Part A
AD7812YRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3695 PCS
- Package
- TSSOP-20
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7812YRUZ is a functionally compatible replacement candidate for the AD7812YRU, with both parts sharing the same core ADC architecture, channel count, resolution, and package footprint. The primary distinction is the YRUZ suffix denoting RoHS compliance and lead-free construction, which may affect solder process qualification and regulatory compliance requirements. Designers should validate the lead-free termination finish against their assembly process and confirm moisture sensitivity level handling before substituting in production.
Resolution and Channel Count
High match
Package Type and Footprint
High match
RoHS and Termination Finish
Validation required
Supply Voltage and Interface
High match
Parts at a glance
Part B
AD7812YRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7292 PCS
- Package
- TSSOP-20
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | AD7812YRUZ | AD7812YRU | Why it matters |
|---|---|---|---|
| Number of Channels | 8 | 8 | Determines how many analog input signals the ADC can sample; must match the system's input count for direct substitutability. |
| Resolution | 10 bit | 10 bit | Sets the quantization granularity of the conversion; identical resolution ensures the same measurement precision. |
| Sampling Rate | 350 kSPS | 350 kSPS | Defines the maximum conversion throughput; matching rates preserve timing behavior in the application. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Must be compatible with the system power rail; identical range allows drop-in replacement without supply redesign. |
| Interface Type | Serial (SPI/QSPI/MICROWIRE/DSP-compatible) | Serial (SPI/QSPI/MICROWIRE/DSP-compatible) | Determines compatibility with the host controller's communication bus; matching interface ensures firmware and wiring reuse. |
| Package / Case | 16-TSSOP | 16-TSSOP | Footprint and pinout must match for physical board compatibility; identical package enables direct PCB substitution. |
| RoHS Compliance | RoHS Compliant (lead-free) | Non-RoHS (contains lead) | Affects regulatory compliance and solder process; the Z suffix denotes lead-free, which may be mandatory for new designs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures reliable operation across the application's environmental conditions; matching ranges preserve thermal margins. |
| Mounting Type | Surface Mount | Surface Mount | Must match the assembly method; identical mounting ensures compatibility with existing manufacturing processes. |
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 | AD7812YRUZ | AD7812YRU |
|---|---|---|
| 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 | 7, 8 | - |
| 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 AD7812YRUZ and the AD7812YRU?
The AD7812YRUZ and AD7812YRU are both 10-bit, 8-channel successive-approximation ADCs from Analog Devices in a 20-lead TSSOP package. The primary difference is the suffix: the "Z" designation on the AD7812YRUZ indicates RoHS-compliant, lead-free construction, while the AD7812YRU is the non-RoHS (leaded) version. Functionally and electrically, both parts share the same datasheet specifications.
Are the AD7812YRUZ and AD7812YRU electrically and functionally interchangeable?
Yes. Both devices are the same 10-bit, 8-channel ADC with an on-chip track-and-hold, a serial interface, and a 2.7 V to 5.5 V supply range. They share identical pinout, package (20-lead TSSOP), and specified performance, so they are functionally interchangeable. The only distinction is the RoHS/lead-free status of the package finish.
What is the resolution and channel count of the AD7812YRUZ and AD7812YRU?
Both devices are 10-bit successive-approximation ADCs with 8 analog input channels, configurable as single-ended or pseudo-differential inputs, and they include an on-chip track-and-hold amplifier.
What supply voltage range do the AD7812YRUZ and AD7812YRU support?
Both parts operate from a single supply of 2.7 V to 5.5 V, making them suitable for 3 V and 5 V systems. The specified performance is guaranteed over this supply range per the Analog Devices datasheet.
What interface do the AD7812YRUZ and AD7812YRU use to communicate with a host processor?
Both devices provide a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, allowing direct connection to most microcontrollers and digital signal processors.
Does the "Z" suffix on the AD7812YRUZ affect electrical performance or specifications?
No. The "Z" suffix denotes RoHS compliance and lead-free (Pb-free) package finishing. It does not change the electrical specifications, resolution, supply range, or functional behavior of the device relative to the AD7812YRU.
Can the AD7812YRUZ be used as a drop-in replacement for the AD7812YRU in an existing design?
Yes, from a functional and footprint standpoint, since both are identical 20-lead TSSOP devices with the same pinout and specifications. The substitution is appropriate where RoHS compliance is required or preferred; designs that must retain leaded (non-RoHS) assembly should continue to use the AD7812YRU.
What package do the AD7812YRUZ and AD7812YRU use?
Both devices are supplied in a 20-lead TSSOP (Thin Shrink Small Outline Package), designated by the "RU" code in the part number. The "Z" on the AD7812YRUZ indicates the RoHS-compliant version of that same package.