Part A
AD7811YRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1568 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7811YRUZ and AD7811YR share the same core 10-bit ADC architecture, channel configuration, and serial interface, making them functionally interchangeable in most designs. The primary distinction is package and temperature grade, so the AD7811YRUZ can serve as a functional replacement for the AD7811YR provided the board layout accommodates the TSSOP package and the target application's thermal environment is validated.
Resolution and Architecture
High match
Channel Count and Input Type
High match
Package Type
Validation required
Operating Temperature Range
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 | AD7811YRUZ | AD7811YR | Why it matters |
|---|---|---|---|
| Package / Mounting | 16-TSSOP (surface mount) | 16-SOIC (surface mount) | Different package footprints require different PCB land patterns, so they are not drop-in board-level substitutes. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Non-RoHS, contains lead | Affects regulatory compliance and solder process compatibility; the Z suffix denotes the lead-free variant. |
| Resolution | 10-bit | 10-bit | Determines the quantization step and achievable measurement precision of the ADC. |
| Number of ADC Inputs | 4 single-ended / 3 pseudo-differential | 4 single-ended / 3 pseudo-differential | Defines how many analog channels can be monitored by the system. |
| Sampling Rate | 350 kSPS | 350 kSPS | Sets the maximum signal bandwidth and conversion throughput the part can support. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Must match the system rail; wide range allows 3 V or 5 V operation. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Determines compatibility with the host microcontroller or DSP bus. |
| On-Chip Reference | Yes (internal reference) | Yes (internal reference) | An internal reference simplifies design and reduces external component count. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Confirms suitability for industrial temperature environments. |
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 | AD7811YRUZ | AD7811YR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | 10 |
| Sampling Rate(Per Second) | 350k | 350k |
| Data Interface | DSP | SPI, DSP |
| Number of A/D Converters | 1 | 1 |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Number of Inputs | 3, 4 | - |
| Input Type | Pseudo-Differential, Single Ended | - |
| Configuration | MUX-S/H-ADC | - |
| Ratio - S / H: ADC | 1:1 | - |
| Architecture | SAR | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | - |
Frequently asked questions
What is the difference between the AD7811YRUZ and the AD7811YR?
The AD7811YRUZ and AD7811YR are both 10-bit, 4-channel sampling ADCs from Analog Devices in a 16-lead TSSOP package. The primary difference is the suffix: the "Z" in AD7811YRUZ denotes RoHS-compliant lead-free construction, while the AD7811YR is the non-RoHS (leaded) version. Both share the same functional specifications and pinout.
Are the AD7811YRUZ and AD7811YR functionally interchangeable?
Yes. Both parts are the same 10-bit, 4-channel ADC with an on-chip track-and-hold, a 2.7 V to 5.5 V supply range, and a serial interface. They differ only in RoHS/lead-free status, so they are functionally interchangeable in designs that do not have a specific leaded-versus-lead-free requirement.
What is the resolution and channel count of the AD7811YRUZ and AD7811YR?
Both devices are 10-bit successive-approximation ADCs with four single-ended analog input channels, an on-chip track-and-hold, and a conversion time of approximately 2.3 µs. They are specified for operation from a single 2.7 V to 5.5 V supply.
What package do the AD7811YRUZ and AD7811YR use?
Both parts are supplied in a 16-lead TSSOP (Thin Shrink Small Outline Package). The "RU" in the part number designates the TSSOP package, and the pinout is identical between the two versions.
Does the AD7811YRUZ meet RoHS requirements while the AD7811YR does not?
Correct. The "Z" suffix on AD7811YRUZ indicates RoHS-compliant, lead-free construction per Analog Devices' part-numbering convention. The AD7811YR lacks the Z suffix and is the non-RoHS, leaded version. Designers with RoHS obligations should select the AD7811YRUZ.
What is the operating temperature range for the AD7811YRUZ and AD7811YR?
Both devices are specified over the industrial temperature range of −40 °C to +85 °C, consistent with the "Y" grade designation in the part number.
What interface do the AD7811YRUZ and AD7811YR provide?
Both parts provide a serial digital interface compatible with SPI/QSPI/MICROWIRE protocols, allowing direct connection to most microcontrollers and DSPs. The interface supports readback of conversion results and configuration of channel selection.
Can the AD7811YR be used as a drop-in replacement for the AD7811YRUZ?
Electrically and functionally, yes, since both share the same die, pinout, and specifications. However, substituting the non-RoHS AD7811YR for the RoHS AD7811YRUZ may violate a product's RoHS compliance declaration, so the substitution should be evaluated against the assembly's regulatory requirements.