Part A
ADS8344E
德州儀器
- Lifecycle
- Active
- Stock
- 2647 件
- Package
- SSOP-20
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS8343EB/2K5G4 is a viable functional replacement candidate for the ADS8344E, sharing the same 16-bit SAR architecture, 4-channel differential input multiplexer, and 200 kSPS throughput in a pin-compatible SSOP-20 package. Designers should validate the single-supply 2.7 V to 5.25 V operating range and the corresponding reference and interface timing against the target application before final qualification.
Resolution and Architecture
High match
Input Channel Configuration
High match
Package and Pinout
High match
Supply Voltage Range
Validation required
Parts at a glance
Part B
ADS8343EB/2K5G4
德州儀器
- Lifecycle
- Active
- Stock
- 9386 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 | ADS8344E | ADS8343EB/2K5G4 | 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 | 8 single-ended / 4 differential | 4 single-ended / 2 differential | Channel count determines how many signals can be multiplexed into one ADC; the ADS8344E supports twice as many inputs. |
| Sampling Rate | 100 kSPS | 100 kSPS | Throughput is identical, so timing and bandwidth requirements are met by either device. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Both operate over the same wide supply range, allowing direct substitution in 3 V and 5 V systems. |
| Interface Type | SPI-compatible serial (SPI/QSPI/Microwire) | SPI-compatible serial (SPI/QSPI/Microwire) | Identical serial interface simplifies firmware and hardware reuse when swapping parts. |
| Package / Pin Count | 20-pin SSOP (DBQ) | 16-pin SSOP (DBQ) | Different pin counts and footprints mean the PCB layout must change; they are not drop-in replacements. |
| Input Configuration | Pseudo-differential, 8-channel multiplexer | Pseudo-differential, 4-channel multiplexer | The multiplexer size affects system channel count and the ability to monitor multiple sensors with one converter. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both are rated for industrial temperature ranges, so environmental compatibility is equivalent. |
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 | ADS8344E | ADS8343EB/2K5G4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| 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 ADS8344E and ADS8343EB/2K5G4?
The ADS8344E is a 16-bit, 8-channel successive-approximation ADC in a 20-pin SSOP package, while the ADS8343EB/2K5G4 is a 16-bit, 4-channel SAR ADC in a 16-pin SSOP package supplied in tape-and-reel form (2K5 indicates 2500-unit reel). The ADS8344E provides twice the input channel count, whereas the ADS8343EB/2K5G4 offers a smaller pin count and reel packaging suited to automated assembly.
Do the ADS8344E and ADS8343EB/2K5G4 have the same resolution and sample rate?
Both devices are 16-bit successive-approximation ADCs. The ADS8344E is specified at 100 kSPS, and the ADS8343EB/2K5G4 is also specified at 100 kSPS, so resolution and throughput are equivalent between the two parts.
Are the ADS8344E and ADS8343EB/2K5G4 pin-compatible?
No. The ADS8344E uses a 20-pin SSOP package with 8 analog input channels, while the ADS8343EB/2K5G4 uses a 16-pin SSOP package with 4 analog input channels. The differing pin counts and channel configurations mean the PCB land patterns and pin functions are not interchangeable.
What analog input configuration does each device support?
The ADS8344E provides 8 single-ended inputs or 4 differential input pairs, selectable via its input multiplexer. The ADS8343EB/2K5G4 provides 4 single-ended inputs or 2 differential input pairs. Designs requiring more channels should use the ADS8344E.
What supply voltage and reference requirements apply to these ADCs?
Both the ADS8344E and ADS8343EB/2K5G4 operate from a single +2.7 V to +5 V analog supply and support an external reference voltage that sets the full-scale input range. The reference input should be driven from a low-noise source for full 16-bit performance.
What serial interface do the ADS8344E and ADS8343EB/2K5G4 use?
Both devices use an SPI-compatible serial interface for communication with a host controller. The interface supports daisy-chaining and is suitable for isolated or multi-device bus configurations.
What does the 2K5G4 suffix indicate on the ADS8343EB/2K5G4?
The 2K5G4 suffix denotes tape-and-reel packaging with 2500 units per reel, with the G4 indicating lead-free (RoHS-compliant) construction. The ADS8344E is typically supplied in tube or tray packaging; reel availability should be confirmed against the specific orderable part number.
Can the ADS8343EB/2K5G4 replace the ADS8344E in an existing design?
Not directly. The ADS8343EB/2K5G4 has 4 analog channels versus 8 on the ADS8344E and uses a different 16-pin package versus the 20-pin package of the ADS8344E. A replacement requires PCB redesign, reduced channel count, and revalidation of the analog front end against the manufacturer datasheets.