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Analog Devices Inc. AD7490WBCPZ
- Part No.:
- AD7490WBCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7490WBCPZ.pdf
- Description:
- 12 BIT 16 CHANNEL ADC IC
- Quantity:
- Payment:
- Shipping:
Inventory:192
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Product details
Overview
AD7490WBCPZ 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, −82 dB channel-to-channel isolation, and AEC-Q100 qualification for automotive sensor monitoring and battery-powered data acquisition systems.
For engineers reviewing the AD7490WBCPZ datasheet, AD7490WBCPZ pinout, AD7490WBCPZ application, or AD7490WBCPZ equivalent, key selection criteria include its 16 single-ended input support with programmable sequencing, VDRIVE-independent 3 V/5 V serial interface compatibility, full shutdown current of 0.5 µA, and LFCSP-32 automotive-grade packaging.
Technical Context
The AD7490WBCPZ uses a track-and-hold amplifier with 8.2 MHz full-power bandwidth and samples on the falling edge of CS-no pipeline delay. Conversion timing is fully synchronized to SCLK (up to 20 MHz), requiring exactly 16 clock cycles per conversion.
It supports dual analog input ranges (0 V to REFIN or 0 V to 2 × REFIN) via the RANGE bit, with configurable output coding (straight binary or twos complement). The sequencer enables preprogrammed channel cycling across all 16 VIN inputs without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale range for precise sensor digitization |
| Throughput Rate | 1 MSPS - enables real-time capture of fast transients in power line monitoring |
| SNR @ 50 kHz | 68.8 dB (typ) - ensures >11.4 effective bits for high-fidelity signal reconstruction |
| Channel Count | 16 single-ended inputs - reduces external multiplexer count and PCB area in multichannel systems |
| Supply Range | 2.7 V to 5.25 V - supports direct integration into 3.3 V and 5 V industrial or automotive subsystems |
| Full Shutdown Current | 0.5 µA max - extends battery life in portable instrumentation during idle periods |
| VDRIVE Range | 2.7 V to 5.25 V - allows SPI interface to operate at 3 V logic levels even when VDD = 5 V |
Pinout & Package
AD7490WBCPZ is packaged in a 32-lead LFCSP (CP-32-3) with exposed pad, rated for −40°C to +125°C operation and AEC-Q100 qualified. All AGND pins (12, 19, 22) and EPAD must be connected to analog ground for optimal noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN15 | Analog Input Channels | 16 single-ended inputs routed through internal MUX; unused channels must tie to AGND to prevent noise coupling |
| CS | Chip Select | Active-low conversion trigger and SPI frame sync; sampling occurs on falling edge |
| SCLK | Serial Clock | Master clock for both SPI communication and ADC conversion timing (16 cycles per sample) |
| DOUT | Serial Data Output | MSB-first stream: 4 address bits + 12 data bits; tri-state controlled by CS |
| DIN | Serial Data Input | Writes to 16-bit control register (address, RANGE, CODING, SEQ, SHADOW bits) |
| REFIN | Reference Input | 2.5 V ±1% external reference; sets full-scale range and impacts gain error match (±1.5 LSB) |
| VDRIVE | Logic Supply | Defines SPI I/O voltage level independently of VDD-enables mixed-voltage system interfacing |
| AGND (×3) | Analog Ground | Common reference for all analog signals, REFIN, and internal circuitry; requires low-impedance star connection |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Channel Sequencer | Enables autonomous scanning of up to 16 inputs without CPU intervention-reduces firmware overhead in telemetry systems |
| VDRIVE-Independent SPI Interface | Allows direct connection to 3 V microcontrollers while VDD = 5 V-eliminates level-shifter components in mixed-supply designs |
| No Pipeline Delay | Guarantees deterministic latency: conversion completes within 800 ns after CS fall-critical for time-triggered control loops |
| AEC-Q100 Qualified (Grade 1) | Validated for automotive under-hood applications including engine control and battery management units |
| Flexible Input Ranging | Supports 0 V to REFIN (single-ended) or −REFIN to +REFIN (twos complement) - simplifies bipolar sensor interfacing |
Applications
| Automotive Battery Monitoring | Industrial Power Line Analyzer |
|---|---|
Use Scenario: Real-time voltage/current sampling across 12-cell Li-ion battery packs in EV traction inverters. IC Role / Device Role / Timing Role: 16-channel ADC captures cell voltages sequentially using internal sequencer; CS-triggered sampling ensures synchronization with isolation gate drivers. Use Value: Eliminates need for external multiplexers and timing controllers-reducing BOM cost and layout complexity while maintaining <1 µs inter-channel skew. |
Use Scenario: Simultaneous measurement of phase voltages, currents, and harmonic content in 3-phase AC distribution panels. IC Role / Device Role / Timing Role: High-SNR (68.8 dB) digitization at 1 MSPS enables accurate FFT-based THD and SFDR calculation per IEC 61000-4-7. Use Value: Achieves Class A power quality compliance without oversampling or external anti-aliasing filters-cutting system latency by 40% vs. sigma-delta alternatives. |
| Portable Multimeter Front-End | Condition Monitoring Sensor Hub |
Use Scenario: Handheld test equipment measuring DC/AC voltage, resistance, and temperature with auto-ranging and autoranging. IC Role / Device Role / Timing Role: Configurable 0 V to 2 × REFIN input range accommodates ±2.5 V differential sensor outputs; VDRIVE = 3.3 V enables direct MCU SPI link. Use Value: Full shutdown mode (0.5 µA) extends alkaline battery life to >200 hours between charges-meeting IEC 61010 portability requirements. |
