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Analog Devices Inc. AD7823YRMZ-REEL7
- Part No.:
- AD7823YRMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7823YRMZ-REEL7.pdf
- Description:
- IC ADC 8BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,336
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Product details
Overview
AD7823YRMZ-REEL7 from Analog Devices is an 8-bit successive approximation ADC with inherent track-and-hold, 4 µs typical conversion time, ±0.5 LSB relative accuracy, and pseudo-differential analog input (VIN+, VIN–), operating from a single 2.7 V to 5.5 V supply and specified over –40°C to +125°C for battery-powered portable instrumentation.
For engineers reviewing the AD7823YRMZ-REEL7 datasheet, AD7823YRMZ-REEL7 pinout, AD7823YRMZ-REEL7 application, or AD7823YRMZ-REEL7 equivalent, key selection considerations include its microcontroller-compatible 3-wire serial interface (CONVST/SCLK/DOUT), automatic power-down mode enabling 570 µW at 10 kSPS, and microSOIC-8 package suitability for space-constrained embedded sensing.
Technical Context
The AD7823YRMZ-REEL7 implements a charge redistribution DAC-based SAR architecture with internal oscillator, supporting two operating modes: Mode 1 (high-speed, no inter-conversion power-down) delivers 4 µs conversion time; Mode 2 (automatic power-down) reduces average power by powering down after each conversion and waking up on CONVST rising edge.
Its pseudo-differential input structure allows offset cancellation by applying system offset to VIN–, provided VIN– variation stays within ±0.5 LSB during conversion; analog input range is 0 V to VREF (1.2 V to VDD), and VREF may be tied directly to VDD to eliminate external reference components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit straight binary output; LSB = VREF/256, enabling precise quantization for low-cost sensor digitization. |
| Conversion Time | 4 µs typical in high-speed mode; defines minimum sampling interval for throughput up to ~133 kSPS with compatible microcontroller interface. |
| Relative Accuracy | ±0.5 LSB maximum; ensures monotonicity and guarantees no missing codes across full 8-bit range. |
| Supply Range | 2.7 V to 5.5 V single supply; supports direct integration into 3.3 V or 5 V embedded systems without level-shifting. |
| Power Dissipation | 570 µW at 10 kSPS in automatic power-down mode; enables multi-year operation on coin-cell batteries in intermittent-sampling applications. |
| Input Type | Pseudo-differential (VIN+, VIN–); permits DC offset rejection and unipolar current measurement via sense resistor without external op-amp. |
| Temperature Range | –40°C to +125°C; qualified for under-hood automotive, industrial monitoring, and harsh-environment portable equipment. |
Pinout & Package
AD7823YRMZ-REEL7 is housed in an 8-lead microSOIC package (RM-8), 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, RoHS-compliant, tape-and-reel format (REEL7). This compact surface-mount package supports high-density PCB layouts in handheld and wearable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CONVST | Convert Start / Serial Enable | Falling edge initiates conversion and places track-and-hold in hold mode; rising edge enables serial port-used as chip select in multi-device SPI buses. |
| 2 - VIN+ | Analog Input (+) | Primary signal input terminal; accepts 0 V to VREF; forms pseudo-differential pair with VIN– for offset compensation. |
| 3 - VIN– | Analog Input (–) | Reference input 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 connection to minimize noise coupling into ADC core. |
| 5 - VREF | Reference Input | Accepts 1.2 V to VDD; determines full-scale range (0 V to VREF); may be connected directly to VDD to eliminate external reference component. |
| 6 - DOUT | Serial Data Output | 3-wire interface output; shifts out 8-bit result MSB-first on rising SCLK edges after CONVST rising edge; high-impedance when inactive. |
| 7 - SCLK | Serial Clock Input | External clock synchronizes data transfer; timing-critical-minimum pulse widths of 25 ns (VDD = 5 V) ensure reliable bit capture. |
| 8 - VDD | Positive Supply | 2.7 V to 5.5 V single supply; powers analog and digital sections; decoupling capacitor required per Figure 6 for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Inherent Track-and-Hold | Eliminates need for external sample-and-hold circuitry; acquisition time ≤100 ns enables accurate sampling of fast-changing signals without external buffering. |
| Automatic Power-Down Mode | Reduces average current to 1 µA max in standby; wake-up time 1.5 µs ensures minimal latency penalty when resuming conversion cycles. |
| Microcontroller-Compatible Serial Interface | 3-wire (CONVST/SCLK/DOUT) interface works natively with PIC, QSPI, and SPI peripherals-no glue logic or level shifters required. |
| Wide Supply & Temp Range | Operates from 2.7 V to 5.5 V and –40°C to +125°C; supports direct integration into automotive body control modules and industrial field sensors. |
| Pseudo-Differential Input Architecture | Enables offset cancellation by applying system-level DC bias to VIN–, simplifying front-end design for current-sense and bridge-sensor applications. |
Applications
| Battery-Powered Test Equipment | Battery-Powered Communications Systems |
|---|---|
Use Scenario: Handheld multimeter measuring voltage, current, and resistance in field service environments with intermittent usage. IC Role / Device Role / Timing Role: ADC digitizing conditioned analog sensor outputs; performs single-shot conversions triggered by button press, leveraging automatic power-down between readings. Use Value: 570 µW power at 10 kSPS extends battery life to >2 years on CR2032; microSOIC-8 footprint minimizes PCB area in compact enclosure. |
Use Scenario: Low-data-rate wireless sensor node transmitting temperature/humidity via BLE or LoRa, requiring periodic analog sensing. IC Role / Device Role / Timing Role: Front-end ADC acquiring sensor outputs before MCU-triggered RF transmission; operates in Mode 2 to minimize quiescent power during sleep intervals. Use Value: 1 µA max IDD in power-down state enables ultra-low sleep current; pseudo-differential input rejects common-mode noise from shared PCB ground planes. |
