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 ADS8341EB/2K5G4 is a viable functional replacement candidate for the ADS8344NB in many designs, as both are 16-bit SAR ADCs with similar resolution and serial interface architecture. However, the ADS8341 offers fewer input channels and a narrower supply voltage range, so engineers must validate channel count requirements and confirm supply compatibility before substituting in existing layouts.
Resolution
High match
Input Channel Count
Not compatible
Supply Voltage Range
Validation required
Serial Interface Type
High match
Parts at a glance
Part B
ADS8341EB/2K5G4
德州儀器
- Lifecycle
- Active
- Stock
- 7122 件
- Package
- SSOP-16
- 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 | ADS8344NB | ADS8341EB/2K5G4 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and not a differentiator for substitutability. |
| Number of Input Channels | 8 single-ended / 4 differential | 4 single-ended / 2 differential | Channel count determines how many signals can be multiplexed into one ADC; the ADS8344 supports twice as many inputs. |
| Sampling Rate | 100 kSPS | 200 kSPS | Maximum throughput affects the ability to capture faster-changing signals; the ADS8341 offers higher sample rate. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Both operate over the same wide supply range, allowing similar system-level power design. |
| Interface Type | SPI / QSPI / Microwire compatible serial | SPI / QSPI / Microwire compatible serial | Identical serial interface simplifies drop-in replacement at the digital communication level. |
| Package | 20-pin SSOP (DBQ) | 16-pin SSOP (DBQ) | Different pin counts and footprints mean the PCB layout must be redesigned; they are not pin-compatible. |
| Input Type | Single-ended or differential | Single-ended or differential | Both support pseudo-differential and single-ended configurations, offering flexibility for sensor front-ends. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range supports use in similar environmental conditions. |
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 | ADS8341EB/2K5G4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| 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 ADS8344NB and the ADS8341EB/2K5G4?
The ADS8344NB is a 16-bit, 8-channel successive-approximation ADC in a 20-pin PDIP package, while the ADS8341EB/2K5G4 is a 16-bit, 4-channel SAR ADC in a 16-pin SSOP package supplied in tape-and-reel form. The ADS8344NB provides twice the input channel count, whereas the ADS8341EB/2K5G4 offers a smaller footprint and reel packaging suited to automated assembly.
Are the ADS8344NB and ADS8341EB/2K5G4 pin-compatible?
No. The ADS8344NB uses a 20-pin PDIP package and the ADS8341EB/2K5G4 uses a 16-pin SSOP package, so they differ in pin count, package dimensions, and PCB land pattern. They are not drop-in replacements for one another.
Do both devices share the same resolution and sampling architecture?
Yes. Both are 16-bit successive-approximation register (SAR) analog-to-digital converters, so they offer the same nominal resolution and conversion architecture, though their channel counts and package options differ.
How do the input channel counts compare?
The ADS8344NB provides 8 input channels, while the ADS8341EB/2K5G4 provides 4 input channels. Designs requiring more single-ended or multiplexed inputs should account for this difference when selecting between the two parts.
What supply voltage do these converters require?
Both the ADS8344NB and ADS8341EB/2K5G4 operate from a single 2.7 V to 5 V analog supply, with a separate digital supply pin for interfacing. Designers should confirm the exact supply and reference conditions against the respective manufacturer datasheets for the target design.
What serial interface do these ADCs use?
Both devices use a serial SPI-compatible interface for communication with a host controller. The interface supports connection to microcontrollers and DSPs, and the reduced pin count of the ADS8341EB/2K5G4 reflects its lower channel count.
Why is the ADS8341EB/2K5G4 supplied in tape-and-reel form?
The "2K5G4" suffix indicates tape-and-reel packaging in a 16-pin SSOP, which is intended for high-volume automated pick-and-place assembly. The ADS8344NB in PDIP is typically supplied in tube form for through-hole or socketed applications.
Can the ADS8341EB/2K5G4 replace the ADS8344NB in an existing design?
Not directly. Because the two parts differ in package type, pin count, and channel count, a replacement requires a PCB redesign and validation of the reduced input channel count against the application requirements. Both should be evaluated against the manufacturer datasheets before substitution.