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 ADS8344NB and ADS8344E/2K5G4 share the same core 16-bit SAR ADC architecture, channel configuration, and serial interface, making them functionally interchangeable in most designs. The primary distinction is package and ordering format, so verification of the assembly footprint and reel configuration is recommended before substitution.
Resolution and Architecture
High match
Channel Count and Input Type
High match
Package Type
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
ADS8344E/2K5G4
德州儀器
- Lifecycle
- Active
- Stock
- 8594 件
- Package
- SSOP-20
- 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 | ADS8344E/2K5G4 | Why it matters |
|---|---|---|---|
| Package / Mounting | 20-pin PDIP (through-hole) | 20-pin SSOP (surface-mount) | Footprint and assembly method differ, so the parts are not drop-in board replacements for one another. |
| Packaging / Ordering Quantity | Tube (bulk) | Tape & reel, 2500 units | Affects handling and production line compatibility; reel packaging suits automated SMT assembly. |
| Resolution | 16 bit | 16 bit | Identical conversion resolution preserves measurement precision when substituting. |
| Number of Input Channels | 4 single-ended / 2 differential | 4 single-ended / 2 differential | Same channel count and configuration options allow equivalent signal routing. |
| Sampling Rate | 100 kSPS | 100 kSPS | Identical throughput ensures the same timing budget for the host system. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Same supply range means the same power rail can be reused without redesign. |
| Interface | SPI-compatible serial | SPI-compatible serial | Identical digital interface allows the same firmware and host connections. |
| Reference Input | External | External | Both require an external reference, so the same reference circuit can be retained. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same temperature rating supports use in the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344NB | ADS8344E/2K5G4 |
|---|---|---|
| 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 | 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 | 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 the ADS8344E/2K5G4?
Both devices are 16-bit, 4-channel, serial-output successive-approximation ADCs from Texas Instruments with the same core electrical specifications (e.g., 100 kSPS throughput, SPI/QSPI/Microwire-compatible interface, 2.7 V to 5 V supply). The primary differences are package and ordering format: the ADS8344NB is supplied in a 20-pin PDIP (N package), while the ADS8344E/2K5G4 is supplied in a 20-pin SSOP (DBQ package) and is provided as a tape-and-reel (2K5) orderable with a G4 lead-finish/qualification suffix.
Are the ADS8344NB and ADS8344E/2K5G4 electrically interchangeable?
Yes, from a functional standpoint both are the same ADS8344 converter with identical resolution, channel count, interface, and supply requirements. However, they are not drop-in replacements for each other on a PCB because the PDIP (N) and SSOP (DBQ) packages have different footprints, pin pitches, and land patterns. Electrical interchangeability must be confirmed against the datasheet for the specific package variant.
What is the resolution and sampling rate of these ADCs?
Both the ADS8344NB and ADS8344E/2K5G4 are 16-bit successive-approximation analog-to-digital converters with a maximum throughput of 100 kSPS, as specified in the Texas Instruments ADS8344 datasheet.
How many input channels do these devices provide?
Both variants provide 4 single-ended input channels or 2 differential input channels, configurable through the serial interface control word, per the ADS8344 datasheet.
What supply voltage and reference requirements apply to both parts?
Both devices operate from a single 2.7 V to 5 V analog supply (VCC) and a separate 2.7 V to 5 V digital supply (VDD), and require an external reference voltage applied to the VREF pin. These parameters are common to both the N and DBQ package variants per the ADS8344 datasheet.
What serial interface do these ADCs use?
Both the ADS8344NB and ADS8344E/2K5G4 use a serial interface compatible with SPI, QSPI, and Microwire, allowing direct connection to most microcontrollers and DSPs, as documented in the ADS8344 datasheet.
Why would a designer choose the ADS8344NB over the ADS8344E/2K5G4?
The ADS8344NB in the 20-pin PDIP package is typically selected for through-hole prototyping, socketed designs, or legacy boards that already use the N footprint. The ADS8344E/2K5G4 in the 20-pin SSOP is typically selected for space-constrained surface-mount production and automated tape-and-reel assembly. Package and assembly requirements, not converter performance, drive the choice.
Does the G4 suffix on the ADS8344E/2K5G4 indicate a different silicon or performance grade?
The G4 suffix is an orderable lead-finish/qualification identifier used by Texas Instruments for the same ADS8344 die in the DBQ package; it does not denote a different resolution, speed, or accuracy grade. Designers should confirm the exact orderable specification in the current TI datasheet or product page before qualification.