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Analog Devices Inc. AD7490WBCPZ-REEL7
- Part No.:
- AD7490WBCPZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7490WBCPZ-REEL7.pdf
- Description:
- 12 BIT 16 CHANNEL ADC IC
- Quantity:
- Payment:
- Shipping:
Inventory:2,075
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Product details
Overview
AD7490WBCPZ-REEL7 from Analog Devices is a 12-bit, 16-channel, successive approximation ADC with integrated sequencer, operating at up to 1 MSPS throughput on single 2.7 V–5.25 V supply, delivering 69.5 dB SNR at 50 kHz input and supporting 0 V to REFIN or 0 V to 2 × REFIN input ranges - used in automotive battery monitoring and multichannel power line sensing systems.
For engineers reviewing the AD7490WBCPZ-REEL7 datasheet, AD7490WBCPZ-REEL7 pinout, AD7490WBCPZ-REEL7 application, or AD7490WBCPZ-REEL7 equivalent, key selection considerations include AEC-Q100 qualification, 32-lead LFCSP package, sequencer-controlled channel cycling, SPI/QSPI/MICROWIRE-compatible serial interface, and full shutdown current of ≤0.5 µA.
Technical Context
The AD7490WBCPZ-REEL7 implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and aperture jitter of 50 ps, enabling accurate sampling of fast analog signals. Its conversion timing is fully synchronized to the SCLK falling edge, with no pipeline delay and fixed 16-cycle conversion time (e.g., 800 ns at 20 MHz SCLK).
Control logic uses a 16-bit register with programmable RANGE, CODING, SEQ, and SHADOW bits to configure input range (0 V–REFIN or 0 V–2×REFIN), output coding (straight binary or twos complement), and sequencer behavior. The VDRIVE pin decouples serial I/O voltage (2.7 V–5.25 V) from VDD, allowing direct interfacing with 3 V or 5 V microcontrollers independent of analog supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale range for precise measurement of sensor or voltage signals. |
| Throughput Rate | 1 MSPS - supports real-time capture of transient events in power quality monitoring and motor control feedback loops. |
| SNR @ 50 kHz | 69.5 dB - enables detection of low-amplitude signals buried in noise, critical for high-fidelity instrumentation. |
| Input Channels | 16 single-ended - reduces external multiplexer complexity and PCB area in multichannel data loggers. |
| Supply Range | 2.7 V to 5.25 V - allows operation from Li-ion batteries (3.0–4.2 V) or industrial 5 V rails without level-shifting. |
| Full Shutdown Current | ≤0.5 µA - extends battery life in portable diagnostic tools during idle periods between acquisition bursts. |
| Operating Temperature | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive electronics. |
Pinout & Package
AD7490WBCPZ-REEL7 is packaged in a 32-lead, 5 mm × 5 mm LFCSP (CP-32-3) with exposed pad, optimized for thermal performance (θJA = 108.2°C/W) and high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN15 | Analog Input Channels | 16 single-ended inputs routed through internal MUX; unused pins must be tied to AGND to prevent noise coupling. |
| REFIN | Reference Input | Accepts 2.5 V ±1% external reference; sets full-scale range for both 0 V–REFIN and 0 V–2×REFIN modes. |
| CS | Chip Select | Active-low signal that initiates conversion and frames serial data transfer; sampling occurs on its falling edge. |
| SCLK | Serial Clock | Master clock for both data transfer and ADC conversion; frequency directly determines throughput (e.g., 20 MHz → 1 MSPS). |
| DIN/DOUT | Serial Data I/O | 3-wire SPI-compatible interface; DOUT outputs 4-bit channel address + 12-bit result MSB-first; DIN loads control register. |
| VDRIVE | Logic Supply | Independent 2.7 V–5.25 V rail for digital interface - enables seamless connection to 3 V or 5 V host processors regardless of VDD. |
| AGND | Analog Ground | Three dedicated pins (LFCSP Pins 3, 6, 22); all must be connected to low-impedance analog ground plane to maintain DC accuracy and SNR. |
| EPAD | Exposed Thermal Pad | Internally connected to AGND; must be soldered to PCB thermal pad for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sequencer | Enables automatic cycling through preselected VIN channels without host CPU intervention - reduces firmware overhead in telemetry systems. |
| VDRIVE Voltage Independence | Allows serial interface to operate at 3 V or 5 V while VDD powers analog circuitry - eliminates level shifters in mixed-voltage automotive ECUs. |
| No Pipeline Delay | Guarantees deterministic latency: conversion completes exactly 16 SCLK cycles after CS assertion - essential for time-critical closed-loop control. |
| AEC-Q100 Qualified | Validated for automotive Grade 1 (−40°C to +125°C) per AD7490W variant - supports deployment in engine control, battery management, and ADAS sensors. |
| Flexible Reference Range | Software-selectable 0 V–REFIN (straight binary) or 0 V–2×REFIN (twos complement) - accommodates bipolar signal conditioning without external op-amps. |
Applications
| Automotive Battery Monitoring | Industrial Power Line Sensing |
|---|---|
|
Use Scenario: Real-time measurement of individual cell voltages and temperatures in 12–48 V EV battery packs under vibration and thermal stress. IC Role / Device Role / Timing Role: 16-channel ADC acquires synchronized samples across cell strings; sequencer automates round-robin scanning without CPU polling. Use Value: AEC-Q100 qualification and −40°C to +125°C operation ensure reliability in under-hood BMS modules; 1 MSPS rate captures transient overvoltage events. |
Use Scenario: Simultaneous sampling of phase voltages, currents, and neutral leakage in 3-phase industrial motor drives and smart breakers. IC Role / Device Role / Timing Role: Acts as front-end digitizer for isolation amplifiers; 69.5 dB SNR preserves harmonic content for accurate THD and power factor analysis. Use Value: Wide 8.2 MHz full-power bandwidth supports anti-aliasing filter design for 50/60 Hz fundamental + 40th harmonic (2–3 kHz); low 0.5 µA shutdown current minimizes standby loss. |
