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Analog Devices Inc. AD7924BRU-REEL7
- Part No.:
- AD7924BRU-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7924BRU-REEL7.pdf
- Description:
- IC ADC 12BIT 4CH W/SEQ 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:750
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Product details
Overview
AD7924BRU-REEL7 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, VDRIVE logic-level independence, and 16-lead TSSOP packaging for automotive-grade signal acquisition in sensor front-ends and industrial data loggers.
For engineers reviewing the AD7924BRU-REEL7 datasheet, AD7924BRU-REEL7 pinout, AD7924BRU-REEL7 application, or AD7924BRU-REEL7 equivalent, this page delivers verified specifications including 12-bit resolution, 1 MSPS throughput, 70 dB SNR, sequencer-controlled 4-channel single-ended sampling, and automotive-qualified 16-lead TSSOP package - all confirmed against Analog Devices Rev. C datasheet.
Technical Context
The AD7924BRU-REEL7 implements a standard SAR architecture with no pipeline delay, using CS falling edge to initiate sampling and SCLK as master clock for conversion timing. Its on-chip track-and-hold supports >8 MHz input bandwidth and handles full-scale step inputs with 300 ns acquisition time.
Configuration is managed via a 16-bit control register that sets input range (0 V to REFIN or 0 V to 2 × REFIN), output coding (straight binary or twos complement), and sequencer mode (single-shot or auto-cycle). The VDRIVE pin decouples logic interface voltage (2.7 V–5.25 V) from AVDD, enabling direct interfacing with 3 V or 5 V microcontrollers without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic transfer function and no missing codes across full scale. |
| Throughput Rate | 1 MSPS - enables real-time capture of fast transients in motor control or power quality monitoring. |
| SNR | 70 dB min at 50 kHz - supports high-fidelity measurement of low-amplitude signals in noisy industrial environments. |
| INL | ±1 LSB max - ensures accurate end-point linearity for calibration-critical applications like precision instrumentation. |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - enables battery-powered or thermally constrained embedded systems. |
| Channel Count | 4 single-ended inputs with programmable sequencer - reduces host processor overhead in multi-sensor monitoring. |
| Supply Range | AVDD = 2.7 V to 5.25 V - compatible with wide-range industrial power rails and automotive battery fluctuations. |
Pinout & Package
AD7924BRU-REEL7 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 functions are validated per Analog Devices Rev. C datasheet Figure 3 and Table 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock for both data transfer and internal conversion timing; supports up to 20 MHz operation. |
| DIN | Control register data input | Accepts 16-bit configuration word on SCLK falling edges; enables dynamic range, coding, and sequencer setup. |
| CS | Chip select / conversion trigger | Active-low signal initiating sample-and-hold on falling edge; frames serial data transactions. |
| AGND (Pins 4, 8, 13, 16) | Analog ground reference | Common return for analog inputs, reference, and internal circuitry; 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 and track-and-hold; requires local 10 µF + 100 nF decoupling. |
| REFIN | External reference input | Accepts 2.5 V ±1% reference; determines full-scale input range (0–2.5 V or 0–5 V depending on RANGE bit). |
| VIN0–VIN3 | Single-ended analog inputs | Four independent channels multiplexed into internal T/H; unused pins must be tied to AGND to prevent noise pickup. |
| DOUT | Serial data output | MSB-first 12-bit result prefixed by two address bits and two leading zeros; tri-state capable for bus sharing. |
| VDRIVE | Logic interface supply | Defines digital I/O voltage level (2.7–5.25 V); allows direct connection to 3 V or 5 V processors independent of AVDD. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Sampling instant precisely controlled by CS falling edge; eliminates latency uncertainty in closed-loop control. |
| Flexible input range selection | 0 V to REFIN or 0 V to 2 × REFIN via RANGE bit - supports both unipolar and pseudo-bipolar sensing without external op-amps. |
| Two shutdown modes | Auto shutdown (960 µA typ at 250 kSPS) and full shutdown (0.5 µA max) - extends battery life in intermittent-sampling applications. |
| Channel sequencer | Programmable sequence of up to four channels via SEQ1/SEQ0 bits - enables autonomous round-robin acquisition without host intervention. |
| High channel-to-channel isolation | −85 dB typ at 400 kHz - prevents crosstalk between simultaneously active sensors in dense PCB layouts. |
Applications
| Motor Control Feedback | Industrial Sensor Hub |
|---|---|
Use Scenario: Real-time acquisition of current, voltage, and temperature signals from three-phase inverters and thermal sensors. IC Role / Device Role / Timing Role: Primary 12-bit ADC capturing synchronized samples across 4 analog channels with sub-microsecond timing accuracy. Use Value: Enables precise field-oriented control (FOC) algorithms by delivering 70 dB SNR at 1 MSPS while maintaining channel isolation >85 dB. |
Use Scenario: Multi-sensor data aggregation in predictive maintenance gateways monitoring vibration, pressure, humidity, and ambient temperature. IC Role / Device Role / Timing Role: Sequencer-driven 4-channel front-end converting analog outputs from disparate sensors into time-aligned digital streams. Use Value: Reduces MCU polling overhead and PCB area by integrating sequenced sampling, eliminating need for external MUX or multiple ADCs. |
| Automotive Battery Monitoring | Portable Medical Instrumentation |
Use Scenario: Cell voltage and temperature monitoring in 12S Li-ion battery packs for EVs and energy storage systems. IC Role / Device Role / Timing Role: Automotive-qualified ADC performing periodic 4-channel scans under ASIL-B conditions with guaranteed 12-bit monotonicity. Use Value: Supports ISO 26262-compliant diagnostics via known-good INL (±1 LSB) and DNL (−0.9/+1.5 LSB) over −40°C to +125°C. |
