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Analog Devices Inc. AD7923BRUZ-REEL7
- Part No.:
- AD7923BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7923BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,779
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Product details
Overview
AD7923BRUZ-REEL7 from Analog Devices is a 12-bit, 4-channel, successive approximation register (SAR) analog-to-digital converter with integrated channel sequencer, operating at up to 200 kSPS with 3 V or 5 V single-supply power, 70 dB minimum SNR at 50 kHz input, and 16-lead TSSOP package. It serves as a high-accuracy front-end digitizer in sensor signal chains for industrial process control and automotive battery monitoring systems.
For engineers reviewing the AD7923BRUZ-REEL7 datasheet, AD7923BRUZ-REEL7 pinout, AD7923BRUZ-REEL7 application, or AD7923BRUZ-REEL7 equivalent, key selection criteria include sequenced single-ended input support, VDRIVE logic-level independence, no pipeline delay, 0.5 μA shutdown current, and automotive-grade qualification (−40°C to +125°C).
Technical Context
The AD7923BRUZ-REEL7 employs a track-and-hold amplifier with 8.2 MHz full-power bandwidth and aperture jitter of 50 ps typ, enabling accurate sampling of fast-changing sensor signals. Its conversion timing is fully synchronized to the external SCLK, with minimum conversion time of 800 ns at 20 MHz SCLK and no pipeline latency.
It features a programmable control register that configures input range (0 V to REFIN or 0 V to 2 × REFIN), output coding (straight binary or twos complement), power mode (normal, auto shutdown, full shutdown), and sequencer behavior (single-shot or continuous channel cycling). The VDRIVE pin decouples logic interface voltage (2.7 V–5.25 V) from AVDD, allowing direct interfacing with 3 V or 5 V microcontrollers without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale for precise sensor quantization |
| Throughput Rate | 200 kSPS max - supports real-time sampling of motor current, temperature, or pressure waveforms |
| SNR | 70 dB min at 50 kHz - ensures ≥11.3 effective bits for clean signal capture in noisy environments |
| INL | ±1 LSB max - guarantees monotonicity and <0.025% end-point linearity error across full scale |
| Power Dissipation | 3.6 mW max at 3 V / 200 kSPS - enables low-heat operation in space-constrained modules |
| Shutdown Current | 0.5 μA max - allows ultra-low-power sleep states in battery-powered data loggers |
| Input Channels | 4 single-ended with hardware sequencer - eliminates software polling overhead for multi-sensor reads |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions |
Pinout & Package
AD7923BRUZ-REEL7 is housed in a 16-lead TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal performance. All AGND pins (4, 8, 13, 16) must be tied together and connected to a low-impedance analog ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock for both data transfer and internal SAR conversion timing; supports up to 20 MHz |
| DIN | Data input | Loads 12-bit control register on falling edge; enables dynamic reconfiguration between conversions |
| CS | Active-low chip select | Initiates conversion on falling edge and frames SPI-compatible serial data frame |
| AGND (×4) | Analog ground reference | Common return for all analog circuitry; critical for noise rejection and DC accuracy |
| AVDD (×2) | Analog power supply | 2.7 V–5.25 V single supply; must be decoupled locally with 10 µF + 100 nF capacitors |
| REFIN | External reference input | 2.5 V ±1% reference required; sets full-scale range and directly impacts gain error |
| VIN0–VIN3 | Analog input channels | Four single-ended inputs; selected via ADD1/ADD0 bits; unused channels must be grounded |
| DOUT | Serial data output | MSB-first stream: two leading zeros + two address bits + 12-bit result; SPI/QSPI/MICROWIRE compatible |
| VDRIVE | Logic interface supply | Defines logic threshold (0.3×/0.7×VDRIVE); independent of AVDD for mixed-voltage system interfacing |
Key Features
| Feature | Design Value |
|---|---|
| Hardware channel sequencer | Enables automatic round-robin conversion across VIN0–VIN3 without CPU intervention or firmware overhead |
| VDRIVE voltage independence | Allows direct connection to 3 V or 5 V host processors while AVDD operates at different voltage (e.g., 3.3 V AVDD + 5 V MCU I/O) |
| No pipeline delay | Guarantees deterministic, one-shot conversion per CS assertion-critical for time-triggered control loops |
| Flexible input range selection | 0 V to REFIN (2.5 V) or 0 V to 2 × REFIN (5.0 V) configured via RANGE bit; supports both unipolar sensor outputs and differential-biased signals |
| Automotive qualification | AEC-Q100 stress-tested and rated for −40°C to +125°C operation-suitable for engine control, battery management, and ADAS subsystems |
| Low acquisition time | 300 ns max track-and-hold acquisition enables accurate sampling of fast transients (e.g., overcurrent events) |
Applications
| Industrial Process Monitoring | Automotive Battery Management |
|---|---|
|
Use Scenario: Continuous acquisition of temperature, pressure, and flow sensor outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Front-end SAR ADC with sequenced 4-channel sampling synchronizes to deterministic scan cycles in real-time control firmware. Use Value: Eliminates need for external multiplexer and timing logic; 70 dB SNR preserves resolution across 4–20 mA loop-referred signals. |
Use Scenario: Cell voltage and pack current monitoring in 12 V–48 V EV/HEV battery packs with thermal sensors per module. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC capturing multiple cell voltages during active charge/discharge phases. Use Value: ±1 LSB INL and −40°C to +125°C rating ensure consistent SoC estimation across vehicle lifetime and environmental extremes. |
| Motor Drive Current Sensing | Medical Patient Monitoring |
|
