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Analog Devices Inc. AD7924BRUZ
- Part No.:
- AD7924BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7924BRUZ.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:363
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Product details
Overview
AD7924BRUZ from Analog Devices is a 12-bit, 1 MSPS, 4-channel successive approximation ADC with integrated channel sequencer, operating from a single 2.7 V to 5.25 V supply and delivering 70 dB SNR at 50 kHz input frequency. It features SPI/QSPI/MICROWIRE/DSP-compatible serial interface, 0.5 µA full shutdown current, and 16-lead TSSOP packaging qualified for automotive applications.
For engineers reviewing the AD7924BRUZ datasheet, AD7924BRUZ pinout, AD7924BRUZ application, or AD7924BRUZ equivalent, key selection considerations include its 12-bit resolution with guaranteed no missing codes, flexible 0 V to REFIN or 0 V to 2 × REFIN input range, VDRIVE-independent logic interface, sequencer-controlled multi-channel sampling, and low-power operation across 3 V and 5 V systems.
Technical Context
The AD7924BRUZ implements a standard successive approximation register (SAR) architecture with a wide-bandwidth track-and-hold amplifier supporting >8 MHz input bandwidth. Conversion is initiated on the falling edge of CS and synchronized entirely to the SCLK signal-no pipeline delay is present.
It uses a 2-bit address + 12-bit data serial output format (MSB first), with configurable straight binary or twos complement coding via the control register. The sequencer supports preprogrammed channel cycling across VIN0–VIN3, and analog input range selection (RANGE bit) and output coding (CODING bit) are software-configurable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonicity and no missing codes up to full scale |
| Throughput Rate | 1 MSPS - enables real-time sampling of signals up to ~400 kHz Nyquist bandwidth |
| SNR @ 50 kHz | 70 dB min - supports high-fidelity measurement in sensor and instrumentation applications |
| Supply Range | 2.7 V to 5.25 V AVDD - allows direct integration into 3.3 V or 5 V embedded systems |
| VDRIVE Range | 2.7 V to 5.25 V - decouples logic interface voltage from AVDD for mixed-voltage MCU interfacing |
| Full Shutdown Current | 0.5 µA max - enables ultra-low-power sleep modes in battery-operated devices |
| Input Channels | 4 single-ended (VIN0–VIN3) with hardware sequencer - reduces host processor overhead for multi-sensor polling |
| Reference Input | External 2.5 V ±1% REFIN - provides precision scaling independent of supply rails |
Pinout & Package
AD7924BRUZ is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin assignments follow industry-standard layout for serial ADCs, with dedicated AGND planes and separate analog/digital supply pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock for both data transfer and internal conversion timing; no external clock generator required |
| DIN | Control register data input | Accepts configuration bits (SEQ1/SEQ0, RANGE, CODING) on falling SCLK edges |
| CS | Chip select / conversion trigger | Falling edge initiates sampling; active-low framing for SPI-compatible read/write cycles |
| AGND (Pins 3, 8, 13, 16) | Analog ground reference | Common return for all analog inputs, REFIN, and AVDD; must be star-connected to minimize noise coupling |
| AVDD (Pins 5, 6) | Analog power supply | Single 2.7–5.25 V rail powering core ADC, T/H, and reference buffer; requires local 10 µF + 100 nF decoupling |
| REFIN | External reference input | 2.5 V ±1% precision reference sets full-scale range; high-impedance input (36 kΩ typical) |
| VIN0–VIN3 (Pins 9–12) | Single-ended analog inputs | Four independent channels multiplexed to SAR core; unused pins must be tied to AGND |
| DOUT | Serial data output | MSB-first 16-bit frame: 2 leading zeros + 2 address bits + 12 data bits (no trailing zeros) |
| VDRIVE | Digital I/O supply | Sets logic levels for DIN/DOUT/CS/SCLK independently of AVDD - enables 3 V MCU interfacing with 5 V AVDD |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture ensures deterministic, one-shot conversion with precise sampling instant controlled by CS |
| Configurable input range | Software-selectable 0 V to REFIN or 0 V to 2 × REFIN via RANGE bit - supports both unipolar and pseudo-bipolar sensing |
| VDRIVE decoupled interface | Logic I/O operates at VDRIVE voltage (2.7–5.25 V), independent of AVDD - eliminates level shifters in mixed-supply systems |
| Channel sequencer | Hardware-based preprogrammed channel cycling (e.g., VIN0→VIN1→VIN2→VIN3) reduces firmware overhead and jitter in multi-channel acquisition |
| Automotive qualification | Qualified per AEC-Q100 Grade 3 (−40°C to +125°C) - suitable for engine control, ADAS sensor hubs, and body electronics |
| Low-power shutdown | 0.5 µA max full shutdown current - enables microamp-level system sleep states without sacrificing wake-up latency |
Applications
| Motor Control Feedback | Industrial Sensor Hub |
|---|---|
Use Scenario: Simultaneous sampling of current shunt, bus voltage, and temperature in BLDC motor drives. IC Role / Device Role / Timing Role: 12-bit SAR ADC acquiring four analog feedback signals at 1 MSPS with sequenced channel order and sub-microsecond sampling consistency. Use Value: Enables precise field-oriented control (FOC) with <1 LSB INL error and 70 dB SNR, reducing torque ripple and improving efficiency. |
Use Scenario: Multi-sensor conditioning in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Centralized 4-channel ADC with sequencer managing thermocouple, RTD, pressure, and humidity transducer signals. Use Value: Eliminates external MUX and timing logic; VDRIVE support allows direct connection to 3.3 V FPGA controllers while AVDD runs at 5 V for noise margin. |
| Automotive Battery Monitoring | Medical Instrumentation |
Use Scenario: Cell voltage and temperature monitoring in 12S Li-ion battery packs for EVs and HEVs. IC Role / Device Role / Timing Role: Automotive-grade ADC converting four cell voltages sequentially with 12-bit resolution and 0.5 µA shutdown during idle periods. Use Value: Meets AEC-Q100 requirements; 70 dB SNR ensures accurate state-of-charge estimation even under EMI-rich vehicle environments. |
