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Analog Devices Inc. AD7811YR-REEL
- Part No.:
- AD7811YR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7811YR-REEL.pdf
- Description:
- IC ADC 10BIT 4-CHAN SRL 16-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,728
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Product details
Overview
AD7811YR-REEL from Analog Devices is a 10-bit, 4-channel, single-supply SAR analog-to-digital converter with on-chip 2.5 V ±2.5% reference, 2.3 µs conversion time, and DSP/microcontroller-compatible serial interface. It operates from 2.7 V to 5.5 V and supports pseudo-differential or single-ended input configurations for industrial sensor signal acquisition.
For engineers reviewing the AD7811YR-REEL datasheet, AD7811YR-REEL pinout, AD7811YR-REEL application, or AD7811YR-REEL equivalent, key selection considerations include its 350 kSPS throughput, channel configuration flexibility via control register, automatic power-down modes (315 µW @ 10 kSPS), and SOIC-16 package compatibility with multipackage serial bus sharing.
Technical Context
The AD7811YR-REEL implements a charge redistribution DAC-based successive approximation architecture with integrated track-and-hold. Its serial interface uses three-wire frame-sync (TFS/RFS) and SCLK with edge-triggered CONVST for precise timing control.
Channel selection and input mode (single-ended vs. pseudo-differential) are fully software-configurable via a 10-bit write-only control register, enabling dynamic reconfiguration without hardware changes. Power management includes full and partial power-down modes controlled by PD1/PD0 bits, with automatic entry after conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - guarantees no missing codes over full temperature range (–40°C to +105°C) |
| Conversion Time | 2.3 µs - enables up to 350 kSPS sustained sampling rate |
| Input Channels | 4 single-ended or 3 pseudo-differential (VIN1–VIN3 vs. VIN4) - configurable in real time via control register |
| Reference | On-chip 2.5 V ±2.5% - eliminates external reference component; disabled when EXTREF = 1 |
| Supply Range | 2.7 V to 5.5 V - supports battery-powered and industrial 3.3 V/5 V systems |
| Power Dissipation | 10.5 mW at 3 V normal operation; 315 µW at 10 kSPS auto power-down - reduces thermal load in dense layouts |
| THD | –66 dB max at fIN = 30 kHz - suitable for medium-fidelity sensor and control loop digitization |
Pinout & Package
AD7811YR-REEL is housed in a 16-lead Small Outline IC (SOIC) package (R-16A), 7.5 mm × 10.3 mm body, 1.27 mm pitch, RoHS-compliant, with standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | Reference Input | Accepts external reference (1.2 V to VDD) 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–VIN4 | Analog Inputs | Four inputs configurable as single-ended (vs. AGND) or pseudo-differential (e.g., VIN1–VIN4) |
| AGND / DGND | Analog/Digital Ground | Separate ground pins minimize digital switching noise coupling into analog path |
| A0 | Package Address | Hardwired high/low to enable two AD7811YR-REEL devices on shared serial bus |
| TFS / RFS | Frame Sync Inputs | TFS initiates control byte write; RFS enables serial read and supports DSP framing protocols |
| DOUT / DIN | Serial Data I/O | DOUT outputs 10-bit result on rising SCLK edges; DIN accepts 10-bit control byte on falling SCLK edges |
| CONVST | Convert Start | Falling-edge triggered; initiates conversion and determines post-conversion power state |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended or pseudo-differential channel mapping via 10-bit control register - eliminates board redesign for signal routing changes |
| Shared serial bus capability | A0 pin + address bit allows two AD7811YR-REEL units on one 3-wire interface - reduces MCU GPIO count and PCB routing complexity |
| Auto power-down at end of conversion | Configurable full (1 µA) or partial (350 µA) power-down - cuts average power >99% during idle intervals in burst-sampling applications |
| On-chip track-and-hold | 200 ns acquisition time - supports accurate sampling of signals up to ~800 kHz bandwidth without external circuitry |
| Industrial temperature grade | Specified from –40°C to +105°C - validated for motor control, PLC, and automotive body electronics environments |
Applications
| Motor Control Feedback | Industrial Sensor Interface |
|---|---|
Use Scenario: Digitizing current sense, position encoder, and temperature signals in servo drives and inverters. IC Role / Device Role / Timing Role: ADC front-end acquiring synchronized multi-channel analog feedback at ≤350 kSPS with deterministic 2.3 µs latency. Use Value: Enables closed-loop response times <5 µs per cycle using on-chip track-and-hold and fast serial output to FPGA or DSP. | Use Scenario: Reading thermocouples, strain gauges, and pressure transducers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Precision 10-bit digitizer with pseudo-differential input rejection of common-mode noise on long sensor cables. Use Value: Achieves >80 dB channel-to-channel isolation and ±1 LSB relative accuracy without external instrumentation amplifiers. |
| Automotive Body Electronics | Battery Management Monitoring |
