Part A
ADS8588SIPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4137 PCS
- Package
- LQFP-64
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8588SIPMR and ADS8555SPM are both 16-bit simultaneous-sampling SAR ADCs from Texas Instruments, but they differ in channel count, package, and analog supply range. The ADS8588SIPMR offers eight channels in an LQFP-64 package, while the ADS8555SPM provides six channels in an LQFP-64 package. Both support parallel and serial interfaces and operate over the industrial temperature range, making the ADS8555SPM a viable functional candidate only where two fewer channels and a narrower analog supply are acceptable; otherwise, validation of channel count and supply requirements is required before substitution.
Channel Count
Validation required
Resolution
High match
Package Type
High match
Analog Supply Range
Validation required
Parts at a glance
Part B
ADS8555SPM
Texas Instruments
- Lifecycle
- Active
- Stock
- 8068 PCS
- Package
- LQFP-64
- 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 | ADS8588SIPMR | ADS8555SPM | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit, so nominal quantization accuracy is equivalent for substitutability. |
| Number of ADC channels | 8 | 6 | Channel count determines how many analog inputs can be sampled; the ADS8588SIPMR offers two additional channels. |
| Sampling rate (max) | 500 kSPS | 630 kSPS | Maximum throughput affects the highest signal bandwidth the system can digitize; the ADS8555SPM samples faster. |
| Input type | Single-ended | Single-ended | Input configuration must match the sensor/front-end topology; both accept single-ended signals. |
| Supply voltage (analog) | 5 V | 5 V | Analog supply compatibility ensures the part can drop into the same power rail without redesign. |
| Interface | Parallel / Serial (SPI) | Parallel / Serial (SPI) | Digital interface must match the host controller; both support parallel and serial modes for flexible integration. |
| Package | LQFP-64 | LQFP-64 | Package footprint and pinout affect PCB layout compatibility for a direct board-level swap. |
| Operating temperature range | -40 to +125 °C | -40 to +125 °C | Temperature range must cover the application environment; both are rated for industrial/extended use. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8588SIPMR | ADS8555SPM |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 200k | 630k |
| Number of Inputs | 8 | 6 |
| Input Type | Single Ended | Single Ended |
| Data Interface | Parallel, Serial | SPI, Parallel |
| Configuration | PGA-ADC | S/H-ADC |
| Ratio - S / H: ADC | 0:1 | 1:1 |
| Number of A/D Converters | 8 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 4.75V ~ 5.25V | 5V |
| Voltage - Supply, Digital | 2.3V ~ 5.25V | 2.7V ~ 3.6V, 5V |
| Features | Simultaneous Sampling | Simultaneous Sampling |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the ADS8588SIPMR and ADS8555SPM?
The ADS8588SIPMR is an 8-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 500 kSPS per channel, while the ADS8555SPM is a 6-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 630 kSPS per channel. The ADS8588SIPMR offers two additional input channels, whereas the ADS8555SPM provides a higher per-channel sampling rate.
Do the ADS8588SIPMR and ADS8555SPM have the same package and pinout?
No. The ADS8588SIPMR is supplied in a 64-pin LQFP package, and the ADS8555SPM is supplied in a 64-pin LQFP package as well, but the two devices are not pin-compatible because their channel counts and pin functions differ. A direct drop-in replacement is not possible without PCB redesign and validation.
What input voltage range do these ADCs support?
Both devices support bipolar input ranges of ±10 V and ±5 V, as well as a unipolar 0 V to 10 V range, configured through the appropriate control settings. These ranges are specified in the respective manufacturer datasheets.
What is the maximum sampling rate of each device?
The ADS8588SIPMR supports a maximum throughput of 500 kSPS per channel across its 8 channels. The ADS8555SPM supports a maximum throughput of 630 kSPS per channel across its 6 channels. The higher per-channel rate of the ADS8555SPM may benefit applications requiring faster conversion on fewer channels.
What digital interfaces do the ADS8588SIPMR and ADS8555SPM provide?
Both devices provide a parallel interface and a serial interface for data readout, supporting flexible connection to host processors and FPGAs. The specific interface modes and timing requirements are detailed in the respective manufacturer datasheets.
Can the ADS8588SIPMR and ADS8555SPM operate from the same supply voltages?
Both devices use a 5 V analog supply and a separate digital supply that supports 2.7 V to 5.5 V logic levels, allowing direct interfacing with a range of host processors. Designers should confirm exact supply and reference requirements against the manufacturer datasheet for each device.
Which device is better suited for applications requiring more input channels?
The ADS8588SIPMR is better suited when more input channels are required, since it provides 8 simultaneous-sampling channels versus 6 channels on the ADS8555SPM. The ADS8555SPM may be preferred when fewer channels are acceptable and a higher per-channel sampling rate is beneficial.