Part A
ADS7887SDCKR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2563 Stückzahl
- Package
- SOT-SC70-6
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7887SDCKR and ADS7866IDBVRG4 are both 12-bit micropower SAR analog-to-digital converters offering closely aligned resolution, supply voltage range, and serial interface characteristics, making them a viable functional replacement candidate. However, the ADS7887SDCKR provides a higher sampling rate and a wider input bandwidth than the ADS7866IDBVRG4, and the two devices use different package footprints, so the replacement should be validated against the target application's timing, throughput, and board layout requirements before adoption.
Resolution
High match
Supply Voltage Range
High match
Sampling Rate
Validation required
Package Type
Not compatible
Parts at a glance
Part B
ADS7866IDBVRG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 9976 Stückzahl
- Package
- SOT-23-6
- Series
- Datenerfassung mit 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 | ADS7866IDBVRG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Sampling Rate | 1 MSPS | 200 kSPS | The ADS7887 supports a much higher throughput, which matters for fast-changing signals and higher-bandwidth applications. |
| Number of Input Channels | 1 (single-ended) | 1 (single-ended) | Both are single-channel devices, so channel count is not a differentiator. |
| Input Type | Single-ended | Single-ended | Identical input configuration means both interface to the same signal source topology. |
| Supply Voltage | 2.35 V to 5.25 V | 1.6 V to 3.6 V | The supply ranges differ significantly; the ADS7887 tolerates 5 V systems while the ADS7866 is limited to lower-voltage rails. |
| Interface | SPI / QSPI / Microwire / DSP compatible serial | SPI / QSPI / Microwire / DSP compatible serial | Both use a compatible serial interface, so digital host connectivity is interchangeable. |
| Package | SOT-23-6 (SC-70) | SOT-23-6 | Package footprint compatibility affects PCB layout and drop-in replacement feasibility. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the ADS7887 suits harsher environments where the ADS7866 may not be rated. |
| Power Consumption | Low power (approx. 3.6 mW at 3 V, 1 MSPS) | Low power (approx. 0.6 mW at 3 V, 200 kSPS) | Power draw affects battery life and thermal budget; the ADS7866 is lower power but at reduced throughput. |
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 | ADS7887SDCKR | ADS7866IDBVRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 10 | 12 |
| Sampling Rate(Per Second) | 1.25M | 200k |
| 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 | Supply | External |
| Voltage - Supply, Analog | 2.35V ~ 5.25V | 1.2V ~ 3.6V |
| Voltage - Supply, Digital | 2.35V ~ 5.25V | 1.2V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS7887SDCKR and ADS7866IDBVRG4?
The ADS7887SDCKR is a 10-bit, 1.25-MSPS micropower SAR ADC in a 6-pin SC70 package, while the ADS7866IDBVRG4 is a 12-bit, 200-kSPS micropower SAR ADC in a 6-pin SOT-23 package. The ADS7887 offers higher resolution and a faster maximum throughput, whereas the ADS7866 provides a lower sampling rate with a different package footprint.
Are the ADS7887SDCKR and ADS7866IDBVRG4 pin-compatible?
No. The ADS7887SDCKR uses a 6-pin SC70 (DCK) package, and the ADS7866IDBVRG4 uses a 6-pin SOT-23 (DBV) package. These are different package outlines with different PCB land patterns, so they are not drop-in replacements without layout changes.
What are the resolution and sampling rate specifications for each device?
The ADS7887SDCKR provides 10-bit resolution with a maximum throughput of 1.25 MSPS. The ADS7866IDBVRG4 provides 12-bit resolution with a maximum throughput of 200 kSPS. Designs requiring finer quantization should consider the ADS7866, while higher sample rates favor the ADS7887.
Do both ADCs support the same analog input configuration?
Both devices are single-channel, unipolar, successive-approximation register (SAR) ADCs with a pseudo-differential input structure referenced to a supplied reference voltage. The input voltage range and reference requirements should be confirmed against each device's datasheet for the specific supply and reference conditions in the target design.
What supply voltage ranges do the ADS7887SDCKR and ADS7866IDBVRG4 support?
Both devices are specified for single-supply operation in the 2.35 V to 5.25 V range, with the digital interface compatible with common logic levels. Exact timing and performance limits vary with supply voltage and must be verified from the respective manufacturer datasheets.
Can the ADS7887SDCKR and ADS7866IDBVRG4 share the same SPI interface?
Both devices use a serial interface compatible with SPI, QSPI, and MICROWIRE, with a chip-select, serial clock, and data output. However, the maximum serial clock frequency and conversion timing differ between the 1.25-MSPS ADS7887 and the 200-kSPS ADS7866, so the host controller timing must be configured per device.
Which device is better suited for low-power portable applications?
Both are micropower SAR ADCs intended for portable and battery-powered systems. The ADS7866IDBVRG4 operates at a lower maximum throughput (200 kSPS), which generally allows lower average power consumption at reduced sample rates, while the ADS7887SDCKR trades higher throughput for higher power at full rate. Selection should be based on the required sample rate and power budget verified from the datasheets.