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Analog Devices Inc. AD7812WYRUZ
- Part No.:
- AD7812WYRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7812WYRUZ.pdf
- Description:
- IC ADC 10BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,496
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Product details
Overview
AD7812WYRUZ from Analog Devices is a 10-bit, 8-channel sampling ADC with successive approximation architecture, onboard track-and-hold and 2.5 V ±2.5% internal reference. It operates from a single 2.7 V to 5.5 V supply, achieves 350 kSPS throughput with 2.3 µs conversion time, and supports pseudo-differential or single-ended input configurations for automotive sensor signal acquisition.
For engineers reviewing the AD7812WYRUZ datasheet, AD7812WYRUZ pinout, AD7812WYRUZ application, or AD7812WYRUZ equivalent, this page delivers verified electrical specifications, validated pin functions, confirmed automotive-grade operating range (–40°C to +105°C), and real-world channel configuration options for embedded control and data acquisition systems.
Technical Context
The AD7812WYRUZ implements a charge redistribution DAC-based SAR architecture with integrated oscillator and comparator. Its serial interface uses three-wire DSP/microcontroller-compatible framing (RFS/TFS) and clock (SCLK), supporting simultaneous write-to-control-register and read-from-conversion-register operations.
Channel selection is managed via a 10-bit write-only control register with configurable VIN8/AGND, DIF/SGL, and CH2:CH0 bits - enabling eight single-ended inputs, seven pseudo-differential inputs referenced to VIN8, or four independent pseudo-differential pairs (VIN1/VIN2 through VIN7/VIN8).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - guarantees no missing codes across full temperature range |
| Sampling Rate | 350 kSPS - enables real-time monitoring of fast-changing analog signals up to 30 kHz bandwidth |
| Conversion Time | 2.3 µs - defines minimum inter-conversion interval in high-speed acquisition sequences |
| Reference | 2.5 V ±2.5% internal - eliminates need for external precision reference in cost-sensitive designs |
| Supply Range | 2.7 V to 5.5 V - supports direct connection to 3.3 V or 5 V system rails without LDO |
| Power Dissipation | 10.5 mW at 3 V - scales down to 315 µW at 10 kSPS using automatic power-down mode |
| SNR | 58 dB min at 30 kHz input - sufficient for industrial sensor digitization with >9.5 ENOB |
Pinout & Package
AD7812WYRUZ is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), RU-20 footprint, with 0.65 mm lead pitch and exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | Reference Input | Accepts external 1.2 V to VDD reference or connects to VDD; EXTREF bit must be set to enable |
| CREF | Reference Decoupling | Connects 10 nF capacitor to stabilize internal 2.5 V reference and reduce noise |
| VIN1–VIN8 | Analog Inputs | Eight single-ended or four pseudo-differential input channels; input range = 0 V to VREF |
| A0 | Package Address | Hardware-selectable address pin enabling two AD7812WYRUZ devices on shared serial bus |
| TFS | Transmit Frame Sync | Falling edge initiates 10-bit control byte load into internal register |
| RFS | Receive Frame Sync | Rising edge enables serial output counter; used for DSP compatibility and bus arbitration |
| DOUT | Serial Data Output | Outputs 10-bit conversion result on rising SCLK edges; enters high-Z after 11th pulse |
| DIN | Serial Data Input | Accepts 10-bit control word on falling SCLK edges; requires 13 SCLK pulses per write |
| SCLK | Serial Clock | External clock synchronizes all serial transfers; data latched on falling edge, output on rising edge |
| CONVST | Convert Start | Falling edge triggers track-to-hold transition and initiates conversion sequence |
| AGND / DGND | Analog/Digital Ground | Separate ground pins minimize digital switching noise coupling into analog path |
| VDD | Power Supply | Single 2.7 V–5.5 V supply powers both analog and digital sections |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 2.5 V reference | ±2.5% initial error and 50 ppm/°C drift - reduces BOM count and layout area vs. external reference |
| Pseudo-differential input support | Four independent differential pairs (e.g., VIN1/VIN2) - improves common-mode noise rejection in motor control feedback |
| Hardware/software convert control | Edge-triggered CONVST pin plus software-controlled CONVST bit - enables flexible timing in deterministic real-time systems |
| Automatic power-down mode | 315 µW @ 10 kSPS - extends battery life in portable data loggers without sacrificing wake-up latency |
| Multi-device serial bus sharing | A0 pin + control register address bit - allows daisy-chained 12-channel acquisition using AD7811 + AD7812WYRUZ |
Applications
| Motor Control Feedback | Automotive Sensor Interface |
|---|---|
Use Scenario: Digitizing current-sense amplifier outputs and position encoder signals in BLDC motor drives. IC Role / Device Role / Timing Role: Simultaneous sampling of multiple analog feedback channels with <2.3 µs conversion time and channel-to-channel isolation >80 dB. Use Value: Enables precise field-oriented control (FOC) by capturing synchronized phase currents and rotor position within one control loop period. | Use Scenario: Acquiring signals from oxygen, pressure, and temperature sensors in engine control units (ECUs). IC Role / Device Role / Timing Role: 8-channel single-ended ADC with –40°C to +105°C operation and AEC-Q100 qualification support. Use Value: Reduces component count versus discrete op-amp + ADC solutions while meeting automotive reliability and thermal requirements. |
| Industrial Data Acquisition | Portable Instrumentation |
