers superior performance with 500 kSPS sampling rate and integrated PGA.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message