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Analog Devices Inc. AD8417WHRMZ
- Part No.:
- AD8417WHRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8417WHRMZ.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:209
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Product details
Overview
AD8417WHRMZ 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 60 V/V fixed gain, ±400 µV max input offset over −40°C to +150°C, −2 V to +70 V continuous common-mode input range, and 250 kHz bandwidth - enabling accurate real-time current monitoring under PWM-rich conditions.
For engineers reviewing the AD8417WHRMZ datasheet, AD8417WHRMZ pinout, AD8417WHRMZ application, or AD8417WHRMZ equivalent, this page provides verified technical context, AEC-Q100-qualified operating limits, FMEA-tolerant 10-lead MSOP package details, and validated alternatives for motor control, solenoid diagnostics, and power management designs requiring stable high-voltage current sensing.
Technical Context
The AD8417WHRMZ implements a patented zero-drift difference amplifier architecture (U.S. Patent 8,624,668 B2) that maintains <0.4 µV/°C offset drift while sustaining 250 kHz bandwidth - eliminating trade-offs between precision and speed in PWM-noise environments. Its input stage rejects fast common-mode transients up to 1 V/ns, enabling reliable operation with switching nodes in H-bridge and 3-phase inverter topologies.
It supports configurable unidirectional or bidirectional output via dual reference inputs (VREF1/VREF2), allowing ratiometric mid-scale offset (e.g., VS/2) without external components. The device integrates EMI filters and is qualified to AEC-Q100 Grade 0 (−40°C to +150°C), confirming suitability for under-hood automotive applications where thermal stability and fault resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 60 V/V fixed - enables direct interface with 12-bit+ ADCs using typical 1–5 mΩ shunts for ±50 A full-scale measurement. |
| Input Offset Voltage (max) | ±400 µV over −40°C to +150°C - ensures ≤±6.7 mV output error at 60× gain, critical for low-current diagnostic accuracy. |
| Common-Mode Range | −2 V to +70 V continuous - supports high-side sensing across 12 V/24 V/48 V battery systems with load-dump tolerance. |
| Bandwidth | 250 kHz - captures fast current transients in motor commutation and PWM-controlled solenoids without phase lag. |
| CMRR | 86 dB (dc to 10 kHz) - suppresses noise coupling from adjacent high-power traces in compact PCB layouts. |
| Supply Range | 2.7 V to 5.5 V - compatible with standard automotive 3.3 V or 5 V logic rails and allows direct connection to microcontroller ADC references. |
| Quiescent Current | 4.2 mA at +150°C - enables thermally constrained placement near power stages without excessive self-heating. |
Pinout & Package
AD8417WHRMZ is housed in a 10-lead MSOP package (RM-10) with FMEA-optimized pin spacing. This variant inserts NC pins between sensitive terminals (−IN/GND and +IN/VREF1) to prevent catastrophic failure from adjacent trace shorts - a requirement for ISO 26262-compliant automotive designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative Input | Connects to shunt resistor low-side; accepts −2 V to +70 V common-mode voltage during bidirectional sensing. |
| 2 (NC) | No Connect | Isolation barrier - prevents short-induced fault propagation between −IN and GND in case of PCB defect. |
| 3 (GND) | Ground Reference | System ground return; not tied to shunt - enables true high-side sensing with floating inputs. |
| 4 (VREF2) | Reference Input 2 | Configures output offset: tied to GND/VS/external ref to set unidirectional or bidirectional zero-current output level. |
| 5 (NC) | No Connect | Isolation barrier - prevents short-induced fault propagation between VREF2 and OUT. |
| 6 (OUT) | Analog Output | Buffered 60× amplified shunt voltage; drives 25 kΩ loads with 2 Ω output impedance and rail-to-rail swing. |
| 7 (VS) | Positive Supply | 2.7 V–5.5 V single supply; powers internal amplifiers and EMI filters; supplies reference divider network. |
| 8 (VREF1) | Reference Input 1 | Paired with VREF2; identical function - allows ratiometric splitting (e.g., VS/2) for mid-scale bidirectional offset. |
