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Analog Devices Inc. AD7823YRMZ-REEL
- Part No.:
- AD7823YRMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7823YRMZ-REEL.pdf
- Description:
- IC ADC 8BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,493
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Product details
Overview
AD7823YRMZ-REEL from Analog Devices is an 8-bit successive approximation ADC with inherent track-and-hold, 4 µs typical conversion time, 2.7 V to 5.5 V single-supply operation, and microcontroller-compatible 3-wire serial interface (CONVST/SCLK/DOUT), used in battery-powered portable instrumentation for precise analog-to-digital conversion.
For engineers reviewing the AD7823YRMZ-REEL datasheet, AD7823YRMZ-REEL pinout, AD7823YRMZ-REEL application, or AD7823YRMZ-REEL equivalent, key selection criteria include guaranteed 8-bit no-missing-codes performance, –40°C to +125°C industrial temperature range, automatic power-down mode enabling 570 µW at 10 kSPS, and pseudo-differential input architecture supporting offset cancellation in sensor front-ends.
Technical Context
The AD7823YRMZ-REEL implements a charge redistribution DAC-based SAR architecture with internal oscillator, acquiring input signals during track mode and converting via successive approximation in 4 µs typ. Its pseudo-differential input (VIN+, VIN–) supports unipolar 0 V to VREF ranges and enables system-level offset compensation when VIN– carries a fixed bias.
It operates in two distinct modes: Mode 1 (high-speed, no inter-conversion power-down) achieves up to 133 kSPS throughput, while Mode 2 uses CONVST edge timing to enable automatic power-down-powering up only for conversion and settling, reducing average power to 54 µW at 1 kSPS with 1.5 µs power-up time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with guaranteed no missing codes-ensures monotonic transfer function for reliable control loop feedback. |
| Conversion Time | 4 µs typical-enables real-time sampling of fast transients in portable test equipment. |
| Supply Range | 2.7 V to 5.5 V single supply-supports direct integration with Li-ion (3.0–4.2 V) and 3.3 V/5 V logic domains without level shifters. |
| Power Dissipation | 570 µW at 10 kSPS in automatic power-down mode-extends battery life in handheld meters and data loggers. |
| Input Range | 0 V to VREF, with VREF = 1.2 V to VDD-allows flexible reference scaling; VREF tied to VDD eliminates external reference component. |
| Temperature Range | –40°C to +125°C-qualified for under-hood automotive sensors and industrial motor drives. |
| Relative Accuracy | ±0.5 LSB max-meets precision requirements for 8-bit sensor digitization without calibration. |
Pinout & Package
AD7823YRMZ-REEL is housed in an 8-lead microSOIC package (RM-8), 3 mm × 3 mm, 0.65 mm pitch, moisture sensitivity level 1, rated for surface-mount reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CONVST | Convert Start / Serial Enable | Falling edge initiates conversion and enters hold mode; rising edge enables serial port-used as chip select in multi-device buses. |
| 2 - VIN+ | Positive Analog Input | Pseudo-differential input node; accepts 0 V to VREF signal-paired with VIN– for offset rejection in current-sense applications. |
| 3 - VIN– | Negative Analog Input | Reference node for pseudo-differential operation; must remain stable within ±0.5 LSB during conversion to avoid code errors. |
| 4 - GND | Analog/Digital Ground | Common return for analog and digital circuitry-requires low-impedance star connection to minimize noise coupling. |
| 5 - VREF | Reference Voltage Input | Accepts 1.2 V to VDD; determines full-scale range (LSB = VREF/256)-can be tied directly to VDD to eliminate external reference. |
| 6 - DOUT | Serial Data Output | 3-state CMOS output; shifts out 8-bit result MSB-first on SCLK rising edges-remains functional even during power-down state. |
| 7 - SCLK | Serial Clock Input | Asynchronous clock input; controls bit rate of serial read-compatible with SPI, QSPI, and PIC SSP without glue logic. |
| 8 - VDD | Positive Supply | 2.7 V to 5.5 V single supply powering analog core, digital logic, and internal oscillator-decoupling capacitor required per Figure 6. |
Key Features
| Feature | Design Value |
|---|---|
| Inherent Track-and-Hold | Eliminates need for external sample-and-hold circuit-reduces BOM count and board area in compact portable designs. |
| Automatic Power-Down Mode | Reduces average current to 1 µA standby and 54 µW at 1 kSPS-critical for multi-year battery life in remote IoT sensors. |
| Pseudo-Differential Input Architecture | Enables VIN– biasing to cancel system offsets (e.g., 0.5 V amplifier offset), extending effective dynamic range without software correction. |
| Microcontroller-Compatible Serial Interface | 3-wire (CONVST/SCLK/DOUT), no external logic required-directly interfaces with PIC16C, 8051 (with SCLK inversion), QSPI, and SPI controllers. |
| Wide Operating Temperature Range | Specified from –40°C to +125°C-supports deployment in harsh environments including automotive engine compartments and industrial PLC I/O modules. |
Applications
| Battery-Powered Handheld Multimeter | Automotive Cabin Temperature Sensor |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage, current, and resistance with auto-ranging and LCD display. IC Role / Device Role / Timing Role: Primary 8-bit ADC digitizing conditioned analog inputs from shunt resistors, voltage dividers, and thermistors. Use Value: 4 µs conversion time enables rapid auto-ranging; automatic power-down extends alkaline battery life beyond 200 hours of active use. | Use Scenario: Digital climate control unit monitoring NTC thermistor voltage in vehicle cabin air ducts. IC Role / Device Role / Timing Role: Precision analog front-end ADC capturing thermistor voltage with offset cancellation via VIN– bias. Use Value: Pseudo-differential input rejects common-mode noise from 12 V power rail switching; –40°C to +125°C rating ensures reliability across all vehicle operating conditions. |
| Industrial Motor Current Monitor | Portable Gas Detector Signal Chain |
