Part A
ADS7866IDBVR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1287 PCS
- Package
- SOT-23-6
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7887SDCKR and ADS7866IDBVR are both 12-bit micropower SAR analog-to-digital converters sharing a compatible serial interface and similar supply requirements, making them a viable functional replacement candidate. However, the ADS7887SDCKR offers a higher throughput rate while the ADS7866IDBVR provides a wider input voltage range, so the design must be validated against the specific sampling rate and input span requirements of the target application.
Resolution
Validation required
Sample Rate
Validation required
Supply Voltage
High match
Package Type
Validation required
Parts at a glance
Part B
ADS7887SDCKR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 2563 PCS
- Package
- SOT-SC70-6
- 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 | ADS7887SDCKR | ADS7866IDBVR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both converters provide 12-bit resolution, so the achievable measurement granularity is equivalent. |
| Sampling Rate | 1 MSPS | 200 kSPS | The ADS7887 supports a much higher throughput, which matters for fast-changing signals and high-speed acquisition systems. |
| Number of Input Channels | 1 (single-ended) | 1 (single-ended) | Both are single-channel devices, so channel count is not a differentiator for substitutability. |
| Supply Voltage | 2.35 V to 5.25 V | 1.6 V to 3.6 V | The supply ranges differ significantly; the ADS7866 suits low-voltage logic systems while the ADS7887 supports higher supply rails. |
| Interface Type | SPI (serial) | SPI (serial) | Both use a serial SPI-compatible interface, simplifying drop-in replacement at the digital interface level. |
| Package | SOT-23-6 (DCK) | SOT-23-6 (DBV) | Both are offered in a 6-pin SOT-23 package, but the package codes differ, so footprint and pinout should be verified before substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the ADS7887 makes it suitable for harsher environments where the ADS7866 may not be rated. |
| Power Consumption | Approx. 3.5 mW at 3 V, 1 MSPS | Approx. 1.1 mW at 3 V, 200 kSPS | Lower power per conversion favors the ADS7866 in battery-powered designs, while the ADS7887 trades power for speed. |
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 | ADS7866IDBVR | ADS7887SDCKR |
|---|---|---|
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Active |
| Number of Bits | 12 | 10 |
| Sampling Rate(Per Second) | 200k | 1.25M |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | 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 | Supply |
| Voltage - Supply, Analog | 1.2V ~ 3.6V | 2.35V ~ 5.25V |
| Voltage - Supply, Digital | 1.2V ~ 3.6V | 2.35V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the ADS7887SDCKR and ADS7866IDBVR?
The ADS7887SDCKR is a 10-bit, 1-MSPS micropower SAR ADC in a 6-pin SC70 package, while the ADS7866IDBVR is a 12-bit, 200-kSPS micropower SAR ADC in a 6-pin SOT-23 package. The ADS7887 offers higher sample rate and lower resolution, whereas the ADS7866 provides higher resolution at a lower throughput.
Do the ADS7887SDCKR and ADS7866IDBVR have the same pinout and package footprint?
No. The ADS7887SDCKR uses a 6-pin SC70 (DCK) package, and the ADS7866IDBVR uses a 6-pin SOT-23 (DBV) package. Although both are 6-pin micropower SAR ADCs, the package outlines and PCB land patterns differ, so they are not drop-in footprint compatible.
What are the resolution and sampling rate specifications of each device?
The ADS7887SDCKR provides 10-bit resolution with a maximum throughput of 1 MSPS. The ADS7866IDBVR provides 12-bit resolution with a maximum throughput of 200 kSPS. Designs requiring finer quantization should favor the ADS7866, while higher-speed sampling favors the ADS7887.
What is the supply voltage range for the ADS7887SDCKR and ADS7866IDBVR?
Both devices operate from a single 2.7 V to 5.5 V supply, making them suitable for low-power, mixed-signal systems that share a common analog supply rail. Always confirm the exact recommended operating conditions in the respective manufacturer datasheets.
How do the power consumption figures compare between the two ADCs?
Both are micropower SAR converters designed for low-power operation, with consumption scaling with supply voltage and throughput. Because the ADS7887SDCKR runs at up to 1 MSPS and the ADS7866IDBVR at up to 200 kSPS, average power in a given system depends strongly on the actual sampling rate; consult the datasheet power curves for each device at the intended VDD and throughput.
What digital interface do the ADS7887SDCKR and ADS7866IDBVR use?
Both devices provide a serial digital output compatible with SPI/QSPI/MICROWIRE-style interfaces, allowing direct connection to common microcontrollers and DSPs. The frame length differs because the ADS7887 outputs 10 bits and the ADS7866 outputs 12 bits, so host firmware must be configured accordingly.
Can the ADS7887SDCKR and ADS7866IDBVR be used interchangeably in an existing design?
Not directly. They differ in resolution (10-bit vs 12-bit), maximum throughput (1 MSPS vs 200 kSPS), and package (SC70 vs SOT-23). A replacement requires verifying the digital frame format, timing, PCB land pattern, and whether the system needs the higher resolution of the ADS7866 or the higher speed of the ADS7887.