Part A
ADS8509IDW
Texas Instruments
- Lifecycle
- Active
- Stock
- 2404 PCS
- Package
- SOIC-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8507IBDWG4 is a viable functional replacement candidate for the ADS8509IDW, sharing the same 16-bit SAR architecture, 5 V supply, and 20-pin SOIC footprint, though the designer must validate the differing input range and interface configuration before substitution.
Resolution and Architecture
High match
Package and Pinout
High match
Input Voltage Range
Validation required
Digital Interface Type
Validation required
Parts at a glance
Part B
ADS8507IBDWG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 7165 PCS
- Package
- SOIC-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS8507IBDWG4 | 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 how the signal source must be connected and whether common-mode rejection is available. |
| Number of Input Channels | 1 | 1 | Both are single-channel devices, so channel count does not affect substitutability. |
| Supply Voltage (Analog) | 5 V | 5 V | Identical analog supply requirements mean the same power rail can be reused. |
| Interface | SPI / Serial | SPI / Serial | Both use a serial SPI-compatible interface, simplifying drop-in replacement at the digital side. |
| Package / Mounting | SOIC-28 (DW) | SOIC-28 (DW) | Same package and footprint allow 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 environmental conditions. |
| Reference Type | Internal / External | Internal / External | Both support internal and external references, giving flexibility in system design. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8509IDW | ADS8507IBDWG4 |
|---|---|---|
| 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 ADS8507IBDWG4?
The ADS8509IDW is a 16-bit, 250 kSPS successive-approximation register (SAR) analog-to-digital converter with a parallel interface, supplied in a 28-pin SOIC package and specified over the industrial temperature range of -40°C to +85°C. The ADS8507IBDWG4 is a 16-bit, 400 kSPS SAR ADC with a parallel interface, supplied in a 28-pin SOIC package and specified over the industrial temperature range of -40°C to +85°C. The primary differences are the maximum sampling rate (250 kSPS versus 400 kSPS) and the corresponding device family designation.
Are the ADS8509IDW and ADS8507IBDWG4 pin-compatible?
Both devices are offered in the same 28-pin SOIC (DW) package and share the same pinout for the parallel data bus, control signals, and analog input functions as defined in their respective Texas Instruments datasheets. Designers should still verify the pin function assignments against the specific datasheet revision before laying out a common PCB footprint.
Can the ADS8509IDW be replaced by the ADS8507IBDWG4 in an existing design?
A direct substitution requires validation of the higher 400 kSPS sampling rate, timing parameters, and any differences in the digital interface timing against the target system. Because both parts are 16-bit parallel-interface SAR ADCs in the same package, the ADS8507IBDWG4 may serve as a functional replacement, but the design must be re-verified against the ADS8507 datasheet to confirm timing, power, and reference requirements are met.
What is the resolution and architecture of these two ADCs?
Both the ADS8509IDW and ADS8507IBDWG4 are 16-bit successive-approximation register (SAR) analog-to-digital converters, providing 16-bit resolution with no pipeline latency, as specified in their Texas Instruments datasheets.
What are the maximum sampling rates of the ADS8509IDW and ADS8507IBDWG4?
The ADS8509IDW has a maximum sampling rate of 250 kSPS, while the ADS8507IBDWG4 has a maximum sampling rate of 400 kSPS, according to their respective Texas Instruments datasheets.
What digital interface do these converters use?
Both the ADS8509IDW and ADS8507IBDWG4 provide a parallel digital output interface for transferring conversion results to a host processor or FPGA, as documented in their Texas Instruments datasheets.
What package and operating temperature range do these devices support?
Both the ADS8509IDW and ADS8507IBDWG4 are supplied in a 28-pin SOIC (DW) package and are specified for operation over the industrial temperature range of -40°C to +85°C, per their Texas Instruments datasheets.
Do both parts operate from the same analog and digital supply voltages?
Both devices are designed to operate from a single 5 V analog supply with a separate digital supply, as specified in their Texas Instruments datasheets. Designers should confirm the exact supply voltage ranges and reference configuration in the respective datasheet before finalizing a design.