Part A
ADS8344E
德州儀器
- Lifecycle
- Active
- Stock
- 2647 件
- Package
- SSOP-20
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS8341E/2K5G4 is a viable functional replacement candidate for the ADS8344E, sharing the same 16-bit SAR architecture, 4-channel single-ended/2-channel differential input multiplexer, and 200 kSPS throughput in a matching SSOP-20 package. Designers must validate the reduced analog supply range and the absence of a dedicated reference pin before committing to production, as these differences affect signal-chain headroom and external reference flexibility.
Resolution and Architecture
High match
Input Channel Configuration
High match
Supply Voltage Range
Validation required
Reference Input Architecture
Not compatible
Parts at a glance
Part B
ADS8341E/2K5G4
德州儀器
- Lifecycle
- Active
- Stock
- 9351 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 | ADS8344E | ADS8341E/2K5G4 | 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 into one ADC; the ADS8344E supports twice as many inputs. |
| Sampling Rate | 100 kSPS | 200 kSPS | Maximum throughput affects achievable signal bandwidth and timing margin in the application. |
| Supply Voltage Range | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical supply range means both can operate from the same system rails without level shifting. |
| Interface Type | SPI-compatible serial (QSPI/Microwire) | SPI-compatible serial (QSPI/Microwire) | Same serial interface allows drop-in digital connection compatibility with the host controller. |
| Package | 20-pin SSOP | 16-pin SSOP | Different pin counts and footprints mean the PCB layout must be redesigned; 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 | Identical industrial temperature range means both suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344E | ADS8341E/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 | 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 ADS8344E and ADS8341E/2K5G4?
The ADS8344E is a 16-bit, 4-channel serial ADC, while the ADS8341E/2K5G4 is a 16-bit, 2-channel serial ADC. The ADS8344E provides four single-ended or two differential inputs, whereas the ADS8341 offers two single-ended or one differential input. Both are pin-compatible in the same SSOP-20 package but differ in channel count and input configuration.
Are the ADS8344E and ADS8341E/2K5G4 pin-compatible?
Yes, both devices are offered in a 20-lead SSOP package with the same pinout. However, the ADS8344E uses the additional channel pins for CH2 and CH3, which are not functional on the ADS8341. Designers should verify unused pin handling when substituting.
What is the resolution and sampling rate of these ADCs?
Both the ADS8344E and ADS8341E/2K5G4 are 16-bit successive-approximation ADCs with a maximum sampling rate of 100 kSPS. They operate from a single +2.7 V to +5 V supply and feature a serial SPI/QSPI/MICROWIRE-compatible interface.
What input configurations do these ADCs support?
The ADS8344E supports four single-ended inputs or two differential input pairs. The ADS8341E/2K5G4 supports two single-ended inputs or one differential input pair. Both devices offer a unipolar input range of 0 V to VREF and a bipolar range of ±VREF/2 when configured accordingly.
What does the "2K5G4" suffix on the ADS8341E/2K5G4 indicate?
The "2K5G4" suffix denotes tape-and-reel packaging and lead-free (RoHS-compliant) construction per Texas Instruments' ordering nomenclature. The base device is the ADS8341E, a 16-bit, 2-channel ADC in a 20-lead SSOP package.
Can the ADS8341E/2K5G4 be used as a drop-in replacement for the ADS8344E?
Not as a direct drop-in replacement. Although pin-compatible, the ADS8341E/2K5G4 provides only two input channels versus four on the ADS8344E. Applications requiring CH2 or CH3 must retain the ADS8344E or modify the design to multiplex external signals.
What are the reference voltage and power supply requirements for these devices?
Both ADCs operate from a single supply of +2.7 V to +5 V and require an external reference voltage (VREF) typically in the range of 0.5 V to VDD. The reference input is buffered internally, and the devices feature low power consumption suitable for portable instrumentation applications.
What interface do the ADS8344E and ADS8341E/2K5G4 use for communication?
Both devices use a serial interface compatible with SPI, QSPI, and MICROWIRE protocols. The interface includes CS, DIN, DOUT, DCLK, and BUSY/CS control signals, allowing direct connection to most microcontrollers and DSPs without external glue logic.