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Analog Devices Inc. AD7490WBCSZ-REEL7
- Part No.:
- AD7490WBCSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7490WBCSZ-REEL7.pdf
- Description:
- 12 BIT 16 CHANNEL ADC IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,146
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Product details
Overview
AD7490WBCSZ-REEL7 from Analog Devices is a 12-bit, 16-channel, successive approximation ADC with integrated sequencer, operating at up to 1 MSPS with 2.7 V to 5.25 V single-supply operation. It delivers 69.5 dB SNR at 50 kHz input, supports 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 automotive power line monitoring.
For engineers reviewing the AD7490WBCSZ-REEL7 datasheet, AD7490WBCSZ-REEL7 pinout, AD7490WBCSZ-REEL7 application, or AD7490WBCSZ-REEL7 equivalent, key selection considerations include its AEC-Q100 qualification, 32-lead LFCSP package, 12-bit resolution with ±1 LSB INL, sequencer-controlled 16-channel conversion, and VDRIVE pin enabling independent 3 V/5 V logic interfacing.
Technical Context
The AD7490WBCSZ-REEL7 implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and 50 ps aperture jitter, supporting accurate sampling of signals beyond 1 MHz. Its conversion is initiated on the falling edge of CS and clocked by SCLK, requiring exactly 16 SCLK cycles per conversion with no pipeline delay.
It uses a programmable control register to configure input range (RANGE bit), output coding (CODING bit), sequencer mode (SEQ bit), and tri-state behavior (WEAK/TRI bit). The sequencer enables preprogrammed channel cycling across all 16 VIN0–VIN15 inputs without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for precise analog measurement |
| Throughput Rate | 1 MSPS - supports real-time sampling of fast transients in power monitoring systems |
| Input Channels | 16 single-ended - enables compact multichannel data acquisition without external MUX |
| SNR @ 50 kHz | 69.5 dB - ensures high-fidelity signal capture for instrumentation-grade accuracy |
| Supply Range | 2.7 V to 5.25 V - allows direct integration into 3 V or 5 V embedded systems |
| VDRIVE Range | 2.7 V to 5.25 V - decouples serial interface voltage from VDD for mixed-voltage MCU interfacing |
| Full Shutdown Current | 0.5 µA max - enables ultra-low-power sleep modes in battery-powered equipment |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive use |
Pinout & Package
AD7490WBCSZ-REEL7 is housed in a 32-lead LFCSP (5 mm × 5 mm, 0.8 mm height) with exposed pad connected to AGND. Pin functions are validated per Analog Devices Rev. E datasheet Figures 4 and Table 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN15 | Analog Input Channels | 16 single-ended inputs multiplexed into internal T/H; unused channels must tie to AGND |
| REFIN | Reference Input | Accepts 2.5 V ±1% external reference; sets full-scale range for conversion |
| CS | Chip Select | Active-low signal initiating conversion and framing serial data transfer |
| SCLK | Serial Clock | Master clock for both serial interface and internal ADC conversion timing |
| DIN / DOUT | Serial Data I/O | Half-duplex SPI interface: DIN loads control register; DOUT outputs 4-bit address + 12-bit result MSB-first |
| VDRIVE | Logic Supply | Defines voltage level for CS, SCLK, DIN, DOUT - independent of VDD |
| AGND | Analog Ground | Common reference for all analog signals and REFIN; three dedicated pins for low-noise layout |
| EPAD | Exposed Pad | Thermal and electrical connection to AGND; required for thermal performance and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sequencer | Enables autonomous, preprogrammed scanning of up to 16 channels without CPU overhead |
| AEC-Q100 Qualified | Validated for automotive applications including engine control and battery management systems |
| No Pipeline Delay | Guarantees deterministic latency: conversion completes within fixed 16-SCLK window |
| VDRIVE Pin | Allows direct connection to 3 V or 5 V microcontrollers regardless of VDD supply voltage |
| Flexible Input Ranges | Software-selectable 0 V to REFIN (straight binary) or 0 V to 2×REFIN (twos complement) |
| Low Power at Speed | Consumes only 5.4 mW at 1 MSPS with 3 V supplies - ideal for portable instrumentation |
Applications
| Automotive Power Line Monitoring | Battery Management Systems |
|---|---|
Use Scenario: Real-time voltage/current sensing across multiple battery cells and DC bus lines in EV power electronics. IC Role / Device Role / Timing Role: 16-channel ADC captures synchronized samples from shunt resistors, voltage dividers, and temperature sensors at 1 MSPS. Use Value: AEC-Q100 qualification and −40°C to +125°C operation ensure reliability in under-hood environments; sequencer reduces MCU polling load. |
Use Scenario: Multicell Li-ion pack monitoring requiring simultaneous voltage, current, and temperature acquisition. IC Role / Device Role / Timing Role: AD7490WBCSZ-REEL7 digitizes up to 16 cell voltages and auxiliary sensor signals with 12-bit precision and <1 µs channel-to-channel skew. Use Value: Low 0.5 µA shutdown current extends standby life; flexible 0 V to 2×REFIN range supports differential measurements around mid-rail. |
| Industrial Process Control | Portable Data Acquisition |
