Part A
ADS8365IPAGR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1786 Stückzahl
- Package
- TQFP-64
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS8365IPAGR and ADS8342IPFBT 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
ADS8342IPFBT
Texas Instruments
- Lifecycle
- Active
- Stock
- 9508 Stückzahl
- Package
- TQFP-48
- Series
- Datenerfassung mit Analog to Digital Converters (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 | ADS8342IPFBT | 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 / 6 single-ended) | 4 (4 single-ended / 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 | Throughput must meet the application's signal bandwidth; both match at 250 kSPS. |
| Input type | Differential (pseudo-differential capable) | Single-ended / differential | Input configuration affects noise immunity and how sensors are wired; differing flexibility impacts direct substitution. |
| Interface | Parallel (byte/word) | SPI / serial | The digital interface must match the host controller; parallel vs serial is a major incompatibility for drop-in replacement. |
| Supply voltage (analog) | 5 V | 5 V | Analog supply must match the signal range and board power rails; both use 5 V. |
| Package | TQFP-64 | TQFP-48 | Footprint and pin count must match the PCB layout; different packages prevent direct board-level substitution. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; both are industrial-grade. |
| Reference type | External | External | Reference configuration affects accuracy and external component count; both require an external reference. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8365IPAGR | ADS8342IPFBT |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| 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 primary differences between the ADS8365IPAGR and ADS8342IPFBT?
The ADS8365IPAGR is a 6-channel, 16-bit successive-approximation ADC with a maximum throughput of 250 kSPS, specified for operation from a single 5 V analog supply with a 2.5 V to 5 V digital supply, and offered in a TQFP-64 package. The ADS8342IPFBT is a 4-channel, 16-bit SAR ADC with a maximum throughput of 250 kSPS, operating from a single 5 V analog supply with a 2.7 V to 5.25 V digital supply, and offered in a TQFP-48 package. The key differences are channel count (6 vs 4), package footprint (TQFP-64 vs TQFP-48), and digital supply range.
Are the ADS8365IPAGR and ADS8342IPFBT pin-to-pin compatible?
No. The ADS8365IPAGR uses a 64-pin TQFP package while the ADS8342IPFBT uses a 48-pin TQFP package. The differing pin counts and package body sizes mean the PCB land patterns and pin assignments are not interchangeable, so a direct drop-in replacement is not possible without a board redesign.
Do both ADCs offer the same number of analog input channels?
No. The ADS8365IPAGR provides six analog input channels, whereas the ADS8342IPFBT provides four analog input channels. Designs requiring six single-ended or differential inputs cannot use the ADS8342IPFBT without external multiplexing.
What is the maximum sampling rate of each device?
Both the ADS8365IPAGR and the ADS8342IPFBT are specified with a maximum throughput of 250 kSPS. Neither device offers a throughput advantage over the other based on published datasheet specifications.
How do the analog and digital supply requirements compare?
Both devices operate from a 5 V analog supply. The ADS8365IPAGR supports a digital supply range of 2.5 V to 5 V, while the ADS8342IPFBT supports a digital supply range of 2.7 V to 5.25 V. Designs using a 2.5 V digital rail can interface directly to the ADS8365IPAGR but would need to verify compatibility with the ADS8342IPFBT's 2.7 V minimum digital supply.
What analog input configurations do these ADCs support?
The ADS8365IPAGR supports six input channels that can be configured as six single-ended inputs or three fully differential inputs. The ADS8342IPFBT supports four input channels configurable as four single-ended inputs or two differential inputs. The choice between the two depends on whether the application requires six single-ended, three differential, four single-ended, or two differential input channels.
Which device is better suited for a compact 4-channel acquisition design?
The ADS8342IPFBT is the more appropriate choice for a compact 4-channel design because it provides exactly four analog input channels in a smaller 48-pin TQFP package. The ADS8365IPAGR offers six channels in a larger 64-pin TQFP package, which would add unused channels and consume additional board area in a 4-channel application.
Can the ADS8342IPFBT replace the ADS8365IPAGR in an existing 6-channel design?
No. The ADS8342IPFBT has only four analog input channels versus six on the ADS8365IPAGR, and it uses a different 48-pin package versus the 64-pin package of the ADS8365IPAGR. A replacement would require external multiplexing to recover the two missing channels and a PCB redesign to accommodate the different footprint and pinout.