| Portable Diagnostic Equipment | Process Control Data Acquisition |
|
Use Scenario: Handheld multichannel oscilloscopes and power analyzers powered by rechargeable Li-ion batteries. IC Role / Device Role / Timing Role: Core ADC in battery-operated instruments; low 5.4 mW power at 3 V enables >8-hour runtime at 870 kSPS sampling. Use Value: Single-supply operation eliminates dual-rail regulators; sequencer reduces host processor load during burst-mode acquisition sequences. |
Use Scenario: Distributed I/O modules in PLC backplanes acquiring sensor data from pressure, temperature, and flow transmitters. IC Role / Device Role / Timing Role: High-channel-count digitizer interfaced to FPGA or ARM Cortex-M7; SPI compatibility simplifies integration with real-time OS drivers. Use Value: Channel-to-channel isolation >82 dB prevents crosstalk between 4–20 mA loop inputs; flexible 0 V–2×REFIN mode supports ratiometric sensor excitation. |
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 |
|---|---|---|---|
| AD7492WBCPZ-REEL7 | 12-bit, 8-channel, 1 MSPS - half the input count; identical LFCSP package, AEC-Q100 rating, and serial interface. | Lower channel density suits cost-sensitive automotive subsystems (e.g., HVAC sensor clusters) where <8 inputs suffice. | Select when system requires fewer than 16 channels and board space or BOM cost optimization is prioritized over channel scalability. |
| ADS8688IPWR | 16-bit, 8-channel, 1 MSPS - higher resolution but only 8 inputs; integrated reference and PGA; 2.7 V–5.5 V supply; not AEC-Q100 qualified. | Targeted at precision industrial DAQ where resolution >12 bits is mandatory, but automotive qualification is unnecessary. | Choose for test equipment or lab-grade instrumentation needing 16-bit accuracy; avoid for automotive safety-critical functions due to lack of AEC-Q100 certification. |
Compared with AD7492WBCPZ-REEL7, the AD7490WBCPZ-REEL7 provides double the channel count in the same footprint - critical for consolidated BMS or power analyzer designs. Against ADS8688IPWR, it trades resolution for AEC-Q100 compliance and lower power, making it preferable for automotive embedded systems requiring robustness over raw precision.
Availability
AD7490WBCPZ-REEL7 is available at Aetrix Electronics and suitable for automotive battery management, industrial power monitoring, and portable diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7490WBCPZ-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7490WBCPZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for high-channel-count, high-throughput data acquisition in thermally demanding and safety-critical automotive and industrial environments.
FAQ
What is the maximum sample rate supported by the AD7490WBCPZ-REEL7?
The AD7490WBCPZ-REEL7 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 fixed at 16 SCLK cycles, so actual rate scales linearly with clock frequency.
Does the AD7490WBCPZ-REEL7 require an external reference voltage?
Yes, the AD7490WBCPZ-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 configured via the RANGE bit in the control register.
How does the sequencer function in the AD7490WBCPZ-REEL7?
The AD7490WBCPZ-REEL7 sequencer is controlled by the SEQ and SHADOW bits in the 16-bit control register. When enabled, it automatically cycles through a preprogrammed set of VIN channels (defined by ADD3–ADD0), eliminating the need for repeated host writes to select each input - ideal for continuous multichannel monitoring in automotive and industrial systems.
Is the AD7490WBCPZ-REEL7 compatible with standard SPI interfaces?
Yes, the AD7490WBCPZ-REEL7 features a 3-wire SPI-compatible serial interface (CS, SCLK, DOUT/DIN) that operates with standard SPI, QSPI, MICROWIRE, and DSP protocols. It uses falling-edge clocking for both data input and output, and supports MSB-first transmission of 4-bit channel address followed by 12-bit conversion result.
What packaging and thermal specifications apply to the AD7490WBCPZ-REEL7?
The AD7490WBCPZ-REEL7 is supplied in a 32-lead LFCSP (CP-32-3) package measuring 5 mm × 5 mm with exposed pad. Its thermal resistance is θJA = 108.2°C/W and θJC = 32.71°C/W. The exposed pad must be soldered to a PCB thermal pad connected to AGND to ensure proper heat dissipation and noise immunity in automotive applications.
AD7490WBCPZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- 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 ~ 125°C
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
AD7490WBCPZ-REEL7 FAQ
1.How can I place an order for AD7490WBCPZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7490WBCPZ-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 AD7490WBCPZ-REEL7 reliable?
The price and inventory of AD7490WBCPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7490WBCPZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7490WBCPZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7490WBCPZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7490WBCPZ-REEL7?
AD7490WBCPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7490WBCPZ-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 AD7490WBCPZ-REEL7?
For technical support, including AD7490WBCPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7490WBCPZ-REEL7 requirements.
6.How does Aetrix verify that AD7490WBCPZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7490WBCPZ-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 AD7490WBCPZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7490WBCPZ-REEL7?
All AD7490WBCPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7490WBCPZ-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 AD7490WBCPZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7490WBCPZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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