Use Scenario: Isolated shunt-based phase current measurement in three-phase inverter drives with thermal feedback. IC Role / Device Role / Timing Role: Simultaneous sampling of current and temperature channels using hardware sequencer for cycle-synchronized diagnostics. Use Value: 8.2 MHz full-power bandwidth captures PWM-edge-induced transients; 50 ps aperture jitter minimizes current reconstruction error. |
Use Scenario: Multi-parameter acquisition (ECG lead voltage, SpO₂ photodiode current, temperature) in portable patient monitors. IC Role / Device Role / Timing Role: Low-power, high-SNR ADC enabling extended battery life while maintaining clinical-grade signal fidelity. Use Value: 3.6 mW at 3 V / 200 kSPS and 0.5 μA shutdown reduce thermal load and extend runtime; 70 dB SNR meets IEC 60601-2-27 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7914BRUZ | Same 4-channel 12-bit SAR architecture but lacks VDRIVE pin; logic interface tied to AVDD only. | Requires level-shifting when interfacing with 3 V MCU and 5 V AVDD; unsuitable for mixed-voltage designs. | Select AD7914BRUZ only if VDRIVE independence is unnecessary and cost is primary constraint. |
| ADS7953IRHBT | Texas Instruments part: 12-bit, 16-channel, 1 MSPS, but higher power (12 mW at 1 MSPS) and no automotive qualification. | Higher channel count and speed, but wider temperature range and lower reliability in automotive environments. | Choose ADS7953IRHBT for non-automotive high-channel-count systems where throughput >200 kSPS is required. |
Compared with AD7923BRUZ-REEL7, AD7914BRUZ sacrifices interface flexibility for lower cost, while ADS7953IRHBT trades automotive qualification and ultra-low shutdown current for raw speed and channel density-making AD7923BRUZ-REEL7 optimal for thermally constrained, safety-critical, mixed-voltage embedded sensing.
Availability
AD7923BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial process control, automotive battery monitoring, and medical patient monitoring systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for AD7923BRUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7923BRUZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for high-accuracy, low-power, multi-channel data acquisition in harsh industrial and automotive environments.
FAQ
What is the maximum sampling rate supported by the AD7923BRUZ-REEL7?
The AD7923BRUZ-REEL7 supports a maximum throughput rate of 200 kSPS, achieved with a 20 MHz serial clock (SCLK). Conversion time is fixed at 16 SCLK cycles, so the actual sample rate scales linearly with SCLK frequency-e.g., 100 kSPS at 10 MHz SCLK. This rate is guaranteed across the full −40°C to +125°C temperature range and 2.7 V–5.25 V AVDD supply.
Does the AD7923BRUZ-REEL7 require an external reference voltage?
Yes, the AD7923BRUZ-REEL7 requires an external reference voltage applied to the REFIN pin. For specified performance, REFIN must be 2.5 V ±1%. The device supports two input ranges: 0 V to REFIN (selected via RANGE = 1) or 0 V to 2 × REFIN (RANGE = 0, AVDD ≥ 4.75 V). No internal reference is provided; reference stability directly impacts gain error and SNR.
How does the channel sequencer function in the AD7923BRUZ-REEL7?
The AD7923BRUZ-REEL7 sequencer is controlled by SEQ1 and SEQ0 bits in the 12-bit control register. When configured for continuous sequence (SEQ1=1, SEQ0=1), it automatically cycles through VIN0 → VIN1 → VIN2 → VIN3 → VIN0 repeatedly, with each conversion triggered by CS. Channel address bits (ADD1/ADD0) define the final channel in the sequence. This eliminates firmware polling and reduces host processor load in multi-sensor systems.
Can the AD7923BRUZ-REEL7 interface directly with a 3.3 V microcontroller while powered from a 5 V AVDD supply?
Yes-the VDRIVE pin enables this exact configuration. Set VDRIVE = 3.3 V to match the microcontroller's I/O voltage, while AVDD = 5 V supplies the analog core. Logic thresholds (VINH/VINL) scale to 0.7×/0.3×VDRIVE, ensuring reliable communication. This separation prevents noise coupling from digital switching into the analog supply and simplifies PCB layout in mixed-voltage systems.
What is the significance of the 0.5 μA shutdown current specification for the AD7923BRUZ-REEL7?
The 0.5 μA maximum shutdown current (at −40°C to +125°C) enables ultra-low-power operation in battery-backed or energy-harvesting systems. In full shutdown mode (PM1=1, PM0=0), all internal circuitry powers down except the control register, allowing instant wake-up (<1 µs) upon mode change. This spec supports >10-year shelf life in data loggers and extends operational runtime in portable diagnostic equipment using AD7923BRUZ-REEL7.
AD7923BRUZ-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):
- 200k
- 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 ~ 125°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7923BRUZ-REEL7 FAQ
1.How can I place an order for AD7923BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7923BRUZ-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 AD7923BRUZ-REEL7 reliable?
The price and inventory of AD7923BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7923BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7923BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7923BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7923BRUZ-REEL7?
AD7923BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7923BRUZ-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 AD7923BRUZ-REEL7?
For technical support, including AD7923BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7923BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7923BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7923BRUZ-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 AD7923BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7923BRUZ-REEL7?
All AD7923BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7923BRUZ-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 AD7923BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7923BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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