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Analog Devices Inc. AD7490BRUZ-REEL7
- Part No.:
- AD7490BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7490BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,297
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Product details
Overview
AD7490BRUZ-REEL7 from Analog Devices is a 12-bit, 16-channel, successive approximation ADC with integrated sequencer, operating from a single 2.7 V to 5.25 V supply and delivering up to 1 MSPS throughput. It features 69.5 dB SNR at 50 kHz input, 0.5 µA full shutdown current, and SPI/QSPI/MICROWIRE/DSP-compatible serial interface. It is used in multichannel system monitoring and power line monitoring where high channel density and low power are critical.
For engineers reviewing the AD7490BRUZ-REEL7 datasheet, AD7490BRUZ-REEL7 pinout, AD7490BRUZ-REEL7 application, or AD7490BRUZ-REEL7 equivalent, key selection criteria include guaranteed no-missed-codes DNL, channel-to-channel isolation of −82 dB at 400 kHz, flexible 0 V to REFIN or 0 V to 2 × REFIN input range selection, and VDRIVE pin enabling independent 3 V/5 V logic interfacing without level-shifting.
Technical Context
The AD7490BRUZ-REEL7 implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and 300 ns acquisition time, supporting input frequencies beyond 1 MHz. Its conversion is initiated on the falling edge of CS and clocked entirely by SCLK - no pipeline delay, no latency between sampling and result availability.
It uses a 16-cycle SCLK-per-conversion timing model (e.g., 800 ns at 20 MHz), with configurable control register bits selecting input range (RANGE), output coding (CODING), sequencer mode (SEQ), and output drive strength (WEAK/TRI). The sequencer enables preprogrammed cycling across up to 16 single-ended channels without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.0244% of full-scale for precise industrial sensing and instrumentation. |
| Throughput Rate | 1 MSPS - supports real-time capture of fast transients in power quality monitoring and motor control feedback loops. |
| SNR @ 50 kHz | 69.5 dB - enables accurate measurement of low-amplitude signals in noisy environments like battery-powered data loggers. |
| Channel Count | 16 single-ended inputs - reduces component count and PCB area in multichannel systems such as PLC analog input modules. |
| Full Shutdown Current | 0.5 µA - extends battery life in portable equipment during idle periods without requiring external power gating. |
| Input Voltage Range | Selectable 0 V to REFIN or 0 V to 2 × REFIN - accommodates both unipolar sensor outputs and bipolar differential signals referenced to REFIN. |
| VDRIVE Supply | Independent 2.7 V–5.25 V logic rail - allows direct connection to 3 V microcontrollers or 5 V DSPs while VDD powers analog circuitry. |
Pinout & Package
AD7490BRUZ-REEL7 is supplied in a 28-lead TSSOP package (JEDEC MO-220, 9.7 mm × 4.4 mm × 1.2 mm) with exposed thermal pad connected to AGND. Pin 1 is VIN11; pins 4 and 18 are NC and must be tied 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; defines start of 16-bit read cycle. |
| DOUT (Pin 15) | Serial Data Output | 3-state output delivering 4-bit channel address + 12-bit result MSB-first - requires external pull-up if shared bus used in multi-device systems. |
| SCLK (Pin 16) | Serial Clock | Master clock for both data transfer and internal conversion timing - 20 MHz max supports 1 MSPS; duty cycle 40/60 to 60/40 specified. |
| VIN0–VIN15 (Pins 13–5, 3–1, 28–25) | Analog Inputs | 16 single-ended channels multiplexed into internal T/H - unused channels must be tied to AGND to prevent noise coupling and crosstalk degradation. |
| REFIN (Pin 23) | Reference Input | 2.5 V ±1% external reference input - sets full-scale range; impedance ~36 kΩ at 1 MSPS, requiring low-Z source or buffer for optimal performance. |
| VDRIVE (Pin 17) | Logic Power Supply | Defines voltage level for all digital I/O (CS, DIN, DOUT, SCLK) - decoupled independently from VDD to avoid digital noise injection into analog section. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Sampled value appears on DOUT within 16 SCLK cycles - eliminates latency uncertainty in closed-loop control applications. |
| Programmable sequencer | Control register configures automatic round-robin conversion across user-defined subset of 16 channels - reduces host CPU overhead in data acquisition systems. |
| Flexible input range | RANGE bit selects 0 V to REFIN (unipolar) or 0 V to 2 × REFIN (bipolar-referenced) - enables single-supply operation with rail-to-rail input capability. |
| VDRIVE independence | Digital I/O operates at VDRIVE voltage regardless of VDD - permits mixed-voltage system integration without level translators or additional power rails. |
| AEC-Q100 qualified | Rated for automotive temperature range (−40°C to +125°C) - suitable for under-hood engine control and battery management without derating. |
Applications
| Power Line Monitoring | Multichannel System Monitoring |
|---|---|
|
Use Scenario: Real-time acquisition of voltage, current, and harmonic content across 3-phase distribution panels with neutral and ground leakage detection. IC Role / Device Role / Timing Role: 16-channel ADC digitizes isolated analog sensor outputs; sequencer cycles through CT/PT channels synchronously with zero-crossing triggers. Use Value: 1 MSPS throughput captures 50/60 Hz fundamentals plus 40th harmonics (2–2.4 kHz); −82 dB channel isolation prevents cross-phase interference in dense sensor arrays. |
Use Scenario: Simultaneous monitoring of temperature, pressure, flow, and valve position in industrial PLC backplanes or modular I/O racks. IC Role / Device Role / Timing Role: Centralized analog front-end converting up to 16 sensor signals per module; sequencer minimizes host polling frequency and firmware complexity. Use Value: 12-bit resolution with guaranteed no-missed-codes ensures accurate representation of 4–20 mA loop signals; 0.5 µA shutdown current enables energy-efficient sleep modes between scans. |
