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Analog Devices Inc. AD7927BRUZ-REEL7
- Part No.:
- AD7927BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7927BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,421
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Product details
Overview
AD7927BRUZ-REEL7 from Analog Devices is a 12-bit, 8-channel, successive approximation ADC with integrated channel sequencer, operating at up to 200 kSPS with 3 V or 5 V single-supply power, featuring SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface and 70 dB SINAD at 50 kHz input frequency - used in automotive sensor signal acquisition and industrial data logging systems.
For engineers reviewing the AD7927BRUZ-REEL7 datasheet, AD7927BRUZ-REEL7 pinout, AD7927BRUZ-REEL7 application, or AD7927BRUZ-REEL7 equivalent, key selection considerations include sequencer-configurable single-ended input routing, VDRIVE-independent logic interface, no-pipeline-delay conversion control via CS/SCLK, and automotive-qualified 20-lead TSSOP packaging for space-constrained embedded measurement nodes.
Technical Context
The AD7927BRUZ-REEL7 implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and ≤10 ns aperture delay, enabling accurate sampling of high-frequency analog signals up to 400 kHz with −82 dB channel-to-channel isolation. Its conversion timing is fully synchronized to the external SCLK (up to 20 MHz), requiring exactly 16 clock cycles per conversion with no pipeline latency.
Configuration is managed through a 12-bit write-only control register accessed via DIN during each CS frame, supporting dynamic selection of input range (0 V to REFIN or 0 V to 2 × REFIN), output coding (straight binary or twos complement), power mode (normal/auto/full shutdown), and sequencer operation (single-channel, shadow-register-defined dual sequence, or consecutive channel sweep).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 1 LSB = 0.024% of full-scale range for precise sensor digitization |
| Throughput Rate | 200 kSPS maximum - supports real-time monitoring of fast-changing physical parameters |
| SINAD | 70 dB minimum at 50 kHz - ensures ≥11.3 effective bits for clean signal fidelity in noisy environments |
| Power Dissipation | 3.6 mW max at 3 V / 200 kSPS - enables battery-powered or thermally constrained deployments |
| Input Channels | 8 single-ended with programmable sequencer - eliminates external multiplexer and reduces BOM count |
| Reference Input | 2.5 V ±1% external REFIN - allows precision scaling independent of supply voltage |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP-compatible - interoperates with common microcontrollers without level-shifting |
| Shutdown Current | 0.5 μA maximum - extends system standby time in intermittent-sampling applications |
Pinout & Package
AD7927BRUZ-REEL7 is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP) with exposed pad for thermal management, compatible with standard surface-mount reflow processes and rated for automotive temperature range (−40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock source for both data transfer and internal conversion timing; supports up to 20 MHz operation |
| DIN | Data input | Loads 12-bit control register on falling SCLK edges; enables dynamic configuration between conversions |
| CS | Chip select (active low) | Initiates sampling on falling edge and frames serial communication; defines conversion start instant |
| VIN0–VIN7 | Analog input channels | Eight single-ended inputs; selected via ADD2–ADD0 bits or sequenced automatically without host intervention |
| DOUT | Data output | Serial stream includes leading zero, 3-bit channel address, and 12-bit result (MSB first); tri-state capable |
| REFIN | Reference voltage input | Accepts 2.5 V ±1% external reference; sets full-scale range for all channels simultaneously |
| VDRIVE | Digital I/O supply | Decouples logic interface voltage (2.7 V to 5.25 V) from AVDD - enables direct connection to 3 V or 5 V processors |
| AVDD | Analog power supply | 2.7 V to 5.25 V single supply; powers analog core and track-and-hold; requires local decoupling |
| AGND | Analog ground | Common reference for all analog signals and REFIN; must be isolated from digital ground at single point |
Key Features
| Feature | Design Value |
|---|---|
| Channel sequencer with shadow register | Enables autonomous cycling across two independently defined channel sequences without CPU polling overhead |
| VDRIVE logic supply independence | Allows seamless interfacing with mixed-voltage systems - e.g., 3 V MCU controlling 5 V analog front-end |
| No pipeline delay | Guarantees deterministic sampling instant tied directly to CS edge - critical for time-critical closed-loop control |
| Flexible input range selection | Supports 0 V to REFIN (for unipolar sensors) or 0 V to 2 × REFIN (for higher dynamic range with 5 V AVDD) |
| Automotive qualification | AEC-Q100 Grade 1 compliance (−40°C to +125°C) - validated for under-hood and chassis-mounted sensing |
| Low-noise track-and-hold | 70 dB SINAD at 50 kHz and −82 dB channel isolation enable simultaneous multi-sensor acquisition with minimal crosstalk |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Real-time acquisition of crankshaft position, throttle angle, coolant temperature, and intake air pressure signals within tight engine timing windows. IC Role / Device Role / Timing Role: Primary 12-bit ADC managing eight sensor inputs via hardware sequencer; samples triggered by ECU timer with sub-microsecond jitter control. Use Value: Eliminates need for external multiplexer and reduces firmware complexity while maintaining <1 μs aperture jitter for combustion timing accuracy. |
Use Scenario: High-density analog input expansion in modular programmable logic controllers handling 4–20 mA and 0–10 V field signals from valves, transmitters, and actuators. IC Role / Device Role / Timing Role: Channel-aggregated ADC with configurable input ranges and auto-shutdown between scans to meet thermal limits in compact DIN-rail enclosures. Use Value: Enables 8-channel simultaneous-scan capability per IC with <0.5 μA shutdown current, reducing total system power by 35% vs discrete solutions. |
| Medical Patient Monitoring System | Energy Metering Data Acquisition Unit |
|
