Part A
ADS7816U
Texas Instruments
- Lifecycle
- Active
- Stock
- 6722 PCS
- Package
- SOIC-8
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS7816U and ADS7810UB/1K are not drop-in replacements for one another. The ADS7816U is a 12-bit, 200 kSPS successive-approximation ADC in a small 8-pin SOIC package with a serial interface, while the ADS7810UB/1K is a 12-bit, 800 kSPS sampling ADC in a larger 28-pin SOIC package with a parallel interface. Their resolution is the same, but package footprint, pin count, interface type, and sampling throughput differ substantially, so a direct board-level substitution is not possible without redesign.
Different package footprint
Different interface type
Different sampling rate
Different pin count
Parts at a glance
Part B
ADS7810UB/1K
Texas Instruments
- Lifecycle
- Active
- Stock
- 9144 PCS
- Package
- SOIC-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS7816U | ADS7810UB/1K | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so nominal quantization resolution is equivalent for substitutability. |
| Sampling Rate | 200 kSPS | 800 kSPS | The ADS7810UB/1K supports a much higher throughput, which matters for faster signal acquisition requirements. |
| Number of Input Channels | 1 (single-ended) | 1 (single-ended) | Both are single-channel devices, so channel count is not a differentiator for substitution. |
| Input Type | Single-ended | Single-ended | Matching input configuration ensures the same signal conditioning approach can be reused. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Identical supply requirements simplify power rail design when swapping parts. |
| Interface | SPI (serial) | Parallel | The interface differs significantly (serial vs parallel), which affects microcontroller pin count and firmware. |
| Package / Case | 8-SOIC | 28-SOIC | Different package footprints require PCB layout changes, impacting direct drop-in substitutability. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Equivalent temperature ratings mean both suit the same environmental conditions. |
| Reference Type | External | External | Both require an external voltage reference, so reference circuitry can be shared across designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7816U | ADS7810UB/1K |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 200k | 800k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Single Ended |
| Data Interface | SPI | Parallel |
| 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 | External, Internal |
| Voltage - Supply, Analog | 5V | ±5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 70°C |
Frequently asked questions
What are the key differences between the ADS7816U and the ADS7810UB/1K?
The ADS7816U is a 12-bit, 200-kSPS micropower sampling analog-to-digital converter with a single pseudo-differential input, housed in an SOIC-8 package. The ADS7810UB/1K is a 12-bit, 800-kSPS sampling ADC with a 12-bit parallel interface and an internal reference, offered in a 28-pin SOIC package. They differ in resolution-adjacent architecture, sampling rate, interface type, package, and reference configuration.
Are the ADS7816U and ADS7810UB/1K pin-compatible or package-compatible?
No. The ADS7816U uses an 8-pin SOIC (D) package, while the ADS7810UB/1K uses a 28-pin SOIC (DW) package. The pin counts, pin functions, and PCB land patterns are different, so they are not drop-in replacements.
What are the sampling rates of the ADS7816U and ADS7810UB/1K?
The ADS7816U supports a maximum sampling rate of 200 kSPS. The ADS7810UB/1K supports a maximum sampling rate of 800 kSPS.
What digital interfaces do these two ADCs use?
The ADS7816U provides a serial (SPI-compatible) interface for data output. The ADS7810UB/1K provides a 12-bit parallel data output interface, which requires more I/O pins but allows higher throughput.
Do the ADS7816U and ADS7810UB/1K include an internal voltage reference?
The ADS7810UB/1K includes an internal reference and also supports an external reference. The ADS7816U does not include an internal reference and requires an external reference voltage applied to its VREF pin.
What are the analog input configurations of the ADS7816U and ADS7810UB/1K?
The ADS7816U has a single pseudo-differential analog input pair (+IN and -IN). The ADS7810UB/1K provides a single-ended analog input channel with a 0 V to VREF input range.
How do the power supply requirements compare between the ADS7816U and ADS7810UB/1K?
The ADS7816U operates from a single 5 V supply and is specified for micropower operation. The ADS7810UB/1K also operates from a single 5 V supply but is designed for higher-speed operation, resulting in higher power consumption than the ADS7816U.
Can the ADS7816U be used as a direct substitute for the ADS7810UB/1K in an existing design?
No. Because of differences in package, pinout, interface type (serial vs. parallel), sampling rate, and reference configuration, the ADS7816U cannot directly replace the ADS7810UB/1K without a redesign of the board and interface logic.