Part A
ADS8344NB
德州儀器
- Lifecycle
- Active
- Stock
- 5654 件
- Package
- SSOP-20
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS8343EBG4 is a viable functional replacement candidate for the ADS8344NB, sharing the same 16-bit SAR architecture, 4-channel single-ended/2-channel differential input multiplexer, and 100 kSPS throughput in a comparable SSOP-20 footprint. Designers must validate the single +2.7 V to +5 V supply configuration and the corresponding digital interface logic thresholds before committing to production, since the ADS8344NB supports a split analog/digital supply arrangement.
Resolution and Architecture
High match
Input Channel Configuration
High match
Supply Voltage Configuration
Validation required
Package and Pin Footprint
High match
Parts at a glance
Part B
ADS8343EBG4
德州儀器
- Lifecycle
- Active
- Stock
- 4868 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 | ADS8344NB | 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 ADS8344 offers twice the input capacity of the ADS8343. |
| Sampling Rate | 100 kSPS | 100 kSPS | Throughput is the same, so timing-critical designs can substitute without changing acquisition budgets. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical supply range allows drop-in use across 3 V and 5 V systems. |
| Interface | SPI-compatible serial | SPI-compatible serial | Same serial interface means firmware and bus wiring remain compatible between the two parts. |
| Package | 20-pin SSOP (DBQ) | 16-pin SSOP (DBQ) | Different pin counts and footprints mean the PCB layout must change; they are not footprint-compatible. |
| Input Type | Single-ended or differential | Single-ended or differential | Both support pseudo-differential and single-ended configurations, preserving signal conditioning flexibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range supports use in identical environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344NB | 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 ADS8344NB and ADS8343EBG4?
The ADS8344NB is a 16-bit, 8-channel successive-approximation ADC in a 20-pin PDIP package, while the ADS8343EBG4 is a 16-bit, 4-channel ADC in a 16-pin SSOP package. The ADS8344NB provides twice the input channel count, whereas the ADS8343EBG4 offers a smaller footprint. Both are pin-compatible within their respective families but differ in channel count and package.
Do the ADS8344NB and ADS8343EBG4 have the same resolution and sampling rate?
Yes. Both devices are 16-bit successive-approximation ADCs with a maximum sampling rate of 100 kSPS, as specified in the Texas Instruments datasheets for the ADS8344 and ADS8343 families.
Can the ADS8343EBG4 be used as a drop-in replacement for the ADS8344NB?
No. The ADS8344NB is a 20-pin PDIP device with 8 input channels, while the ADS8343EBG4 is a 16-pin SSOP device with 4 input channels. The package, pin count, and channel count differ, so a direct drop-in replacement is not possible without PCB redesign and validation against the target design requirements.
What are the input channel configurations of the ADS8344NB and ADS8343EBG4?
The ADS8344NB provides 8 single-ended inputs or 4 differential input pairs. The ADS8343EBG4 provides 4 single-ended inputs or 2 differential input pairs. Both support software-selectable single-ended or differential operation via the serial interface.
Do both devices support the same serial interface?
Yes. Both the ADS8344NB and ADS8343EBG4 use a SPI-compatible serial interface for configuration and data readout, allowing direct connection to most microcontrollers and DSPs. The interface supports daisy-chaining and is compatible with standard SPI modes.
What are the supply voltage and reference requirements for these ADCs?
Both the ADS8344NB and ADS8343EBG4 operate from a single 2.7 V to 5.25 V analog supply and a separate 2.7 V to 5.25 V digital supply. Each requires an external voltage reference, with the reference input range specified in the respective datasheets. The reference voltage sets the full-scale input range.
Which package options are available for the ADS8344NB and ADS8343EBG4?
The ADS8344NB is supplied in a 20-pin PDIP package. The ADS8343EBG4 is supplied in a 16-pin SSOP package (the "EBG4" suffix denotes the SSOP package and green/RoHS-compliant construction). Package selection should be based on board space and assembly requirements.
Are the ADS8344NB and ADS8343EBG4 suitable for the same applications?
Both are suited for industrial measurement, data acquisition, and portable instrumentation requiring 16-bit resolution at up to 100 kSPS. The ADS8344NB is preferable when more input channels are needed, while the ADS8343EBG4 is preferable when board space is constrained and 4 channels are sufficient.