Use Scenario: Distributed sensor nodes measuring pressure, flow, and temperature in factory automation systems. IC Role / Device Role / Timing Role: Acts as central analog front-end converting 16 sensor outputs with programmable gain and sequencing. Use Value: SPI interface simplifies connection to ARM Cortex-M MCUs; 69.5 dB SNR ensures accurate 16-bit-equivalent resolution in noisy plant environments. |
Use Scenario: Handheld test equipment requiring high-speed, multi-signal capture with long battery life. IC Role / Device Role / Timing Role: Core ADC in portable oscilloscopes or waveform analyzers acquiring transient events at 1 MSPS. Use Value: 5.4 mW power at 3 V enables >10-hour runtime on AA batteries; small LFCSP footprint saves PCB space. |
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 | 8-channel, same 12-bit resolution, 1 MSPS, identical LFCSP-32 package and AEC-Q100 rating | Lower channel count suits cost-sensitive designs where ≤8 inputs suffice | Select when system requires fewer analog inputs and board space is constrained but automotive qualification remains essential |
| ADS8688IPWR | Texas Instruments 16-channel, 16-bit, 1 MSPS SAR ADC; wider 2.7 V to 5.5 V supply; no AEC-Q100 rating | Higher resolution for precision metrology; lacks automotive qualification and sequencer flexibility | Choose when 16-bit accuracy outweighs AEC-Q100 need and TI ecosystem support is preferred |
Compared with AD7490WBCSZ-REEL7, AD7492WBCPZ-REEL7 reduces channel count while preserving automotive compliance and footprint, whereas ADS8688IPWR trades qualification for higher resolution and different register architecture - neither is pin-compatible, and both require layout and firmware adaptation.
Availability
AD7490WBCSZ-REEL7 is available at Aetrix Electronics and suitable for automotive power line monitoring, battery management systems, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7490WBCSZ-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.
The AD7490 belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-speed, multichannel data acquisition in automotive, industrial, and instrumentation applications demanding AEC-Q100 compliance and low-power operation.
FAQ
What is the maximum sample rate supported by the AD7490WBCSZ-REEL7?
The AD7490WBCSZ-REEL7 supports a maximum throughput rate of 1 MSPS when operated with a 20 MHz SCLK and VDD between 4.75 V and 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 depends on configured clock frequency and interface timing margins.
Does the AD7490WBCSZ-REEL7 require an external reference voltage?
Yes, the AD7490WBCSZ-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), selected via the RANGE bit in the control register.
Is the AD7490WBCSZ-REEL7 pin-compatible with other members of the AD749x family?
No, the AD7490WBCSZ-REEL7 is not pin-compatible with AD7492 or AD7495 variants. While all share the 32-lead LFCSP package outline, pin assignments differ - notably, AD7492 has only 8 analog inputs and reassigns several NC pins. Layout reuse is not possible without verification against each device's specific pin configuration diagram.
How does the sequencer function in the AD7490WBCSZ-REEL7?
The AD7490WBCSZ-REEL7 sequencer is controlled by the SEQ bit and sequence register. When enabled, it automatically cycles through a user-defined subset of the 16 VIN0–VIN15 channels in ascending order, performing conversions without host intervention. Channel selection is encoded in the ADD3–ADD0 bits of the control register, and the sequencer advances after each conversion completes.
What is the purpose of the VDRIVE pin on the AD7490WBCSZ-REEL7?
The VDRIVE pin on the AD7490WBCSZ-REEL7 sets the logic threshold voltage for CS, SCLK, DIN, and DOUT. It allows the serial interface to operate at 3 V or 5 V independently of VDD, enabling seamless interfacing with mixed-voltage microcontrollers - for example, connecting to a 3 V ARM core while VDD is powered from a 5 V rail.
AD7490WBCSZ-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-SS (5x5)
- Mounting Type:
- Surface Mount, Wettable Flank
- Grade:
- Automotive
- Qualification:
- AEC-Q100
AD7490WBCSZ-REEL7 FAQ
1.How can I place an order for AD7490WBCSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7490WBCSZ-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 AD7490WBCSZ-REEL7 reliable?
The price and inventory of AD7490WBCSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7490WBCSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7490WBCSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7490WBCSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7490WBCSZ-REEL7?
AD7490WBCSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7490WBCSZ-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 AD7490WBCSZ-REEL7?
For technical support, including AD7490WBCSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7490WBCSZ-REEL7 requirements.
6.How does Aetrix verify that AD7490WBCSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7490WBCSZ-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 AD7490WBCSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7490WBCSZ-REEL7?
All AD7490WBCSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7490WBCSZ-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 AD7490WBCSZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7490WBCSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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