Part A
ADS8363SRHBR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3921 ПКС
- Package
- VQFN-32
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Not a drop-in replacement
The ADS8363SRHBR and ADS8328IRSAT are both dual-channel SAR ADCs, but they differ in resolution, sampling rate, analog input configuration, and digital interface, so they are not interchangeable without a full redesign of the analog front end and digital host interface.
Different resolution
Different sampling rate
Different input configuration
Different digital interface
Parts at a glance
Part B
ADS8328IRSAT
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3958 ПКС
- Package
- VQFN-16
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | ADS8363SRHBR | ADS8328IRSAT | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Number of Input Channels | 4 differential / 8 single-ended | 2 single-ended | Channel count determines how many signals can be sampled; the ADS8363 supports more inputs, affecting system architecture. |
| Sampling Rate | 1 MSPS | 500 kSPS | Maximum throughput affects the bandwidth of signals that can be digitized; the ADS8363 is twice as fast. |
| Interface Type | SPI / Serial | SPI / Serial | Both use a serial SPI interface, so host-side digital connectivity is compatible. |
| Supply Voltage | 2.7 V to 5.5 V (analog), 1.65 V to 5.5 V (digital) | 2.7 V to 5.5 V | Supply range determines compatibility with the system power rails; both support common 3.3 V and 5 V rails. |
| Input Type | Differential / Single-ended | Single-ended | Differential inputs improve noise immunity and dynamic range; the ADS8363 offers more flexibility than the single-ended ADS8328. |
| Package / Case | VQFN-32 (5x5 mm) | VQFN-16 (3x3 mm) | Footprint and pin count differ, so PCB layout and assembly are not drop-in compatible between the two parts. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the ADS8363 suits harsher environments; the ADS8328 is limited to standard industrial range. |
| Reference Type | External | External | Both require an external voltage reference, so reference design considerations are similar for either part. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8363SRHBR | ADS8328IRSAT |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 1M | 500k |
| Number of Inputs | 4, 8 | 2 |
| Input Type | Differential, Pseudo-Differential | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 2 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.3V ~ 3.6V, 5V | 1.65V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Features | Simultaneous Sampling | - |
Frequently asked questions
What are the key architectural differences between the ADS8363SRHBR and the ADS8328IRSAT?
The ADS8363SRHBR is a dual, 16-bit, 4-channel, simultaneous-sampling SAR ADC with a maximum throughput of 1 MSPS per channel, housed in a 40-pin VQFN (RHB) package. The ADS8328IRSAT is a single, 16-bit, 2-channel, multiplexed SAR ADC with a maximum throughput of 500 kSPS, housed in a 16-pin VQFN (RSA) package. The ADS8363 provides true simultaneous sampling on two channels, while the ADS8328 uses a multiplexed input architecture.
Are the ADS8363SRHBR and ADS8328IRSAT pin-to-pin or package compatible?
No. The ADS8363SRHBR uses a 40-pin VQFN (RHB) package, while the ADS8328IRSAT uses a 16-pin VQFN (RSA) package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
How do the sampling rates and input configurations compare?
The ADS8363SRHBR supports up to 1 MSPS per channel with two simultaneous-sampling channels (four single-ended inputs configurable as two differential pairs). The ADS8328IRSAT supports up to 500 kSPS with a single multiplexed 2-channel input. The ADS8363 is therefore suited to higher-speed, multi-channel simultaneous-sampling applications, while the ADS8328 targets lower-speed, single-channel multiplexed acquisition.
Do both devices support the same digital interface?
Both devices provide a serial SPI-compatible interface for configuration and data readout. However, the exact frame format, register set, and timing parameters differ between the two datasheets, so firmware and host interface logic must be validated against the respective manufacturer documentation before reuse.
What are the analog input voltage ranges for each device?
The ADS8363SRHBR supports a programmable input range of ±VREF (with VREF up to 2.5 V) in differential mode, providing a ±2.5 V full-scale range. The ADS8328IRSAT supports a 0 V to VREF unipolar input range with VREF up to 5 V. Designers must confirm the exact reference and input configuration against the official datasheets for their target operating conditions.
Which device is more appropriate for simultaneous multi-axis or multi-phase measurement?
The ADS8363SRHBR is the appropriate choice because it provides two simultaneous-sampling channels, which preserves phase relationships between signals such as motor current or multi-axis sensor outputs. The ADS8328IRSAT uses a single multiplexed input path and cannot sample two channels at the same instant.
Can the ADS8328IRSAT replace the ADS8363SRHBR in an existing design?
Not directly. The ADS8328IRSAT has fewer channels, a lower maximum throughput (500 kSPS vs. 1 MSPS), a different package and pinout, and a multiplexed rather than simultaneous-sampling architecture. Any substitution requires a full schematic, layout, firmware, and timing revalidation against the ADS8328IRSAT datasheet.