Part A
AD7812YRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3695 個数
- Package
- TSSOP-20
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The AD7812YRUZ and AD7813YRU are not drop-in replacements for one another. Although both are 10-bit successive-approximation ADCs from Analog Devices in a TSSOP-16 package, they differ in channel count, digital interface type, and conversion throughput, so a direct board-level substitution is not possible without design changes.
Different channel count
Different digital interface
Different throughput
Different input configuration
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 | AD7813YRU | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 8 | 1 | Determines how many analog signals can be sampled; an 8-channel device can multiplex multiple sensors while a single-channel device handles only one input. |
| Resolution | 10 bit | 10 bit | Sets the quantization granularity of the conversion; both provide 10-bit output, so measurement precision is comparable. |
| Sampling Rate | 350 kSPS | 400 kSPS | Maximum conversion throughput affects the ability to capture fast-changing signals; the AD7813 offers a slightly higher sample rate. |
| Input Type | Single-ended | Single-ended | Defines whether inputs are measured relative to ground or differentially; both are single-ended, so signal conditioning requirements are similar. |
| Interface | Serial (SPI/QSPI/MICROWIRE/DSP) | Parallel | Determines how the ADC connects to a host processor; serial reduces pin count while parallel offers faster bus transfers, so they are not drop-in compatible. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Operating supply range must match the system rail; both support the same 2.7 V to 5.5 V range, easing power design. |
| Package / Case | 16-TSSOP | 16-TSSOP | Footprint and pin count affect PCB layout and assembly; identical 16-TSSOP packages allow the same board footprint. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental limits for reliable operation; matching industrial ranges suit the same application environments. |
| Power Consumption | Low power (CMOS) | Low power (CMOS) | Affects thermal budget and battery life; both use low-power CMOS processes suitable for portable and embedded systems. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7812YRUZ | AD7813YRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | 10 |
| Sampling Rate(Per Second) | 350k | 400k |
| Number of Inputs | 7, 8 | 1 |
| Input Type | Pseudo-Differential, Single Ended | Single Ended |
| Data Interface | DSP | Parallel |
| Configuration | MUX-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, Internal | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What are the key differences between the AD7812YRUZ and the AD7813YRU?
The AD7812YRUZ is a 10-bit, 8-channel successive-approximation ADC with a serial interface, housed in a 20-lead TSSOP package. The AD7813YRU is a 10-bit, single-channel ADC with a parallel interface, housed in a 16-lead TSSOP package. The primary differences are channel count (8 vs. 1) and digital interface type (serial vs. parallel).
Are the AD7812YRUZ and AD7813YRU pin-compatible?
No. The AD7812YRUZ uses a 20-lead TSSOP package, while the AD7813YRU uses a 16-lead TSSOP package. The different pin counts and pin functions mean they are not drop-in replacements for each other.
Do both parts share the same resolution and conversion architecture?
Yes. Both the AD7812YRUZ and AD7813YRU are 10-bit successive-approximation ADCs. They share the same core resolution and conversion method, but differ in input channel count and digital interface.
What is the difference in input channel configuration between the two devices?
The AD7812YRUZ provides 8 analog input channels, making it suitable for multi-channel signal acquisition. The AD7813YRU provides a single analog input channel, making it suitable for single-channel measurement applications.
How do the digital interfaces of the AD7812YRUZ and AD7813YRU differ?
The AD7812YRUZ uses a serial digital interface for communication with a host controller. The AD7813YRU uses a parallel digital interface. This difference affects PCB routing, microcontroller pin usage, and firmware design.
Can the AD7813YRU be used as a replacement for the AD7812YRUZ in an existing design?
No, not as a direct replacement. The AD7813YRU has fewer channels (1 vs. 8), a different package (16-lead vs. 20-lead TSSOP), and a parallel rather than serial interface. A redesign of the analog input path, PCB layout, and digital interface would be required.
Are both devices available in the same package type?
Both are offered in TSSOP packages, but with different lead counts. The AD7812YRUZ is in a 20-lead TSSOP, and the AD7813YRU is in a 16-lead TSSOP. The package family is the same, but the footprint and pinout differ.