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Analog Devices Inc. AD8205WYRZ-R7
- Part No.:
- AD8205WYRZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8205WYRZ-R7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,019
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Product details
Overview
AD8205WYRZ-R7 from Analog Devices is an automotive-qualified single-supply difference amplifier designed for high-side current sensing in 42 V automotive systems. It features a fixed gain of 50 V/V, −2 V to +65 V input common-mode voltage range, ±4.5 mV maximum input offset over temperature, and operates from −40°C to +125°C in an 8-lead SOIC package. It enables precise bidirectional or unidirectional shunt-based current measurement in motor and transmission controls.
For engineers reviewing the AD8205WYRZ-R7 datasheet, AD8205WYRZ-R7 pinout, AD8205WYRZ-R7 application, or AD8205WYRZ-R7 equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade performance parameters, and real-world implementation context for high-side current sensing in engine management and H-bridge motor control.
Technical Context
The AD8205WYRZ-R7 employs a two-stage amplifier architecture with precision laser-trimmed resistor networks to achieve >78 dB CMRR from dc to 20 kHz. Its input attenuation ratio (1/16.7) and first-stage differential amplification (26×) combine with second-stage single-ended gain (32.15×) to deliver exact 50 V/V total gain.
It supports flexible output offset configuration via VREF1 and VREF2 pins-enabling ground-referenced, V+-referenced, or ratiometric mid-scale (e.g., 2.5 V at 5 V supply) operation without external components. The Class A output stage uses a PNP pull-up transistor and 300 µA current-sink pull-down for rail-to-rail compatible drive into 25 kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V, fixed and trimmed to ±1.2% accuracy over −40°C to +125°C-ensures stable current-to-voltage scaling across automotive thermal cycles. |
| Input Common-Mode Range | −2 V to +65 V continuous-supports direct connection to 42 V battery rails with margin for transients and negative spikes during load dump. |
| Input Offset (RTI) | ±4.5 mV max over full temperature range-limits worst-case current measurement error to ≤90 µA on a 20 mΩ shunt. |
| CMRR | 76 dB min (dc–20 kHz)-rejects battery ripple and PWM switching noise in high-noise motor control environments. |
| Small-Signal Bandwidth | 50 kHz-adequate for closed-loop current control in diesel injection solenoids and transmission clutch actuators. |
| Supply Voltage Range | 4.5 V to 5.5 V-compatible with standard automotive 5 V LDO supplies; absolute max 12.5 V prevents latch-up during load dump. |
| Quiescent Current | 2.2 mA max over temperature-minimizes power loss in always-on vehicle subsystems. |
Pinout & Package
AD8205WYRZ-R7 is housed in an 8-lead SOIC_N (JEDEC MS-012-AA, R-8) package, 4.9 mm × 3.9 mm × 1.75 mm, RoHS-compliant and qualified for automotive use.
| 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; not isolated-must be tied to PCB ground plane. |
| 3 (VREF2) | Reference voltage input | Used with VREF1 to set output offset; tied to GND, V+, or external reference to configure unipolar/bipolar operation. |
| 4 (NC) | No connect | Internally unused; must remain floating-no PCB trace or pad required. |
| 5 (OUT) | Analog output | Single-ended voltage output (0.05 V–4.8 V at 5 V supply); drives ≥25 kΩ loads with <2 Ω output resistance. |
| 6 (V+) | Positive supply | Accepts 4.5 V–5.5 V single supply; backside potential tied to V+ per die construction. |
| 7 (VREF1) | Reference voltage input | Dual with VREF2; identical function-no functional distinction between VREF1 and VREF2 per datasheet. |
| 8 (+IN) | Non-inverting input | Connects to high side of current shunt; completes differential pair with −IN for accurate shunt voltage amplification. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current sensing | Configurable output offset (0.05 V–4.8 V) enables true bipolar measurement-e.g., ±40 mV input yields 0.5 V to 4.5 V output at 5 V supply. |
| Automotive qualification | W-grade rating (−40°C to +125°C) with controlled manufacturing, AEC-Q100 stress testing, and automotive reliability reporting support. |
| Ratiometric offset adjustment | VREF1/VREF2 divider creates supply-proportional mid-scale (e.g., 2.5 V @ 5 V, 2.75 V @ 5.5 V), eliminating need for stable external reference. |
| High common-mode survival | Withstands −25 V to +75 V continuous input-survives ISO 7637-2 pulse 5a (load dump) and reverse-battery conditions. |
| Low drift performance | 15 µV/°C offset drift and 30 ppm/°C gain drift minimize calibration burden and enable one-time factory trim for life-of-vehicle accuracy. |
Applications
| Motor Control | Transmission Control |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 12 V/42 V brushed or BLDC motor drives using H-bridge topology. IC Role / Device Role / Timing Role: High-side difference amplifier placed across motor shunt to reject noisy ground potentials and measure bidirectional current during commutation. Use Value: Enables accurate torque control and overcurrent protection without ground-referenced op-amp errors caused by PCB ground bounce. |
