Part A
ADS8344NB
德州儀器
- Lifecycle
- Active
- Stock
- 5654 件
- Package
- SSOP-20
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS8341E and ADS8344NB are both 16-bit successive-approximation ADCs with a 4-wire SPI-compatible serial interface, making them functionally comparable in many designs. However, they differ in channel count, package footprint, and reference configuration, so the ADS8344NB is a viable functional replacement candidate only after validating channel requirements, board layout, and reference architecture.
Channel Count
Validation required
Resolution and Architecture
High match
Package Type
Validation required
Serial Interface
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS8341E | ADS8344NB | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Number of Input Channels | 4 single-ended / 2 differential | 8 single-ended / 4 differential | The ADS8344NB provides twice the channel count, which matters if the application needs to monitor more analog signals without an external multiplexer. |
| Sampling Rate | 100 kSPS | 100 kSPS | Identical throughput means timing and bandwidth requirements are met by either part. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Same supply range allows either device to operate in the same power domain. |
| Interface | SPI-compatible serial | SPI-compatible serial | Both use the same serial interface, simplifying firmware and host connection reuse. |
| Package | SSOP-16 (DBQ) | SSOP-20 (DB) | Different package footprints and pin counts mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Reference Input | External reference | External reference | Both require an external reference, so the same reference circuit approach can be reused. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings suit the same industrial environments. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344NB | ADS8341E |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 4, 8 | 2, 4 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 3.6V, 5V | 2.7V ~ 3.6V, 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V | 2.7V ~ 3.6V, 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS8341E and ADS8344NB?
The ADS8341E is a 16-bit, 4-channel successive-approximation ADC in a 16-pin SSOP package, while the ADS8344NB is a 16-bit, 8-channel ADC in a 20-pin SSOP package. The ADS8344NB provides twice the input channel count and additional package pins for the extra channels, but both share similar serial SPI-compatible interfaces and comparable sampling rates in the 100 kSPS class.
Are the ADS8341E and ADS8344NB pin-compatible?
No. The ADS8341E uses a 16-pin SSOP package, whereas the ADS8344NB uses a 20-pin SSOP package. The different pin counts and pin assignments mean they are not drop-in replacements and require different PCB footprints.
Do both devices use the same serial interface?
Yes. Both the ADS8341E and ADS8344NB use an SPI-compatible serial interface for communication with a host microcontroller or DSP, supporting similar serial clock, chip select, and data input/output signaling.
How do the input channel counts compare?
The ADS8341E provides 4 single-ended input channels (or 2 differential pairs), while the ADS8344NB provides 8 single-ended input channels (or 4 differential pairs). The ADS8344NB is preferable when more analog inputs must be monitored by a single converter.
What is the resolution and architecture of these ADCs?
Both the ADS8341E and ADS8344NB are 16-bit successive-approximation register (SAR) analog-to-digital converters, offering 16-bit resolution over their respective input channel configurations.
Can the ADS8341E be substituted with the ADS8344NB in an existing design?
Not directly. Although both are 16-bit SAR ADCs with serial interfaces, the difference in package size (16-pin vs 20-pin SSOP) and channel count means a redesign of the PCB layout and firmware channel addressing would be required before substitution.
Which device should be selected for an application requiring more analog inputs?
The ADS8344NB should be selected when more analog input channels are needed, since it offers 8 single-ended channels versus the 4 channels of the ADS8341E, while maintaining 16-bit resolution and a comparable serial interface.