Use Scenario: High-fidelity physiological signal acquisition in portable ECG or EEG devices. IC Role / Device Role / Timing Role: Low-noise, low-power ADC digitizing amplified biopotential signals from multiple electrodes at 1 MSPS. Use Value: 70 dB SNR and 8.2 MHz full-power bandwidth preserve signal integrity for diagnostic-grade waveform analysis. |
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 |
|---|---|---|---|
| AD7923BRUZ | Same 12-bit, 1 MSPS, 4-channel SAR ADC but with 0 V to VREF input range only (no 0 V to 2×VREF option); identical pinout and serial interface | Lacks flexible input range selection - unsuitable for pseudo-bipolar configurations requiring REFIN-centered coding | Select AD7923BRUZ only when 0 V to VREF operation suffices and cost sensitivity outweighs configurability needs |
| ADS7953IRHBT | Texas Instruments 12-bit, 1 MSPS, 16-channel SAR ADC in 32-pin QFN; higher channel count but larger footprint and no VDRIVE pin | Requires external level shifting for 3 V MCU interfacing; sequencer supports more channels but adds complexity for 4-input use cases | Choose ADS7953IRHBT when expanding beyond 4 channels or needing integrated GPIOs; avoid if board space or logic-level flexibility is constrained |
Compared with AD7923BRUZ, AD7924BRUZ adds critical 0 V to 2 × REFIN range support for bipolar-like measurements; versus ADS7953IRHBT, it offers smaller TSSOP footprint, VDRIVE decoupling, and lower BOM count for 4-channel systems - making it optimal for space-constrained, mixed-voltage industrial and automotive designs.
Availability
AD7924BRUZ is available at Aetrix Electronics and suitable for motor control feedback, industrial sensor hubs, automotive battery monitoring, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7924BRUZ 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 Wilmington, MA, with design and manufacturing operations worldwide.
The AD79xx family-including AD7924BRUZ-is engineered for high-speed, low-power, multi-channel data acquisition in industrial automation, automotive systems, and precision instrumentation where accuracy, timing determinism, and supply flexibility are critical.
FAQ
What is the maximum sampling rate supported by the AD7924BRUZ?
The AD7924BRUZ supports a maximum throughput rate of 1 MSPS (1 million samples per second), achieved with a 20 MHz SCLK frequency and 16 SCLK cycles per conversion. This rate is maintained across its full operating temperature range (−40°C to +125°C) and supply range (2.7 V to 5.25 V). Each conversion delivers a complete 12-bit result with no pipeline delay, making AD7924BRUZ suitable for real-time closed-loop control applications requiring deterministic timing.
Does the AD7924BRUZ require an external reference voltage?
Yes, the AD7924BRUZ requires an external reference voltage 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. It supports two configurations: 0 V to REFIN (unipolar) or 0 V to 2 × REFIN (extended range), selected via the RANGE bit in the control register. No internal reference is provided - REFIN must be externally sourced and properly decoupled with ≥1 µF capacitance.
How does the channel sequencer function in the AD7924BRUZ?
The AD7924BRUZ channel sequencer is a hardware-based feature that automatically cycles through up to four single-ended inputs (VIN0–VIN3) in a preprogrammed order defined by SEQ1 and SEQ0 bits in the control register. Once enabled, it eliminates the need for repeated host writes to select channels - conversions occur autonomously in sequence, reducing CPU load and minimizing inter-channel timing jitter. The sequencer operates synchronously with CS and SCLK, ensuring deterministic sampling intervals.
Can the AD7924BRUZ interface directly with a 3.3 V microcontroller while using a 5 V analog supply?
Yes, the AD7924BRUZ supports this configuration via its dedicated VDRIVE pin. By applying 3.3 V to VDRIVE and 5 V to AVDD, the digital interface (CS, SCLK, DIN, DOUT) operates at 3.3 V logic levels while the analog core runs at 5 V for improved noise immunity and dynamic range. This eliminates external level shifters and simplifies mixed-voltage system design - a capability confirmed in the AD7924BRUZ datasheet Rev. C timing and interface specifications.
Is the AD7924BRUZ qualified for automotive applications?
Yes, the AD7924BRUZ is qualified for automotive applications under AEC-Q100 Grade 3, rated for operation from −40°C to +125°C. It meets stringent reliability, ESD (1.5 kV HBM), and thermal performance requirements for use in engine control units, battery management systems, ADAS sensor interfaces, and body electronics. The "W" grade variant (e.g., AD7924W) is explicitly automotive-qualified, and AD7924BRUZ corresponds to the commercial "B" version with identical functionality and pinout - widely deployed in automotive designs where extended temperature validation is performed at system level.
AD7924BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 4
- 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:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7924BRUZ FAQ
1.How can I place an order for AD7924BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7924BRUZ 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 AD7924BRUZ reliable?
The price and inventory of AD7924BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7924BRUZ is usually 5 days.
3.What payment methods are accepted for AD7924BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7924BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7924BRUZ?
AD7924BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7924BRUZ 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 AD7924BRUZ?
For technical support, including AD7924BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7924BRUZ requirements.
6.How does Aetrix verify that AD7924BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7924BRUZ 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 AD7924BRUZ meets industry standards.
7.What is the process for return or replacement of AD7924BRUZ?
All AD7924BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7924BRUZ, 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 AD7924BRUZ part is unused and in its original packaging.
Return procedure for AD7924BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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