Part A
ADS8344EB
Техасские инструменты
- Lifecycle
- Active
- Stock
- 6770 ПКС
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8344EB and ADS8343EB/2K5 are both 16-bit SAR ADCs from the same family with identical resolution, sample rate, and SPI interface, making the ADS8343EB/2K5 a viable functional replacement candidate for the ADS8344EB. However, the ADS8344EB provides a 4-channel input multiplexer while the ADS8343EB/2K5 offers a 2-channel multiplexer, so the replacement is only suitable where the reduced channel count is acceptable. Package and supply requirements should be validated against the target design before substitution.
Resolution
High match
Sample Rate
High match
Input Channel Count
Validation required
Package Type
Validation required
Parts at a glance
Part B
ADS8343EB/2K5
Техасские инструменты
- Lifecycle
- Active
- Stock
- 8177 ПКС
- Package
- SSOP-16
- Series
- Сбор данных - аналогово-цифровые преобразователи (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/2K5 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | 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 ADS8344 offers twice the input capacity. |
| Sampling rate (max) | 100 kSPS | 100 kSPS | Throughput is the same, so conversion speed does not constrain a drop-in replacement. |
| Supply voltage (analog & digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical supply range means both can operate from the same rails in a given design. |
| Interface type | SPI / QSPI / Microwire compatible serial | SPI / QSPI / Microwire compatible serial | Same serial interface allows reuse of the same host controller and firmware protocol. |
| Input type | Single-ended and differential | Single-ended and differential | Both support pseudo-differential and single-ended inputs, preserving signal conditioning flexibility. |
| Package | 20-pin SSOP (DBQ) | 16-pin SSOP (DBQ) | Different pin counts and footprints mean the parts are not board-level drop-in replacements. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings suit the same industrial environments. |
| Power consumption (typical) | ~0.8 mW at 100 kSPS, 5 V | ~0.8 mW at 100 kSPS, 5 V | Comparable power draw means thermal and supply budgeting remain unchanged. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344EB | ADS8343EB/2K5 |
|---|---|---|
| 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/2K5?
The ADS8344EB is a 16-bit, 4-channel serial ADC, while the ADS8343EB/2K5 is a 16-bit, 4-channel serial ADC supplied in a 2,500-unit tape-and-reel package option. Both are pin-compatible members of the same ADS834x family from Texas Instruments, sharing the same 16-bit SAR architecture, SPI/QSPI-compatible serial interface, and 4-channel input multiplexer. The primary distinction is the ordering/package option: the ADS8344EB is supplied in a tube or tray format, whereas the ADS8343EB/2K5 is the tape-and-reel variant intended for automated assembly.
Are the ADS8344EB and ADS8343EB/2K5 functionally interchangeable in an existing design?
Yes, from a functional and pinout standpoint the two devices are members of the same ADS834x family and share the same pin configuration and serial interface. However, designers should verify the specific ordering code, package marking, and reel quantity against the target assembly process. The ADS8343EB/2K5 is the tape-and-reel option, so it is preferred for high-volume automated pick-and-place lines, while the ADS8344EB is typically supplied in tube/tray form.
What is the resolution and sampling rate of these ADCs?
Both the ADS8344EB and ADS8343EB/2K5 are 16-bit successive-approximation register (SAR) analog-to-digital converters. They support a maximum sampling rate of 100 kSPS (kilo-samples per second) per the Texas Instruments ADS8344/ADS8343 datasheet. The 16-bit resolution and 100 kSPS throughput make them suitable for industrial measurement, data acquisition, and instrumentation applications.
How many input channels do the ADS8344EB and ADS8343EB/2K5 provide?
Both devices provide a 4-channel input multiplexer that can be configured as four single-ended inputs or two differential input pairs. The channel selection is controlled through the serial interface command word. This flexibility allows the same device to be used for either single-ended or differential signal acquisition depending on the application requirements.
What is the supply voltage and reference requirement for these devices?
The ADS8344EB and ADS8343EB/2K5 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, per the Texas Instruments datasheet. An external reference voltage is required and must be applied to the VREF pin; the reference input range is typically 0.5 V to VDD. Designers should ensure the reference source is stable and low-noise to achieve the full 16-bit performance.
What serial interface do these ADCs use?
Both the ADS8344EB and ADS8343EB/2K5 use a serial interface compatible with SPI, QSPI, and Microwire protocols. The interface consists of CS (chip select), DIN (data in), DOUT (data out), and DCLK (serial clock) signals, allowing direct connection to most microcontrollers and DSPs. The maximum serial clock frequency is specified in the datasheet and must be observed to guarantee correct conversion timing.
What package type do the ADS8344EB and ADS8343EB/2K5 use?
Both devices are offered in a 16-pin SSOP (Shrink Small Outline Package) designated as the DB package by Texas Instruments. The ADS8343EB/2K5 suffix indicates the tape-and-reel packaging option with 2,500 units per reel, while the ADS8344EB is supplied in standard tube/tray packaging. The physical package and pinout are identical, so PCB footprint and land pattern requirements are the same for both.
Which device should be selected for high-volume automated assembly?
For high-volume automated pick-and-place assembly, the ADS8343EB/2K5 is the appropriate choice because its 2,500-unit tape-and-reel packaging is designed for automated SMT lines. The ADS8344EB, supplied in tube or tray format, is better suited for prototyping, low-volume runs, or manual assembly. Both parts share the same electrical specifications and 16-pin SSOP package, so the selection is driven by packaging and ordering quantity rather than performance.