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Analog Devices Inc. AD7924BRUZ-REEL7
- Part No.:
- AD7924BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7924BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:404
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Product details
Overview
AD7924BRUZ-REEL7 from Analog Devices is a 12-bit, 4-channel, single-supply successive approximation ADC with integrated sequencer, 1 MSPS throughput, 70 dB SNR at 50 kHz, and 16-lead TSSOP package. It operates from 2.7 V to 5.25 V, supports flexible input ranges (0 V to REFIN or 0 V to 2 × REFIN), and targets precision data acquisition in industrial sensor interfaces and motor control feedback loops.
For engineers reviewing the AD7924BRUZ-REEL7 datasheet, AD7924BRUZ-REEL7 pinout, AD7924BRUZ-REEL7 application, or AD7924BRUZ-REEL7 equivalent, key selection criteria include guaranteed no-missed-codes performance, channel-to-channel isolation of −85 dB at 400 kHz, aperture jitter of 50 ps typ, and SPI/QSPI/MICROWIRE/DSP-compatible serial interface timing compliance up to 20 MHz.
Technical Context
The AD7924BRUZ-REEL7 implements a standard SAR architecture with on-chip track-and-hold amplifier capable of >8 MHz full-power bandwidth. Conversion is initiated on the falling edge of CS, with no pipeline delay and deterministic 16-SCLK-cycle conversion time (800 ns max at 20 MHz).
It features a programmable sequencer controlled via ADD1/ADD0 and SEQ1/SEQ0 bits in the control register, enabling preconfigured channel cycling 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 configured via RANGE and CODING bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 distinct digital codes with guaranteed no-missed-codes performance. |
| Throughput Rate | 1 MSPS - supports real-time sampling of fast transients in closed-loop control systems. |
| SNR | 70 dB min at 50 kHz - enables high-fidelity digitization of low-amplitude signals in noisy environments. |
| INL | ±1 LSB max - ensures monotonicity and linearity critical for closed-loop position/speed feedback. |
| Channel Isolation | −85 dB typ at 400 kHz - minimizes crosstalk between multiplexed sensor inputs (e.g., phase currents). |
| Aperture Jitter | 50 ps typ - limits sampling uncertainty to <0.01% of 1 MSPS period, preserving dynamic accuracy. |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - enables thermally constrained designs in compact industrial modules. |
Pinout & Package
AD7924BRUZ-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 1 is SCLK; pins 4, 8, 13, and 16 are AGND; pins 5 and 6 are AVDD; pin 15 is VDRIVE; and analog inputs occupy pins 9–12 (VIN0–VIN3).
| 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 configuration bits (RANGE, CODING, SEQ1/SEQ0, ADD1/ADD0) on falling SCLK edge. |
| CS | Chip select / conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial data transactions. |
| REFIN | External reference input | Accepts 2.5 V ±1% reference; sets full-scale range for all four channels simultaneously. |
| VIN0–VIN3 | Analog input channels | Four single-ended inputs; sequenced automatically or selected individually via control register. |
| DOUT | Serial data output | Outputs 12-bit result MSB-first with 2 leading address bits and no trailing zeros (per datasheet Figure 3). |
| VDRIVE | Logic I/O supply | Decouples serial interface voltage (3 V or 5 V) from AVDD, enabling direct interfacing to mixed-voltage processors. |
Key Features
| Feature | Design Value |
|---|---|
| Four single-ended inputs with hardware sequencer | Enables autonomous cyclic conversion of up to four sensors without host CPU intervention, reducing firmware overhead. |
| No pipeline delay | Guarantees deterministic latency: sampling occurs precisely on CS falling edge, and result is available after fixed 16-SCLK cycles. |
| VDRIVE logic supply independence | Allows DOUT/DIN/CS/SCLK I/O to operate at 3 V while AVDD runs at 5 V (or vice versa), simplifying level-shifting in mixed-voltage systems. |
| Flexible input range selection | Supports 0 V to REFIN (unipolar) or 0 V to 2 × REFIN (extended unipolar) via RANGE bit, accommodating diverse sensor output spans. |
| Two shutdown modes | Auto shutdown (960 µA typ at 250 kSPS) and full shutdown (0.5 µA max) enable dynamic power scaling in battery-powered or intermittent-scan applications. |
Applications
| Industrial Motor Control | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: Real-time sampling of three-phase current and DC bus voltage in inverter drives. IC Role / Device Role / Timing Role: Simultaneous sequencing across VIN0–VIN3 captures synchronized snapshots of motor phase currents and bus voltage for field-oriented control (FOC) algorithms. Use Value: 70 dB SNR and −85 dB channel isolation preserve signal integrity across high-dV/dt switching noise, enabling accurate torque estimation. |
Use Scenario: Monitoring individual cell voltages and pack temperature in 12S Li-ion battery packs. IC Role / Device Role / Timing Role: Cyclic conversion of four cell taps (VIN0–VIN3) with auto-sequencing reduces MCU polling load and ensures consistent sampling intervals. Use Value: Guaranteed no-missed-codes and ±1 LSB INL ensure precise state-of-charge calculation without calibration drift over temperature. |
| Programmable Logic Controller (PLC) Analog Input Module | Medical Patient Monitor Signal Chain |
|
Use Scenario: Digitizing 4× 4–20 mA loop outputs or thermocouple signals in modular I/O cards. IC Role / Device Role / Timing Role: Acts as front-end ADC with external precision reference (REFIN) and configurable input range to match varied sensor signal conditioning stages. Use Value: 1 MSPS throughput allows oversampling for noise reduction, while 12-bit resolution meets IEC 61000-4-5 surge immunity requirements for industrial EMC. |
