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Analog Devices Inc. AD7927BRUZ-REEL
- Part No.:
- AD7927BRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7927BRUZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,056
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Product details
Overview
AD7927BRUZ-REEL 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 0 V to REFIN or 0 V to 2 × REFIN input range selection - used in automotive sensor signal acquisition and industrial data logging systems.
For engineers reviewing the AD7927BRUZ-REEL datasheet, AD7927BRUZ-REEL pinout, AD7927BRUZ-REEL application, or AD7927BRUZ-REEL equivalent, key selection considerations include guaranteed no-missed-codes performance, channel-to-channel isolation of −82 dB at 400 kHz, 70 dB SINAD at 50 kHz, VDRIVE-independent logic interface, and automotive-qualified TSSOP-20 packaging for harsh-environment embedded control.
Technical Context
The AD7927BRUZ-REEL implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and ≤300 ns acquisition time, enabling accurate sampling of wideband analog signals up to 50 kHz without aliasing. Its conversion timing is fully synchronous to the external SCLK (up to 20 MHz), with no pipeline delay and precise CS-controlled sampling on the falling edge.
Internal configuration is managed via a 12-bit write-only control register that sets input range (RANGE bit), output coding (CODING bit), power mode (PM1/PM0), sequencer enable (SEQ/SHADOW), and channel address (ADD2–ADD0). The device supports both single-channel and preprogrammed multi-channel sequencing, including two independent shadow register sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 1 LSB = 0.024% of full-scale range, sufficient for precision sensor digitization in closed-loop control. |
| Throughput Rate | 200 kSPS maximum - enables real-time capture of fast transients such as motor current spikes or vibration harmonics. |
| SINAD | 70 dB minimum at 50 kHz - ensures ≥11.3 effective bits for high-fidelity signal reconstruction in noise-sensitive applications. |
| Channel Count | 8 single-ended inputs - reduces board space and external multiplexer cost in multi-sensor systems like battery monitoring or engine control units. |
| Power Dissipation | 3.6 mW max at 3 V / 200 kSPS - allows continuous high-speed operation in thermally constrained automotive ECUs without forced cooling. |
| Input Range Options | 0 V to REFIN (2.5 V) or 0 V to 2 × REFIN (5 V) - supports flexible sensor interfacing with either ratiometric or absolute reference topologies. |
| VDRIVE Range | 2.7 V to 5.25 V - permits direct connection to 3 V or 5 V microcontrollers without level-shifting, simplifying mixed-voltage system design. |
Pinout & Package
AD7927BRUZ-REEL is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch), qualified for automotive applications (−40°C to +125°C), with exposed pad not connected internally and AGND pins distributed for optimal analog grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCLK) | Serial clock input | Master clock for both data transfer and internal conversion timing; supports up to 20 MHz, enabling 800 ns conversion time. |
| 2 (DIN) | Data input | Loads 12-bit control register on falling SCLK edges; allows dynamic reconfiguration between conversions (e.g., changing channel or range). |
| 3 (CS) | Chip select (active low) | Initiates sampling on falling edge and frames serial data; enables precise deterministic sampling instants for time-critical control loops. |
| 4, 8, 17, 20 (AGND) | Analog ground | Common reference for all analog circuitry; multiple pins reduce ground impedance and improve noise immunity in high-resolution measurement. |
| 5, 6 (AVDD) | Analog power supply | Single 2.7 V–5.25 V supply powers analog core; 4.75–5.25 V required for 0 V to 2 × REFIN input range operation. |
| 7 (REFIN) | Reference input | Accepts 2.5 V ±1% external reference; determines full-scale range and directly impacts gain accuracy and INL performance. |
| 9–16 (VIN0–VIN7) | Analog input channels | Eight single-ended inputs; internally multiplexed to track-and-hold; unused channels must be tied to AGND to prevent noise coupling. |
| 18 (DOUT) | Data output | 3-state serial output delivering 1 leading zero + 3 address bits + 12 data bits (MSB first); compatible with SPI/QSPI/MICROWIRE protocols. |
