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Analog Devices Inc. AD7924BRUZ-REEL
- Part No.:
- AD7924BRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7924BRUZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,004
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Product details
Overview
AD7924BRUZ-REEL 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 four single-ended analog inputs (VIN0–VIN3), SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and 0.5 µA full shutdown current. It is used in high-speed sensor data acquisition systems requiring precise multi-channel sampling without pipeline delay.
For engineers reviewing the AD7924BRUZ-REEL datasheet, AD7924BRUZ-REEL pinout, AD7924BRUZ-REEL application, or AD7924BRUZ-REEL equivalent, key selection criteria include its 12-bit resolution with ±1 LSB INL, 1 MSPS throughput with no pipeline latency, sequencer-controlled channel cycling, VDRIVE-independent logic interface, and automotive-qualified 16-lead TSSOP package.
Technical Context
The AD7924BRUZ-REEL implements a standard successive approximation register (SAR) architecture with a 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 internal clock generator or PLL is used.
Its sequencer operates via control register bits SEQ1/SEQ0 and ADD1/ADD0 to predefine channel scan order across VIN0–VIN3. Input range selection (0 V to REFIN or 0 V to 2 × REFIN) and output coding (straight binary or twos complement) are software-configurable, with REFIN fixed at 2.5 V ±1% for specified performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes with guaranteed no missing codes. |
| Throughput Rate | 1 MSPS maximum - supports real-time sampling of fast-changing sensor signals. |
| SNR | 70 dB minimum at 50 kHz - enables accurate digitization of medium-bandwidth analog signals. |
| INL | ±1 LSB maximum - ensures monotonicity and linearity critical for closed-loop control feedback. |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - allows integration into power-constrained industrial or automotive modules. |
| Shutdown Current | 0.5 µA maximum - supports ultra-low-power sleep modes in battery-backed systems. |
| Input Bandwidth | 8.2 MHz @ −3 dB - accommodates anti-aliasing filter design for signals up to ~1.3 MHz. |
Pinout & Package
AD7924BRUZ-REEL 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 conversion timing; no separate conversion clock required. |
| DIN | Control register data input | Accepts configuration bits (SEQ1/SEQ0, RANGE, CODING) on falling SCLK edge. |
| CS | Chip select / conversion trigger | Falling edge initiates sampling; frames all serial communication. |
| AGND (Pins 4, 8, 13, 16) | Analog ground reference | All analog inputs (VIN0–VIN3), REFIN, and AVDD return must tie to this low-noise node. |
| AVDD (Pins 5, 6) | Analog power supply | Single 2.7 V–5.25 V rail powers analog core; 4.75 V–5.25 V required for 0 V to 2×REFIN mode. |
| REFIN | External reference input | 2.5 V ±1% precision reference sets full-scale range; impedance 36 kΩ typical. |
| VIN0–VIN3 (Pins 9–12) | Single-ended analog inputs | Four independent channels; sequenced automatically or selected individually via control register. |
| DOUT | Serial data output | MSB-first 12-bit result + 2-bit channel ID; outputs only during active CS window. |
| VDRIVE | Digital I/O voltage reference | Decouples logic interface level (3 V or 5 V) from AVDD, enabling mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Sampling instant precisely controlled by CS falling edge; conversion completes in fixed 16-SCLK cycles - essential for deterministic timing in real-time control loops. |
| Configurable input range | Software-selectable 0 V to REFIN or 0 V to 2 × REFIN via RANGE bit - supports both unipolar and bipolar-referenced signal conditioning without external op-amps. |
| Channel sequencer | Hardware-accelerated scan of up to four channels using SEQ1/SEQ0 bits - eliminates MCU overhead for round-robin acquisition in multi-sensor monitoring. |
| VDRIVE logic independence | Serial interface operates at VDRIVE voltage (2.7 V–5.25 V), independent of AVDD - simplifies connection to 3 V microcontrollers even when AVDD = 5 V. |
| Automotive qualification | Qualified per AEC-Q100 Grade 3 (−40°C to +125°C) - suitable for under-hood engine control, battery management, and ADAS sensor front-ends. |
Applications
| Motor Control Feedback | Industrial Sensor Hub |
|---|---|
Use Scenario: Real-time acquisition of current sense, position encoder, and temperature signals in servo drives. IC Role / Device Role / Timing Role: Simultaneous 4-channel sampling with sequencer enables synchronized capture of motor phase currents and rotor position within one control cycle. Use Value: 1 MSPS throughput and no pipeline delay ensure sub-microsecond timing alignment between sampled variables - critical for field-oriented control accuracy. |
Use Scenario: Centralized analog monitoring of pressure, vibration, humidity, and ambient temperature in predictive maintenance gateways. IC Role / Device Role / Timing Role: ADC front-end converting multiple sensor outputs to digital for edge processing or cloud upload. Use Value: 12-bit resolution and 70 dB SNR preserve dynamic range across sensor types; low 6 mW power enables always-on operation in sealed enclosures. |
| Automotive Battery Monitoring | Medical Diagnostic Instrumentation |
Use Scenario: Cell voltage and temperature sampling in high-voltage EV battery packs with isolation barriers. IC Role / Device Role / Timing Role: Isolated-side ADC acquiring up to four cell voltages per module with precise sequencing and timing. Use Value: Automotive qualification and 0.5 µA shutdown current support safety-critical fail-safe states and long-term storage without battery drain. |
