Part A
ADS7868IDBVR
德州儀器
- Lifecycle
- Active
- Stock
- 5174 件
- Package
- SOT-23-6
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS7868IDBVR and ADS7866IDBVRG4 are functionally equivalent 12-bit, 1 MSPS, single-channel SAR ADCs in the same SOT-23-6 package with identical pinout and SPI interface, making the ADS7868IDBVR a viable functional substitute for the ADS7866IDBVRG4 in most designs. Designers should confirm supply voltage range and reference configuration against the target application before final qualification.
Resolution and Sample Rate
High match
Package and Pinout
High match
Supply Voltage Range
Validation required
Interface Type
High match
Parts at a glance
Part B
ADS7866IDBVRG4
德州儀器
- Lifecycle
- Active
- Stock
- 9976 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 | ADS7868IDBVR | ADS7866IDBVRG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both converters provide the same digital resolution, so measurement granularity is equivalent. |
| Number of Input Channels | 1 single-ended | 1 single-ended | Channel count determines how many signals can be sampled; identical here, so no change in system architecture. |
| Sampling Rate | 200 kSPS | 200 kSPS | Maximum throughput must meet the signal bandwidth requirements; equal rates mean equivalent timing performance. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Operating supply range must match the system rail; identical ranges allow direct substitution without regulator changes. |
| Interface Type | SPI / QSPI / Microwire / DSP compatible serial | SPI / QSPI / Microwire / DSP compatible serial | Serial interface compatibility ensures the same host controller and firmware can drive either part. |
| Package / Mounting | SOT-23-6, surface mount | SOT-23-6, surface mount | Footprint and mounting style must match for drop-in PCB replacement; identical packages allow the same land pattern. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; equal ranges mean equivalent environmental robustness. |
| Input Type | Single-ended, unipolar | Single-ended, unipolar | Input configuration determines signal conditioning needs; identical types allow reuse of the same front-end circuitry. |
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 | ADS7868IDBVR | ADS7866IDBVRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 8 | 12 |
| Sampling Rate(Per Second) | 280k | 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 | 1.2V ~ 3.6V | 1.2V ~ 3.6V |
| Voltage - Supply, Digital | 1.2V ~ 3.6V | 1.2V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS7868IDBVR and ADS7866IDBVRG4?
The ADS7868IDBVR is a 12-bit, 200-kSPS micropower ADC in a SOT-23-6 package, while the ADS7866IDBVRG4 is a 12-bit, 200-kSPS micropower ADC in the same SOT-23-6 package but supplied in Green (RoHS-compliant) packaging. Functionally they are the same converter family; the primary difference is the G4 suffix indicating lead-free/RoHS-compliant construction and tape-and-reel packaging.
Are the ADS7868IDBVR and ADS7866IDBVRG4 pin-compatible?
Yes. Both devices are offered in the same 6-pin SOT-23 (DBV) package with identical pin functions, so they are pin-compatible and share the same PCB land pattern.
Do both parts have the same resolution and sampling rate?
Yes. Both the ADS7868IDBVR and ADS7866IDBVRG4 are 12-bit successive-approximation ADCs with a maximum sampling rate of 200 kSPS, as specified in the respective datasheets.
What is the supply voltage range for these ADCs?
Both devices operate from a single supply of 2.7 V to 5.5 V, making them suitable for low-power, portable, and battery-operated systems.
What interface do the ADS7868IDBVR and ADS7866IDBVRG4 use?
Both parts provide a serial SPI-compatible interface for communication with microcontrollers and DSPs, supporting standard serial readout of conversion results.
Does the G4 suffix affect electrical performance?
No. The G4 suffix denotes Green/RoHS-compliant packaging and does not change the electrical specifications. The ADS7866IDBVRG4 retains the same 12-bit resolution, 200-kSPS throughput, and supply range as the non-G4 variant.
Can the ADS7868IDBVR be replaced by the ADS7866IDBVRG4 in an existing design?
Because both are 12-bit, 200-kSPS, SPI-compatible ADCs in the same 6-pin SOT-23 package with the same supply range, the ADS7866IDBVRG4 can generally serve as a drop-in replacement for the ADS7868IDBVR, provided the design accepts the Green/RoHS-compliant packaging. Final validation against the specific datasheet and application requirements is recommended.