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Analog Devices Inc. AD7490BRUZ
- Part No.:
- AD7490BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7490BRUZ.pdf
- Description:
- IC ADC 12BIT SAR 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:705
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Product details
Overview
AD7490BRUZ from Analog Devices is a 12-bit, 16-channel, successive approximation ADC with integrated channel sequencer, operating at up to 1 MSPS throughput on a single 2.7 V to 5.25 V supply. It delivers 69.5 dB SNR at 50 kHz input frequency, supports flexible 0 V to REFIN or 0 V to 2 × REFIN input ranges, and features SPI/QSPI/MICROWIRE/DSP-compatible serial interface. It is used in multichannel system monitoring and power line monitoring applications requiring high channel density and low power.
For engineers reviewing the AD7490BRUZ datasheet, AD7490BRUZ pinout, AD7490BRUZ application, or AD7490BRUZ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed automotive-grade alternatives, and supply-chain support details specific to the BRUZ variant (28-lead TSSOP, −40°C to +85°C).
Technical Context
The AD7490BRUZ implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and 50 ps aperture jitter, enabling accurate sampling of signals beyond 1 MHz. Its conversion is initiated on the falling edge of CS and clocked entirely by SCLK - no pipeline delay, no latency between sample and result.
It uses a 16-cycle SCLK-per-conversion timing model: at 20 MHz SCLK, conversion time is fixed at 800 ns, enabling deterministic 1 MSPS throughput. The sequencer allows preprogrammed cycling across up to 16 single-ended inputs, controlled via ADD3–ADD0 bits in the control register, with channel-to-channel isolation of −82 dB at 400 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise analog signal digitization. |
| Throughput Rate | 1 MSPS - supports real-time capture of fast transients in power monitoring and industrial control loops. |
| Input Channels | 16 single-ended - eliminates external multiplexer need in compact multichannel data loggers. |
| SNR @ 50 kHz | 69.5 dB - enables ≥11.3 effective bits for clean measurement of 50/60 Hz harmonics in energy meters. |
| Supply Range | 2.7 V to 5.25 V - interoperates with both 3.3 V and 5 V microcontrollers without level shifters. |
| VDRIVE Pin | Independent logic voltage - allows direct interfacing to 3 V or 5 V host processors regardless of VDD setting. |
| Full Shutdown Current | 0.5 µA - extends battery life in portable instrumentation during idle periods. |
Pinout & Package
AD7490BRUZ is packaged in a 28-lead TSSOP (ROHS-compliant, lead-free, moisture sensitivity level 3). All NC pins must be connected directly to AGND per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 20) | Chip Select | Active-low conversion trigger and serial frame sync - falling edge initiates sampling and conversion simultaneously. |
| DIN (Pin 19) | Data Input | Accepts 16-bit control register writes (address + config bits) on SCLK falling edges for sequencer setup. |
| DOUT (Pin 15) | Data Output | Serial stream outputs 4-bit channel address followed by 12-bit conversion result, MSB-first, with programmable coding. |
| SCLK (Pin 16) | Serial Clock | Master clock for both interface and internal conversion - 20 MHz max enables 1 MSPS deterministic timing. |
| VIN0–VIN15 (Pins 13–5, 3–1, 28–25) | Analog Inputs | 16 single-ended channels multiplexed into one SAR core; unused channels must tie to AGND to prevent noise coupling. |
| REFIN (Pin 23) | Reference Input | Accepts 2.5 V ±1% external reference - sets full-scale range for both 0–REFIN and 0–2×REFIN modes. |
| VDRIVE (Pin 17) | Logic Supply | Defines I/O voltage level (3 V or 5 V) independently of VDD - enables mixed-voltage system integration. |
| AGND (Pins 14, 21, 24) | Analog Ground | Common reference for all analog signals and REFIN; must be star-connected to minimize ground bounce in multichannel operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 16-channel sequencer | Reduces host processor overhead by automating round-robin conversions across preselected inputs without software polling. |
| No pipeline delay | Enables true sample-and-hold timing control - critical for synchronized multi-sensor acquisition in motor control feedback loops. |
| VDRIVE pin independence | Eliminates level-shifter components when interfacing to 3 V FPGAs or 5 V DSPs while VDD powers analog circuitry at optimal voltage. |
| Channel-to-channel isolation | −82 dB at 400 kHz prevents crosstalk-induced errors in simultaneous high-frequency measurements across adjacent inputs. |
| AEC-Q100 qualified | Validated for automotive under-hood applications including battery management and engine control unit sensor interfaces. |
Applications
| Power Line Monitoring | Battery-Powered Data Logger |
|---|---|
Use Scenario: Real-time acquisition of voltage, current, and harmonic content across 3-phase AC lines in smart meters and grid-edge inverters. IC Role / Device Role / Timing Role: 16-channel SAR ADC with sequencer performs synchronized sampling of phase voltages and neutral currents at 1 MSPS for FFT-based power quality analysis. Use Value: 69.5 dB SNR ensures accurate 50/60 Hz fundamental and 25th harmonic detection; 12-bit resolution meets IEC 62053-22 Class 0.5 accuracy requirements. |
Use Scenario: Portable environmental sensor node measuring temperature, humidity, and gas concentration over extended field deployments. IC Role / Device Role / Timing Role: Low-power 12-bit ADC digitizes multiple analog sensors sequentially using built-in sequencer, minimizing active time per measurement cycle. Use Value: 0.5 µA full shutdown current extends coin-cell battery life to >5 years; 3 V operation aligns with common Li-ion/Li-SOCl₂ supply rails. |
| Multichannel Industrial Control | Automotive Battery Management System |
