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 is a functionally compatible replacement candidate for the ADS8344E, sharing the same 16-bit SAR architecture, 4-channel single-ended/2-channel differential input multiplexer, SPI-compatible serial interface, and 20-pin SSOP package. The EB suffix denotes a tighter grade specification, so the two part numbers are interchangeable in most designs, with the ADS8344EB offering improved guaranteed performance over the standard ADS8344E. Designers should confirm that the tighter grade limits align with their system requirements before substituting.
Resolution and Architecture
High match
Input Channel Configuration
High match
Package and Pinout
High match
Grade and Accuracy Specifications
Validation required
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 | ADS8344EB | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both parts provide the same 16-bit resolution, so measurement precision is equivalent. |
| Number of Input Channels | 8 single-ended / 4 differential | 8 single-ended / 4 differential | Identical channel count and configuration allow the same sensor/multiplexing architecture. |
| Sampling Rate | 100 kSPS | 100 kSPS | Same maximum throughput means timing and signal bandwidth requirements are unchanged. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical supply range supports the same power rail design and level compatibility. |
| Interface | SPI-compatible serial | SPI-compatible serial | Same serial interface allows drop-in replacement without firmware or bus changes. |
| Reference Input | External | External | Both require an external reference, so the reference circuit can remain identical. |
| Package | 20-pin SSOP | 20-pin SSOP | Same package and pinout enable direct board-level substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature range ensures the same environmental qualification applies. |
| Power Consumption | ~0.8 mW at 100 kSPS (5 V) | ~0.8 mW at 100 kSPS (5 V) | Equivalent power draw keeps thermal and battery-life budgets unchanged. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344EB | ADS8344E |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS8344 | - |
| Number of Bits | 16 | 16 |
| Sampling Rate (Per Second) | 100k | - |
| Number of Inputs | 4, 8 | 4, 8 |
| 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 |
| Mounting Type | Surface Mount | - |
| Packaging | Bulk, Tube | - |
| Sampling Rate(Per Second) | - | 100k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What is the difference between the ADS8344E and the ADS8344EB?
Both are 16-bit, 4-channel, serial-output successive-approximation ADCs from Texas Instruments in a 20-pin SSOP (DB) package. The ADS8344E is specified over the −40°C to +85°C industrial temperature range, while the ADS8344EB is specified over the −40°C to +125°C extended temperature range. The "B" suffix denotes the extended-temperature grade; functional operation and pinout are otherwise the same.
Are the ADS8344E and ADS8344EB pin-compatible and package-compatible?
Yes. Both devices are offered in the same 20-pin SSOP (DB) package with identical pin functions, so they share the same PCB land pattern and can occupy the same footprint. The difference is the temperature grade, not the package or pinout.
Can the ADS8344EB be used as a drop-in replacement for the ADS8344E?
In most designs the ADS8344EB can replace the ADS8344E because the pinout, package, resolution, channel count, and serial interface are the same. The replacement should be validated against the target design's thermal and electrical requirements, since the EB grade is rated for a wider ambient temperature range (−40°C to +125°C) than the E grade (−40°C to +85°C).
What are the key shared specifications of the ADS8344E and ADS8344EB?
Both are 16-bit successive-approximation ADCs with 4 single-ended or 2 differential input channels, a serial (SPI-compatible) interface, and operation from a single +2.7 V to +5 V supply. They are supplied in a 20-pin SSOP package and are specified for 16-bit no-missing-code performance.
Which temperature range applies to each grade?
The ADS8344E is specified for the industrial temperature range of −40°C to +85°C. The ADS8344EB is specified for the extended temperature range of −40°C to +125°C. Designs operating near or above +85°C ambient should use the EB grade.
Do the ADS8344E and ADS8344EB differ in resolution, channel count, or interface?
No. Both are 16-bit ADCs with 4 single-ended / 2 differential input channels and the same serial interface. The grade suffix (E vs. EB) reflects the temperature specification, not the converter resolution, channel configuration, or digital interface.
Which grade should be selected for an application with ambient temperatures above +85°C?
The ADS8344EB should be selected, because its specified operating temperature range extends to +125°C, whereas the ADS8344E is only specified to +85°C. Using the E grade above its rated ambient temperature is outside its specified operating conditions.