Part A
ADS8588SIPM
Texas Instruments
- Lifecycle
- Active
- Stock
- 5425 PCS
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8588SIPM is a strong functional replacement candidate for the ADS8556IPMR, sharing the same 16-bit SAR architecture, 8-channel simultaneous-sampling input structure, and LQFP-64 footprint. Designers should validate the interface supply level and confirm timing margins against the target system before committing to production, as the two devices differ in maximum throughput rate and digital I/O voltage range.
Resolution and Architecture
High match
Channel Count and Input Configuration
High match
Maximum Sampling Rate
Validation required
Digital Interface Supply Voltage
Validation required
Parts at a glance
Part B
ADS8556IPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2848 PCS
- Package
- LQFP-64
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | ADS8556IPMR | ADS8588SIPM | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so nominal resolution is equivalent for substitutability. |
| Number of Input Channels | 6 single-ended (or 3 differential) | 8 single-ended (or 4 differential) | Channel count determines how many signals can be sampled; the ADS8588S offers two additional channels. |
| Maximum Sampling Rate | 630 kSPS | 500 kSPS | Sampling rate affects achievable bandwidth and timing margin in the application. |
| Input Voltage Range | ±10 V (bipolar, configurable) | ±10 V (bipolar, configurable) | Matching input ranges allow direct substitution without front-end redesign. |
| Supply Voltage | 5 V analog (AVDD), 2.7–5.5 V digital (DVDD) | 5 V analog (AVDD), 2.7–5.5 V digital (DVDD) | Compatible supply rails simplify power design when swapping parts. |
| Interface Type | Parallel and Serial (SPI) | Parallel and Serial (SPI) | Both support parallel and serial interfaces, easing host-side compatibility. |
| Package | 64-pin LQFP (PM) | 64-pin LQFP (PM) | Identical package and pin count enable drop-in PCB compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | The wider temperature range of the ADS8588S suits harsher environments. |
| Internal Reference | Yes (with REFIO) | Yes (with REFIO) | Both integrate a reference, reducing external component count. |
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 | ADS8588SIPM | ADS8556IPMR |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS8588 | - |
| Number of Bits | 16 | 16 |
| Sampling Rate (Per Second) | 200k | - |
| 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 | - |
| 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 |
| Mounting Type | Surface Mount | - |
| Packaging | Tray | - |
| Sampling Rate(Per Second) | - | 630k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the key architectural differences between the ADS8556IPMR and ADS8588SIPM?
The ADS8556IPMR is a 6-channel, 16-bit successive-approximation register (SAR) ADC with a maximum throughput of 630 kSPS per channel in six-channel mode, featuring true bipolar input ranges of ±4 V, ±8 V, and ±12 V. The ADS8588SIPM is an 8-channel, 16-bit SAR ADC with an integrated analog front end, offering a maximum throughput of 500 kSPS per channel and a fixed ±10 V bipolar input range. The ADS8556 provides six simultaneous-sampling channels, while the ADS8588S provides eight simultaneously sampled channels.
Are the ADS8556IPMR and ADS8588SIPM pin-to-pin or package compatible?
No. The ADS8556IPMR is supplied in a 64-pin LQFP (PM package), while the ADS8588SIPM is supplied in a 64-pin LQFP (PM package) as well, but the pin functions and internal signal assignments differ between the two devices. A direct drop-in replacement is not supported; the PCB layout and pin connections must be reviewed against each device's datasheet before substitution.
How do the input voltage ranges of the ADS8556IPMR and ADS8588SIPM compare?
The ADS8556IPMR supports software-selectable bipolar input ranges of ±4 V, ±8 V, and ±12 V, allowing flexibility for different signal amplitudes. The ADS8588SIPM provides a fixed ±10 V bipolar input range with an integrated analog front end. Designs requiring selectable input ranges should favor the ADS8556, while fixed ±10 V systems may use the ADS8588S.
What are the maximum sampling rates of the ADS8556IPMR and ADS8588SIPM?
The ADS8556IPMR achieves up to 630 kSPS per channel when operating in six-channel mode (and up to 500 kSPS in other channel configurations, per the datasheet). The ADS8588SIPM supports a maximum throughput of 500 kSPS per channel across all eight channels. Both devices use a SAR architecture with simultaneous sampling.
Do both devices include an integrated analog front end and reference?
The ADS8588SIPM integrates an analog front end including input amplifiers, overvoltage protection, and a reference, simplifying system design for eight-channel ±10 V applications. The ADS8556IPMR integrates a reference and input amplifiers but does not include the same integrated AFE feature set as the ADS8588S. Designers should consult each datasheet for the exact integrated feature list.
Which device is better suited for higher channel-count simultaneous sampling?
The ADS8588SIPM provides eight simultaneously sampled channels, making it preferable for applications requiring eight-channel simultaneous acquisition. The ADS8556IPMR provides six simultaneously sampled channels. For systems needing more than six simultaneous channels, the ADS8588S is the appropriate choice within this comparison.
What are the supply and interface considerations when comparing these two ADCs?
Both devices operate from a 5 V analog supply with a separate digital supply and provide a parallel interface for data readout. The ADS8556IPMR supports a flexible parallel or serial interface depending on configuration, while the ADS8588SIPM provides a parallel interface. Exact supply rails, reference voltage, and interface timing must be verified in the respective datasheets before design migration.