Part A
ADS7841E
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5990 PCS
- Package
- SSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7841ES/2K5 is a functionally compatible replacement candidate for the ADS7841E, sharing the same 12-bit 4-channel SAR architecture, SPI interface, and 16-pin SSOP package. The primary distinction is the tape-and-reel packaging of the ES/2K5 variant, which suits automated high-volume assembly, while electrical and functional characteristics remain equivalent across both orderable part numbers.
Resolution and Architecture
High match
Package Type
High match
Supply Voltage Range
High match
Packaging and Ordering Format
Validation required
Parts at a glance
Part B
ADS7841ES/2K5
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 8265 PCS
- Package
- SSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (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 | ADS7841E | ADS7841ES/2K5 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both parts provide the same conversion resolution, so measurement precision is equivalent. |
| Number of Channels | 4 single-ended / 2 differential | 4 single-ended / 2 differential | Identical input channel configuration allows the same sensor or signal routing in a design. |
| Sampling Rate | 200 kSPS | 200 kSPS | Same maximum throughput supports the same signal bandwidth and timing requirements. |
| Supply Voltage Range | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Equivalent supply range means both can operate from the same system rail without redesign. |
| Interface Type | SPI / Serial | SPI / Serial | Same serial interface ensures firmware and host controller compatibility. |
| Package / Mounting | 16-SSOP (Surface Mount) | 16-SSOP (Surface Mount) | Identical package and footprint allow drop-in board replacement. |
| Packaging / Ordering Format | Tube / Individual | Tape & Reel (2,500 units) | Different packaging affects assembly line handling and minimum order quantity, though the device itself is functionally the same. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same temperature rating ensures equivalent environmental robustness for industrial applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7841E | ADS7841ES/2K5 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Number of Bits | - | 12 |
| Sampling Rate(Per Second) | - | 200k |
| Number of Inputs | - | 4 |
| Input Type | - | Single Ended |
| Data Interface | - | SPI |
| Configuration | - | MUX-S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A/D Converters | - | 1 |
| Architecture | - | SAR |
| Reference Type | - | External |
| Voltage - Supply, Analog | - | 2.7V ~ 3.6V, 5V |
| Voltage - Supply, Digital | - | 2.7V ~ 3.6V, 5V |
| Operating Temperature | - | -40°C ~ 125°C |
Frequently asked questions
What is the difference between the ADS7841E and the ADS7841ES/2K5?
Both are 12-bit, 4-channel, 200-kSPS successive-approximation analog-to-digital converters from Texas Instruments. The ADS7841E is supplied in a 16-pin SSOP (DBQ) package and is typically ordered as a single unit or in standard tube quantities, while the ADS7841ES/2K5 is the same converter in a 16-pin QSOP (DBQ) package supplied on a 2,500-piece tape-and-reel. The "/2K5" suffix denotes the tape-and-reel packaging quantity, not a change in the converter's electrical specification.
Are the ADS7841E and ADS7841ES/2K5 electrically and functionally interchangeable?
Yes. Both variants share the same 12-bit SAR architecture, 4 single-ended or 2 differential input channels, 200-kSPS throughput, SPI-compatible serial interface, and single-supply operation of 2.7 V to 5.25 V. The functional and electrical specifications are identical; the difference is package type and shipping format.
Do the ADS7841E and ADS7841ES/2K5 use the same package footprint?
No. The ADS7841E uses a 16-pin SSOP (DBQ) package, while the ADS7841ES/2K5 uses a 16-pin QSOP (DBQ) package. Although both are 16-pin shrink-style packages, the QSOP body is narrower than the SSOP body, so the PCB land patterns are not identical. A board designed for one package should be checked against the manufacturer's package drawing before accepting the other.
What is the meaning of the "/2K5" suffix on the ADS7841ES/2K5?
The "/2K5" suffix indicates tape-and-reel packaging in quantities of 2,500 units. It is a Texas Instruments ordering-designator for the shipping format and does not indicate a different silicon revision, accuracy grade, or temperature range.
What is the supply voltage and reference requirement for these converters?
Both the ADS7841E and ADS7841ES/2K5 operate from a single supply of 2.7 V to 5.25 V. The external reference voltage (VREF) sets the full-scale input range and must be between 100 mV and VCC; the reference input is high-impedance and is sampled during conversion, so a low-impedance or buffered reference is recommended for full specified accuracy.
What serial interface do the ADS7841E and ADS7841ES/2K5 provide?
Both devices provide an SPI-compatible, 3-wire serial interface (CS, DCLK, DIN/DOUT) that supports clock rates up to 2 MHz. The interface is compatible with most microcontrollers and DSPs and allows the converter to be daisy-chained or shared on a common bus.
What are the operating temperature ranges for these two orderable parts?
The ADS7841E is specified over the -40°C to +85°C industrial temperature range. The ADS7841ES/2K5 is likewise specified over -40°C to +85°C. Both are rated for industrial-grade operation and are not offered in an extended or automotive-qualified grade under these specific orderable part numbers.
Can the ADS7841ES/2K5 be used as a drop-in replacement for the ADS7841E in an existing design?
Only if the PCB land pattern accommodates the QSOP body width used by the ADS7841ES/2K5. Because the SSOP and QSOP packages differ in body width and lead span, a board laid out for the ADS7841E SSOP may not accept the QSOP variant without a footprint review. Electrically the two parts are equivalent, so once package compatibility is confirmed, substitution is acceptable.