Use Scenario: Edge node collecting vibration, temperature, and humidity from 8+ industrial motors in predictive maintenance deployments. IC Role / Device Role / Timing Role: Sequencer cycles through thermocouple, RTD, and accelerometer signal chains; channel-to-channel isolation (−82 dB) prevents cross-talk in shared analog routing. Use Value: Single-chip solution replaces discrete ADC + mux + PGA stack-reducing footprint by 65% and enabling IP67-rated enclosure integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7492WBCPZ | 8-channel version, identical 1 MSPS rate and LFCSP-32 package but lacks sequencer logic | Requires external channel management firmware; unsuitable for autonomous scan use cases | Select only when channel count ≤8 and sequencer functionality is unnecessary |
| ADS8688IPWR | 8-channel, SAR ADC with integrated reference and 1 MSPS rate; uses SPI but no sequencer; TSSOP-38 package | Higher 14-bit resolution but lower SNR (72 dB); not AEC-Q100 qualified; larger footprint | Prefer for precision lab instrumentation where automotive qualification is irrelevant |
Compared with AD7490WBCPZ, AD7492WBCPZ reduces channel count without altering speed or power, making it suitable for simpler systems; ADS8688IPWR trades automotive reliability and sequencer autonomy for higher resolution and integrated reference-requiring layout redesign and qualification revalidation.
Availability
AD7490WBCPZ is available at Aetrix Electronics and suitable for automotive battery management, industrial power monitoring, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7490WBCPZ 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, headquartered in Norwood, MA, with design centers worldwide.
The AD7490WBCPZ belongs to Analog Devices' precision data acquisition portfolio, engineered specifically for automotive and industrial applications demanding high channel density, low power, and AEC-Q100 reliability in harsh environments.
FAQ
What is the maximum operating temperature range for the AD7490WBCPZ?
The AD7490WBCPZ is rated for −40°C to +125°C operation and is AEC-Q100 qualified for Grade 1 automotive applications. This extended range is validated across all electrical specifications-including SNR, INL, and throughput-making it suitable for under-hood and industrial control environments where thermal stability is critical. The W suffix explicitly denotes this wide-temperature grade.
Does the AD7490WBCPZ require an external reference voltage?
Yes, the AD7490WBCPZ requires an external reference applied to the REFIN pin. The datasheet specifies 2.5 V ±1% for guaranteed performance, though the device supports input ranges scaled to REFIN or 2 × REFIN. No internal reference is present-REFIN directly defines full-scale accuracy, gain error match (±1.5 LSB), and SNR performance.
How does the sequencer function in the AD7490WBCPZ?
The AD7490WBCPZ sequencer is configured via the SEQ and SHADOW bits in its 16-bit control register and enables autonomous, preprogrammed cycling through any subset of the 16 VIN channels. Once initiated, it performs consecutive conversions without host CPU involvement-reducing interrupt load and jitter in real-time data acquisition systems such as motor control feedback loops.
Can the AD7490WBCPZ interface directly with a 3.3 V microcontroller SPI bus?
Yes-the VDRIVE pin allows the AD7490WBCPZ serial interface to operate at 3.3 V logic levels independent of VDD. When VDRIVE = 3.3 V, DIN, DOUT, CS, and SCLK meet 3.3 V CMOS thresholds (VIH = 2.31 V, VIL = 1.0 V), enabling direct connection to common 3.3 V MCUs without level shifters-even if VDD is set to 5 V for analog section optimization.
What is the purpose of the three AGND pins on the AD7490WBCPZ LFCSP package?
The AD7490WBCPZ provides three dedicated AGND pins (pins 12, 19, 22) to minimize ground impedance and separate analog return paths for the reference, analog inputs, and internal core. Proper star connection of all AGND pins-and the exposed pad-to a solid analog ground plane is essential to achieve specified SNR (68.8 dB) and channel-to-channel isolation (−82 dB), especially at 1 MSPS throughput.
AD7490WBCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for AD7490WBCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7490WBCPZ 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 reliable?
The price and inventory of AD7490WBCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7490WBCPZ is usually 5 days.
3.What payment methods are accepted for AD7490WBCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7490WBCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7490WBCPZ?
AD7490WBCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7490WBCPZ 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?
For technical support, including AD7490WBCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7490WBCPZ requirements.
6.How does Aetrix verify that AD7490WBCPZ is sourced from the original manufacturer or authorized distributors?
All AD7490WBCPZ 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 meets industry standards.
7.What is the process for return or replacement of AD7490WBCPZ?
All AD7490WBCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7490WBCPZ, 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 part is unused and in its original packaging.
Return procedure for AD7490WBCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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