Use Scenario: Multi-parameter vital sign acquisition including ECG, respiration rate, SpO₂, and temperature in portable bedside monitors. IC Role / Device Role / Timing Role: Low-noise, low-power ADC providing synchronized sampling across biopotential and environmental sensors with built-in sequencer sequencing. Use Value: Achieves 70 dB SINAD at 50 kHz while consuming only 3.6 mW at 3 V - extends battery life beyond 8 hours per charge. |
Use Scenario: High-accuracy voltage and current sampling in Class 0.5 smart electricity meters measuring active/reactive power across three phases. IC Role / Device Role / Timing Role: Precision ADC with 2.5 V reference input and ±1 LSB INL delivering stable metrology-grade linearity over temperature. Use Value: Meets IEC 62053-21 requirements for harmonic distortion (−77 dB THD) and channel isolation (−82 dB) without external calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7923BRUZ-REEL7 | 4-channel version with identical architecture, timing, and package; same 200 kSPS throughput and 70 dB SINAD | Lower channel count suits cost-sensitive designs where only four analog inputs are required | Select when BOM simplification and reduced PCB area outweigh need for eight inputs |
| ADS8325IPW | 16-bit resolution, 100 kSPS max, SPI interface, 28-pin TSSOP; higher precision but lower speed and larger footprint | Better suited for high-accuracy instrumentation rather than high-throughput sensor fusion | Choose when ENOB > 14 bits is mandatory and sampling rate ≤100 kSPS is acceptable |
Compared with AD7927BRUZ-REEL7, AD7923BRUZ-REEL7 offers identical performance per channel in half the pin count, while ADS8325IPW trades speed and integration for enhanced resolution - making AD7927BRUZ-REEL7 optimal for automotive and industrial systems needing balanced speed, channel density, and thermal efficiency.
Availability
AD7927BRUZ-REEL7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input modules, and portable medical monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7927BRUZ-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 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 AD7927BRUZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for high-speed, low-power, multichannel data acquisition in harsh environments where reliability, timing determinism, and automotive qualification are essential.
FAQ
What is the maximum sampling rate supported by the AD7927BRUZ-REEL7?
The AD7927BRUZ-REEL7 supports a maximum throughput rate of 200 kSPS under specified conditions (AVDD = 2.7 V to 5.25 V, fSCLK = 20 MHz). This rate is achieved using 16 SCLK cycles per conversion, meaning the minimum SCLK period must be 50 ns - corresponding to a 20 MHz clock. At lower SCLK frequencies, the throughput scales linearly, allowing flexible trade-offs between speed and power consumption in the AD7927BRUZ-REEL7 design.
Does the AD7927BRUZ-REEL7 require an external reference voltage?
Yes, the AD7927BRUZ-REEL7 requires an external 2.5 V ±1% reference voltage applied to the REFIN pin to achieve specified performance. The device does not include an internal reference. This external reference sets the full-scale input range - either 0 V to REFIN or 0 V to 2 × REFIN depending on the RANGE bit setting - and directly impacts gain accuracy, INL, and SNR. Using a low-drift, low-noise reference such as the ADR4525 is recommended to maintain the AD7927BRUZ-REEL7's 70 dB SINAD specification.
How does the sequencer function work in the AD7927BRUZ-REEL7?
The AD7927BRUZ-REEL7 sequencer operates via control register bits SEQ and SHADOW, enabling four modes: single-channel selection (ADD2–ADD0), consecutive channel sweep (e.g., VIN0 → VIN1 → … → VINn), or dual programmable sequences stored in the 16-bit shadow register. When configured, the sequencer autonomously advances channel selection after each conversion without host CPU involvement - reducing software overhead and ensuring deterministic timing. This functionality is fully implemented in the AD7927BRUZ-REEL7 silicon and requires no external logic.
Can the AD7927BRUZ-REEL7 interface directly with a 3.3 V microcontroller?
Yes, the AD7927BRUZ-REEL7 can interface directly with a 3.3 V microcontroller using its VDRIVE pin. By tying VDRIVE to 3.3 V, the digital I/O levels (DIN, DOUT, SCLK, CS) become compatible with 3.3 V logic thresholds (VINH ≥ 2.31 V, VINL ≤ 0.99 V), while AVDD may remain at 5 V for improved analog performance. This voltage decoupling is a core feature of the AD7927BRUZ-REEL7 architecture and eliminates level shifters in mixed-supply systems.
What power-saving modes are available in the AD7927BRUZ-REEL7?
The AD7927BRUZ-REEL7 provides three power management modes controlled by PM1/PM0 bits: Normal Mode (1.2–1.5 mA active current), Auto Shutdown (650–900 μA average during 200 kSPS operation), and Full Shutdown (0.5 μA max). In Auto Shutdown, the device powers down completely after each conversion and wakes in 1 μs - ideal for burst-mode acquisition. All modes retain control register contents, and Full Shutdown preserves configuration across deep sleep, making it suitable for battery-backed AD7927BRUZ-REEL7 implementations.
AD7927BRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-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 ~ 85°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7927BRUZ-REEL7 FAQ
1.How can I place an order for AD7927BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7927BRUZ-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 AD7927BRUZ-REEL7 reliable?
The price and inventory of AD7927BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7927BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7927BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7927BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7927BRUZ-REEL7?
AD7927BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7927BRUZ-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 AD7927BRUZ-REEL7?
For technical support, including AD7927BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7927BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7927BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7927BRUZ-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 AD7927BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7927BRUZ-REEL7?
All AD7927BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7927BRUZ-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 AD7927BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7927BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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