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Analog Devices Inc. AD7928WBRUZ-REEL
- Part No.:
- AD7928WBRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7928WBRUZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:832
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Product details
Overview
AD7928WBRUZ-REEL from Analog Devices is a 12-bit, 1 MSPS, 8-channel successive approximation ADC with integrated channel sequencer and flexible input range selection (0 V to REFIN or 0 V to 2 × REFIN). It operates from a single 2.7 V to 5.25 V supply, delivers 70 dB min SINAD at 50 kHz input, and features SPI/QSPI/MICROWIRE/DSP-compatible serial interface in a 20-lead TSSOP package qualified for automotive applications.
For engineers reviewing the AD7928WBRUZ-REEL datasheet, AD7928WBRUZ-REEL pinout, AD7928WBRUZ-REEL application, or AD7928WBRUZ-REEL equivalent, key selection considerations include its 12-bit resolution with guaranteed no missing codes, 1 MSPS throughput with no pipeline delay, VDRIVE-independent serial interface, automotive-grade −40°C to +125°C operation, and low-power shutdown mode (0.5 μA max).
Technical Context
The AD7928WBRUZ-REEL implements a standard SAR architecture with a track-and-hold amplifier supporting >8 MHz input bandwidth and 10 ns aperture delay. Conversion is initiated on the falling edge of CS and synchronized to SCLK, requiring exactly 16 clock cycles per conversion at up to 20 MHz.
It integrates an 8-channel single-ended multiplexer with programmable sequencer controlled via a 16-bit configuration register. Input range scaling (0–REFIN or 0–2×REFIN) and output coding (straight binary or twos complement) are software-selectable, while VDRIVE decouples logic interface voltage (2.7 V–5.25 V) from AVDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonicity and no missing codes across full temperature range. |
| Throughput Rate | 1 MSPS - supports real-time sampling of multi-sensor systems without buffering overhead. |
| SINAD | 70 dB min at 50 kHz - enables accurate measurement of medium-bandwidth analog signals (e.g., motor current, battery voltage monitoring). |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - allows integration into power-constrained embedded and automotive control units. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive ECUs and industrial motor drives. |
| Input Channels | 8 single-ended - reduces external multiplexer count and PCB area in sensor aggregation designs. |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP compatible - interoperates with common microcontrollers without level-shifting. |
Pinout & Package
AD7928WBRUZ-REEL is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch), RoHS-compliant and qualified per AEC-Q100 Grade 1 for automotive use.
| 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 operation. |
| 2 (DIN) | Control register data input | Accepts 16-bit configuration word on falling SCLK edges to set input range, coding, and sequencer mode. |
| 3 (CS) | Chip select / conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial communication. |
| 4, 8, 17, 20 (AGND) | Analog ground reference | Common return for all analog inputs, reference, and internal circuitry; must be star-connected to minimize noise coupling. |
| 5–6 (AVDD) | Analog power supply | Single 2.7 V–5.25 V supply powering analog core; requires local 100 nF + 10 µF decoupling near pins 5/6. |
| 7 (REFIN) | External reference input | Accepts 2.5 V ±1% reference; sets full-scale range and directly impacts gain accuracy and noise floor. |
| 9–16 (VIN0–VIN7) | Analog input channels | Eight single-ended inputs; unused channels must be tied to AGND to prevent noise injection and crosstalk. |
| 18 (DOUT) | Serial data output | MSB-first 12-bit result preceded by leading zero and 3-bit channel address; no trailing zeros for AD7928. |
| 19 (VDRIVE) | Digital I/O power supply | Independent 2.7 V–5.25 V rail enabling direct interface to 3 V or 5 V host processors regardless of AVDD. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True sample-and-hold behavior with deterministic 16-SCLK conversion time-enables precise time-aligned multi-channel acquisition. |
| VDRIVE interface independence | Serial I/O operates at logic levels defined solely by VDRIVE, eliminating level shifters when interfacing with mixed-voltage SoCs. |
| Programmable channel sequencer | Configurable 8-channel scan order via control register-reduces firmware overhead in cyclic sensor monitoring applications. |
| Flexible input range selection | Software-selectable 0–REFIN (straight binary) or 0–2×REFIN (twos complement)-supports both unipolar and bipolar-referenced measurements. |
| Automotive qualification | AEC-Q100 Grade 1 certified with −40°C to +125°C operation and robust ESD protection (1.5 kV HBM)-suitable for engine control and ADAS subsystems. |
Applications
| Motor Control Feedback | Battery Management System |
|---|---|
|
Use Scenario: Real-time sampling of phase currents, DC-link voltage, and temperature sensors in 3-phase inverter drives. IC Role / Device Role / Timing Role: 8-channel SAR ADC performing synchronized acquisition across critical feedback paths with 1 MSPS aggregate rate. Use Value: Enables closed-loop current regulation with <1 µs timing uncertainty and eliminates need for external multiplexers or dual ADCs. |
Use Scenario: Monitoring cell voltages, pack current, and thermal sensors in EV traction battery packs. IC Role / Device Role / Timing Role: High-accuracy 12-bit digitizer for safety-critical voltage measurements with automotive-grade reliability. Use Value: Delivers 70 dB SINAD at 50 kHz to resolve sub-1 mV changes in 4.2 V Li-ion cells, supporting ISO 26262 ASIL-B compliance. |
| Automotive Sensor Hub | Industrial PLC Analog Input Module |
|
