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Analog Devices Inc. AD8418AWBRMZ-10RL
- Part No.:
- AD8418AWBRMZ-10RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8418AWBRMZ-10RL.pdf
- Description:
- HIGH COMMON MODE CUR SENSE, -3V
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
AD8418AWBRMZ-10RL from Analog Devices is a bidirectional, zero-drift current sense amplifier with 20 V/V fixed gain, ±200 μV max input offset over −40°C to +125°C, −2 V to +70 V continuous common-mode input range, and integrated EMI filters-designed for high-side current monitoring in automotive motor control systems.
For engineers reviewing the AD8418AWBRMZ-10RL datasheet, AD8418AWBRMZ-10RL pinout, AD8418AWBRMZ-10RL application, or AD8418AWBRMZ-10RL equivalent, this page delivers verified specifications, FMEA-tolerant 10-lead MSOP package details, bidirectional operation support, PWM-resistant common-mode rejection, and automotive-grade AEC-Q100 qualification-critical for solenoid diagnostics and H-bridge current feedback design.
Technical Context
The AD8418AWBRMZ-10RL implements a zero-drift chopper-stabilized architecture enabling 0.1 μV/°C typical offset drift and <400 nV/°C max drift across −40°C to +125°C. Its differential input stage rejects fast PWM common-mode transients up to 1 V/ns while maintaining ≥90 dB DC CMRR and 86 dB CMRR at 10 kHz.
It supports flexible output offset configuration via dual reference pins (VREF1/VREF2), enabling ground-referenced, supply-referenced, external-referenced, or ratiometric mid-scale (VS/2) outputs-all without external components. The device operates from 2.7 V to 5.5 V and delivers 250 kHz small-signal bandwidth with 1 V/μs slew rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V fixed-enables direct scaling of shunt voltage to measurable analog output without gain-setting resistors. |
| Input Offset Voltage (max) | ±200 μV over full temperature range-ensures ≤10 mV total error at 50 mV shunt drop, critical for low-current accuracy. |
| Common-Mode Range | −2 V to +70 V continuous-supports high-side sensing in 12 V/24 V automotive systems with battery transients and inductive kickback. |
| CMRR (min) | 90 dB at DC-rejects supply noise and ground bounce in noisy motor/solenoid drive environments. |
| Bandwidth | 250 kHz typical-captures fast current transients in PWM-driven H-bridges and 3-phase inverters. |
| Supply Range | 2.7 V to 5.5 V-compatible with standard 3.3 V and 5 V microcontroller ADC references. |
| Quiescent Current | 4.1 mA at −40°C to +125°C-enables always-on current monitoring without excessive power penalty. |
Pinout & Package
AD8418AWBRMZ-10RL is housed in a RoHS-compliant, lead-free 10-lead MSOP package (3.0 mm × 3.0 mm, 0.5 mm pitch) engineered for FMEA compliance with strategically placed NC pins to isolate high-voltage inputs from adjacent signal/power terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN | Negative input terminal for differential shunt voltage sensing; rated for −2 V to +70 V common-mode. |
| 2, 5, 9 | NC | No-connect pins inserted for fault isolation-prevent short-circuit propagation between −IN/GND and +IN/VREF1 in PCB defects. |
| 3 | GND | Analog ground reference; internal ESD diode provides limited fault path if open. |
| 4 | VREF2 | Reference input pin; used with VREF1 to set output offset (e.g., tie to GND for ground-referenced unidirectional mode). |
| 6 | OUT | Buffered single-ended output; rail-to-rail swing (0.032 V to VS − 0.032 V into 25 kΩ) drives ADC inputs directly. |
| 7 | VS | Positive supply input; accepts 2.7 V to 5.5 V; internal ESD diode enables limited backup powering if open. |
| 8 | VREF1 | Reference input pin; functionally identical to VREF2; used together for ratiometric mid-scale (VS/2) or external reference biasing. |
| 10 | +IN | Positive input terminal for differential shunt voltage sensing; symmetric with −IN for bidirectional current polarity detection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation-meets automotive reliability and lifetime requirements for engine bay and powertrain applications. |
