Part A
ADS8365IPAGR
德州儀器
- Lifecycle
- Active
- Stock
- 1786 件
- Package
- TQFP-64
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS8365IPAGR and ADS8322YB/2K are not functionally interchangeable. The ADS8365IPAGR is a six-channel, simultaneous-sampling 16-bit SAR ADC in a TQFP-64 package, while the ADS8322YB/2K is a single-channel 16-bit SAR ADC in a TQFP-32 package. The differences in channel count, sampling architecture, package footprint, and digital interface make direct substitution impractical without a full system redesign.
Different channel count
Different sampling architecture
Different footprint
Different digital interface
Parts at a glance
Part B
ADS8322YB/2K
德州儀器
- Lifecycle
- Active
- Stock
- 9368 件
- Package
- TQFP-32
- 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 | ADS8365IPAGR | ADS8322YB/2K | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so nominal resolution is equivalent for substitutability. |
| Number of ADC Inputs / Channels | 6 single-ended (3 differential) | 1 single-ended | Channel count determines how many signals can be sampled; the ADS8365 supports multi-channel acquisition while the ADS8322 is single-channel. |
| Sampling Rate | 250 kSPS | 500 kSPS | Maximum throughput affects the bandwidth of signals that can be digitized; the ADS8322 offers twice the sample rate. |
| Input Type | Differential / pseudo-differential | Single-ended | Differential inputs improve noise immunity and common-mode rejection; single-ended is simpler but less robust in noisy environments. |
| Interface | Parallel | SPI / serial | The digital interface must match the host controller; parallel vs serial affects pin count, board layout, and firmware. |
| Supply Voltage | 5 V analog, 2.7–5.5 V digital | 5 V analog, 2.7–5.5 V digital | Supply requirements must be compatible with the system rails for direct replacement. |
| Package | TQFP-64 | TSSOP-16 | Package footprint and pin count differ significantly, so a board redesign is required for substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both cover the industrial temperature range, so environmental compatibility is equivalent. |
| Power Consumption | Approx. 150 mW (typical) | Approx. 85 mW (typical) | Power budget and thermal design differ; the ADS8322 is lower power, which may matter in portable or dense designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8365IPAGR | ADS8322YB/2K |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | - | microPOWER™ |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 250k | 500k |
| Number of Inputs | 6 | 1 |
| Input Type | Differential | Pseudo-Differential, Single Ended |
| Data Interface | Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 6 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Features | Selectable Address, Simultaneous Sampling | - |
Frequently asked questions
What are the key architectural differences between the ADS8365IPAGR and the ADS8322YB/2K?
The ADS8365IPAGR is a 16-bit, 6-channel, simultaneous-sampling successive-approximation register (SAR) analog-to-digital converter with a parallel interface, housed in a TQFP-64 package. The ADS8322YB/2K is a 16-bit, single-channel, pseudo-differential SAR ADC with a parallel interface, housed in a TQFP-32 package. The ADS8365IPAGR integrates six ADCs for simultaneous multi-channel acquisition, while the ADS8322YB/2K provides a single ADC channel.
Do the ADS8365IPAGR and ADS8322YB/2K have compatible package footprints for direct PCB replacement?
No. The ADS8365IPAGR uses a 64-pin TQFP package, while the ADS8322YB/2K uses a 32-pin TQFP package. The pin counts, package dimensions, and pin functions differ, so they are not footprint-compatible and cannot be directly substituted on the same PCB land pattern.
What are the maximum sampling rates of the ADS8365IPAGR and ADS8322YB/2K?
The ADS8365IPAGR supports a maximum throughput of 250 kSPS per channel with all six channels sampling simultaneously. The ADS8322YB/2K supports a maximum throughput of 500 kSPS for its single channel. The ADS8322YB/2K therefore offers a higher per-channel sampling rate, while the ADS8365IPAGR provides simultaneous sampling across six channels.
How do the input configurations of the ADS8365IPAGR and ADS8322YB/2K differ?
The ADS8365IPAGR provides six fully differential input channels, each with its own track-and-hold amplifier, enabling simultaneous sampling of six differential signals. The ADS8322YB/2K provides a single pseudo-differential input channel. Designs requiring multi-channel simultaneous differential acquisition should use the ADS8365IPAGR, while single-channel pseudo-differential acquisition can use the ADS8322YB/2K.
What digital interfaces do the ADS8365IPAGR and ADS8322YB/2K provide?
Both devices provide a parallel digital output interface. The ADS8365IPAGR outputs 16-bit conversion results for six channels over its parallel bus, while the ADS8322YB/2K outputs 16-bit conversion results for its single channel over its parallel bus. The bus width and control signal set differ between the two devices, so the host interface logic must be designed accordingly.
What are the analog supply voltage requirements for the ADS8365IPAGR and ADS8322YB/2K?
The ADS8365IPAGR operates from a 5 V analog supply (AVDD) with a separate digital supply (DVDD) in the 2.7 V to 5.5 V range. The ADS8322YB/2K operates from a single 5 V supply for both analog and digital functions. Designers should verify the exact supply rail requirements and decoupling recommendations in the respective manufacturer datasheets before layout.
Can the ADS8365IPAGR and ADS8322YB/2K be used interchangeably in an existing design?
No. The two devices differ in channel count (six versus one), package (64-pin TQFP versus 32-pin TQFP), input configuration (fully differential six-channel versus pseudo-differential single-channel), and maximum sampling rate (250 kSPS per channel versus 500 kSPS). Interchangeability would require a complete redesign of the analog front end, PCB footprint, and digital interface, and must be validated against the manufacturer datasheets for the target design.