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Analog Devices Inc. AD7810YRZ
- Part No.:
- AD7810YRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7810YRZ.pdf
- Description:
- IC ADC 10BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
AD7810YRZ from Analog Devices is a 10-bit successive approximation ADC with inherent track-and-hold, 2.3 µs conversion time, ±1 LSB relative accuracy, and microcontroller-compatible 3-wire serial interface. It operates from a single 2.7 V to 5.5 V supply and is specified over –40°C to +105°C for battery-powered portable instrumentation requiring low-power, high-speed digitization of pseudo-differential analog signals.
For engineers reviewing the AD7810YRZ datasheet, AD7810YRZ pinout, AD7810YRZ application, or AD7810YRZ equivalent, key selection considerations include its automatic power-down mode (1 µA standby), 10 kSPS throughput at only 270 µW, pseudo-differential input architecture, and microSOIC-8 package compatibility with space-constrained embedded sensor interfaces.
Technical Context
The AD7810YRZ implements a charge redistribution DAC-based SAR architecture with internal oscillator and no external clock requirement for conversion timing. Its pseudo-differential input pair (VIN+, VIN–) supports offset cancellation in unipolar current-sense and dc measurement topologies, while the CONVST pin serves dual roles: initiating conversion on falling edge and enabling serial port on rising edge.
Two distinct operating modes are supported: Mode 1 enables continuous high-speed sampling (up to ~350 kSPS depending on SCLK speed), while Mode 2 uses automatic power-down between conversions-powering up in 1.5 µs, converting in 2.3 µs, then returning to 1 µA standby-to achieve ultra-low average power at ≤100 kSPS throughput rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit straight binary output; LSB = VREF/1024, enabling 1 mV resolution with 1.024 V reference. |
| Conversion Time | 2.3 µs maximum; defines minimum inter-conversion interval in Mode 1 and sets active-phase duration in Mode 2. |
| Relative Accuracy | ±1 LSB max over –40°C to +105°C; ensures monotonicity and guarantees no missing codes across full temperature range. |
| Supply Range | 2.7 V to 5.5 V single supply; allows direct integration with 3.3 V or 5 V microcontroller systems without level-shifting. |
| Power Dissipation | 270 µW at 10 kSPS (Mode 2); enables multi-year operation on coin-cell batteries in portable data loggers. |
| Input Type | Pseudo-differential analog input (VIN+, VIN–); permits system-level offset subtraction by applying common-mode voltage to VIN–. |
| Reference Range | VREF = 1.2 V to VDD; supports internal VDD-referenced operation (0 V to VDD input range) with no external reference required. |
Pinout & Package
AD7810YRZ is housed in an 8-lead microSOIC package (RM-8), 3.0 mm × 3.0 mm, 0.65 mm pitch, with exposed pad for thermal enhancement (θJA = 206°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start / Serial Enable | Falling edge initiates conversion and places track-and-hold in hold mode; rising edge enables serial port-enables chip-select functionality in multi-device SPI buses. |
| VIN+ | Positive Analog Input | Primary signal input node; sampled via 3.5 pF internal capacitor; requires ≤125 Ω source impedance for full 10-bit accuracy. |
| VIN– | Negative Analog Input | Common-mode reference for pseudo-differential operation; must remain stable within ±0.5 mV during conversion to avoid code errors. |
| GND | Analog/Digital Ground | Single ground reference for both analog and digital sections; requires low-impedance connection to minimize noise coupling into ADC core. |
| VREF | Reference Voltage Input | Accepts 1.2 V to VDD; when tied to VDD, enables rail-to-rail input range (0 V to VDD) without external precision reference. |
| DOUT | Serial Data Output | Three-state CMOS output; drives 10-bit conversion result MSB-first on rising SCLK edges after CONVST rising edge; enters high-Z after 10th SCLK falling edge. |
| SCLK | Serial Clock Input | Asynchronous clock input controlling data shift rate; compatible with standard SPI/QSPI clocks up to ≥5 MHz (timing validated at 5 V and 3 V supplies). |
| VDD | Positive Supply | 2.7 V to 5.5 V single supply powering analog core, digital logic, and internal oscillator; decoupling capacitor (0.1 µF + 10 µF) required per typical connection diagram. |
Key Features
| Feature | Design Value |
|---|---|
| Inherent Track-and-Hold | Eliminates need for external sample-and-hold circuitry; acquisition time of 100 ns allows direct connection to low-impedance sensors or buffers. |
| Automatic Power-Down | Reduces IDD to 1 µA between conversions in Mode 2; enables 27 µW average power at 1 kSPS-critical for energy harvesting and battery longevity. |
| Microcontroller-Compatible Interface | 3-wire serial protocol (CONVST, SCLK, DOUT) with no glue logic required for PIC, QSPI, or SPI hosts; SCLK inversion optional for 8051 compatibility. |
| Wide Temperature Range | Full 10-bit performance guaranteed from –40°C to +105°C; qualified for industrial and automotive under-hood sensor applications. |
| Small Footprint Packaging | microSOIC-8 (RM-8) footprint saves >50% board area vs. SOIC-8; compatible with standard reflow profiles including vapor phase and infrared soldering. |
Applications
| Battery-Powered Data Logger | Portable Medical Sensor Interface |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and ECG signals in handheld diagnostic devices powered by CR2032 coin cells. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog sensor outputs at 1–10 kSPS using Mode 2 power-down to extend battery life beyond 2 years. Use Value: 270 µW at 10 kSPS and 1 µA standby enable multi-year operation without battery replacement or charging infrastructure. | Use Scenario: Low-noise acquisition of biopotential signals (e.g., pulse oximetry, EMG) in wearable health monitors with strict size and thermal constraints. IC Role / Device Role / Timing Role: Pseudo-differential input rejects common-mode interference from body-coupled noise; 2.3 µs conversion supports real-time waveform capture with minimal latency. Use Value: ±1 LSB linearity and 58 dB SNR ensure clinical-grade fidelity for trend analysis and anomaly detection algorithms. |