| Battery-Powered Data Loggers | Automotive Battery Management Systems |
|
Use Scenario: Long-duration environmental logging in remote locations using solar-charged Li-ion batteries, measuring temperature, humidity, and light intensity. IC Role / Device Role / Timing Role: Low-power ADC acquiring from multiple sensors at adaptive rates; full shutdown activated between samples to minimize quiescent draw. Use Value: 5.4 mW at 870 kSPS (3 V) and 0.5 µA shutdown enable >1-year operation on 2000 mAh cells; 2.7 V minimum VDD supports deep battery discharge before cutoff. |
Use Scenario: Cell voltage, temperature, and pack current monitoring in EV traction battery packs, requiring AEC-Q100 compliance and high reliability. IC Role / Device Role / Timing Role: High-accuracy ADC in BMS slave controllers performing periodic cell balancing verification and thermal runaway detection. Use Value: AEC-Q100 W-grade qualification (−40°C to +125°C) ensures operation under hood conditions; 69.5 dB SNR preserves resolution for <1 mV cell voltage deltas critical to SoC estimation. |
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 |
|---|---|---|---|
| AD7476AARZ-REEL7 | Single-channel, 12-bit, 1 MSPS SAR ADC; no sequencer; 20-lead QSOP package. | Lacks channel multiplexing and sequencing - requires external MUX and controller coordination for multichannel use. | Choose when only one analog signal needs digitization per node, or when board space favors smaller package over channel count. |
| ADS8688IPWR | 8-channel, 16-bit, 1 MSPS SAR ADC; integrated reference; SPI interface; 38-lead TSSOP. | Higher resolution but fewer channels; built-in 4.096 V reference eliminates external REFIN sourcing; no VDRIVE pin. | Prefer when 16-bit precision is mandatory and channel count ≤8 suffices; avoid if VDRIVE decoupling or bipolar input range flexibility is required. |
Compared with AD7490BRUZ-REEL7, AD7476AARZ-REEL7 reduces integration but increases system-level design effort for multichannel systems, while ADS8688IPWR trades channel count and interface flexibility for higher resolution and reference integration - making AD7490BRUZ-REEL7 optimal for cost-sensitive, high-channel-count, mixed-voltage industrial and automotive sensing.
Availability
AD7490BRUZ-REEL7 is available at Aetrix Electronics and suitable for multichannel system monitoring, battery-powered equipment, and power line monitoring requiring stable component supply across automotive, industrial, and instrumentation programs.
Supply support for AD7490BRUZ-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 a focus on precision signal chain solutions.
The AD7490BRUZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, multichannel data acquisition in harsh environments - emphasizing channel integrity, power efficiency, and seamless microprocessor interfacing.
FAQ
What is the maximum sample rate supported by the AD7490BRUZ-REEL7?
The AD7490BRUZ-REEL7 supports a maximum throughput rate of 1 MSPS when operated with VDD = 4.75 V to 5.25 V and SCLK = 20 MHz. At 3 V supplies, the maximum rate is 870 kSPS due to SCLK limitation. Conversion time is fixed at 16 SCLK cycles, so actual rate depends on configured SCLK frequency and interface overhead.
Does the AD7490BRUZ-REEL7 require an external reference voltage?
Yes, the AD7490BRUZ-REEL7 requires an external reference 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 (straight binary) or 0 V to 2 × REFIN (twos complement), both dependent on this externally supplied reference.
How does the sequencer function in the AD7490BRUZ-REEL7?
The AD7490BRUZ-REEL7 sequencer is controlled via the SEQ bit and address bits (ADD3–ADD0) in its internal control register. When enabled, it automatically cycles through a preselected set of up to 16 channels in ascending order, eliminating the need for repeated host writes to change the input channel before each conversion.
What package type is used for the AD7490BRUZ-REEL7?
The AD7490BRUZ-REEL7 is packaged in a 28-lead TSSOP (Thin Shrink Small Outline Package) with dimensions 9.7 mm × 4.4 mm × 1.2 mm and an exposed thermal pad that must be soldered to AGND for thermal and electrical performance. This differs from the LFCSP variant (AD7490BCPZ-REEL7) which uses a 32-lead chip-scale package.
Is the AD7490BRUZ-REEL7 suitable for automotive applications?
Yes - the AD7490BRUZ-REEL7 is AEC-Q100 qualified for automotive applications and rated for operation from −40°C to +125°C (W-grade). Its robust ESD ratings (±1000 V HBM in LFCSP, ±2000 V HBM in TSSOP), wide supply range, and channel isolation make it appropriate for battery monitoring, powertrain sensing, and body electronics in vehicles.
AD7490BRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-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:
- 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-REEL7 FAQ
1.How can I place an order for AD7490BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7490BRUZ-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 AD7490BRUZ-REEL7 reliable?
The price and inventory of AD7490BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7490BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7490BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7490BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7490BRUZ-REEL7?
AD7490BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7490BRUZ-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 AD7490BRUZ-REEL7?
For technical support, including AD7490BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7490BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7490BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7490BRUZ-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 AD7490BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7490BRUZ-REEL7?
All AD7490BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7490BRUZ-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 AD7490BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7490BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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