Use Scenario: Multi-sensor monitoring in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: High-speed sampling of 4–8 process variables (e.g., flow, level, pH) with configurable input ranges and on-chip reference. Use Value: Simplifies calibration and improves long-term stability by eliminating external reference drift and matching errors. | Use Scenario: Battery-powered handheld multimeters and environmental monitors. IC Role / Device Role / Timing Role: Low-power 10-bit ADC with auto power-down, consuming only 315 µW at 10 kSPS. Use Value: Extends operational runtime beyond 100 hours on two AA cells while maintaining 58 dB SNR for accurate measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7812YRUZ | Same die, identical specs, but rated for –40°C to +125°C industrial temp range (vs. AD7812WYRUZ's –40°C to +105°C automotive grade) | Used in non-automotive industrial environments requiring extended high-temp operation | Select AD7812WYRUZ when AEC-Q100 compliance and automotive qualification are required |
| ADS7822U | 12-bit, 200 kSPS, SPI interface, no internal reference - requires external 2.048 V reference and higher supply current (1.2 mA) | Higher resolution needed for precision instrumentation; less integrated than AD7812WYRUZ | Choose AD7812WYRUZ for lower system cost, faster throughput, and reference integration in automotive designs |
Compared with AD7812YRUZ, AD7812WYRUZ provides tighter automotive qualification and guaranteed performance over –40°C to +105°C; compared with ADS7822U, it offers faster sampling, integrated reference, and lower power at the expense of 2-bit resolution - making it optimal for cost- and size-constrained automotive signal acquisition.
Availability
AD7812WYRUZ is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC analog input modules, and portable test equipment requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for AD7812WYRUZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7811/AD7812 product line was designed specifically for high-speed, low-power, multi-channel data acquisition in automotive and industrial embedded systems - emphasizing integration, temperature robustness, and serial interface flexibility.
FAQ
What is the operating temperature range specified for the AD7812WYRUZ?
The AD7812WYRUZ is qualified for automotive applications and operates over a guaranteed temperature range of –40°C to +105°C. This rating is explicitly defined in the Ordering Guide and Absolute Maximum Ratings sections of the official Analog Devices datasheet for AD7812WYRUZ, and aligns with AEC-Q100 Grade 2 requirements.
Does the AD7812WYRUZ include an internal voltage reference, and what is its accuracy?
Yes, the AD7812WYRUZ integrates a 2.5 V on-chip reference with ±2.5% initial accuracy and 50 ppm/°C temperature coefficient. When enabled, this reference powers the ADC core; it is automatically disabled when the EXTREF bit is set, reducing current consumption by ~1 mA.
How many analog input channels does the AD7812WYRUZ support, and what configurations are available?
The AD7812WYRUZ supports eight analog input channels (VIN1–VIN8). These can be configured as eight single-ended inputs referenced to AGND, seven pseudo-differential inputs referenced to VIN8, or four independent pseudo-differential pairs (VIN1/VIN2, VIN3/VIN4, VIN5/VIN6, VIN7/VIN8) - all controlled via the 10-bit software-accessible register.
What serial interface protocol does the AD7812WYRUZ use, and is it compatible with standard microcontrollers?
The AD7812WYRUZ uses a three-wire, DSP/microcontroller-compatible serial interface with RFS (receive frame sync), TFS (transmit frame sync), and SCLK. It supports simultaneous read/write operations and is compatible with SPI-like controllers when configured for frame-sync mode - confirmed in the Functional Block Diagram and Timing Characteristics tables of the AD7812WYRUZ datasheet.
Can multiple AD7812WYRUZ devices share the same serial bus, and how is device addressing handled?
Yes, two AD7812WYRUZ devices can share one serial bus using hardware pin A0 and the package address bit in the control register. The A0 pin is hardwired high or low, and only the device whose A0 state matches the address bit in the received control byte will respond - enabling coordinated 12-channel acquisition when paired with an AD7811.
AD7812WYRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- 7, 8
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7812WYRUZ FAQ
1.How can I place an order for AD7812WYRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7812WYRUZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7812WYRUZ reliable?
The price and inventory of AD7812WYRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7812WYRUZ is usually 5 days.
3.What payment methods are accepted for AD7812WYRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7812WYRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7812WYRUZ?
AD7812WYRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7812WYRUZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7812WYRUZ?
For technical support, including AD7812WYRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7812WYRUZ requirements.
6.How does Aetrix verify that AD7812WYRUZ is sourced from the original manufacturer or authorized distributors?
All AD7812WYRUZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7812WYRUZ meets industry standards.
7.What is the process for return or replacement of AD7812WYRUZ?
All AD7812WYRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7812WYRUZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7812WYRUZ part is unused and in its original packaging.
Return procedure for AD7812WYRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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