| Industrial Field Transmitter | Smart Energy Meter Front-End |
Use Scenario: Digitizing 4–20 mA loop current outputs and thermocouple voltages in explosion-proof process control transmitters operating in harsh ambient conditions. IC Role / Device Role / Timing Role: Operates across –40°C to +105°C with full 10-bit accuracy; VREF tied to VDD simplifies BOM by eliminating external reference IC. Use Value: Guaranteed no missing codes and ±2 LSB gain/offset error support high-precision calibration routines compliant with IEC 61000-4 immunity standards. | Use Scenario: Sampling voltage and current waveforms for real-time power quality analysis in Class 0.5 smart meters with anti-tampering requirements. IC Role / Device Role / Timing Role: 350 kSPS effective throughput (with fast microcontroller SCLK) enables 16× oversampling for harmonic distortion analysis up to 50th order. Use Value: –64 dB THD and –67 dB IMD meet IEC 62053-22 metrology accuracy requirements for revenue-grade metering. |
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 |
|---|---|---|---|
| ADS7822U | 2.2 µs conversion, 2.7–5.25 V supply, SPI-only interface (no CONVST dual-role), 8-pin SOIC only | Lacks automatic power-down; higher 1.25 mA active current limits battery life in intermittent-sampling use cases | Prefer AD7810YRZ when ultra-low average power or microSOIC footprint is required. |
| MAX11100ASA+ | 10-bit, 1.5 µs conversion, internal reference, SPI/QSPI interface, 8-pin SOIC/microSOIC options | No pseudo-differential input; single-ended only; requires external reference if VDD-referencing not acceptable | Choose AD7810YRZ for offset-cancellation capability in dc-coupled sensor front-ends. |
Compared with ADS7822U and MAX11100ASA+, the AD7810YRZ uniquely combines pseudo-differential input architecture, dual-role CONVST pin for simplified bus arbitration, and guaranteed 1 µA power-down current-making it optimal for compact, battery-sensitive, offset-compensated measurement systems where layout area and energy budget are tightly constrained.
Availability
AD7810YRZ is available at Aetrix Electronics and suitable for battery-powered data loggers, portable medical sensors, industrial field transmitters, and smart energy meter front-ends requiring stable component supply across extended product lifecycles.
Supply support for AD7810YRZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The AD7810YRZ belongs to Analog Devices' precision data acquisition portfolio, designed specifically for low-power, high-speed, space-constrained embedded systems requiring reliable 10-bit digitization in demanding environmental conditions.
FAQ
What is the guaranteed operating temperature range for the AD7810YRZ?
The AD7810YRZ is fully specified from –40°C to +105°C. All key parameters-including relative accuracy (±1 LSB), conversion time (2.3 µs), and power consumption-are guaranteed across this industrial temperature range, making it suitable for under-hood automotive sensors and outdoor industrial equipment.
Does the AD7810YRZ require an external reference voltage?
No-the AD7810YRZ supports internal reference operation: connecting VREF directly to VDD establishes a 0 V to VDD analog input range with no external reference needed. This reduces BOM cost and board area while maintaining full 10-bit linearity and SNR performance.
How does the automatic power-down mode work in the AD7810YRZ?
In Mode 2, the AD7810YRZ powers down automatically after each conversion when CONVST remains low. It wakes up in 1.5 µs upon the next CONVST rising edge, then converts in 2.3 µs. This yields 1 µA standby current and enables 27 µW average power at 1 kSPS-ideal for duty-cycled sensor nodes.
Can the AD7810YRZ interface directly with an SPI microcontroller?
Yes-the AD7810YRZ uses a 3-wire serial interface (CONVST, SCLK, DOUT) compatible with standard SPI protocols. CONVST acts as chip select; DOUT is three-state and MSB-first; no level shifters or glue logic are required for PIC, QSPI, or most ARM Cortex-M MCUs.
What is the maximum recommended source impedance for the AD7810YRZ analog inputs?
The AD7810YRZ analog input has an internal 125 Ω switch resistance and 3.5 pF sampling capacitor. For full 10-bit accuracy, source impedance should be ≤125 Ω. With higher impedances (e.g., 2 kΩ+), acquisition time increases significantly-requiring external buffering or longer inter-conversion delays to maintain linearity.
AD7810YRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7810YRZ FAQ
1.How can I place an order for AD7810YRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7810YRZ 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 AD7810YRZ reliable?
The price and inventory of AD7810YRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7810YRZ is usually 5 days.
3.What payment methods are accepted for AD7810YRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7810YRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7810YRZ?
AD7810YRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7810YRZ 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 AD7810YRZ?
For technical support, including AD7810YRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7810YRZ requirements.
6.How does Aetrix verify that AD7810YRZ is sourced from the original manufacturer or authorized distributors?
All AD7810YRZ 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 AD7810YRZ meets industry standards.
7.What is the process for return or replacement of AD7810YRZ?
All AD7810YRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7810YRZ, 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 AD7810YRZ part is unused and in its original packaging.
Return procedure for AD7810YRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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