Part A
ADS8344EB
德州儀器
- Lifecycle
- Active
- Stock
- 6770 件
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS8344EB and ADS8343EB/2K5G4 are both 16-bit SAR ADCs from the same family and share a compatible serial interface and supply architecture, making the ADS8343EB/2K5G4 a viable functional replacement candidate for the ADS8344EB in many designs. However, the two devices differ in channel count and package footprint, so the replacement is not a true drop-in and requires validation of the analog input configuration and board layout before adoption.
Channel Count
Validation required
Resolution
High match
Interface Type
High match
Package Type
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 | ADS8344EB | ADS8343EB/2K5G4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | 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 ADS8344EB supports twice as many inputs, which affects system architecture. |
| Sampling Rate (max) | 100 kSPS | 100 kSPS | Identical maximum throughput means both can handle the same signal bandwidth requirements. |
| Supply Voltage (analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Matching supply ranges allow either part to operate from the same rails, simplifying power design. |
| Interface Type | SPI / QSPI / Microwire (serial) | SPI / QSPI / Microwire (serial) | Same serial interface means firmware and host connections are compatible between the two parts. |
| Input Type | Single-ended or differential | Single-ended or differential | Both support pseudo-differential and single-ended configurations, preserving signal conditioning flexibility. |
| Package / Pin Count | 20-pin SSOP | 16-pin SSOP | Different package and pin count means the PCB footprint and pinout are not drop-in compatible, requiring layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure both parts suit the same industrial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344EB | ADS8343EB/2K5G4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| 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 ADS8343EB/2K5G4?
The ADS8344EB is a 16-bit, 4-channel serial ADC, while the ADS8343EB/2K5G4 is a 16-bit, 4-channel serial ADC with a different input configuration and packaging option. The ADS8344EB offers a single-ended or differential input multiplexer with a 4-channel configuration, whereas the ADS8343EB/2K5G4 provides a 2-channel differential or 4-channel single-ended input multiplexer. The "2K5G4" suffix indicates tape-and-reel packaging in a specific quantity, while the ADS8344EB is typically supplied in a tube or tray. Both share the same 16-bit SAR architecture and serial interface but differ in channel configuration and packaging.
Are the ADS8344EB and ADS8343EB/2K5G4 pin-compatible?
No, they are not pin-compatible. The ADS8344EB and ADS8343EB/2K5G4 have different pin assignments due to their differing input multiplexer configurations. The ADS8344EB uses a 4-channel single-ended or 2-channel differential input arrangement, while the ADS8343EB/2K5G4 uses a 2-channel differential or 4-channel single-ended arrangement. Designers must verify the pinout in the respective datasheets before considering any substitution.
Do both devices support the same serial interface and supply voltage?
Yes, both the ADS8344EB and ADS8343EB/2K5G4 feature a serial SPI-compatible interface and operate from a single +2.7V to +5V supply. Both are 16-bit successive-approximation register (SAR) ADCs with similar sampling rates (up to 100kSPS) and reference voltage requirements. However, always confirm the exact timing and interface specifications in the respective manufacturer datasheets before design integration.
What does the "2K5G4" suffix on the ADS8343EB/2K5G4 indicate?
The "2K5G4" suffix indicates the packaging and quantity: 2,500 units supplied on tape-and-reel in a G4 (green/RoHS-compliant) package. This is a production packaging option, whereas the ADS8344EB is typically supplied in tube or tray packaging. The suffix does not change the electrical specifications of the device.
Can the ADS8344EB be used as a drop-in replacement for the ADS8343EB/2K5G4?
No, the ADS8344EB cannot be used as a drop-in replacement for the ADS8343EB/2K5G4. Although both are 16-bit SAR ADCs with serial interfaces, they differ in input multiplexer configuration and pin assignments. A direct substitution would require PCB redesign and firmware adjustment. Always validate any replacement against the manufacturer's datasheet and the target design requirements.
What are the input channel configurations of each device?
The ADS8344EB provides a 4-channel single-ended or 2-channel differential input multiplexer. The ADS8343EB/2K5G4 provides a 2-channel differential or 4-channel single-ended input multiplexer. These configurations affect how many signals can be measured and whether differential or single-ended measurements are supported, so the choice depends on the application's signal acquisition requirements.
Are both devices RoHS-compliant?
The ADS8343EB/2K5G4 carries the "G4" suffix, which indicates RoHS-compliant and green packaging. The ADS8344EB is also available in RoHS-compliant packaging, but the exact compliance status depends on the specific orderable part number. Designers should verify the RoHS status on the manufacturer's datasheet or distributor listing for the exact part number being used.