Part A
AD7811YRU
ADI公司
- Lifecycle
- Active
- Stock
- 7280 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The AD7811YRU and AD7811YR are functionally equivalent 10-bit ADC devices from the same manufacturer family, sharing identical core conversion architecture, supply requirements, and temperature specifications. The primary distinction lies in the package and screening grade, making the AD7811YRU a viable functional replacement candidate for the AD7811YR where board footprint and qualification level permit.
Resolution and Architecture
High match
Supply Voltage Range
High match
Package Type
Validation required
Operating Temperature Grade
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7811YRU | AD7811YR | Why it matters |
|---|---|---|---|
| Package / Case | 16-TSSOP (Thin Shrink Small Outline Package) | 16-SOIC (Small Outline Integrated Circuit) | The package footprint determines PCB layout and solderability; these two parts are not drop-in replacements for each other without a board redesign. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, so assembly process compatibility is similar, though the specific land pattern differs by package. |
| Resolution | 10-bit | 10-bit | Resolution defines the smallest measurable analog step; identical resolution means equivalent measurement granularity for the ADC core. |
| Number of Input Channels | 4 single-ended / 3 pseudo-differential | 4 single-ended / 3 pseudo-differential | Channel count and configuration determine how many signals can be monitored; matching values preserve system-level input capability. |
| Sampling Rate | 350 kSPS | 350 kSPS | Throughput sets the maximum signal bandwidth that can be captured; identical 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 the same power design for either part. |
| Interface Type | SPI / QSPI / MICROWIRE compatible serial | SPI / QSPI / MICROWIRE compatible serial | The digital interface must match the host controller; identical serial protocols ensure firmware compatibility across both parts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for industrial versus commercial environments; matching ranges preserve environmental ratings. |
| Pin Count | 16 | 16 | Pin count affects routing and socket compatibility; both being 16-pin simplifies functional substitution at the schematic level. |
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 | AD7811YRU | AD7811YR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 10 | 10 |
| Sampling Rate(Per Second) | 350k | 350k |
| Data Interface | SPI, DSP | SPI, DSP |
| Number of A/D Converters | 1 | 1 |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What is the difference between the AD7811YRU and AD7811YR?
The AD7811YRU and AD7811YR are both 10-bit, 4-channel sampling ADCs from Analog Devices, but they differ in package and temperature grade. The AD7811YRU is supplied in a 16-lead TSSOP (RU suffix) and the AD7811YR is supplied in a 16-lead SOIC (R suffix). Both are specified over the industrial temperature range of −40°C to +85°C.
Are the AD7811YRU and AD7811YR functionally identical?
Yes. Both devices share the same core: a 10-bit successive-approximation ADC with a 4-channel input multiplexer, on-chip track-and-hold, and a serial interface. The electrical specifications and conversion performance are the same; the only differences are the package type and the corresponding pinout/land pattern.
Can the AD7811YRU be used as a drop-in replacement for the AD7811YR?
No, not as a drop-in replacement. Although the die and specifications are equivalent, the AD7811YRU is a 16-lead TSSOP and the AD7811YR is a 16-lead SOIC. The package footprints and PCB land patterns differ, so a board designed for one package cannot accept the other without layout changes.
What are the key specifications shared by the AD7811YRU and AD7811YR?
Both parts are 10-bit ADCs with a 4-channel multiplexer, a serial (SPI/QSPI-compatible) interface, and a single 2.7 V to 5.5 V supply. They offer a throughput rate of up to 350 kSPS and include an on-chip track-and-hold. These parameters are common to both package variants.
Which package should I choose, the AD7811YRU or the AD7811YR?
Choose based on board space and assembly requirements. The AD7811YRU (16-lead TSSOP) offers a smaller footprint for space-constrained designs, while the AD7811YR (16-lead SOIC) provides a larger, more conventional land pattern that may be easier to inspect and rework. Both are rated for the industrial temperature range.
Do the AD7811YRU and AD7811YR have the same pin functions?
The pin functions are equivalent, but the physical pin assignments differ because the two packages have different pinouts. Designers must consult the respective datasheet pin configuration for each package before routing the PCB; the signals (analog inputs, reference, serial clock, data, and supply pins) are the same in function.
Are the AD7811YRU and AD7811YR both RoHS compliant?
RoHS compliance depends on the specific orderable part number and its suffix. The base AD7811YRU and AD7811YR part numbers should be verified against the manufacturer's ordering guide and the distributor's compliance data for the exact variant ordered, as lead-free/RoHS status is indicated by additional suffix codes.