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 ADS8342IBPFBRG4 are not drop-in replacements for one another. They differ in resolution, channel architecture, package footprint, and sample rate, so substituting one for the other requires a full schematic and layout redesign rather than a direct swap.
Different resolution
Different channel architecture
Different package footprint
Different sample rate
Parts at a glance
Part B
ADS8342IBPFBRG4
德州儀器
- Lifecycle
- Active
- Stock
- 7238 件
- Package
- TQFP-48
- 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 | ADS8342IBPFBRG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so resolution is equivalent and does not differentiate substitutability. |
| Number of input channels | 6 (3 differential) | 4 (2 differential) | Channel count determines how many signals can be sampled; the ADS8365 offers more channels, affecting system architecture. |
| Sampling rate (max) | 250 kSPS | 250 kSPS | Identical maximum throughput means both suit similar signal bandwidth requirements. |
| Interface type | Parallel | SPI / Serial | The digital interface must match the host controller; parallel vs serial is a major architectural difference affecting pinout and firmware. |
| Supply voltage (analog) | 5 V | 5 V | Matching analog supply simplifies power rail design and ensures comparable input range. |
| Package / mounting | TQFP-64 (surface mount) | TQFP-48 (surface mount) | Different package footprints require PCB redesign; they are not drop-in compatible. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range supports use in the same environmental conditions. |
| Input type | Differential (pseudo-differential capable) | Differential | Input configuration affects noise immunity and signal conditioning requirements in the analog front end. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8365IPAGR | ADS8342IBPFBRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 250k | 250k |
| Number of Inputs | 6 | 4 |
| 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 |
| Voltage - Supply, Analog | 5V | ±5V |
| Voltage - Supply, Digital | 5V | ±5V |
| Features | Selectable Address, Simultaneous Sampling | Selectable Address |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the ADS8365IPAGR and ADS8342IBPFBRG4?
The ADS8365IPAGR is a 6-channel, 16-bit, simultaneous-sampling successive-approximation register (SAR) analog-to-digital converter with a maximum throughput of 250 kSPS per channel, housed in a TQFP-64 package. The ADS8342IBPFBRG4 is a 4-channel, 16-bit SAR ADC with a maximum throughput of 250 kSPS, housed in a TQFP-48 package. The ADS8365 provides six simultaneously sampled inputs, while the ADS8342 provides four.
Are the ADS8365IPAGR and ADS8342IBPFBRG4 pin-to-pin or package compatible?
No. The ADS8365IPAGR uses a 64-pin TQFP package, while the ADS8342IBPFBRG4 uses a 48-pin TQFP package. The differing pin counts and package footprints mean they are not drop-in replacements and require different PCB land patterns.
Do both devices support simultaneous sampling of all input channels?
Yes. Both the ADS8365IPAGR and ADS8342IBPFBRG4 are simultaneous-sampling SAR converters, meaning all of their respective input channels are sampled at the same instant, which preserves phase relationships between channels.
What is the maximum sampling rate of each device?
Both the ADS8365IPAGR and ADS8342IBPFBRG4 specify a maximum throughput of 250 kSPS. The ADS8365 achieves this per channel across its six channels, and the ADS8342 achieves this across its four channels.
What digital interface do the ADS8365IPAGR and ADS8342IBPFBRG4 use?
Both devices provide a parallel digital output interface for transferring conversion results to a host processor or FPGA. Designers should consult the respective manufacturer datasheets for the exact pin definitions and timing of the parallel bus on each part.
Can the ADS8342IBPFBRG4 directly replace the ADS8365IPAGR in an existing design?
No, not without redesign. Beyond the package and pin-count difference (48-pin versus 64-pin TQFP), the channel count differs (four versus six), so the host interface, PCB footprint, and channel mapping must be revalidated against the manufacturer datasheets before any substitution.
Which device is better suited for applications requiring more analog input channels?
The ADS8365IPAGR, with six simultaneous-sampling input channels, supports more analog inputs per device than the four-channel ADS8342IBPFBRG4. For systems needing more than four simultaneously sampled channels, the ADS8365 reduces the number of separate converter devices required.