Part A
ADS8509IDW
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 2404 PCS
- Package
- SOIC-20
- Series
- 데이터 수집 - 아날로그 변환기(ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8507IDWRG4 is a strong functional replacement candidate for the ADS8509IDW, sharing the same 16-bit SAR architecture, 250 kSPS throughput, and 5 V single-supply operation. Both devices are pin-compatible in the same 24-pin SOIC wide-body package, and the ADS8507 offers a superset input range configuration that covers the ADS8509 input span. Designers should validate the input range configuration and reference settings against the target application before final qualification.
Resolution and Architecture
High match
Sample Rate
High match
Package and Pinout
High match
Input Range Configuration
Validation required
Parts at a glance
Part B
ADS8507IDWRG4
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 8701 PCS
- Package
- SOIC-28
- Series
- 데이터 수집 - 아날로그 변환기(ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS8509IDW | ADS8507IDWRG4 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and not a differentiator for substitutability. |
| Sampling Rate | 250 kSPS | 400 kSPS | The ADS8507 offers a higher throughput, which matters if the application requires faster conversion cycles. |
| Input Type | Single-ended | Pseudo-differential | Input configuration affects signal conditioning and whether the part can reject common-mode noise in the application. |
| Number of Input Channels | 1 | 1 | Both provide a single channel, so channel count is not a differentiator. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Identical supply requirements simplify board-level substitution without power rail changes. |
| Interface | SPI / Serial | SPI / Serial | Matching serial interface allows drop-in replacement in most digital host designs. |
| Package | SOIC-28 (DW) | SOIC-28 (DW) | Same package footprint enables direct PCB substitution without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings mean both suit the same industrial environments. |
| Reference Type | Internal reference | Internal reference | Both include an internal reference, reducing external component count equally. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8509IDW | ADS8507IDWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 250k | 40k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI, Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS8509IDW and ADS8507IDWRG4?
The ADS8509IDW is a 16-bit successive-approximation ADC in a 28-pin SOIC (DW) package, specified for operation from a single 5 V supply with an on-chip reference and parallel/serial interface options. The ADS8507IDWRG4 is a 16-bit SAR ADC in a 28-pin SOIC package supplied in tape-and-reel form (RG4 suffix) and is specified for a 5 V analog supply. Both are 16-bit, 250 kSPS-class SAR converters from Texas Instruments, but they differ in interface configuration, reference options, and packaging/ordering format. Designers should confirm the exact interface mode, reference configuration, and package/ordering variant against the respective datasheets before substitution.
Are the ADS8509IDW and ADS8507IDWRG4 pin-compatible?
Both devices are offered in a 28-pin SOIC (DW) package, but pin compatibility must be verified against the pinout diagrams in the respective Texas Instruments datasheets. The two parts belong to related SAR ADC families but may differ in pin function assignments (for example, interface and reference pins). A direct drop-in replacement should only be attempted after confirming pin-for-pin equivalence from the official datasheets.
What is the resolution and sampling rate of these ADCs?
Both the ADS8509IDW and ADS8507IDWRG4 are 16-bit successive-approximation register (SAR) analog-to-digital converters. Their specified maximum sampling rate should be confirmed from the respective datasheets; the ADS8509 family is specified at 250 kSPS. Verify the exact throughput grade for each orderable part number in the manufacturer datasheet before finalizing a design.
What supply voltage do the ADS8509IDW and ADS8507IDWRG4 require?
Both devices are specified for a 5 V analog supply (AVDD = 5 V) with a separate digital supply (DVDD) that supports interfacing to 3 V or 5 V logic, as documented in the Texas Instruments datasheets. Confirm the exact supply ranges and decoupling requirements in the official datasheet for each part number.
What interface options are available on these converters?
The ADS8509IDW supports both parallel and serial interface modes, selectable via configuration, allowing connection to a variety of host processors and DSPs. The ADS8507IDWRG4 interface configuration should be verified from its datasheet, as the family offers serial and/or parallel options depending on the specific variant. Always confirm the interface mode and timing requirements from the official manufacturer documentation before designing the digital interface.
What does the RG4 suffix on the ADS8507IDWRG4 indicate?
The RG4 suffix denotes the packaging and ordering format: the device is supplied in tape-and-reel (reel size per TI ordering conventions) in the 28-pin SOIC (DW) package. The base part (ADS8507IDW) is typically supplied in tube form. The electrical specifications are defined by the base part number; the suffix indicates shipping format, not a change in silicon performance. Confirm reel quantity and packaging details in the TI datasheet or ordering information.
Can the ADS8507IDWRG4 be used as a drop-in replacement for the ADS8509IDW?
Not without verification. Although both are 16-bit SAR ADCs in 28-pin SOIC packages from Texas Instruments, differences in interface configuration, reference options, pin functions, and ordering format may exist. A substitution should only be made after comparing the pinout, interface timing, reference requirements, and electrical specifications of both datasheets and validating the replacement in the target design.
What reference configuration do these ADCs support?
The ADS8509IDW includes an on-chip reference and supports external reference operation, selectable by the designer, as described in its datasheet. The ADS8507IDWRG4 reference configuration (internal versus external) should be confirmed from its specific datasheet. Reference selection affects accuracy and drift performance, so verify the reference architecture and specifications for each part before finalizing the design.