| 19 (VDRIVE) | Digital I/O power | Independent logic supply enabling seamless interfacing with 3 V or 5 V host processors regardless of AVDD voltage. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic, cycle-accurate sampling control via CS - critical for synchronized multi-axis motion control and real-time feedback systems. |
| Configurable input range | Software-selectable 0 V to REFIN or 0 V to 2 × REFIN via RANGE bit - eliminates need for external op-amp scaling in varying sensor output ranges. |
| Channel sequencer with shadow register | Two independently programmable channel sequences (e.g., VIN0→VIN2→VIN5 then VIN1→VIN4) reduce firmware overhead in periodic sensor polling. |
| VDRIVE decoupled logic interface | Allows direct connection to 3 V or 5 V microcontrollers without level shifters - simplifies PCB layout and improves signal integrity in mixed-voltage designs. |
| Automotive qualification | AEC-Q100 qualified (W version), but AD7927BRUZ-REEL is B-version (−40°C to +85°C); however, TSSOP-20 package and design meet automotive reliability requirements per datasheet footnote. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Simultaneous sampling of throttle position, coolant temperature, intake air pressure, and oxygen sensor outputs in real time. IC Role / Device Role / Timing Role: 8-channel sequenced ADC acquiring synchronized samples at 200 kSPS with sub-μs timing control via CS edge. Use Value: Eliminates external multiplexer and timing logic; 70 dB SINAD ensures accurate combustion optimization under EMI-rich under-hood conditions. |
Use Scenario: Digitizing 8 field sensor signals (4–20 mA transmitters, RTDs, thermocouples) in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: High-accuracy front-end ADC with configurable input range and channel sequencing for flexible I/O mapping. Use Value: Reduces component count by integrating sequencer and reference buffer interface; 12-bit resolution meets Class A industrial measurement standards. |
| Battery Management System (BMS) | Medical Patient Monitor Signal Chain |
|
Use Scenario: Monitoring cell voltages, pack current, and temperature across 8 lithium-ion cells in electric vehicle battery packs. IC Role / Device Role / Timing Role: Low-power, high-SINAD ADC performing rapid sequential sampling with <0.5 μA shutdown current during idle periods. Use Value: Enables precise state-of-charge estimation with <±1 LSB INL; 3.6 mW active power extends standby runtime in always-on BMS architectures. |
Use Scenario: Acquiring ECG, respiration, SpO₂, and NIBP waveforms in portable diagnostic equipment requiring compact, low-noise signal paths. IC Role / Device Role / Timing Role: Precision analog front-end ADC with 8.2 MHz input bandwidth and 70 dB SINAD supporting clean biopotential capture. Use Value: Meets IEC 60601-2-27 requirements for diagnostic ECG; channel isolation >82 dB prevents crosstalk between vital sign channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7923BRUZ-REEL | 4-channel variant of same family; identical architecture, timing, and interface; shares same control register format and sequencer logic. | Lower channel count suits cost-sensitive designs where only 4 sensors require simultaneous monitoring. | Select AD7923BRUZ-REEL when board space or BOM cost constraints justify reduced channel density without sacrificing performance. |
| ADS8325IPW | TI 16-bit, 100 kSPS SAR ADC; higher resolution but lower speed; requires external reference and separate power supplies for analog/digital domains. | Better DC accuracy for static measurements (e.g., strain gauge bridges), but insufficient throughput for dynamic waveform capture above 50 kHz. | Choose ADS8325IPW only when 16-bit resolution is mandatory and 100 kSPS suffices - not a drop-in replacement due to different pinout, timing, and supply architecture. |
Compared with AD7927BRUZ-REEL, AD7923BRUZ-REEL offers identical performance per channel but halves channel count and package size, while ADS8325IPW trades speed and integration for higher resolution and external reference dependency - making AD7927BRUZ-REEL optimal for balanced speed, channel density, and system-level simplicity in automotive and industrial sensing.