Use Scenario: DIN-rail mounted module measuring phase current via isolated shunt amplifiers in 3-phase AC drives. IC Role / Device Role / Timing Role: High-speed 8-bit ADC sampling amplified shunt voltage at ≥10 kSPS for RMS calculation and overcurrent detection. Use Value: 570 µW power at 10 kSPS allows continuous monitoring without thermal derating in enclosed enclosures; SOIC/microSOIC package supports automated assembly. | Use Scenario: Intrinsically safe handheld gas detector using electrochemical sensors with low-level mV outputs. IC Role / Device Role / Timing Role: Low-power ADC digitizing conditioned sensor output while minimizing self-heating in explosion-proof housing. Use Value: 2.7 V minimum supply enables direct operation from single-cell LiFePO₄ (2.8–3.6 V); 125°C rating accommodates internal heat buildup during extended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7810YRMZ-REEL | 10-bit resolution, same 8-lead microSOIC package, 4 µs conversion, identical pinout and serial interface. | Higher resolution for applications requiring <0.4% full-scale accuracy (e.g., precision pressure transducers). | Select AD7810YRMZ-REEL when 10-bit resolution is mandatory and board layout cannot change; AD7823YRMZ-REEL remains optimal for cost-sensitive 8-bit use cases. |
| MAX1110EUA+T | 8-bit, 5 µs conversion, 2.7–5.25 V supply, SPI-compatible 3-wire interface, 8-pin µMAX package (3.0 × 3.0 mm). | Lower THD (–75 dB vs –70 dB) but no automatic power-down mode; max IDD = 1.5 mA (vs 3.5 mA for AD7823). | Choose MAX1110EUA+T for ultra-low-noise audio or vibration sensing where THD dominates; AD7823YRMZ-REEL preferred when battery life is constrained by duty-cycle. |
Compared with AD7810YRMZ-REEL and MAX1110EUA+T, the AD7823YRMZ-REEL uniquely balances 8-bit precision, 4 µs speed, automatic power-down, and industrial temperature range in a footprint-identical package-making it the most energy-efficient choice for high-volume portable instrumentation.
Availability
AD7823YRMZ-REEL is available at Aetrix Electronics and suitable for battery-powered test equipment, automotive cabin sensors, and industrial motor monitors requiring stable component supply across extended product lifecycles.
Supply support for AD7823YRMZ-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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control systems.
The AD7823 belongs to Analog Devices' legacy high-speed, low-power SAR ADC product line, designed specifically for space-constrained, battery-operated instrumentation requiring guaranteed 8-bit linearity and robust operation across extreme temperatures.
FAQ
What is the guaranteed operating temperature range for the AD7823YRMZ-REEL?
The AD7823YRMZ-REEL is fully specified from –40°C to +125°C across all electrical parameters, including relative accuracy (±0.5 LSB), conversion time (4 µs typ), and power consumption. This range is validated per the Rev. C datasheet and applies to the microSOIC package variant AD7823YRMZ-REEL under standard test conditions with VREF = VDD and GND = 0 V.
Does the AD7823YRMZ-REEL require an external reference voltage?
No, the AD7823YRMZ-REEL does not require an external reference. Its VREF pin accepts 1.2 V to VDD, and tying VREF directly to VDD establishes a 0 V to VDD analog input range with LSB = VDD/256. This eliminates external reference components and reduces system cost and board area-confirmed in the Functional Block Diagram and General Description sections of the AD7823 datasheet.
How does the automatic power-down mode work in the AD7823YRMZ-REEL?
The AD7823YRMZ-REEL enters automatic power-down mode when the CONVST pin remains low at the end of conversion. It powers up on the rising edge of CONVST (1.5 µs power-up time), performs conversion on the subsequent falling edge, latches the result, then powers down. This cycle reduces average power to 54 µW at 1 kSPS-detailed in Figures 13 and 15 and the Power vs. Throughput Rate section of the datasheet.
Is the AD7823YRMZ-REEL pin-compatible with other members of the AD78xx family?
The AD7823YRMZ-REEL shares identical pinout and package (8-lead microSOIC) with AD7810YRMZ-REEL, enabling drop-in 10-bit upgrade. However, it is not pin-compatible with AD7822 (different pin 1 function) or AD7811 (different serial protocol). Pin compatibility is confirmed in the Ordering Guide and Pin Configuration diagrams of the AD7823 Rev. C datasheet.
What is the maximum recommended source impedance for the analog input of the AD7823YRMZ-REEL?
The AD7823YRMZ-REEL analog input has an internal multiplexer resistance of 125 Ω and sampling capacitance of 3.5 pF. For acquisition time ≤100 ns (guaranteed track/hold spec), source impedance should be ≤4.6 kΩ. Lower impedances (e.g., <100 Ω) are recommended for high-THD applications; external 1 nF capacitor on VIN+ further improves AC performance per the AC Acquisition Time section.
AD7823YRMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 200k
- 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 ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7823YRMZ-REEL FAQ
1.How can I place an order for AD7823YRMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7823YRMZ-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 AD7823YRMZ-REEL reliable?
The price and inventory of AD7823YRMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7823YRMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7823YRMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7823YRMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7823YRMZ-REEL?
AD7823YRMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7823YRMZ-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 AD7823YRMZ-REEL?
For technical support, including AD7823YRMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7823YRMZ-REEL requirements.
6.How does Aetrix verify that AD7823YRMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7823YRMZ-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 AD7823YRMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7823YRMZ-REEL?
All AD7823YRMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7823YRMZ-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 AD7823YRMZ-REEL part is unused and in its original packaging.
Return procedure for AD7823YRMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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