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Analog Devices Inc. AD8205WHRZ
- Part No.:
- AD8205WHRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8205WHRZ.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,903
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Product details
Overview
AD8205WHRZ from Analog Devices is a single-supply, high-voltage difference amplifier designed for precision high-side current sensing in automotive powertrain systems. It features 50 V/V fixed gain, −2 V to +65 V operating common-mode input range, ±4.5 mV max input offset over temperature, 80 dB CMRR (dc to 20 kHz), and is qualified for −40°C to +150°C operation. It enables accurate bidirectional current measurement across shunt resistors in diesel injection and transmission control circuits.
For engineers reviewing the AD8205WHRZ datasheet, AD8205WHRZ pinout, AD8205WHRZ application, or AD8205WHRZ equivalent, this page delivers verified specifications, SOIC-8 terminal mapping, automotive-grade thermal performance data, output offset configuration methods, and validated alternative options for high-common-mode current sensing designs.
Technical Context
The AD8205WHRZ employs a two-stage amplifier architecture with precision laser-trimmed resistor networks (matching <0.01%) to achieve >78 dB CMRR from dc to 20 kHz. Its input attenuation ratio of 1/16.7 enables safe operation with inputs extending 25 V beyond supply rails while maintaining rail-to-rail output swing.
It supports three output offset modes-ground-referenced, V+-referenced, and ratiometric mid-scale-via VREF1/VREF2 pins, enabling unidirectional or bidirectional current sensing without external components. The Class A output stage uses a PNP pull-up transistor and 300 µA current sink for stable drive into 25 kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed, ±1.2% accuracy over −40°C to +150°C - ensures predictable scaling of shunt voltage without calibration. |
| Common-Mode Input Range | −2 V to +65 V continuous - supports direct connection to 42 V automotive battery systems during transients and PWM switching. |
| Input Offset Drift | 15 µV/°C max - minimizes temperature-induced error in engine bay environments where ambient varies widely. |
| CMRR | 76 dB min (dc–20 kHz) - rejects noise from high-dv/dt switching nodes in solenoid drivers and H-bridge motor controls. |
| Output Voltage Range | 0.05 V to 4.8 V with 5 V supply - provides full dynamic range for ADC interfacing without level-shifting. |
| Supply Range | 4.5 V to 5.5 V - compatible with standard automotive 5 V LDOs and immune to brownout conditions down to 4.5 V. |
| Quiescent Current | 2.2 mA max at +150°C - enables low-power always-on monitoring in safety-critical vehicle subsystems. |
Pinout & Package
AD8205WHRZ is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm pitch, 5.00 mm × 3.95 mm body, and 1.75 mm maximum height. The package is RoHS-compliant and qualified for automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting input | Connects to low side of current shunt; accepts differential input up to ±50 mV with half-scale offset. |
| 2 (GND) | Analog ground reference | System ground return for internal bias and output stage; must be low-impedance path to minimize noise coupling. |
| 3 (VREF2) | Offset adjustment reference | Paired with VREF1 to set output DC level; tied to GND/V+/external reference to configure unipolar/bipolar operation. |
| 4 (NC) | No connect | Internally unused; must remain floating - no PCB trace or solder mask opening required. |
| 5 (OUT) | Differential-to-single-ended output | Delivers amplified, offset-adjustable signal; drives 25 kΩ load with 2 Ω output impedance. |
| 6 (V+) | Positive supply | Accepts 4.5 V–5.5 V single supply; backside potential tied to V+ for ESD robustness. |
| 7 (VREF1) | Offset adjustment reference | Functionally identical to VREF2; used jointly to generate ratiometric or fixed output offset. |
| 8 (+IN) | Non-inverting input | Connects to high side of current shunt; common-mode voltage tolerance enables direct battery rail sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current sensing capability | Configurable output offset (0.05–4.8 V) enables symmetric ±40 mV input range for H-bridge motor control feedback. |
| Laser-trimmed resistor network | 0.01% ratio matching ensures ≥78 dB CMRR stability across temperature and supply variation - critical for PWM noise immunity. |
| High common-mode survival rating | −25 V to +75 V continuous input withstand - protects against load dump, inductive kickback, and battery reversal in 12 V/42 V systems. |
| Automotive-grade temperature rating | −40°C to +150°C operation with controlled manufacturing - meets AEC-Q100 stress test requirements for powertrain ECUs. |
| Ratiometric output offset | VREF1/VREF2 tied across V+/GND yields mid-scale output proportional to supply - eliminates need for external voltage reference in cost-sensitive designs. |
Applications
| Diesel Injection Control | Transmission Control Unit |
|---|---|
Use Scenario: Monitoring solenoid coil current during high-speed PWM actuation in common-rail diesel injectors. IC Role / Device Role / Timing Role: High-side current sensor amplifying mV-level shunt voltage amid 42 V battery transients and 100 V inductive spikes. Use Value: Enables closed-loop current regulation with <±1.2% gain error over full temperature range, improving fuel metering accuracy and emissions compliance. |
Use Scenario: Measuring clutch pack engagement current in automatic transmission hydraulic control modules. IC Role / Device Role / Timing Role: Bidirectional difference amplifier providing real-time current feedback during gear shift transitions with rapid common-mode shifts. Use Value: Supports diagnostic detection of open/short circuits and stuck solenoids via zero-current baseline validation at +150°C under hood conditions. |
| Engine Management System | H-Bridge Motor Control |
