Part A
ADS8568SPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 7064 PCS
- Package
- LQFP-64
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8588SIPMR and ADS8568SPMR are both 16-bit, 8-channel, simultaneous-sampling SAR ADCs from Texas Instruments in the same LQFP-64 package, making them strong functional replacement candidates. The ADS8588SIPMR offers a higher per-channel throughput of 500 kSPS versus 510 kSPS aggregate on the ADS8568SPMR, while both share comparable analog input ranges and supply architecture. Designers should validate the digital interface timing and reference configuration against the target system before substitution.
Resolution and Channel Count
High match
Package Type
High match
Sampling Rate
Validation required
Digital Interface
Validation required
Parts at a glance
Part B
ADS8588SIPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4137 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 | ADS8568SPMR | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and does not affect substitutability. |
| Number of Input Channels | 8 channels (single-ended) | 8 channels (6 single-ended + 2 differential, configurable) | Channel configuration differs; the ADS8568 supports differential inputs while the ADS8588S is single-ended only, affecting signal-chain design. |
| Maximum Sampling Rate | 500 kSPS | 500 kSPS | Identical throughput, so timing and bandwidth requirements are unaffected by substitution. |
| Input Voltage Range | ±10 V (bipolar, programmable) | ±10 V (bipolar, programmable) | Same wide bipolar input range supports industrial-level signals directly without external conditioning. |
| Supply Voltage | 5 V analog supply (AVDD), 2.7–5.5 V digital (DVDD) | 5 V analog supply (AVDD), 2.7–5.5 V digital (DVDD) | Matching supply rails simplify power design and allow drop-in replacement in existing boards. |
| Interface Type | Parallel and Serial (SPI-compatible) | Parallel and Serial (SPI-compatible) | Both offer flexible parallel/serial interfaces, so host-side communication compatibility is preserved. |
| Package | LQFP-64 | LQFP-64 | Identical package and pin count enable PCB footprint compatibility for substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same industrial temperature range ensures equivalent environmental robustness. |
| Internal Reference | Integrated 4.096 V reference | Integrated 4.096 V reference | Both include an on-chip reference, reducing external component count and simplifying design. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8568SPMR | ADS8588SIPMR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 500k | 200k |
| Number of Inputs | 8 | 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 ~ 5.5V | 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 ADS8568SPMR?
The ADS8588SIPMR is an 8-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 500 kSPS per channel, while the ADS8568SPMR is an 8-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 510 kSPS per channel. Both integrate eight SAR ADCs, a reference, and a parallel/serial interface, but they differ in specified speed grade, package, and some timing and performance specifications as defined in their respective datasheets.
Are the ADS8588SIPMR and ADS8568SPMR pin-compatible?
Both devices are offered in a 64-pin LQFP package (PMR suffix), and their pinouts are defined in their respective datasheets. Designers must verify pin function assignments and any differences in the datasheet pin configuration tables before considering a direct PCB replacement, since pin compatibility cannot be assumed solely from package similarity.
What is the maximum sampling rate of each device?
The ADS8588SIPMR supports a maximum throughput of 500 kSPS per channel, and the ADS8568SPMR supports a maximum throughput of 510 kSPS per channel, as specified in the manufacturer datasheets. Both are simultaneous-sampling devices, so all eight channels convert at the same rate.
Do both devices support both parallel and serial interfaces?
Yes. Both the ADS8588SIPMR and ADS8568SPMR provide a flexible parallel or serial digital interface, allowing connection to FPGAs, DSPs, and microcontrollers. The exact interface timing and mode configuration should be confirmed in each device's datasheet before finalizing the digital host design.
What is the analog input range and supply configuration for these ADCs?
Both devices support bipolar analog input ranges of ±10 V and ±5 V, and operate from a 5 V analog supply with a separate digital supply. The internal reference and input range configuration are set through device control registers; designers should consult the respective datasheet for the exact supply voltage ranges and reference specifications.
Can the ADS8588SIPMR and ADS8568SPMR be used interchangeably in an existing design?
They should not be treated as drop-in replacements without validation. Although both are 8-channel, 16-bit simultaneous-sampling SAR ADCs in the same 64-pin LQFP package, differences in specified throughput, timing, and performance parameters require the designer to verify register settings, interface timing, and accuracy requirements against the target device's datasheet before substitution.
What are the typical applications for these simultaneous-sampling ADCs?
Both devices are intended for applications requiring multi-channel simultaneous acquisition, such as power quality monitoring, protective relays, motor control, industrial data acquisition, and medical instrumentation. The simultaneous sampling architecture preserves phase relationships between channels, which is critical for these applications.