Part A
ADS8344E
Texas Instruments
- Lifecycle
- Active
- Stock
- 2647 PCS
- Package
- SSOP-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8344E and ADS8343EBG4 are both 16-bit successive-approximation ADCs offering closely aligned resolution, sampling architecture, and serial interface characteristics, making them a viable functional replacement pairing. However, the ADS8343EBG4 provides a single-ended input configuration versus the differential-capable inputs of the ADS8344E, and the supply voltage and package options differ, so the replacement should be validated against the target application's input topology, power rail, and board layout before adoption.
Resolution
High match
Input Configuration
Validation required
Supply Voltage
Validation required
Package Type
Validation required
Parts at a glance
Part B
ADS8343EBG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4868 PCS
- Package
- SSOP-16
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS8343EBG4 | 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; the ADS8344E supports twice as many inputs, which affects system architecture. |
| Sampling Rate | 100 kSPS | 100 kSPS | Throughput is identical, so timing and bandwidth requirements are unaffected by the choice. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical supply range means both can operate from the same rails, simplifying power design. |
| Interface Type | SPI-compatible serial (SPI/QSPI/Microwire) | SPI-compatible serial (SPI/QSPI/Microwire) | Same serial interface allows drop-in compatibility with the host microcontroller or DSP. |
| Package / Pin Count | 20-pin SSOP (DBQ) | 16-pin SSOP (DBQ) | Different package and pin count means the PCB footprint and pinout are not interchangeable, requiring layout changes. |
| Input Configuration | Single-ended or differential (software selectable) | Single-ended or differential (software selectable) | Both support flexible input modes, so signal conditioning requirements are similar. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both 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 | ADS8344E | ADS8343EBG4 |
|---|---|---|
| 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 ADS8344E and ADS8343EBG4?
The ADS8344E is a 16-bit, 8-channel successive-approximation ADC in a 20-pin SSOP package, while the ADS8343EBG4 is a 16-bit, 4-channel ADC in a 16-pin SSOP package. The ADS8344E provides twice the input channel count, whereas the ADS8343EBG4 offers a smaller package footprint for space-constrained designs.
Do the ADS8344E and ADS8343EBG4 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 maximum sampling rate are equivalent between the two parts.
Are the ADS8344E and ADS8343EBG4 pin-compatible?
No. The ADS8344E uses a 20-pin SSOP package with 8 analog input channels, while the ADS8343EBG4 uses a 16-pin SSOP package with 4 analog input channels. The differing pin counts and pin functions prevent direct pin-for-pin substitution.
What analog input configuration do these ADCs support?
Both devices provide a 4-wire, SPI-compatible serial interface and support single-ended or differential analog input configurations, with the channel count differing as noted (8 channels for the ADS8344E, 4 channels for the ADS8343EBG4).
What supply voltage range do the ADS8344E and ADS8343EBG4 require?
Both devices operate from a single 2.7 V to 5.25 V analog supply, with a separate digital supply pin (VIO) that allows the serial interface to be referenced to a lower logic voltage.
Can the ADS8343EBG4 replace the ADS8344E in an existing design?
Not directly. Although both are 16-bit, 100 kSPS ADCs with SPI interfaces, the ADS8343EBG4 has only 4 analog input channels versus 8 on the ADS8344E and uses a different 16-pin package. A replacement requires verifying channel count requirements, revising the PCB land pattern, and revalidating the design against the manufacturer datasheet.
What serial interface do the ADS8344E and ADS8343EBG4 use?
Both devices use an SPI-compatible, 4-wire serial interface (CS, DIN, DOUT, and DCLK) that connects directly to most microcontrollers and DSPs, supporting daisy-chain and multi-device configurations.