Use Scenario: Multi-parameter physiological signal digitization (ECG lead voltages, respiration, skin conductance) in portable diagnostics. IC Role / Device Role / Timing Role: Low-noise, multi-channel front-end capturing correlated biopotential waveforms with minimal inter-channel crosstalk. Use Value: −85 dB channel-to-channel isolation and 50 ps aperture jitter preserve waveform fidelity for clinical-grade analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7923BRUZ-REEL | 4-channel, 12-bit, but lacks sequencer; requires external channel selection logic or MCU-driven MUX control. | Higher software overhead for multi-channel acquisition; unsuitable for autonomous scan sequences. | Select AD7923BRUZ-REEL only if sequencer functionality is unnecessary and board space permits external MUX. |
| ADS8684IPWR | 4-channel, 12-bit, SAR ADC with integrated reference and programmable input ranges (±10 V, ±5 V, 0–10 V); no VDRIVE pin. | Eliminates external REFIN but ties logic interface to AVDD; not automotive-qualified. | Choose ADS8684IPWR for simplified BOM in non-automotive industrial PLCs where reference integration outweighs VDRIVE flexibility. |
Compared with AD7924BRUZ-REEL, AD7923BRUZ-REEL requires additional sequencing logic and increases firmware complexity, while ADS8684IPWR trades VDRIVE decoupling and AEC-Q100 compliance for built-in reference convenience - making AD7924BRUZ-REEL optimal for automotive and mixed-voltage embedded systems demanding autonomous channel cycling.
Availability
AD7924BRUZ-REEL is available at Aetrix Electronics and suitable for motor control feedback, industrial sensor hubs, automotive battery monitoring, and medical diagnostic instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7924BRUZ-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 was designed specifically for high-speed, low-power, multi-channel data acquisition in space- and power-constrained embedded systems - emphasizing sequencer autonomy, flexible voltage operation, and automotive reliability.
FAQ
What is the maximum sample rate of the AD7924BRUZ-REEL?
The AD7924BRUZ-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. The AD7924BRUZ-REEL maintains this performance while consuming only 6 mW at 3 V.
Does the AD7924BRUZ-REEL require an external reference voltage?
Yes, the AD7924BRUZ-REEL requires an external precision reference applied to the REFIN pin. For specified performance, REFIN must be 2.5 V ±1%, with typical input impedance of 36 kΩ at 1 MSPS. The device does not include an internal reference; using an inaccurate or noisy reference directly degrades SNR and INL. The AD7924BRUZ-REEL supports two input ranges (0 V to REFIN or 0 V to 2 × REFIN) depending on the RANGE bit setting.
How does the channel sequencer work on the AD7924BRUZ-REEL?
The AD7924BRUZ-REEL sequencer uses SEQ1/SEQ0 bits in the control register to define a fixed scan pattern across VIN0–VIN3: 00 = single channel (selected by ADD1/ADD0), 01 = VIN0→VIN1→VIN2→VIN3, 10 = VIN0→VIN2→VIN1→VIN3, 11 = VIN0→VIN1→VIN2→VIN3→VIN0 (wraparound). Sequencing occurs autonomously after CS assertion - no host intervention is needed between conversions. The AD7924BRUZ-REEL outputs channel ID bits alongside each 12-bit result on DOUT.
Is the AD7924BRUZ-REEL compatible with 3 V microcontrollers?
Yes, the AD7924BRUZ-REEL supports 3 V microcontrollers via its VDRIVE pin: connecting VDRIVE to 3 V configures all digital I/O (CS, SCLK, DIN, DOUT) for 3 V logic levels, regardless of AVDD voltage (which may be 5 V for wider input range). Input thresholds are 0.3×VDRIVE (low) and 0.7×VDRIVE (high); output drive strength meets 200 µA sink/source specs at 3 V. This eliminates level-shifting components in mixed-supply systems.
What packaging and environmental qualifications apply to the AD7924BRUZ-REEL?
The AD7924BRUZ-REEL is supplied in a 16-lead TSSOP package (RU-16) with exposed thermal pad, rated for −40°C to +125°C operation and qualified to AEC-Q100 Grade 3. It features θJA = 150.4°C/W and supports reflow soldering per JEDEC J-STD-020. The "REEL" suffix indicates tape-and-reel packaging for automated assembly. All AGND pins must be tied to a low-impedance analog ground plane to maintain 70 dB SNR performance.
AD7924BRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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:
- 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-REEL FAQ
1.How can I place an order for AD7924BRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7924BRUZ-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 AD7924BRUZ-REEL reliable?
The price and inventory of AD7924BRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7924BRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7924BRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7924BRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7924BRUZ-REEL?
AD7924BRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7924BRUZ-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 AD7924BRUZ-REEL?
For technical support, including AD7924BRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7924BRUZ-REEL requirements.
6.How does Aetrix verify that AD7924BRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7924BRUZ-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 AD7924BRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7924BRUZ-REEL?
All AD7924BRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7924BRUZ-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 AD7924BRUZ-REEL part is unused and in its original packaging.
Return procedure for AD7924BRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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