Availability
AD7927BRUZ-REEL is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input modules, and battery management systems requiring stable component supply, long-term lifecycle support, and AEC-compliant sourcing assurance.
Supply support for AD7927BRUZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7927BRUZ-REEL belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-speed, low-power, multi-channel data acquisition in automotive, industrial, and medical instrumentation where timing determinism and channel flexibility are critical.
FAQ
What is the maximum sampling rate supported by the AD7927BRUZ-REEL?
The AD7927BRUZ-REEL supports a maximum throughput rate of 200 kSPS, achieved with a 20 MHz SCLK. Conversion time is fixed at 16 SCLK cycles, so at 20 MHz it equals 800 ns. This rate is guaranteed across the full operating temperature range (−40°C to +85°C) and supply range (2.7 V to 5.25 V), making AD7927BRUZ-REEL suitable for real-time control loop sampling in automotive and industrial applications.
Does the AD7927BRUZ-REEL require an external reference voltage?
Yes, the AD7927BRUZ-REEL requires an external reference applied to the REFIN pin. The datasheet specifies 2.5 V ±1% for guaranteed performance, and REFIN directly sets the full-scale input range (0 V to REFIN or 0 V to 2 × REFIN). The device does not include an internal reference; using a precision external reference such as the ADR4525 ensures optimal gain accuracy and low drift over temperature in AD7927BRUZ-REEL-based systems.
Can the AD7927BRUZ-REEL interface directly with a 3.3 V microcontroller?
Yes, the AD7927BRUZ-REEL can interface directly with a 3.3 V microcontroller using its VDRIVE pin. By tying VDRIVE to 3.3 V, all digital I/O (SCLK, DIN, DOUT, CS) operate at 3.3 V logic levels - independent of AVDD, which may be 5 V for wider input range operation. This eliminates level shifters and simplifies interconnect, a key advantage confirmed in the AD7927BRUZ-REEL functional description and timing specifications.
How does the channel sequencer function in the AD7927BRUZ-REEL?
The AD7927BRUZ-REEL's sequencer uses SEQ and SHADOW bits in the control register to enable preprogrammed channel cycling. When SEQ=1 and SHADOW=1, the ADD2–ADD0 bits define the final channel in a consecutive sequence (e.g., VIN0 → VIN1 → ... → VIN5). When SEQ=0 and SHADOW=1, the shadow register is loaded to define two arbitrary non-consecutive sequences. This reduces host processor overhead in AD7927BRUZ-REEL-based data loggers and sensor hubs.
What is the power consumption of the AD7927BRUZ-REEL in full shutdown mode?
In full shutdown mode (PM1=1, PM0=0), the AD7927BRUZ-REEL draws a maximum of 0.5 μA, with typical current around 20 nA. This ultra-low quiescent current enables energy-efficient operation in battery-powered applications such as portable diagnostics or remote telemetry nodes. Power-up time from full shutdown is 1 μs, allowing rapid wake-and-acquire response - a specification explicitly verified in the AD7927BRUZ-REEL timing table.
AD7927BRUZ-REEL 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-REEL FAQ
1.How can I place an order for AD7927BRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7927BRUZ-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 AD7927BRUZ-REEL reliable?
The price and inventory of AD7927BRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7927BRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7927BRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7927BRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7927BRUZ-REEL?
AD7927BRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7927BRUZ-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 AD7927BRUZ-REEL?
For technical support, including AD7927BRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7927BRUZ-REEL requirements.
6.How does Aetrix verify that AD7927BRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7927BRUZ-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 AD7927BRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7927BRUZ-REEL?
All AD7927BRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7927BRUZ-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 AD7927BRUZ-REEL part is unused and in its original packaging.
Return procedure for AD7927BRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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