Part A
ADS8555SPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2733 Stückzahl
- Package
- LQFP-64
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8555SPMR can serve as a functional replacement candidate for the ADS8588SIPMR in many precision multi-channel acquisition designs, provided the system timing budget accommodates the lower throughput and the host interface is validated for the different digital I/O configuration. Both devices share the same TQFP-64 footprint and comparable analog supply architecture, but the ADS8588SIPMR offers higher sampling rate and integrated features that the ADS8555SPMR does not match. Engineers should confirm serial timing, reference configuration, and power sequencing before committing to a drop-in substitution.
Sampling Rate
Validation required
Package Type
High match
Digital Interface
Validation required
Analog Input Configuration
High match
Parts at a glance
Part B
ADS8588SIPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4137 Stückzahl
- Package
- LQFP-64
- Series
- Datenerfassung mit Analog to Digital Converters (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 | ADS8555SPMR | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit, so nominal precision is equivalent for substitutability. |
| Number of ADC channels | 8 | 6 | Channel count determines how many analog inputs can be sampled; the ADS8588S offers two additional channels. |
| Sampling rate (max) | 500 kSPS | 630 kSPS | Maximum throughput affects the highest signal bandwidth the system can digitize. |
| Input type | Single-ended | Single-ended | Input configuration must match the sensor/amplifier front-end topology. |
| Analog supply voltage | 5 V | 5 V | Analog supply range must be compatible with the board's existing power rails. |
| Digital interface | Parallel / Serial (SPI) | Parallel / Serial (SPI) | Interface compatibility determines whether the part can drop into the existing host connection. |
| Package | LQFP-64 | LQFP-64 | Package footprint and pinout must match for a physical board-level substitution. |
| Operating temperature range | -40 to 125 °C | -40 to 125 °C | Temperature range must cover the target application's environmental conditions. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8555SPMR | ADS8588SIPMR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 630k | 200k |
| Number of Inputs | 6 | 8 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, Parallel | Parallel, Serial |
| Configuration | S/H-ADC | PGA-ADC |
| Ratio - S / H: ADC | 1:1 | 0:1 |
| Number of A/D Converters | 1 | 8 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 4.75V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V | 2.3V ~ 5.25V |
| 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 ADS8555SPMR?
The ADS8588SIPMR is an 8-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 500 kSPS per channel, while the ADS8555SPMR is a 6-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 630 kSPS per channel. The ADS8588S has 8 analog inputs versus 6 on the ADS8555S, and both integrate a bipolar input range, on-chip reference, and parallel/serial interfaces, but differ in channel count, speed, and package pinout.
Are the ADS8588SIPMR and ADS8555SPMR pin-to-pin compatible?
No. The ADS8588SIPMR is offered in a 64-pin LQFP package, while the ADS8555SPMR is offered in a 64-pin LQFP package as well, but the pin functions and channel assignments differ because the ADS8588S provides 8 channels and the ADS8555S provides 6 channels. A direct drop-in replacement is not supported; the PCB layout and pin connections must be reviewed against each respective datasheet.
Can the ADS8555SPMR be used as a substitute for the ADS8588SIPMR in an existing design?
Not directly. Although both are 16-bit simultaneous-sampling SAR ADCs with similar analog supply and interface options, the ADS8555SPMR has only 6 analog input channels versus 8 on the ADS8588SIPMR, and the pinout differs. Substitution requires verifying channel count requirements, PCB pin mapping, timing, and firmware configuration against the ADS8555S datasheet before use.
What are the maximum sampling rates of the ADS8588SIPMR and ADS8555SPMR?
The ADS8588SIPMR supports a maximum throughput of 500 kSPS per channel across its 8 simultaneous-sampling channels. The ADS8555SPMR supports a maximum throughput of 630 kSPS per channel across its 6 simultaneous-sampling channels. Both devices perform simultaneous conversion of all channels, making them suitable for multi-axis and multi-phase measurement applications.
Do both devices integrate an on-chip reference and what is its value?
Yes. Both the ADS8588SIPMR and ADS8555SPMR integrate an on-chip voltage reference. The ADS8588S features an internal reference of 2.5 V, and the ADS8555S also provides an internal 2.5 V reference, with the option to use an external reference. The internal reference supports the bipolar input ranges and reduces external component count.
What analog input ranges do the ADS8588SIPMR and ADS8555SPMR support?
Both devices support bipolar analog input ranges of ±10 V, ±5 V, and ±2.5 V, selectable via configuration. This makes them suitable for industrial signal acquisition where bipolar sensor and control-loop voltages are common. The input range selection is configured through the digital interface and must be set according to the application requirements.
What digital interfaces are available on the ADS8588SIPMR and ADS8555SPMR?
Both the ADS8588SIPMR and ADS8555SPMR provide a parallel interface and a serial interface for data readout. The parallel interface supports 16-bit word access, while the serial interface supports daisy-chain and multiple-device configurations. The interface mode is selected via dedicated configuration pins, allowing flexibility in connecting to FPGAs, DSPs, or microcontrollers.
What are the typical applications for the ADS8588SIPMR versus the ADS8555SPMR?
The ADS8588SIPMR, with 8 simultaneous-sampling channels, is typically used in multi-phase power monitoring, motor control with three-phase plus additional sensing, and multi-channel data acquisition systems. The ADS8555SPMR, with 6 channels and higher per-channel throughput, is typically used in three-phase power quality analyzers, protective relays, and multi-axis position feedback systems where six simultaneous channels are sufficient.