Part A
ADS8363SRHBR
德州儀器
- Lifecycle
- Active
- Stock
- 3921 件
- Package
- VQFN-32
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS8363SRHBR and ADS8370IBRHPRG4 are not drop-in replacements for one another. The ADS8363SRHBR is a dual-channel, simultaneous-sampling 16-bit SAR ADC with a 2 MSPS aggregate rate, while the ADS8370IBRHPRG4 is a single-channel 16-bit SAR ADC with a 600 kSPS rate. They differ in channel count, sampling architecture, throughput, and package footprint, so a direct substitution is not feasible without a full system redesign.
Different channel count
Different sampling architecture
Different throughput
Different package footprint
Parts at a glance
Part B
ADS8370IBRHPRG4
德州儀器
- Lifecycle
- Active
- Stock
- 6383 件
- Package
- VQFN-28
- Series
- 資料獲取-模數轉換器（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 | ADS8370IBRHPRG4 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so nominal resolution is equivalent for precision measurement applications. |
| Number of Input Channels | 4 differential / 8 single-ended | 1 pseudo-differential | Channel count determines how many signals can be digitized; the ADS8363 supports multi-channel acquisition while the ADS8370 is single-channel. |
| Sampling Rate | 1 MSPS | 600 kSPS | Maximum throughput affects the bandwidth of signals that can be captured and the achievable update rate in a system. |
| Architecture | SAR | SAR | Both use SAR conversion, giving similar latency and no pipeline delay characteristics. |
| Interface | SPI / parallel | SPI | Interface compatibility determines whether the part can drop into an existing digital bus without redesign. |
| Supply Voltage | 5 V analog, 2.7–5.5 V digital | 5 V analog, 2.7–5.5 V digital | Supply requirements must match the board's available rails for direct substitution. |
| Input Type | Differential | Pseudo-differential | Differential inputs offer better common-mode rejection; pseudo-differential suits single-ended signal sources referenced to a common ground. |
| Package | VQFN-32 | VQFN-28 | Package footprint and pin count must match for PCB layout compatibility. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | The wider temperature range of the ADS8363 allows use in harsher environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8363SRHBR | ADS8370IBRHPRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 1M | 600k |
| Number of Inputs | 4, 8 | 1 |
| Input Type | Differential, Pseudo-Differential | Pseudo-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, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.3V ~ 3.6V, 5V | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Features | Simultaneous Sampling | - |
Frequently asked questions
What are the primary differences between the ADS8363SRHBR and the ADS8370IBRHPRG4?
The ADS8363SRHBR is a dual, 16-bit, 1-MSPS SAR ADC with four fully differential input channels (two per ADC) and a parallel/SPI-compatible interface, housed in a 32-pin VQFN (RHB) package. The ADS8370IBRHPRG4 is a single, 16-bit, 600-kSPS SAR ADC with one pseudo-differential input and a parallel interface, housed in a 28-pin VQFN (RHP) package. The ADS8363 offers higher throughput and dual simultaneous-sampling ADCs, while the ADS8370 provides a single-channel, lower-speed conversion path.
Are the ADS8363SRHBR and ADS8370IBRHPRG4 pin-to-pin or footprint compatible?
No. The ADS8363SRHBR uses a 32-pin VQFN (RHB) package, while the ADS8370IBRHPRG4 uses a 28-pin VQFN (RHP) package. The different pin counts and package body sizes mean the PCB land patterns and pin functions are not interchangeable, so a direct drop-in replacement is not possible without a board redesign.
How do the sampling rates and resolution of these two ADCs compare?
Both devices provide 16-bit resolution. The ADS8363SRHBR supports a maximum throughput of 1 MSPS per ADC (dual simultaneous sampling), while the ADS8370IBRHPRG4 supports a maximum throughput of 600 kSPS for its single channel. The ADS8363 therefore offers higher aggregate sampling capability for multi-channel applications.
What input channel configurations do the ADS8363SRHBR and ADS8370IBRHPRG4 support?
The ADS8363SRHBR provides four fully differential input channels organized as two pairs, allowing two simultaneous conversions per sampling instant. The ADS8370IBRHPRG4 provides a single pseudo-differential input channel. Designs requiring simultaneous multi-channel acquisition should use the ADS8363, while single-channel acquisition can use the ADS8370.
Do both devices support the same digital host interface?
No. The ADS8363SRHBR offers a flexible interface supporting both parallel and SPI-compatible serial communication, selectable by configuration. The ADS8370IBRHPRG4 provides a parallel digital interface. System designers must match the host controller interface to the selected device; the ADS8363 provides greater interface flexibility.
Can the ADS8370IBRHPRG4 be used as a substitute for the ADS8363SRHBR in an existing design?
Not directly. Beyond the package and pin-count differences, the ADS8370 provides only one pseudo-differential channel at 600 kSPS versus the ADS8363's four fully differential channels at 1 MSPS with dual simultaneous sampling. Substitution would require verifying channel count, input topology, throughput, interface mode, and PCB layout against the manufacturer datasheets, and would generally require a board redesign.
What are the typical applications for each device?
The ADS8363SRHBR is suited to multi-channel, simultaneous-sampling applications such as motor control, power monitoring, and multi-axis data acquisition where two ADCs sample in parallel. The ADS8370IBRHPRG4 is suited to single-channel, high-resolution acquisition such as industrial process control and instrumentation where 600 kSPS is sufficient. Selection should be based on channel count, simultaneity, throughput, and interface requirements documented in the respective datasheets.