Use Scenario: Aggregating signals from multiple vehicle subsystems (e.g., HVAC pressure, brake fluid level, cabin air quality). IC Role / Device Role / Timing Role: Centralized 8-channel ADC with sequencer managing diverse sensor types and update rates. Use Value: Reduces BOM count and board space versus discrete ADC solutions while maintaining −40°C to +125°C operational integrity. |
Use Scenario: Digitizing 4–20 mA loop outputs, thermocouple signals, and RTD bridges in factory automation I/O modules. IC Role / Device Role / Timing Role: Precision front-end ADC with configurable input range and low offset/gain error match across channels. Use Value: Achieves ±1 LSB INL and ±0.5 LSB gain error match-enabling high-channel-count modules without per-channel calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7927WBRUZ-REEL | Same 12-bit/1 MSPS specs but 4-channel (not 8-channel); identical pinout and register map. | Lower channel count limits sensor aggregation capability; suitable only where ≤4 inputs required. | Select AD7927WBRUZ-REEL only if system design uses ≤4 analog inputs and board layout re-use is prioritized. |
| ADS8688IPWR | 16-bit, 500 kSPS, 8-channel SAR ADC with integrated reference and programmable input ranges (±10 V, ±5 V, 0–10 V). | Higher resolution but half the speed; includes internal 4.096 V reference and overvoltage protection up to ±20 V. | Choose ADS8688IPWR when absolute accuracy >12 bits is required and 500 kSPS suffices; avoid if 1 MSPS or automotive qualification is mandatory. |
Compared with AD7927WBRUZ-REEL, AD7928WBRUZ-REEL provides double the channel count without sacrificing speed or power; compared with ADS8688IPWR, it trades resolution and integrated features for higher throughput and AEC-Q100 compliance-making it optimal for automotive real-time control loops.
Availability
AD7928WBRUZ-REEL is available at Aetrix Electronics and suitable for automotive ECU development, industrial motor drive commissioning, and battery management system prototyping requiring stable component supply and long-term lifecycle support.
Supply support for AD7928WBRUZ-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, headquartered in Norwood, MA.
The AD79xx family-including AD7928WBRUZ-REEL-is engineered for high-speed, low-power data acquisition in automotive, industrial, and instrumentation systems where precision, reliability, and multi-channel efficiency are critical.
FAQ
What is the maximum sampling rate of the AD7928WBRUZ-REEL?
The AD7928WBRUZ-REEL achieves a maximum throughput rate of 1 MSPS, corresponding to a minimum conversion time of 800 ns at 20 MHz SCLK. This rate is sustained across the full operating temperature range (−40°C to +125°C) and supply range (2.7 V to 5.25 V), with no pipeline delay affecting timing determinism in the AD7928WBRUZ-REEL.
Does the AD7928WBRUZ-REEL require an external reference voltage?
Yes, the AD7928WBRUZ-REEL requires an external reference applied to the REFIN pin. The device is specified for optimal performance with a 2.5 V ±1% reference, which sets the full-scale input range. Using a different reference voltage alters the effective LSB size and must be accounted for in system calibration-this dependency is inherent to the AD7928WBRUZ-REEL architecture.
Can the AD7928WBRUZ-REEL interface directly with a 3.3 V microcontroller?
Yes, the AD7928WBRUZ-REEL supports direct interfacing with 3.3 V microcontrollers via its VDRIVE pin. When VDRIVE = 3.3 V, all digital inputs (CS, SCLK, DIN) accept 0.7 × 3.3 V = 2.31 V minimum high-level voltage, and DOUT drives to ≥3.1 V high, satisfying standard 3.3 V logic thresholds-no level translation is needed for the AD7928WBRUZ-REEL.
What is the purpose of the sequencer in the AD7928WBRUZ-REEL?
The AD7928WBRUZ-REEL's on-chip sequencer enables automatic, preprogrammed cycling through up to eight analog input channels (VIN0–VIN7) without host processor intervention. Configured via the control register, it reduces firmware overhead in continuous monitoring applications-such as motor phase current sampling-where deterministic, repeatable channel ordering is essential for the AD7928WBRUZ-REEL.
Is the AD7928WBRUZ-REEL qualified for automotive applications?
Yes, the AD7928WBRUZ-REEL is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C, and manufactured in an automotive-capable process flow. Its datasheet specifies automotive-grade SINAD, SNR, and THD parameters, and it meets stringent reliability and ESD requirements (1.5 kV HBM)-making it suitable for engine control, transmission, and ADAS subsystems using the AD7928WBRUZ-REEL.
AD7928WBRUZ-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):
- 1M
- 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 ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- -
AD7928WBRUZ-REEL FAQ
1.How can I place an order for AD7928WBRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7928WBRUZ-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 AD7928WBRUZ-REEL reliable?
The price and inventory of AD7928WBRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7928WBRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7928WBRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7928WBRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7928WBRUZ-REEL?
AD7928WBRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7928WBRUZ-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 AD7928WBRUZ-REEL?
For technical support, including AD7928WBRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7928WBRUZ-REEL requirements.
6.How does Aetrix verify that AD7928WBRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7928WBRUZ-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 AD7928WBRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7928WBRUZ-REEL?
All AD7928WBRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7928WBRUZ-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 AD7928WBRUZ-REEL part is unused and in its original packaging.
Return procedure for AD7928WBRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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