| FMEA-tolerant 10-lead MSOP pinout | NC pins between −IN/GND and +IN/VREF1 prevent catastrophic failure from adjacent trace shorts-enables ISO 26262 ASIL-B system compliance. |
| EMI filtering on inputs | Integrated RC filters suppress RF interference from switching nodes-eliminates need for external ferrites or capacitors in motor drive layouts. |
| Bidirectional current measurement | Output centered at VS/2 by default-supports equal positive/negative current ranges (e.g., ±50 A) without external level-shifting circuitry. |
| PWM common-mode rejection | Stable operation with >1 V/ns common-mode dV/dt-maintains accuracy during gate driver switching edges in IGBT/MOSFET half-bridges. |
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 for field-oriented control (FOC) loops. Use Value: 250 kHz bandwidth captures instantaneous current at every PWM cycle; ±200 μV offset ensures <0.5% gain error at 50 mV shunt drop-enabling precise torque regulation. |
Use Scenario: Diagnostic current monitoring of 12 V automotive solenoids (e.g., transmission shift actuators) with low-side switch topology. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier detecting both activation current and recirculation current during switch-off. Use Value: −2 V to +70 V common-mode range withstands inductive flyback clamping; FMEA pinout prevents latch-up during PCB solder bridging faults. |
| H-Bridge Motor Control | Power Management |
|
Use Scenario: Center-leg current sensing in dual-H-bridge configurations for bidirectional DC motor control (e.g., power seat or window lift). IC Role / Device Role / Timing Role: Precision current monitor placed between H-bridge legs to measure net motor current regardless of direction. Use Value: Zero-drift architecture maintains <10 mV total offset error across cabin temperature extremes-enabling accurate stall detection and thermal derating. |
Use Scenario: Overcurrent protection and load current telemetry in 48 V mild-hybrid vehicle DC-DC converters and battery disconnect units. IC Role / Device Role / Timing Role: High-voltage current sense front-end feeding safety MCU for real-time fault response and energy accounting. Use Value: AEC-Q100 qualification and 80 V survival rating ensure robustness against load dump transients; 4.1 mA quiescent current supports always-on monitoring. |
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 | 60 V/V gain, ±100 μV max offset, same 10-lead MSOP package and AEC-Q100 rating. | Better resolution for low-shunt designs (<1 mΩ), but lower dynamic range for high-current sensing. | Select AD8417ARWZ when higher gain is needed to maximize ADC utilization with sub-50 mV shunt drops. |
| INA240A1QDRQ1 | 80 V/V gain, −4 V to +80 V common-mode, 120 kHz bandwidth, SOIC-8 package. | Wider common-mode range and automotive qualification, but lower bandwidth and no FMEA-optimized pinout. | Choose INA240A1QDRQ1 for ultra-high-side sensing (e.g., 48 V bus) where 250 kHz bandwidth is not required. |
Compared with AD8418AWBRMZ-10RL, AD8417ARWZ offers higher gain for improved low-current SNR but reduced headroom at high currents, while INA240A1QDRQ1 extends common-mode capability at the cost of bandwidth and FMEA resilience-making AD8418AWBRMZ-10RL optimal for balanced performance in 12 V/24 V motor control with functional safety constraints.
Availability
AD8418AWBRMZ-10RL is available at Aetrix Electronics and suitable for automotive motor control, solenoid diagnostics, H-bridge current feedback, and 48 V power management systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for AD8418AWBRMZ-10RL 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 AD8418A product line delivers precision current sensing for safety-critical automotive subsystems, combining zero-drift accuracy, PWM immunity, and FMEA-aware packaging to meet ASIL-B functional safety requirements in motor and solenoid control.
FAQ
What is the operating temperature range for AD8418AWBRMZ-10RL?