| 9 (NC) | No Connect | Isolation barrier - prevents short-induced fault propagation between VREF1 and +IN. |
| 10 (+IN) | Positive Input | Connects to shunt resistor high-side; differential input with −IN defines sensed current polarity and magnitude. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated operation from −40°C to +150°C - meets under-hood temperature requirements for engine control and transmission modules. |
| FMEA-optimized 10-lead MSOP pinout | NC pins isolate −IN/GND and +IN/VREF1 - enables conditional fault survival per ISO 26262 ASIL-B system-level analysis. |
| Patented PWM rejection architecture | Eliminates errors from 1 V/ns common-mode edges - ensures stable output during IGBT/MOSFET switching in motor inverters. |
| Ratiometric output offset adjustment | VREF1/VREF2 divider sets output at VS/2 with ±0.2% accuracy - removes need for precision external references in bidirectional designs. |
| Integrated EMI filters | On-chip RC networks suppress RF interference from nearby switching power supplies - reduces need for external filtering components. |
Applications
| Motor Control | Solenoid Control |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase BLDC motor drives with space-vector PWM modulation. IC Role / Device Role / Timing Role: High-side current sense amplifier measuring shunt voltage across each inverter leg with 250 kHz bandwidth and <1 µs overload recovery. Use Value: Enables precise field-oriented control (FOC) and overcurrent shutdown within 10 µs, preventing IGBT destruction during short-circuit events. | Use Scenario: Diagnostic current monitoring for 12 V automotive fuel injectors with high-side switch topology. IC Role / Device Role / Timing Role: Bidirectional amplifier detecting both energizing current and recirculation current through a single shunt, referenced to battery rail. Use Value: Identifies open-circuit, short-to-ground, and stuck-on faults by analyzing current waveform asymmetry across on/off cycles. |
| Power Management | Diagnostic Protection |
Use Scenario: Input current supervision in 48 V mild-hybrid DC/DC converters with synchronous rectification. IC Role / Device Role / Timing Role: Low-drift current sensor interfacing to MCU ADC for real-time efficiency optimization and thermal derating. Use Value: Maintains ±0.5% current measurement accuracy over full temperature range, enabling adaptive duty-cycle control to limit MOSFET junction temperature. | Use Scenario: Fault-tolerant current monitoring in electric power steering (EPS) assist motor drivers. IC Role / Device Role / Timing Role: AEC-Q100-qualified amplifier with FMEA pinout providing redundant current feedback to dual-core safety MCU. Use Value: Survives adjacent-pin shorts per Table 6 in datasheet, ensuring continued diagnostic capability even after PCB manufacturing defects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8418ARZ | 20 V/V gain, ±150 µV max offset, −40°C to +125°C rating, 8-lead SOIC_N package | Lower gain requires larger shunt for same dynamic range; limited to under-hood ambient temperatures only | Select when cost-sensitive industrial designs require lower gain and do not need +150°C operation or FMEA pinout. |
| MAX40056AUB+ | 60 V/V gain, ±150 µV max offset, −40°C to +125°C, integrated overcurrent comparator with 100 ns response | Includes hardware fast-shutdown output but lacks ratiometric VREF adjustment and AEC-Q100 Grade 0 qualification | Select when system-level overcurrent protection must be implemented in analog domain without MCU intervention. |
Compared with AD8417WHRMZ, AD8418ARZ offers tighter offset but sacrifices temperature range and fault resilience, while MAX40056AUB+ adds comparator functionality at the cost of automotive qualification and flexible offset configuration - making AD8417WHRMZ the sole choice for AEC-Q100 Grade 0 bidirectional sensing with FMEA compliance.
Availability
AD8417WHRMZ is available at Aetrix Electronics and suitable for motor control, solenoid diagnostics, and power management applications requiring stable component supply across extended temperature ranges and automotive-grade reliability.
