Part A
ADS8588SIPM
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5425 PCS
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8588SIPM and ADS8555SPM are both 16-bit simultaneous-sampling SAR ADCs in a 64-pin LQFP package, making them strong functional replacement candidates. However, the ADS8588SIPM offers eight channels versus six on the ADS8555SPM, and the two devices differ in throughput and analog input architecture. Designers should validate channel count requirements, sampling rate headroom, and input configuration before substituting one for the other in an existing design.
Channel Count
Validation required
Resolution
High match
Package Type
High match
Sampling Rate
Validation required
Parts at a glance
Part B
ADS8555SPM
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 8068 PCS
- Package
- LQFP-64
- Series
- Data Acquisition - 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 | ADS8588SIPM | ADS8555SPM | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit, so nominal precision is equivalent for substitutability. |
| Number of ADC channels | 8 single-ended | 6 single-ended / 3 differential | Channel count and input topology determine how many signals can be sampled and whether differential inputs are available. |
| Maximum sampling rate | 500 kSPS | 630 kSPS | Sampling rate limits the maximum signal bandwidth and throughput the system can digitize. |
| Input voltage range | ±10 V, ±5 V | ±10 V, ±5 V | Matching input ranges allow the same sensor or front-end signal chain to be reused without redesign. |
| Supply voltage | 5 V analog (AVDD) | 5 V analog (AVDD) | Compatible analog supply simplifies power-rail reuse in an existing design. |
| Interface | Parallel / Serial (SPI) | Parallel / Serial (SPI) | Interface compatibility determines whether the host processor connection can remain unchanged. |
| Package | LQFP-64 | LQFP-64 | Same package footprint enables a drop-in board-level substitution without layout changes. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °C | Equivalent temperature ratings ensure both parts suit the same industrial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8588SIPM | ADS8555SPM |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | - | 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 | - | 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 |
| Base Product Number | ADS8588 | - |
| Sampling Rate (Per Second) | 200k | - |
| Number of A / D Converters | 8 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tray | - |
Frequently asked questions
What are the key architectural differences between the ADS8588SIPM and ADS8555SPM?
The ADS8588SIPM is an 8-channel, 16-bit simultaneous-sampling SAR ADC with integrated analog front-end, operating from a single 5 V supply. The ADS8555SPM is a 6-channel, 16-bit simultaneous-sampling SAR ADC that requires separate analog (5 V) and digital (3.3 V to 5 V) supplies. The ADS8588SIPM integrates input clamps, programmable gain amplifier, and low-pass filter, while the ADS8555SPM provides a simpler front-end with a wider analog input range option (±10 V or ±5 V).
How do the channel counts and sampling rates compare?
The ADS8588SIPM provides 8 simultaneous-sampling channels at up to 500 kSPS per channel. The ADS8555SPM provides 6 simultaneous-sampling channels at up to 630 kSPS per channel. The ADS8555SPM offers a higher per-channel throughput but fewer channels, while the ADS8588SIPM offers more channels at a slightly lower maximum rate.
Are the analog input ranges the same for both devices?
No. The ADS8588SIPM features a programmable input range of ±10 V or ±5 V with integrated PGA and input clamping. The ADS8555SPM supports a fixed ±10 V or ±5 V input range (selectable via configuration) but does not integrate a PGA or input clamp circuitry. Designers must provide external protection and scaling for the ADS8555SPM if needed.
What are the power supply requirements for each part?
The ADS8588SIPM operates from a single 5 V analog supply and includes an internal reference and digital interface supply. The ADS8555SPM requires a 5 V analog supply (AVDD) and a separate digital supply (DVDD) of 3.3 V to 5 V, plus an external reference or use of its internal reference. The dual-supply architecture of the ADS8555SPM allows flexible logic interfacing but requires additional supply sequencing considerations.
Do these ADCs support the same digital interface?
Both devices support a parallel interface for data readout. The ADS8588SIPM provides a 16-bit parallel interface with optional byte mode. The ADS8555SPM also provides a 16-bit parallel interface and additionally supports a serial interface (SPI-compatible) for reduced pin count. The ADS8588SIPM does not offer a serial interface option.
How do the packages and pinouts differ?
The ADS8588SIPM is offered in a 64-pin LQFP package. The ADS8555SPM is offered in a 64-pin LQFP package as well. Despite the same package footprint, the pin functions and pinouts are not identical, so PCB layouts must be designed specifically for each device. Direct drop-in replacement is not possible without layout changes.
Which device is better suited for high-channel-count simultaneous sampling?
The ADS8588SIPM is better suited for applications requiring 8 simultaneous channels, such as multi-axis motor control or three-phase power monitoring with additional sensors. The ADS8555SPM is better suited for 6-channel simultaneous sampling with higher per-channel throughput, such as certain power quality analyzers or protection relays where six channels (e.g., three voltage and three current) are sufficient.
Can the ADS8588SIPM and ADS8555SPM be used interchangeably in an existing design?
No. Although both are 16-bit simultaneous-sampling SAR ADCs in 64-pin LQFP packages, they differ in channel count (8 vs 6), supply architecture (single 5 V vs dual 5 V/3.3–5 V), input front-end (integrated PGA and clamps vs external), interface options (parallel only vs parallel and serial), and pinout. Interchangeability requires a full schematic and layout review against the respective datasheets.