Use Scenario: Cabin ambient sensing (temperature, humidity, CO₂) and switch matrix scanning in vehicle ECUs. IC Role / Device Role / Timing Role: Low-power 4-channel ADC operating from 3.3 V supply with automatic power-down between readings. Use Value: Reduces average current to 315 µW at 10 kSPS - extends ECU standby life while maintaining AEC-Q100 Grade 3 qualification. | Use Scenario: Measuring cell voltages and pack temperature in 12 V lead-acid or Li-ion backup systems. IC Role / Device Role / Timing Role: High-impedance input ADC with internal 2.5 V reference, eliminating need for precision external reference in cost-sensitive BMS designs. Use Value: Delivers ±2 LSB gain error match across channels - ensures consistent voltage tracking across multiple cells without per-channel calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7811YRU-REEL | TSSOP-16 package (4.4 mm × 5 mm); 115°C/W θJA; identical electrical specs | Preferred for space-constrained PCBs where SOIC footprint is too large | Select AD7811YRU-REEL when board area is critical and thermal margin allows higher junction temp rise |
| AD7910BRMZ-REEL | 10-bit, 1 MSPS, SPI-compatible, no on-chip reference, 2.35 V to 5.25 V supply | Higher speed but requires external reference and level-shifting for 3.3 V logic | Choose AD7910BRMZ-REEL only if throughput >350 kSPS is mandatory and reference sourcing is acceptable |
Compared with AD7811YR-REEL, AD7811YRU-REEL offers identical performance in a smaller TSSOP package but with higher thermal resistance, while AD7910BRMZ-REEL trades integrated reference and lower power for higher speed and SPI simplicity-neither is pin-compatible, and both require layout changes.
Availability
AD7811YR-REEL is available at Aetrix Electronics and suitable for industrial automation, automotive body control modules, and battery-powered sensor nodes requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified performance.
Supply support for AD7811YR-REEL 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7811YR-REEL belongs to Analog Devices' precision data acquisition product line, designed specifically for cost-sensitive, low-power, multi-channel sensor digitization in harsh environments where reliability and guaranteed specifications across temperature are essential.
FAQ
What is the maximum sampling rate supported by the AD7811YR-REEL?
The AD7811YR-REEL supports a maximum sustained sampling rate of 350 kSPS, enabled by its 2.3 µs conversion time and fast serial interface. This rate assumes continuous conversions with minimal inter-conversion delay and proper timing compliance per the datasheet's t1–t11 specifications. At lower throughput, automatic power-down further reduces average power consumption.
Does the AD7811YR-REEL require an external reference voltage?
No, the AD7811YR-REEL includes an on-chip 2.5 V ±2.5% reference that is active by default. An external reference (1.2 V to VDD) may be used by setting the EXTREF bit in the control register, which disables the internal reference and reduces current draw by ~1 mA. VDD itself can serve as the reference when EXTREF = 1.
Can multiple AD7811YR-REEL devices share the same serial bus?
Yes, two AD7811YR-REEL devices can share a single 3-wire serial bus (SCLK, DOUT/DIN, TFS/RFS) using the A0 package address pin and corresponding address bit in the control register. Each device responds only to control words matching its hardwired A0 state, enabling coordinated multi-channel acquisition without additional MCU GPIOs.
What is the purpose of the CREF pin on the AD7811YR-REEL?
The CREF pin on the AD7811YR-REEL connects to a 10 nF capacitor that stabilizes the internal 2.5 V reference voltage, reducing noise and improving AC performance (e.g., SNR and THD). This capacitor must be placed close to the pin with low-inductance routing; omitting it degrades reference stability and increases quantization noise in high-resolution measurements.
Is the AD7811YR-REEL qualified for automotive applications?
Yes, the AD7811YR-REEL is qualified for automotive applications per AEC-Q100 Grade 3 (–40°C to +105°C), with full electrical specifications guaranteed across this range. It features ESD protection up to 4000 V HBM and is manufactured in Analog Devices' certified automotive-grade process flow, making it suitable for body electronics, climate control, and non-safety-critical chassis systems.
AD7811YR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7811YR-REEL FAQ
1.How can I place an order for AD7811YR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7811YR-REEL 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 AD7811YR-REEL reliable?
The price and inventory of AD7811YR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7811YR-REEL is usually 5 days.
3.What payment methods are accepted for AD7811YR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7811YR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7811YR-REEL?
AD7811YR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7811YR-REEL 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 AD7811YR-REEL?
For technical support, including AD7811YR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7811YR-REEL requirements.
6.How does Aetrix verify that AD7811YR-REEL is sourced from the original manufacturer or authorized distributors?
All AD7811YR-REEL 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 AD7811YR-REEL meets industry standards.
7.What is the process for return or replacement of AD7811YR-REEL?
All AD7811YR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7811YR-REEL, 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 AD7811YR-REEL part is unused and in its original packaging.
Return procedure for AD7811YR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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