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 ADS8341EB/2K5G4 is a viable functional replacement candidate for the ADS8344EB, sharing the same 16-bit SAR architecture, 4-channel differential input configuration, and 2.7 V to 5.25 V supply range. Designers should validate the reduced 100 kSPS throughput and the absence of an internal reference buffer against application requirements before committing to the substitution.
Sampling Rate
Validation required
Resolution and Architecture
High match
Input Channel Configuration
High match
Reference and Supply Requirements
Validation required
Parts at a glance
Part B
ADS8341EB/2K5G4
Texas Instruments
- Lifecycle
- Active
- Stock
- 7122 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 | ADS8341EB/2K5G4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Bit depth determines the smallest measurable signal step; both are 16-bit so quantization resolution is equivalent. |
| Number of input channels | 8 (single-ended) / 4 (differential) | 4 (single-ended) / 2 (differential) | Channel count defines how many analog signals can be multiplexed into one ADC; the ADS8344EB supports twice as many inputs. |
| Sampling rate (max) | 100 kSPS | 100 kSPS | Maximum throughput limits the highest signal frequency that can be digitized; both devices share the same 100 kSPS ceiling. |
| Interface type | SPI-compatible serial (QSPI, Microwire) | SPI-compatible serial (QSPI, Microwire) | Serial interface compatibility determines whether the part can drop into an existing microcontroller bus without glue logic. |
| Supply voltage (analog & digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Supply range governs compatibility with 3.3 V and 5 V systems; identical ranges allow the same power rail design. |
| Input type | Single-ended and pseudo-differential | Single-ended and pseudo-differential | Input configuration affects how sensor signals are wired and whether common-mode rejection is available. |
| Package | SSOP-20 (DBQ) | SSOP-16 (DBQ) | Package footprint and pin count must match the PCB layout; the 20-pin vs 16-pin difference prevents direct drop-in replacement. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms suitability for industrial environments; both cover the standard industrial band. |
| Reference input | External reference | External reference | External reference support allows the full-scale range to be tailored to the sensor, affecting absolute accuracy and noise performance. |
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 | ADS8344EB | ADS8341EB/2K5G4 |
|---|---|---|
| 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 ADS8341EB/2K5G4?
The ADS8344EB is a 16-bit, 8-channel successive-approximation ADC, while the ADS8341EB/2K5G4 is a 16-bit, 4-channel SAR ADC. Both are pin-compatible in the same SSOP-20 package and share a similar serial interface, but the ADS8344EB provides twice the input channel count. The ADS8341EB/2K5G4 is supplied in a 2,500-unit tape-and-reel (2K5G4 suffix), whereas the ADS8344EB is typically ordered in tube or tray quantities.
Are the ADS8344EB and ADS8341EB/2K5G4 pin-compatible?
Yes. Both devices are offered in the same 20-lead SSOP (DB) package with an identical pinout, which allows a common PCB footprint. However, pin-compatibility does not guarantee functional equivalence; the channel count and multiplexer configuration differ, so firmware and input routing must be validated before substitution.
What is the resolution and sampling rate of these ADCs?
Both the ADS8344EB and ADS8341EB/2K5G4 are 16-bit successive-approximation ADCs with a maximum sampling rate of 100 kSPS. The ADS8344EB supports 8 single-ended or 4 differential inputs, while the ADS8341EB/2K5G4 supports 4 single-ended or 2 differential inputs.
What is the difference in input channel configuration between the two parts?
The ADS8344EB features an 8-channel input multiplexer configurable as 8 single-ended or 4 pseudo-differential inputs. The ADS8341EB/2K5G4 features a 4-channel multiplexer configurable as 4 single-ended or 2 pseudo-differential inputs. Designs requiring more than four single-ended channels must use the ADS8344EB.
Do both devices use the same serial interface?
Yes. Both the ADS8344EB and ADS8341EB/2K5G4 use a SPI-compatible serial interface with CS, DIN, DOUT, DCLK, and BUSY signals. The command byte structure is similar, but the channel-selection bits differ because of the different multiplexer sizes, so software must be adjusted accordingly.
What are the supply voltage and reference requirements for these ADCs?
Both devices operate from a single 2.7 V to 5.25 V analog supply (VDD) and a separate 2.7 V to 5.25 V digital supply (VCC). They require an external reference voltage applied to the VREF pin; the reference input range is 0.5 V to VDD. Neither device includes an internal reference.
What is the difference between the EB grade and other grades of these ADCs?
The EB suffix denotes the industrial temperature grade (−40 °C to +85 °C) in the SSOP-20 package. Both the ADS8344EB and ADS8341EB/2K5G4 are specified over this industrial temperature range. The 2K5G4 suffix on the ADS8341EB indicates tape-and-reel packaging in 2,500-unit reels with Pb-free (RoHS-compliant) construction.
Can the ADS8341EB/2K5G4 be used as a drop-in replacement for the ADS8344EB?
Not as a direct drop-in replacement. Although the package and pinout are identical, the ADS8341EB/2K5G4 has only 4 input channels versus 8 on the ADS8344EB. Any design using more than four single-ended or two differential inputs cannot use the ADS8341EB/2K5G4 without hardware and firmware changes. For designs using four or fewer channels, substitution is possible after verifying the command byte and channel-selection logic.
What are the typical applications for each device?
The ADS8344EB is suited to multi-channel data acquisition systems, industrial process control, and battery-powered instrumentation requiring up to 8 single-ended inputs. The ADS8341EB/2K5G4 is suited to space-constrained or cost-sensitive designs needing up to 4 single-ended inputs, such as portable medical devices, handheld meters, and compact sensor interfaces.