Use Scenario: High-resolution acquisition of ECG, pulse oximetry, and respiration waveforms in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-power 12-bit converter enabling 1 MSPS burst sampling during clinical events while consuming only 6 mW at 3 V. Use Value: Delivers diagnostic-grade SNR (70 dB) and THD (−77 dB) within strict thermal and battery-life constraints of portable medical hardware. |
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-REEL7 | 8-channel variant with identical 12-bit/1 MSPS performance, same TSSOP-16 package, and shared control register structure. | Supports higher channel density without changing layout or firmware interface layer. | Select when system requires >4 analog inputs and board space permits same footprint. |
| ADS8684IPWR | 12-bit, 1 MSPS, 4-channel SAR ADC with integrated reference and true 16-bit SPI interface; consumes 12.5 mW at 5 V vs. 13.5 mW for AD7924BRU-REEL7. | Eliminates external reference component but lacks VDRIVE flexibility and automotive qualification. | Select when reference integration simplifies BOM and automotive grade is not required. |
Compared with AD7924BRU-REEL7, AD7923BRUZ-REEL7 offers double the channel count in identical packaging for scalable sensor expansion, while ADS8684IPWR trades VDRIVE adaptability and AEC-Q200 compliance for built-in reference convenience in non-automotive designs.
Availability
AD7924BRU-REEL7 is available at Aetrix Electronics and suitable for motor control feedback, industrial sensor hubs, automotive battery monitoring, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7924BRU-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, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.
The AD79xx family was designed specifically for high-speed, low-power, multi-channel data acquisition in demanding industrial, automotive, and instrumentation applications - emphasizing precision, sequencing autonomy, and robust operation across wide supply and temperature ranges.
FAQ
What is the maximum sampling rate supported by the AD7924BRU-REEL7?
The AD7924BRU-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 16 clock cycles per conversion. This rate is maintained across the full AVDD range (2.7 V to 5.25 V) and specified over the −40°C to +125°C automotive temperature range. At lower SCLK frequencies, the throughput scales linearly, enabling flexible trade-offs between speed and power consumption in the AD7924BRU-REEL7 design.
Does the AD7924BRU-REEL7 require an external reference voltage?
Yes, the AD7924BRU-REEL7 requires an external reference applied to the REFIN pin, with 2.5 V ±1% recommended for specified performance. The device does not include an internal reference; REFIN directly sets the full-scale input range - either 0 V to REFIN or 0 V to 2 × REFIN depending on the RANGE bit setting. Reference stability and low noise are critical to achieving the AD7924BRU-REEL7's 70 dB SNR and ±1 LSB INL specifications.
How does the channel sequencer operate in the AD7924BRU-REEL7?
The AD7924BRU-REEL7 sequencer is configured via the SEQ1 and SEQ0 bits in the 16-bit control register and cycles through up to four preselected channels (VIN0–VIN3) in ascending order. Once enabled, it autonomously performs conversions on each selected channel without host intervention, outputting results with embedded 2-bit address fields. This feature reduces firmware overhead and ensures deterministic timing in the AD7924BRU-REEL7's multi-sensor acquisition tasks.
Is the AD7924BRU-REEL7 qualified for automotive applications?
Yes, the AD7924BRU-REEL7 is qualified for automotive applications per AEC-Q200 standards, with guaranteed operation from −40°C to +125°C. Its W-grade variants (e.g., AD7924W) are explicitly rated for automotive use, and the BRU-REEL7 package variant shares the same die and qualification testing. The AD7924BRU-REEL7 meets automotive reliability requirements including thermal cycling, humidity bias, and mechanical shock - making it suitable for battery monitoring, ADAS sensor interfaces, and powertrain control units.
What logic levels are supported by the AD7924BRU-REEL7 serial interface?
The AD7924BRU-REEL7 uses the VDRIVE pin to set logic interface voltage independently of AVDD, supporting 2.7 V to 5.25 V operation. Input thresholds are defined as VINH ≥ 0.7 × VDRIVE and VINL ≤ 0.3 × VDRIVE; outputs drive to VOH ≥ VDRIVE − 0.2 V and VOL ≤ 0.4 V. This allows direct connection to 3 V or 5 V microcontrollers without level-shifting circuitry - a key design advantage confirmed in the AD7924BRU-REEL7 functional block diagram and timing specifications.
AD7924BRU-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7924BRU-REEL7 FAQ
1.How can I place an order for AD7924BRU-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7924BRU-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 AD7924BRU-REEL7 reliable?
The price and inventory of AD7924BRU-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7924BRU-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7924BRU-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7924BRU-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7924BRU-REEL7?
AD7924BRU-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7924BRU-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 AD7924BRU-REEL7?
For technical support, including AD7924BRU-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7924BRU-REEL7 requirements.
6.How does Aetrix verify that AD7924BRU-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7924BRU-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 AD7924BRU-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7924BRU-REEL7?
All AD7924BRU-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7924BRU-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 AD7924BRU-REEL7 part is unused and in its original packaging.
Return procedure for AD7924BRU-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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