Part A
ADS8568SPM
Texas Instruments
- Lifecycle
- Active
- Stock
- 3952 PCS
- Package
- LQFP-64
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8588SIPMR and ADS8568SPM are both 16-bit, 8-channel, simultaneous-sampling SAR ADCs from Texas Instruments in pin-compatible LQFP-64 packages, making them strong functional replacement candidates. The ADS8588SIPMR offers a higher per-channel throughput of 500 kSPS versus 510 kSPS aggregate on the ADS8568SPM, while both share the same analog input range and parallel/serial interface options. Designers should validate the reference configuration and timing margins before substituting, but overall the two parts are highly interchangeable for most multichannel data-acquisition designs.
Resolution and Channel Count
High match
Package and Pinout
High match
Sampling Rate
Validation required
Analog Input Range
High match
Parts at a glance
Part B
ADS8588SIPMR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4137 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 | ADS8588SIPMR | ADS8568SPM | 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 | 8 single-ended | 8 pseudo-differential / single-ended | Channel count and input configuration affect how many signals can be sampled and whether differential wiring is supported. |
| Maximum Sampling Rate | 500 kSPS | 500 kSPS | Throughput determines the highest signal bandwidth the system can digitize per channel. |
| Input Voltage Range | ±10 V (bipolar) | ±10 V (bipolar) | The full-scale input range must match the sensor or signal chain to avoid clipping or loss of dynamic range. |
| Supply Voltage | 5 V analog (AVDD), 2.7–5.5 V digital (DVDD) | 5 V analog (AVDD), 2.7–5.5 V digital (DVDD) | Supply requirements determine power-rail compatibility and whether the part can drop into an existing board design. |
| Interface Type | Parallel / Serial (SPI-compatible) | Parallel / Serial (SPI-compatible) | The host interface must match the controller's available bus to allow direct communication. |
| Package | LQFP-64 | LQFP-64 | Package and pinout compatibility are essential for physical board-level substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range must cover the application environment for reliable operation. |
| Internal Reference | Yes (with internal reference) | Yes (with internal reference) | An internal reference simplifies the design and affects accuracy and external component count. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8568SPM | 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 ADS8568SPM?
The ADS8588SIPMR is an 8-channel, 16-bit simultaneous-sampling SAR ADC with a maximum throughput of 500 kSPS per channel, while the ADS8568SPM 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 speed grade, package, and specified performance characteristics.
Are the ADS8588SIPMR and ADS8568SPM pin-to-pin compatible?
No. The ADS8588SIPMR is supplied in a 64-pin LQFP package, whereas the ADS8568SPM is supplied in a 64-pin LQFP package as well, but the two devices are distinct product families with different pin functions and timing specifications. A direct drop-in replacement should not be assumed; the PCB layout and interface timing must be validated against each device's datasheet.
What is the maximum sampling rate of each device?
The ADS8588SIPMR supports a maximum throughput of 500 kSPS per channel. The ADS8568SPM supports a maximum throughput of 510 kSPS per channel. Both are simultaneous-sampling devices, so all eight channels are converted at the same instant.
Do both devices support the same analog input ranges?
Both devices support bipolar analog input ranges of ±10 V, ±5 V, and ±2.5 V, configurable via the range pin. This makes them suitable for industrial measurement and protection applications requiring wide dynamic range and simultaneous sampling.
What digital interfaces do the ADS8588SIPMR and ADS8568SPM provide?
Both devices provide a parallel interface and a serial interface for host communication. The parallel interface supports 16-bit word access, and the serial interface supports daisy-chain operation for multi-device systems. The exact timing and mode configuration should be verified in the respective datasheets.
What are the typical applications for these ADCs?
Both the ADS8588SIPMR and ADS8568SPM are intended for industrial applications such as power quality measurement, protection relays, motor control, and multi-axis data acquisition, where simultaneous sampling of eight channels with 16-bit resolution is required.
What is the operating temperature range for these devices?
Both devices are specified for the industrial temperature range of –40°C to +125°C, making them suitable for harsh industrial environments. Designers should confirm the exact grade and qualification in the ordering information of each datasheet.
Can the ADS8588SIPMR and ADS8568SPM share the same reference and supply scheme?
Both devices integrate an internal reference and require an analog supply of 5 V and a digital supply of 3.3 V to 5 V. However, because they are different product families, the reference accuracy, drift, and decoupling requirements may differ; the power supply and reference design should be validated separately for each device.