Use Scenario: Acquiring ECG, respiration, and SpO₂ analog waveforms in portable patient monitors. IC Role / Device Role / Timing Role: Provides low-noise, low-power digitization path with minimal aperture jitter to preserve waveform fidelity for arrhythmia detection algorithms. Use Value: 50 ps aperture jitter and 70 dB SNR at 50 kHz meet AAMI EC11 clinical accuracy thresholds for diagnostic-grade biosignal capture. |
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 |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, 1 MSPS, SPI interface; requires external reference; no VDRIVE pin. | Higher channel count but larger 32-pin QFN package; lacks independent logic supply for mixed-voltage interfacing. | Choose ADS7953IRHBT when expanding beyond 4 channels is required and board space permits larger footprint. |
| MAX11312ETI+ | 12-bit, 8-channel, 1 MSPS, SPI interface; integrated reference; VDDIO pin for I/O voltage flexibility. | Includes internal 2.048 V reference; smaller 24-pin TQFN; lower SNR (67 dB) and higher power (10 mW at 3 V). | Choose MAX11312ETI+ when reference integration and reduced BOM count outweigh SNR and power trade-offs. |
Compared with ADS7953IRHBT and MAX11312ETI+, AD7924BRUZ-REEL7 offers superior SNR (70 dB vs. ≤67 dB), lower operational power (6 mW vs. ≥10 mW), and unique VDRIVE functionality for seamless 3 V/5 V processor interfacing-making it optimal for space-constrained, noise-sensitive industrial and automotive data acquisition.
Availability
AD7924BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial motor control, automotive battery monitoring, PLC analog input modules, and portable medical device design requiring stable component supply and long-term production continuity.
Supply support for AD7924BRUZ-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 infrastructure spanning North America, Europe, and Asia.
The AD79xx family-including AD7924BRUZ-REEL7-is designed specifically for high-speed, low-power, multi-channel data acquisition in industrial automation, automotive electrification, and precision instrumentation where deterministic timing and noise resilience are critical.
FAQ
What is the maximum sampling rate supported by the AD7924BRUZ-REEL7?
The AD7924BRUZ-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz serial clock (SCLK) and 16 SCLK cycles per conversion. At lower SCLK frequencies, the throughput scales linearly-for example, 10 MHz SCLK yields 500 kSPS. This fixed 16-cycle timing ensures predictable latency for real-time control loops.
Does the AD7924BRUZ-REEL7 require an external reference voltage?
Yes, the AD7924BRUZ-REEL7 requires an external reference applied to the REFIN pin. The datasheet specifies 2.5 V ±1% for guaranteed performance. The device does not include an internal reference; using a precision external reference (e.g., ADR4525) ensures full 12-bit accuracy and stability over temperature and time.
How does the sequencer function in the AD7924BRUZ-REEL7 work?
The AD7924BRUZ-REEL7 sequencer is programmed via SEQ1/SEQ0 and ADD1/ADD0 bits in the control register. It supports four modes: single-channel repeat, two-channel toggle, three-channel cycle, and full four-channel sequence. Once configured, the sequencer autonomously cycles through enabled channels without host intervention, reducing software overhead in continuous acquisition systems.
Can the AD7924BRUZ-REEL7 operate with different supply voltages for analog and digital I/O sections?
Yes-the AD7924BRUZ-REEL7 uses separate AVDD (2.7 V to 5.25 V) and VDRIVE (2.7 V to 5.25 V) supplies. VDRIVE sets logic levels for SCLK, DIN, DOUT, and CS, allowing direct connection to 3 V or 5 V microcontrollers regardless of AVDD voltage. This eliminates external level shifters in mixed-voltage system designs.
What is the significance of the "BRUZ-REEL7" suffix in AD7924BRUZ-REEL7?
The "BRUZ-REEL7" suffix indicates a 16-lead TSSOP package (RUZ), tape-and-reel packaging (REEL), and compliance with RoHS and lead-free standards (Z). The "B" denotes the commercial temperature grade (−40°C to +85°C), and "REEL7" specifies a 1,000-unit reel size per JEDEC standard J-STD-020.
AD7924BRUZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD7924BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7924BRUZ-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 AD7924BRUZ-REEL7 reliable?
The price and inventory of AD7924BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7924BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7924BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7924BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7924BRUZ-REEL7?
AD7924BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7924BRUZ-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 AD7924BRUZ-REEL7?
For technical support, including AD7924BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7924BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7924BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7924BRUZ-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 AD7924BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7924BRUZ-REEL7?
All AD7924BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7924BRUZ-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 AD7924BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7924BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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