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/2K5G4 can serve as a functional replacement candidate for the ADS8344NB in many designs, since both are 16-bit successive-approximation ADCs with a similar serial interface and comparable resolution. However, the ADS8344NB provides four input channels versus two on the ADS8341E/2K5G4, and the two devices differ in package and reference architecture, so the replacement is not a drop-in equivalent and requires validation against the specific application requirements.
Resolution
Validation required
Input Channel Count
Not compatible
Package Type
Validation required
Reference Architecture
Validation required
Parts at a glance
Part B
ADS8341E/2K5G4
德州儀器
- Lifecycle
- Active
- Stock
- 9351 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 | ADS8341E/2K5G4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | 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, which affects system architecture. |
| Sampling rate (max) | 100 kSPS | 100 kSPS | Throughput is identical, so timing and bandwidth requirements are met by either part. |
| Supply voltage (analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Both support the same wide analog supply range, allowing operation from 3 V or 5 V systems interchangeably. |
| Interface | SPI / QSPI / Microwire compatible serial | SPI / QSPI / Microwire compatible serial | Identical serial interface means the same microcontroller pins and firmware protocol can be reused. |
| Package | 20-pin SSOP (DBQ) | 16-pin SSOP (DBQ) | Different pin counts and footprints mean the PCB layout must change; the parts are not drop-in replacements. |
| Input type | Single-ended or differential (software selectable) | Single-ended or differential (software selectable) | Both offer flexible input configuration, so signal conditioning requirements are similar. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range means both suit the same 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 | ADS8341E/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 ADS8341E/2K5G4?
The ADS8344NB is a 16-bit, 8-channel successive-approximation ADC in a 20-pin PDIP package, while the ADS8341E/2K5G4 is a 16-bit, 4-channel ADC in a 16-pin SSOP package supplied in tape-and-reel form. The ADS8344NB provides twice the input channel count, whereas the ADS8341E/2K5G4 offers a smaller footprint and reel packaging suited to automated assembly.
Do the ADS8344NB and ADS8341E/2K5G4 have the same resolution and sampling rate?
Yes. Both devices are 16-bit successive-approximation ADCs specified for a 100 kSPS throughput rate, so resolution and conversion speed are equivalent between the two parts.
Are the ADS8344NB and ADS8341E/2K5G4 pin-compatible?
No. The ADS8344NB uses a 20-pin PDIP package, and the ADS8341E/2K5G4 uses a 16-pin SSOP package. The differing pin counts and package outlines mean they are not drop-in replacements and require different PCB land patterns.
What input channel configuration does each device support?
The ADS8344NB provides 8 single-ended inputs or 4 differential input pairs. The ADS8341E/2K5G4 provides 4 single-ended inputs or 2 differential input pairs. Channel count is the primary functional difference between the two parts.
Do both parts support the same serial interface?
Yes. Both the ADS8344NB and ADS8341E/2K5G4 use an SPI-compatible serial interface for communication with a host controller, allowing them to share a common firmware interface approach despite their different channel counts.
What supply voltage range do the ADS8344NB and ADS8341E/2K5G4 require?
Both devices operate from a single 2.7 V to 5.25 V analog supply, with a separate digital supply pin for interfacing to lower-voltage logic. Designs should confirm the exact supply and reference conditions against the respective manufacturer datasheets.
Why is the ADS8341E/2K5G4 supplied in tape-and-reel while the ADS8344NB is not?
The "2K5G4" suffix on the ADS8341E/2K5G4 denotes tape-and-reel packaging in quantities of 2,500 units, which is intended for high-volume automated pick-and-place assembly. The ADS8344NB is a through-hole PDIP device typically supplied in tube or tray form for prototyping or socketed applications.
Can the ADS8341E/2K5G4 replace the ADS8344NB in an existing design?
Not directly. Although both are 16-bit, 100 kSPS SPI ADCs, the ADS8341E/2K5G4 has half the input channels and a different package and pinout. A replacement requires PCB redesign, firmware adjustment for the reduced channel count, and validation against the target system requirements.