Use Scenario: Closed-loop feedback acquisition in PLC analog I/O modules handling 8–16 sensor inputs (e.g., pressure, flow, position). IC Role / Device Role / Timing Role: Single-chip 16-input ADC replaces discrete mux + ADC solutions, reducing BOM count and PCB area in DIN-rail mounted controllers. Use Value: −82 dB channel isolation prevents cross-talk between high-gain current shunt measurements and low-level thermocouple inputs sharing same substrate. |
Use Scenario: Cell voltage and temperature monitoring in 12S–16S EV battery packs where space, reliability, and thermal robustness are critical. IC Role / Device Role / Timing Role: AEC-Q100 qualified ADC acquires cell voltages in sequence with <800 ns conversion time, supporting ISO 26262 ASIL-B diagnostic coverage. Use Value: −40°C to +125°C operating range covers under-hood thermal extremes; 28-lead TSSOP allows compact layout with minimal thermal resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7492BRUZ | 8-channel, 12-bit, 1 MSPS - lacks sequencer; requires external channel selection logic. | Suitable only for ≤8 input systems; increases firmware complexity and board area for 16-channel designs. | Select AD7490BRUZ when >8 channels or autonomous sequencing is required - avoids added mux IC and control overhead. |
| ADS8688IPWR | 8-channel, 16-bit, 1 MSPS - higher resolution but lower channel count and no native sequencer; requires external GPIO control. | Better for precision measurement (e.g., strain gauge bridges), not high-channel-count monitoring where 12-bit suffices. | Choose AD7490BRUZ for cost-sensitive, space-constrained 16-channel systems needing deterministic timing and minimal host intervention. |
Compared with AD7492BRUZ and ADS8688IPWR, the AD7490BRUZ uniquely combines 16 single-ended inputs, hardware sequencer, and 1 MSPS throughput in a single TSSOP package - eliminating external muxes, reducing firmware load, and lowering total system BOM cost for multichannel monitoring.
Availability
AD7490BRUZ is available at Aetrix Electronics and suitable for power line monitoring, battery-powered instrumentation, and multichannel industrial control systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for AD7490BRUZ 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.
The AD7490 is part of Analog Devices' precision data acquisition portfolio, engineered for high-channel-density, low-power, and automotive-qualified applications where deterministic timing and noise immunity are critical.
FAQ
What is the maximum sample rate achievable with AD7490BRUZ?
The AD7490BRUZ achieves a maximum throughput rate of 1 MSPS when operated with a 20 MHz SCLK and VDD = 4.75 V to 5.25 V. At 3 V supplies, the maximum SCLK is 16 MHz, yielding 870 kSPS. Conversion time is strictly 16 SCLK cycles - so timing is fully predictable and deterministic for real-time control loops.
Does AD7490BRUZ require an external reference voltage?
Yes, AD7490BRUZ requires an external reference applied to the REFIN pin. The datasheet specifies 2.5 V ±1% for guaranteed performance. The device supports two input ranges: 0 V to REFIN (straight binary) or 0 V to 2 × REFIN (twos complement), selectable via the RANGE bit in the control register.
Can AD7490BRUZ interface directly with a 3.3 V microcontroller while powered from 5 V?
Yes - the VDRIVE pin allows independent logic-level configuration. Set VDRIVE = 3.3 V while VDD = 5 V, and AD7490BRUZ's digital interface (CS, SCLK, DIN, DOUT) operates at 3.3 V logic levels, enabling seamless connection to 3.3 V MCUs without level shifters, even when analog circuitry runs at 5 V for improved SNR.
What is the purpose of the sequencer in AD7490BRUZ?
The sequencer in AD7490BRUZ autonomously cycles through a user-defined subset of its 16 analog inputs (e.g., VIN0–VIN7) without host intervention. It is programmed via the SEQ and SHADOW bits and ADD3–ADD0 address bits in the control register, reducing CPU overhead in continuous multichannel acquisition tasks like power quality monitoring.
Is AD7490BRUZ qualified for automotive applications?
Yes - the AD7490BRUZ is AEC-Q100 qualified for automotive applications. It is rated for operation from −40°C to +85°C (B grade), features robust ESD protection (±2000 V HBM), and meets stringent reliability and qualification testing standards required for use in engine control, battery management, and ADAS sensor interfaces.
AD7490BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 16
- Input Type:
- Single Ended
- Data Interface:
- DSP, MICROWIRE™, QSPI™, and SPI™
- 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:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7490BRUZ FAQ
1.How can I place an order for AD7490BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7490BRUZ 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 AD7490BRUZ reliable?
The price and inventory of AD7490BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7490BRUZ is usually 5 days.
3.What payment methods are accepted for AD7490BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7490BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7490BRUZ?
AD7490BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7490BRUZ 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 AD7490BRUZ?
For technical support, including AD7490BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7490BRUZ requirements.
6.How does Aetrix verify that AD7490BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7490BRUZ 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 AD7490BRUZ meets industry standards.
7.What is the process for return or replacement of AD7490BRUZ?
All AD7490BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7490BRUZ, 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 AD7490BRUZ part is unused and in its original packaging.
Return procedure for AD7490BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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