Use Scenario: Sensing fuel pump or turbocharger VGT actuator current in engine control units exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Precision current monitor interfaced to 12-bit ADC, delivering stable output despite −2 V to +65 V common-mode swings during cranking and load dump. Use Value: Maintains <±4.5 mV input offset error across −40°C to +150°C, reducing calibration burden and enabling single-point factory trim. |
Use Scenario: Measuring bidirectional motor winding current in electric power steering (EPS) or active suspension H-bridges. IC Role / Device Role / Timing Role: Mid-bridge shunt amplifier with ratiometric output offset, rejecting ground bounce and supply ripple in noisy motor drive environments. Use Value: Delivers 80 dB CMRR up to 20 kHz to suppress PWM switching noise, enabling accurate torque estimation without additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8207WYRZ | Same SOIC-8 package, but 100 V/V gain and −4 V to +76 V common-mode range; offset drift 25 µV/°C. | Optimized for higher-gain, lower-current sensing (e.g., <10 A); less suitable for 50× scaling of typical 1–5 mΩ shunts. | Select AD8207WYRZ only when system requires >50× gain or extended −4 V common-mode for negative rail diagnostics. |
| INA240A1QDRQ1 | SOIC-8, 20 V/V gain, −4 V to +80 V common-mode, 10 µV/°C offset drift, integrated EMI filter; not AEC-Q100 H-grade rated. | Lower gain necessitates larger shunt resistance; superior drift but lacks +150°C qualification for under-hood placement. | Choose INA240A1QDRQ1 for non-under-hood applications requiring ultra-low drift, but verify thermal derating if ambient exceeds +125°C. |
Compared with AD8205WHRZ, AD8207WYRZ offers higher gain and wider common-mode range at the expense of increased offset drift, while INA240A1QDRQ1 provides better dc precision and EMI robustness but lacks the +150°C automotive qualification required for direct engine compartment mounting.
Availability
AD8205WHRZ is available at Aetrix Electronics and suitable for diesel injection control, transmission control units, engine management systems, and H-bridge motor control applications requiring stable component supply across automotive production lifecycles.
Supply support for AD8205WHRZ 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 AD8205WHRZ belongs to Analog Devices' automotive-qualified difference amplifier product line, engineered specifically for high-accuracy, high-common-mode current sensing in powertrain and chassis control modules operating up to +150°C.
FAQ
What is the maximum continuous common-mode voltage the AD8205WHRZ can withstand?
The AD8205WHRZ supports a continuous common-mode input voltage range of −2 V to +65 V. Its survival rating extends to −25 V to +75 V, making it suitable for 42 V automotive systems experiencing load dump, cranking, and inductive kickback events. This specification is guaranteed across the full −40°C to +150°C operating temperature range for the AD8205WHRZ.
How does the AD8205WHRZ achieve bidirectional current sensing?
The AD8205WHRZ achieves bidirectional current sensing by configuring its VREF1 and VREF2 pins to set the output offset at mid-scale (e.g., 2.5 V with 5 V supply). When the differential input is zero, the output rests at this midpoint; positive current produces an upward voltage swing, and negative current produces a downward swing. This mode is explicitly validated in the AD8205WHRZ datasheet for applications like H-bridge motor control.
Is the AD8205WHRZ pin-compatible with other members of the AD8205 family?
Yes, the AD8205WHRZ shares identical pinout and SOIC-8 (R-8) package dimensions with AD8205YRZ, AD8205WYRZ, and AD8205WHRZ-RL variants. All models use the same metallization diagram and terminal functions shown in Figure 3 of the AD8205 datasheet Rev. D, enabling drop-in replacement within the same grade temperature envelope.
What is the purpose of the NC pin on the AD8205WHRZ?
Pin 4 of the AD8205WHRZ is designated NC (No Connect) and is internally unused. It must remain unconnected on the PCB - no trace, pad, or solder mask opening should be assigned to this terminal. This isolation prevents parasitic coupling and ensures specified ESD performance and CMRR integrity as confirmed in the AD8205WHRZ pin function descriptions.
Does the AD8205WHRZ require external passive components for basic operation?
No, the AD8205WHRZ operates with only V+, GND, +IN, −IN, OUT, VREF1, and VREF2 connections. External components are optional: a single 0.1 µF bypass capacitor on V+ is recommended, and resistive dividers on VREF1/VREF2 are needed only for custom offset settings. The internal laser-trimmed resistors and bias circuitry eliminate the need for external gain-setting or trimming networks.
AD8205WHRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 50 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 2.2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 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
AD8205WHRZ FAQ
1.How can I place an order for AD8205WHRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8205WHRZ 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 AD8205WHRZ reliable?
The price and inventory of AD8205WHRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8205WHRZ is usually 5 days.
3.What payment methods are accepted for AD8205WHRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8205WHRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8205WHRZ?
AD8205WHRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8205WHRZ 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 AD8205WHRZ?
For technical support, including AD8205WHRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8205WHRZ requirements.
6.How does Aetrix verify that AD8205WHRZ is sourced from the original manufacturer or authorized distributors?
All AD8205WHRZ 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 AD8205WHRZ meets industry standards.
7.What is the process for return or replacement of AD8205WHRZ?
All AD8205WHRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8205WHRZ, 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 AD8205WHRZ part is unused and in its original packaging.
Return procedure for AD8205WHRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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