Supply support for AD8417WHRMZ 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 automotive, industrial, communications, and healthcare markets.
The AD8417WHRMZ belongs to Analog Devices' precision current sensing amplifier product line, engineered specifically for AEC-Q100-qualified automotive subsystems demanding zero-drift accuracy, PWM noise immunity, and fault-tolerant packaging in high-voltage motor and actuator control.
FAQ
What is the maximum continuous common-mode voltage supported by the AD8417WHRMZ?
The AD8417WHRMZ supports a continuous common-mode input voltage range of −2 V to +70 V. This specification is validated across its full operating temperature range of −40°C to +150°C and enables reliable high-side current sensing in 12 V, 24 V, and 48 V automotive battery systems - including transient conditions such as load dump. The device also survives −3 V to +80 V common-mode voltage for short durations, per Absolute Maximum Ratings.
Does the AD8417WHRMZ require external components for bidirectional current measurement?
No, the AD8417WHRMZ does not require external components for basic bidirectional operation. By connecting VREF1 to VS and VREF2 to GND, the device automatically configures a ratiometric mid-scale output offset (VS/2) - enabling symmetric positive/negative current measurement with no external resistors or references. This feature is explicitly documented in the "Splitting the Supply" section of the Rev. E datasheet and leverages internal 100 kΩ reference resistors.
How does the AD8417WHRMZ achieve immunity to PWM noise in motor control applications?
The AD8417WHRMZ achieves PWM noise immunity through a patented circuit architecture (U.S. Patent 8,624,668 B2) that actively cancels fast common-mode transients up to 1 V/ns. Combined with on-chip EMI filters and 86 dB CMRR from dc to 10 kHz, this design prevents output corruption during IGBT or MOSFET switching events - a capability confirmed in Figure 19 (common-mode step response) and the Theory of Operation section of the AD8417WHRMZ datasheet.
What is the purpose of the NC pins in the AD8417WHRMZ 10-lead MSOP package?
The NC pins in the AD8417WHRMZ 10-lead MSOP package serve a functional FMEA (Failure Mode and Effects Analysis) role - they physically isolate high-voltage input terminals (−IN and +IN) from adjacent low-voltage pins (GND and VREF1). As detailed in Table 6 of the datasheet, this layout ensures that adjacent-pin shorts (e.g., −IN-to-GND or +IN-to-VREF1) do not cause catastrophic failure, enabling conditional fault survival required for ASIL-B automotive safety goals.
Is the AD8417WHRMZ pin-compatible with other variants in the AD8417 family?
No, the AD8417WHRMZ is not pin-compatible with 8-lead variants (e.g., AD8417WB or AD8417WH). It uses a unique 10-lead MSOP (RM-10) footprint with NC pins inserted at positions 2, 5, and 9 - a deliberate FMEA enhancement absent in the 8-lead SOIC_N or MSOP packages. PCB layout must use the outline dimensions in Figure 39 of the Rev. E datasheet; migration from 8-lead versions requires board redesign.
AD8417WHRMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- 200 µV
- 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-MSOP
AD8417WHRMZ FAQ
1.How can I place an order for AD8417WHRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8417WHRMZ 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 AD8417WHRMZ reliable?
The price and inventory of AD8417WHRMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8417WHRMZ is usually 5 days.
3.What payment methods are accepted for AD8417WHRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8417WHRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8417WHRMZ?
AD8417WHRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8417WHRMZ 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 AD8417WHRMZ?
For technical support, including AD8417WHRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8417WHRMZ requirements.
6.How does Aetrix verify that AD8417WHRMZ is sourced from the original manufacturer or authorized distributors?
All AD8417WHRMZ 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 AD8417WHRMZ meets industry standards.
7.What is the process for return or replacement of AD8417WHRMZ?
All AD8417WHRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8417WHRMZ, 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 AD8417WHRMZ part is unused and in its original packaging.
Return procedure for AD8417WHRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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