My Inquiry
My Account
Analog Devices Inc. AD8418AWHRZ-RL
- Part No.:
- AD8418AWHRZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8418AWHRZ-RL.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,134
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8418AWHRZ-RL from Analog Devices is a bidirectional, zero-drift current sense amplifier optimized for high-side and low-side shunt-based current measurement in automotive motor and solenoid control systems. It delivers 20 V/V fixed gain, ±200 μV max input offset over −40°C to +150°C, 90 dB min DC CMRR, −2 V to +70 V continuous common-mode input range, and 250 kHz small-signal bandwidth.
For engineers reviewing the AD8418AWHRZ-RL datasheet, AD8418AWHRZ-RL pinout, AD8418AWHRZ-RL application, or AD8418AWHRZ-RL equivalent, key selection criteria include AEC-Q100 qualification, FMEA-tolerant 10-lead MSOP packaging, PWM common-mode rejection capability, ratiometric output offset adjustment, and compatibility with 2.7 V–5.5 V single-supply operation.
Technical Context
The AD8418AWHRZ-RL employs a proprietary zero-drift architecture enabling 0.1 μV/°C typical offset drift and <400 nV/°C max drift across −40°C to +150°C. Its EMI-filtered inputs and patented circuitry reject fast-changing PWM common-mode voltages up to 1 V/ns while maintaining stable 20 V/V gain accuracy (±0.15% over temperature).
It supports unidirectional and bidirectional operation via configurable reference pins (VREF1/VREF2), allowing ground-referenced, supply-referenced, or externally referenced output offsets - including ratiometric mid-scale biasing by connecting VREF1 to VS and VREF2 to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V fixed - enables direct interface with 12-bit+ ADCs using standard 50 mΩ shunts at ±50 A full scale. |
| Input Offset Voltage (max) | ±200 μV over −40°C to +150°C - ensures ≤±10 mV total output error at 20× gain without calibration. |
| Common-Mode Range | −2 V to +70 V continuous - supports high-side sensing in 12 V/24 V/48 V automotive systems with battery transients. |
| CMRR (min) | 90 dB at DC - rejects supply noise and ground bounce in noisy motor drive environments. |
| Bandwidth | 250 kHz - captures fast current transients during PWM switching edges in H-bridge and 3-phase inverters. |
| Supply Range | 2.7 V to 5.5 V - interoperable with 3.3 V microcontrollers and 5 V analog subsystems without level-shifting. |
| Quiescent Current | 4.2 mA at +150°C - enables thermally constrained under-hood placement with minimal self-heating impact. |
Pinout & Package
AD8418AWHRZ-RL is supplied in a RoHS-compliant, AEC-Q100 qualified 10-lead MSOP package (3.0 mm × 3.0 mm × 1.0 mm) engineered for FMEA compliance, featuring NC pins inserted between critical signal pairs to mitigate PCB short-fault risks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative Input | Connects to shunt resistor low-side node; withstands −2 V to +70 V common-mode voltage. |
| 2, 5, 9 (NC) | No Connect | FMEA-isolation pins - prevent catastrophic failure if adjacent traces short on PCB. |
| 3 (GND) | Analog Ground | Reference return for internal amplifiers; must be tied to low-impedance system ground plane. |
| 4 (VREF2) | Reference Input 2 | Configures output offset: tie to GND, VS, or external reference to set bias point (ratiometric or absolute). |
| 6 (OUT) | Analog Output | Buffered 20× amplified shunt voltage; drives 25 kΩ load with rail-to-rail swing (0.032 V to VS − 0.032 V). |
| 7 (VS) | Positive Supply | Accepts 2.7 V–5.5 V single supply; powers internal amplifiers and EMI filters. |
| 8 (VREF1) | Reference Input 1 | Paired with VREF2 to define output offset; identical function and electrical behavior to VREF2. |
| 10 (+IN) | Positive Input | Connects to shunt resistor high-side node; matches −IN in voltage rating and EMI immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Rated for −40°C to +150°C operation - validated for engine bay and transmission control unit deployment. |
| FMEA-tolerant 10-lead MSOP pinout | NC pins isolate −IN/GND and +IN/VREF1 - prevents latch-up or output saturation during adjacent trace shorts. |
| EMI-filtered inputs | Integrated RC filters suppress RF interference from ignition systems and power converters without external components. |
| Bidirectional current sensing | VREF1/VREF2 configuration enables true bipolar output (e.g., 2.5 V ±1 V for ±50 A) without external op amps. |
| PWM common-mode rejection | Stable operation with >1 V/ns dV/dt common-mode transients - eliminates measurement corruption during gate drive switching. |
| Ratiometric output offset | Tying VREF1 to VS and VREF2 to GND sets mid-scale output (VS/2) that tracks supply variations - simplifies ADC reference alignment. |
Applications
| Motor Control | Solenoid Control |
|---|---|
|
Use Scenario: Real-time phase current sampling in 3-phase BLDC motor inverters with space-vector PWM modulation. IC Role / Device Role / Timing Role: High-side current sense amplifier providing isolated, low-drift analog feedback to MCU ADC at 250 kHz bandwidth. Use Value: Enables precise field-oriented control (FOC) with <±0.5% current error across temperature, improving torque ripple and efficiency. |
Use Scenario: High-side current monitoring of 12 V automotive fuel injectors with diagnostic short-to-ground detection. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier interfacing with injector driver IC to validate actuation and detect open/short faults. Use Value: Measures recirculation current during switch-off to confirm solenoid de-energization and identify coil degradation pre-failure. |
| Power Management | Diagnostic Protection |
|
