Part A
ADS8365IPAGR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 1786 個数
- Package
- TQFP-64
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The ADS8365IPAGR and ADS8342IPFBR are not drop-in replacements for one another. Although both are multi-channel SAR analog-to-digital converters, they differ in resolution, channel count, package footprint, and digital interface, so a direct board-level substitution is not possible without redesign.
Different resolution
Different channel count
Different package footprint
Different digital interface
Parts at a glance
Part B
ADS8342IPFBR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 9737 個数
- Package
- TQFP-48
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | ADS8342IPFBR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so resolution is equivalent and not a differentiator for 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 throughput means both can handle the same signal bandwidth requirements. |
| Input type | Differential (pseudo-differential capable) | Differential | Input configuration affects noise immunity and how sensor signals are interfaced. |
| Interface | Parallel (byte/word) | SPI / Serial | The digital interface must match the host controller; parallel vs serial is a major architectural difference. |
| Supply voltage (analog) | 5 V | 5 V | Same analog supply simplifies power design and allows drop-in compatibility in the analog domain. |
| Package | TQFP-64 | TQFP-48 | Different package footprints require PCB redesign; not pin-compatible. |
| Operating temperature range | -40 to +85 °C | -40 to +85 °C | Identical temperature ratings mean both suit the same industrial environments. |
| Reference type | External | External | Both require an external reference, so reference circuitry can be reused across designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8365IPAGR | ADS8342IPFBR |
|---|---|---|
| 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 differences between the ADS8365IPAGR and ADS8342IPFBR?
The ADS8365IPAGR is a 6-channel, 16-bit successive-approximation ADC with a maximum throughput of 250 kSPS, while the ADS8342IPFBR is a 4-channel, 16-bit SAR ADC with a maximum throughput of 250 kSPS. The ADS8365IPAGR offers six fully differential input channels, whereas the ADS8342IPFBR provides four single-ended or two differential input channels. Both operate from a 5 V analog supply and include an internal reference, but they differ in channel count, input configuration, and package (TQFP-64 for the ADS8365IPAGR vs TQFP-48 for the ADS8342IPFBR).
Are the ADS8365IPAGR and ADS8342IPFBR pin-compatible?
No. The ADS8365IPAGR is supplied in a 64-pin TQFP package, while the ADS8342IPFBR is supplied in a 48-pin TQFP package. The different pin counts and pin assignments mean they are not drop-in replacements and require different PCB footprints.
Can the ADS8365IPAGR and ADS8342IPFBR be used interchangeably in an existing design?
No, they cannot be used interchangeably without design changes. Beyond package and pinout differences, the ADS8365IPAGR provides six differential input channels while the ADS8342IPFBR provides four single-ended or two differential channels. The input architecture, channel count, and PCB land pattern differ, so schematic and layout modifications are required.
What are the resolution and sampling rate specifications for both devices?
Both the ADS8365IPAGR and ADS8342IPFBR are 16-bit SAR analog-to-digital converters with a maximum sampling rate of 250 kSPS. Resolution and throughput are therefore equivalent between the two parts.
How do the input channel configurations differ between the ADS8365IPAGR and ADS8342IPFBR?
The ADS8365IPAGR offers six fully differential input channels, making it suitable for simultaneous multi-channel differential signal acquisition. The ADS8342IPFBR offers four single-ended inputs or two differential inputs, providing fewer channels and a different input topology. The choice depends on the number of signals and whether differential or single-ended measurement is required.
Do both ADCs include an internal voltage reference?
Yes. Both the ADS8365IPAGR and ADS8342IPFBR integrate an internal voltage reference, which reduces external component count. Designers should still consult the respective datasheets for reference accuracy, drift, and buffering requirements in their specific application.
What are the package and operating temperature specifications for these two ADCs?
The ADS8365IPAGR is packaged in a 64-pin TQFP, and the ADS8342IPFBR is packaged in a 48-pin TQFP. Both are specified for the industrial temperature range of -40°C to +85°C, making them suitable for industrial instrumentation and data acquisition systems.
Which device is better suited for multi-channel differential data acquisition?
The ADS8365IPAGR is better suited for multi-channel differential data acquisition because it provides six fully differential input channels at 16-bit resolution and 250 kSPS. The ADS8342IPFBR, with four single-ended or two differential channels, is more appropriate for lower-channel-count applications where board space and a smaller 48-pin package are priorities.