The AD8418AWBRMZ-10RL is specified for operation from −40°C to +125°C and is AEC-Q100 qualified for automotive use. Its zero-drift architecture ensures ±200 μV maximum input offset voltage across this full range, making it suitable for under-hood and powertrain applications where thermal stability is critical. The AD8418AWBRMZ-10RL maintains 250 kHz bandwidth and 90 dB CMRR throughout this interval.
Does AD8418AWBRMZ-10RL support bidirectional current sensing?
Yes, AD8418AWBRMZ-10RL natively supports bidirectional current sensing via its dual reference inputs (VREF1 and VREF2). When configured with VREF1 tied to VS and VREF2 tied to GND, the output centers at VS/2-enabling symmetrical positive and negative current measurement (e.g., ±50 A) without external op amps or level shifters. This configuration is explicitly validated in the AD8418AWBRMZ-10RL datasheet for H-bridge and 3-phase motor applications.
What package type does AD8418AWBRMZ-10RL use, and why is it FMEA-tolerant?
AD8418AWBRMZ-10RL uses a 10-lead MSOP package with NC pins positioned between −IN/GND and +IN/VREF1. This layout isolates high-voltage inputs (−2 V to +70 V) from adjacent low-voltage terminals, preventing single-point PCB faults (e.g., solder bridges) from causing catastrophic output saturation or latch-up. The AD8418AWBRMZ-10RL's FMEA tolerance is documented in Tables 6 and 7 of its Rev. E datasheet for automotive functional safety compliance.
Can AD8418AWBRMZ-10RL reject fast PWM common-mode transients?
Yes, AD8418AWBRMZ-10RL incorporates patented circuitry and integrated EMI filters to reject PWM common-mode voltages changing at rates exceeding 1 V/ns. It maintains ≥90 dB CMRR at DC and ≥86 dB up to 10 kHz, enabling accurate current measurement in noisy switching environments like IGBT gate drivers and MOSFET half-bridges-without external filtering. This capability is confirmed in Figure 5 (CMRR vs. Frequency) and Theory of Operation section of the AD8418AWBRMZ-10RL datasheet.
What is the gain error specification for AD8418AWBRMZ-10RL over temperature?
The AD8418AWBRMZ-10RL has a maximum gain error of ±0.15% over its full −40°C to +125°C operating range, with gain drift of ±5 ppm/°C. This tight tolerance ensures minimal scaling error across temperature-critical for closed-loop motor control where consistent current-to-voltage conversion directly impacts torque accuracy. The AD8418AWBRMZ-10RL's gain stability is verified in Table 2 and Figure 6 (Gain Error vs. Temperature) of its official datasheet.
AD8418AWBRMZ-10RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm 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:
- 100 µV
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
AD8418AWBRMZ-10RL FAQ
1.How can I place an order for AD8418AWBRMZ-10RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8418AWBRMZ-10RL 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 AD8418AWBRMZ-10RL reliable?
The price and inventory of AD8418AWBRMZ-10RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8418AWBRMZ-10RL is usually 5 days.
3.What payment methods are accepted for AD8418AWBRMZ-10RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8418AWBRMZ-10RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8418AWBRMZ-10RL?
AD8418AWBRMZ-10RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8418AWBRMZ-10RL 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 AD8418AWBRMZ-10RL?
For technical support, including AD8418AWBRMZ-10RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8418AWBRMZ-10RL requirements.
6.How does Aetrix verify that AD8418AWBRMZ-10RL is sourced from the original manufacturer or authorized distributors?
All AD8418AWBRMZ-10RL 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 AD8418AWBRMZ-10RL meets industry standards.
7.What is the process for return or replacement of AD8418AWBRMZ-10RL?
All AD8418AWBRMZ-10RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8418AWBRMZ-10RL, 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 AD8418AWBRMZ-10RL part is unused and in its original packaging.
Return procedure for AD8418AWBRMZ-10RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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