| Industrial Temperature Monitoring | Automotive Cabin Air Quality Sensing |
Use Scenario: DIN-rail mounted controller reading thermistor or RTD signals in factory automation cabinets with ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: High-accuracy 8-bit digitizer interfacing to precision analog front-end; uses VREF = VDD configuration to simplify BOM and reduce component count. Use Value: ±0.5 LSB relative accuracy ensures <0.2% FS error across –40°C to +125°C; SOIC/microSOIC package options support both through-hole and SMT assembly lines. |
Use Scenario: In-vehicle CO₂ and VOC sensor module mounted near HVAC ducts, exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: ADC converting analog outputs from NDIR or metal-oxide gas sensors; operates continuously at 50 kSPS in high-speed mode during active air quality analysis. Use Value: 2.9 mW power at 50 kSPS balances speed and efficiency; guaranteed operation to +125°C ensures reliability in under-dash mounting locations. |
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-REEL7 | 10-bit resolution, same microSOIC-8 package, 4 µs conversion, but higher 12.5 mW power at 50 kSPS and ±1 LSB INL. | Used where higher resolution is prioritized over power; not drop-in-requires firmware update for 10-bit data handling and revised gain calibration. | Select AD7810YRMZ-REEL7 only if system requires >8-bit precision and can accommodate increased power and software changes. |
| ADS7822U | 8-bit, 4 µs conversion, SPI interface, but 2.7 V to 5.25 V supply, –40°C to +85°C rating, and SOIC-8 only-no microSOIC option. | Suitable for commercial-grade portable instruments; lacks extended temperature qualification and compact microSOIC footprint. | Choose ADS7822U for cost-sensitive, non-automotive designs where extended temp range and smallest package are not required. |
Compared with AD7823YRMZ-REEL7, AD7810YRMZ-REEL7 trades lower power for higher resolution and added complexity, while ADS7822U offers functional equivalence at lower cost but sacrifices industrial temperature range and board-space efficiency.
Availability
AD7823YRMZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered test equipment, industrial temperature monitoring, and automotive cabin air quality sensing requiring stable component supply across long production lifecycles.
Supply support for AD7823YRMZ-REEL7 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 Norwood, MA, with design and manufacturing expertise spanning precision data conversion, power management, and sensor signal conditioning.
The AD7823 belongs to Analog Devices' legacy high-speed, low-power SAR ADC product line, engineered specifically for space- and energy-constrained embedded systems requiring robust performance across extreme industrial and automotive temperature ranges.
FAQ
What is the conversion time of the AD7823YRMZ-REEL7, and how does it vary with operating mode?
The AD7823YRMZ-REEL7 has a typical conversion time of 4 µs in Mode 1 (high-speed, no inter-conversion power-down). In Mode 2 (automatic power-down), the effective conversion cycle includes 1.5 µs power-up time plus 5 µs max SAR conversion, totaling 6.5 µs. Both modes maintain the same 4 µs internal SAR conversion duration-the difference lies in power-state transitions between conversions, not core conversion speed.
Can the AD7823YRMZ-REEL7 operate without an external voltage reference?
Yes, the AD7823YRMZ-REEL7 can operate without an external voltage reference by connecting VREF directly to VDD. This configures the analog input range to 0 V to VDD, eliminating the need for a separate reference IC or resistor divider. The device is fully specified across 2.7 V to 5.5 V with this configuration, and VREF input range is guaranteed from 1.2 V to VDD.
What is the meaning of "pseudo-differential" input in the AD7823YRMZ-REEL7, and how is it used?
The AD7823YRMZ-REEL7's pseudo-differential input uses VIN+ as the primary signal path and VIN– as a reference point that can accept a fixed DC offset (e.g., 0.5 V) to shift the effective input range. During conversion, the sampling capacitor connects to VIN–, so VIN– must remain stable within ±0.5 LSB to avoid errors. For true single-ended use, VIN– is tied to AGND.
Does the AD7823YRMZ-REEL7 support SPI protocol natively, and what interface signals are required?
The AD7823YRMZ-REEL7 uses a 3-wire serial interface (CONVST, SCLK, DOUT) compatible with SPI protocols but not fully SPI-standard compliant-it lacks dedicated CS̅ and MOSI lines. CONVST serves as chip-select and serial-enable; SCLK clocks data out on DOUT. It interfaces directly with PIC, QSPI, and many SPI masters without level shifters, though 8051 users must invert SCLK.
What is the absolute maximum rating for analog input voltage on the AD7823YRMZ-REEL7?
The absolute maximum analog input voltage on VIN+ and VIN– of the AD7823YRMZ-REEL7 is –0.3 V to VDD + 0.3 V. Exceeding this range risks forward-biasing internal ESD diodes, potentially causing latch-up or permanent damage. The recommended operating range is 0 V to VREF, and VREF itself must stay within 1.2 V to VDD for specified performance.
AD7823YRMZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD7823YRMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7823YRMZ-REEL7 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-REEL7 reliable?
The price and inventory of AD7823YRMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7823YRMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7823YRMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7823YRMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7823YRMZ-REEL7?
AD7823YRMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7823YRMZ-REEL7 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-REEL7?
For technical support, including AD7823YRMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7823YRMZ-REEL7 requirements.
6.How does Aetrix verify that AD7823YRMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7823YRMZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7823YRMZ-REEL7?
All AD7823YRMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7823YRMZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for AD7823YRMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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