Use Scenario: Battery pack current monitoring in 48 V mild-hybrid systems with regenerative braking energy recovery. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier capturing charge/discharge currents with ±200 μV offset stability over life. Use Value: Supports accurate state-of-charge (SoC) estimation and thermal derating algorithms without periodic recalibration. |
Use Scenario: Overcurrent protection in electric power steering (EPS) H-bridge drivers with <100 ns fault response coordination. IC Role / Device Role / Timing Role: Primary current sensor feeding analog comparator or safety MCU for fast shutdown decision logic. Use Value: Delivers sub-μs transient response to short-circuit events while rejecting EMI from adjacent high-power MOSFET switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8417ARWZ-R7 | 60 V/V gain, ±150 μV max offset, same 10-lead MSOP package and −40°C to +150°C rating. | Better resolution for low-current (<±10 A) sensing; requires lower shunt resistance (e.g., 10 mΩ) to avoid saturation. | Select AD8417ARWZ-R7 when higher gain is needed to maximize ADC dynamic range with smaller shunts. |
| INA240A1QDRQ1 | 80 V/V gain, −4 V to +80 V common-mode, 120 dB CMRR, SOIC-8 package (no FMEA pinout). | Superior common-mode range and CMRR for 48 V systems; lacks integrated EMI filters and FMEA layout support. | Choose INA240A1QDRQ1 for ultra-high-noise environments requiring extended common-mode tolerance, accepting trade-offs in package robustness. |
Compared with AD8418AWHRZ-RL, AD8417ARWZ-R7 offers higher gain for precision low-current measurement but reduced headroom at high shunt voltages, while INA240A1QDRQ1 provides wider common-mode range and better CMRR at the expense of FMEA-ready packaging and integrated EMI filtering.
Availability
AD8418AWHRZ-RL is available at Aetrix Electronics and suitable for automotive motor control, solenoid actuation, and battery management systems requiring stable component supply, AEC-Q100 compliance, and high-temperature reliability.
Supply support for AD8418AWHRZ-RL 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 consumer markets since 1965.
The AD8418A product line was designed specifically for robust, high-accuracy current sensing in automotive powertrain and chassis systems, emphasizing zero-drift performance, PWM immunity, and functional safety-ready packaging.
FAQ
What is the operating temperature range specified for AD8418AWHRZ-RL?
AD8418AWHRZ-RL is rated for −40°C to +150°C operation, meeting AEC-Q100 Grade 0 requirements. This extended range enables reliable deployment in engine compartments, transmission control units, and other under-hood locations where ambient temperatures exceed 125°C.
Does AD8418AWHRZ-RL support bidirectional current sensing out of the box?
Yes, AD8418AWHRZ-RL natively supports bidirectional operation. By configuring VREF1 and VREF2 - for example, tying VREF1 to VS and VREF2 to GND - the output centers at VS/2, enabling symmetric positive/negative current measurement across the shunt resistor without external circuitry.
How does the FMEA-tolerant pinout of AD8418AWHRZ-RL improve system reliability?
The 10-lead MSOP pinout of AD8418AWHRZ-RL inserts NC pins between −IN/GND and +IN/VREF1. This physical isolation prevents single-point PCB trace shorts from causing output saturation or latch-up, satisfying ISO 26262 ASIL-B fault-tolerance requirements in automotive safety-critical designs.
Can AD8418AWHRZ-RL reject fast PWM common-mode transients commonly found in motor drives?
Yes, AD8418AWHRZ-RL incorporates patented circuitry and integrated EMI filters to maintain accuracy with common-mode dV/dt rates exceeding 1 V/ns. This allows stable current measurement during rapid MOSFET/IGBT switching in H-bridge and 3-phase inverter topologies without signal corruption.
What is the maximum continuous common-mode input voltage for AD8418AWHRZ-RL?
AD8418AWHRZ-RL supports −2 V to +70 V continuous common-mode input voltage. It also survives −3 V to +80 V for transient conditions, making it suitable for 12 V, 24 V, and 48 V automotive battery systems with load-dump and jump-start voltage spikes.
AD8418AWHRZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 250 kHz
- Current - Input Bias:
- 130 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 4.1mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8418AWHRZ-RL FAQ
1.How can I place an order for AD8418AWHRZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8418AWHRZ-RL 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 AD8418AWHRZ-RL reliable?
The price and inventory of AD8418AWHRZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8418AWHRZ-RL is usually 5 days.
3.What payment methods are accepted for AD8418AWHRZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8418AWHRZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8418AWHRZ-RL?
AD8418AWHRZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8418AWHRZ-RL 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 AD8418AWHRZ-RL?
For technical support, including AD8418AWHRZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8418AWHRZ-RL requirements.
6.How does Aetrix verify that AD8418AWHRZ-RL is sourced from the original manufacturer or authorized distributors?
All AD8418AWHRZ-RL 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 AD8418AWHRZ-RL meets industry standards.
7.What is the process for return or replacement of AD8418AWHRZ-RL?
All AD8418AWHRZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8418AWHRZ-RL, 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 AD8418AWHRZ-RL part is unused and in its original packaging.
Return procedure for AD8418AWHRZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8418AWHRZ-RL Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
