Part A
ADS7886SBDBVR
德州儀器
- Lifecycle
- Active
- Stock
- 3915 件
- Package
- SOT-23-6
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS7886SBDBVR and ADS7866IDBVTG4 are both 12-bit, 1 MSPS SAR analog-to-digital converters in 6-pin SOT-23 packages with a single-ended input and SPI-compatible serial interface, making them strong functional replacement candidates. The primary validation point is the supply voltage range, since the ADS7886 operates from 2.35 V to 5.25 V while the ADS7866 is specified for 1.6 V to 3.6 V, so the system rail must be confirmed before substitution.
Resolution and Sample Rate
High match
Package Type
High match
Output Interface
High match
Supply Voltage Range
Validation required
Parts at a glance
Part B
ADS7866IDBVTG4
德州儀器
- Lifecycle
- Active
- Stock
- 5617 件
- Package
- SOT-23-6
- 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 | ADS7886SBDBVR | ADS7866IDBVTG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both converters provide 12-bit resolution, so the digital output code width is identical and no firmware scaling change is required. |
| Sampling Rate | 1 MSPS | 200 kSPS | The ADS7886 supports a much higher throughput; substituting the slower ADS7866 reduces maximum sample rate and may violate timing requirements in fast acquisition systems. |
| Input Type | Single-ended, unipolar | Pseudo-differential, unipolar | The input topology differs; the pseudo-differential front end of the ADS7866 can reject small common-mode offsets, while the single-ended ADS7886 references the negative input to ground. |
| Supply Voltage (Analog and Digital) | 2.35 V to 5.25 V | 1.2 V to 3.6 V | The supply ranges do not overlap at 5 V; the ADS7886 can run from a 5 V rail while the ADS7866 is limited to 3.6 V, directly affecting system power architecture compatibility. |
| Interface | SPI-compatible serial | SPI-compatible serial | Both use a similar serial interface, so the host controller connection is largely compatible, though timing and clock requirements must be rechecked. |
| Package | SOT-23-6 (DBV) | SOT-23-6 (DBV) | Identical package and pin count allow a drop-in footprint match, simplifying board-level substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The ADS7886 offers a wider temperature range, which matters for industrial or automotive environments where the ADS7866's +85 °C limit may be insufficient. |
| Power Consumption | Approximately 4.5 mW at 3 V, 1 MSPS | Approximately 1.1 mW at 3 V, 200 kSPS | The ADS7866 draws less power, which is advantageous in battery-powered designs, but this comes at the cost of lower 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 | ADS7886SBDBVR | ADS7866IDBVTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 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 ADS7886SBDBVR and ADS7866IDBVTG4?
The ADS7886SBDBVR is a 12-bit, 1-MSPS micropower SAR ADC in a SOT-23-6 package, while the ADS7866IDBVTG4 is a 12-bit, 200-kSPS micropower SAR ADC in a SOT-23-6 package. The primary differences are sampling rate (1 MSPS vs 200 kSPS) and the corresponding power consumption and timing characteristics.
Are the ADS7886SBDBVR and ADS7866IDBVTG4 pin-compatible?
Both devices are offered in the same 6-pin SOT-23 (DBV) package and share the same pin functions (VDD, GND, VIN, CS, SCLK, SDO), so they are pin-compatible. However, the higher sampling rate of the ADS7886SBDBVR requires the host to support the faster SPI clock and timing, so firmware and timing must be validated.
What is the maximum sampling rate of each device?
The ADS7886SBDBVR supports a maximum throughput of 1 MSPS. The ADS7866IDBVTG4 supports a maximum throughput of 200 kSPS. The maximum SCLK frequency also differs accordingly and must be checked against the respective datasheet timing requirements.
Do both parts use the same SPI interface?
Yes. Both are serial SAR ADCs using a SPI-compatible interface with CS, SCLK, and SDO pins. The interface protocol is similar, but the maximum SCLK frequency and conversion/acquisition timing differ between the 1-MSPS ADS7886SBDBVR and the 200-kSPS ADS7866IDBVTG4.
What are the supply voltage and reference requirements for these ADCs?
Both devices operate from a single 2.7 V to 5.5 V supply and use the supply voltage as the reference (VDD-referenced). The input voltage range is 0 V to VDD. Verify the exact supply and reference specifications against the respective manufacturer datasheets before design.
Can the ADS7886SBDBVR directly replace the ADS7866IDBVTG4 in an existing design?
Because both are 12-bit, VDD-referenced SAR ADCs in the same 6-pin SOT-23 package with a similar SPI interface, a direct replacement may be possible. However, the ADS7886SBDBVR's 1-MSPS rate requires the host to support faster SCLK timing, and power consumption differs, so the design must be validated against both datasheets.
How do power consumption and package options compare?
Both are micropower SAR ADCs in the 6-pin SOT-23 (DBV) package. Power consumption scales with sampling rate, so the ADS7886SBDBVR at 1 MSPS draws more supply current than the ADS7866IDBVTG4 at 200 kSPS. Consult the respective datasheets for verified supply current and power-down specifications.
What are the typical applications for these two ADCs?
Both are suited to portable and battery-powered systems, sensor interface, and data acquisition where a small package and low power are required. The ADS7886SBDBVR's 1-MSPS rate fits higher-speed signal capture, while the ADS7866IDBVTG4's 200-kSPS rate fits lower-speed, lower-power monitoring applications.