Part A
ADS8344EB
Texas Instruments
- Lifecycle
- Active
- Stock
- 6770 PCS
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8344EB and ADS8343EBG4 are both 16-bit successive-approximation ADCs from the same family and share an identical TSSOP-20 footprint, making them strong functional replacement candidates. However, they differ in channel configuration and supply voltage range, so the replacement is viable only after confirming the system's input multiplexing requirements and power rail compatibility.
Resolution
High match
Channel Configuration
Validation required
Supply Voltage Range
Validation required
Package Type
High match
Parts at a glance
Part B
ADS8343EBG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4868 PCS
- Package
- SSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (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 | ADS8344EB | 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 into one ADC; the ADS8344 offers twice the input capacity of the ADS8343. |
| Sampling Rate | 100 kSPS | 100 kSPS | Throughput is the same, so timing and bandwidth requirements are unaffected by the substitution. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical supply range means the same power rail can be reused without redesign. |
| Interface Type | SPI-compatible serial (QSPI/Microwire) | SPI-compatible serial (QSPI/Microwire) | Same serial interface allows drop-in firmware compatibility with the host microcontroller. |
| 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 Type | Single-ended or differential (software selectable) | Single-ended or differential (software selectable) | Both support flexible input configurations, 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. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344EB | ADS8343EBG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | - | 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 |
| 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 |
| Base Product Number | ADS8344 | - |
| Sampling Rate (Per Second) | 100k | - |
| Number of A / D Converters | 1 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Bulk, Tube | - |
Frequently asked questions
What are the key differences between the ADS8344EB and ADS8343EBG4?
The ADS8344EB is a 16-bit, 4-channel serial ADC in a 20-pin SSOP package, while the ADS8343EBG4 is a 16-bit, 4-channel serial ADC in a 16-pin SSOP package. The ADS8344EB provides a 4-wire SPI/QSPI/Microwire interface with a separate serial clock and data line, whereas the ADS8343EBG4 uses a 3-wire interface. Both operate from a 2.7V to 5.25V supply and offer similar sampling rates, but the ADS8344EB includes a shutdown mode and internal reference options that differ from the ADS8343EBG4 configuration.
Are the ADS8344EB and ADS8343EBG4 pin-compatible?
No. The ADS8344EB is housed in a 20-pin SSOP package, while the ADS8343EBG4 is in a 16-pin SSOP package. The pin counts and pin functions differ, so they are not drop-in replacements and require different PCB layouts.
What is the resolution and sampling rate of these ADCs?
Both the ADS8344EB and ADS8343EBG4 are 16-bit successive-approximation ADCs. The ADS8344EB offers a sampling rate of up to 100 kSPS, and the ADS8343EBG4 provides a sampling rate of up to 100 kSPS as well, according to the respective Texas Instruments datasheets.
What input channels and configurations do these devices support?
Both devices provide 4 single-ended or 2 differential input channels. The ADS8344EB and ADS8343EBG4 each feature a 4-channel input multiplexer that can be configured for single-ended or differential operation, selectable via the serial interface command set.
What supply voltage range do the ADS8344EB and ADS8343EBG4 require?
Both devices operate from a single supply voltage ranging from 2.7V to 5.25V, as specified in the Texas Instruments datasheets. This allows operation from 3V or 5V systems.
What serial interface do these ADCs use?
The ADS8344EB uses a 4-wire SPI-compatible serial interface with separate CS, DIN, DOUT, and DCLK lines. The ADS8343EBG4 uses a 3-wire SPI-compatible interface with CS, DCLK, and a bidirectional DIO line. Both interfaces are compatible with SPI, QSPI, and Microwire protocols.
Do these devices include an internal reference?
No. Both the ADS8344EB and ADS8343EBG4 require an external reference voltage applied to the VREF pin. Neither device integrates an internal voltage reference, per the Texas Instruments datasheets.
What are the operating temperature ranges for these components?
Both the ADS8344EB and ADS8343EBG4 are specified for operation over the industrial temperature range of -40°C to +85°C, as stated in their respective Texas Instruments datasheets.