Use Scenario: Solenoid current feedback in hydraulic automatic transmission valve bodies operating from 42 V battery rails. IC Role / Device Role / Timing Role: Amplifies mV-level shunt voltage under fast-switching PWM (1–20 kHz), surviving −25 V to +75 V common-mode transients. Use Value: Supports closed-loop solenoid position control with <±1% full-scale error across −40°C to +125°C ambient. |
| Diesel Injection Control | Engine Management |
|
Use Scenario: High-side current sensing for piezoelectric or electromagnetic fuel injectors in modern diesel engines. IC Role / Device Role / Timing Role: Measures injector coil current during short-duration (0.1–2 ms), high-dV/dt switching events with minimal propagation delay. Use Value: Provides precise fuel quantity control via real-time current integration, critical for meeting Euro 6/VI emissions standards. |
Use Scenario: Throttle actuator, turbocharger VGT, or EGR valve current monitoring in engine control units (ECUs). IC Role / Device Role / Timing Role: Interfaces directly to 42 V battery rail and microcontroller ADC; supports diagnostic open/short detection via configurable output polarity. Use Value: Enables ASIL-B compliant functional safety monitoring with guaranteed offset stability over 15-year vehicle lifetime. |
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 |
|---|---|---|---|
| MAX4080TASA+ | Higher gain accuracy (±0.5% vs. ±1.2%), but narrower common-mode range (−0.1 V to +76 V) and no automotive qualification. | Limited to industrial/commercial designs; lacks AEC-Q100 validation and extended temperature support. | Select when highest initial gain accuracy is prioritized over automotive compliance and transient robustness. |
| INA240A1QDRQ1 | Wider common-mode range (−4 V to +80 V), lower offset drift (2.5 µV/°C), but higher quiescent current (2.4 mA vs. 2.2 mA) and different pinout. | Requires PCB layout change; supports higher voltage systems (e.g., 48 V mild-hybrid) but less optimized for 42 V legacy platforms. | Choose for next-gen 48 V architectures or where ultra-low drift dominates thermal error budget. |
Compared with MAX4080TASA+ and INA240A1QDRQ1, the AD8205WYRZ-R7 offers the optimal balance of automotive qualification, 42 V system compatibility, proven field reliability in engine/transmission modules, and minimal design change requirements for existing SOIC-N layouts.
Availability
AD8205WYRZ-R7 is available at Aetrix Electronics and suitable for motor control, transmission control, and diesel injection control requiring stable component supply across automotive production lifecycles.
Supply support for AD8205WYRZ-R7 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 AD8205 product line delivers precision current sensing ICs optimized for harsh automotive environments, with focus on high common-mode rejection, wide temperature operation, and integrated offset configurability for engine, transmission, and chassis control systems.
FAQ
What is the guaranteed operating temperature range for AD8205WYRZ-R7?
The AD8205WYRZ-R7 is rated for operation from −40°C to +125°C, meeting automotive W-grade specifications. This range is validated across all key parameters-including gain accuracy, offset drift, and CMRR-as documented in Table 1 of the Rev. D datasheet. The "W" suffix explicitly denotes automotive qualification, and the "Y" grade confirms the −40°C to +125°C thermal envelope. No derating is required within this span.
Can AD8205WYRZ-R7 be used for bidirectional current sensing in an H-bridge motor driver?
Yes, AD8205WYRZ-R7 supports true bidirectional current sensing via its configurable output offset. By connecting VREF1 to V+ and VREF2 to GND, the output centers at V+/2 (e.g., 2.5 V at 5 V supply). A ±40 mV differential input then produces 0.5 V to 4.5 V output-enabling full-range measurement of forward/reverse motor current without external level-shifting circuitry. This configuration is explicitly validated in Figure 17 and Table 6 of the datasheet.
What is the maximum continuous common-mode voltage the AD8205WYRZ-R7 can withstand?
The AD8205WYRZ-R7 supports a continuous input common-mode voltage range of −2 V to +65 V, as specified in the General Description and Table 1. Its survival rating extends to −25 V to +75 V (Table 2), making it suitable for 42 V automotive systems with margin for load dump transients and negative spikes. This exceeds ISO 16750-2 requirements for Category C (12 V) and Category D (42 V) vehicles.
How does the AD8205WYRZ-R7 achieve its 50 V/V gain without external resistors?
The AD8205WYRZ-R7 integrates a precision laser-trimmed resistor network and two-stage amplifier architecture to deliver fixed 50 V/V gain. Input attenuation (1/16.7), first-stage differential gain (26×), and second-stage single-ended gain (32.15×) multiply to exactly 50. Resistor ratios are trimmed to better than 0.01%, ensuring ±1.2% gain accuracy over temperature without external components-per Theory of Operation (Page 8) and Gain specification (Table 1).
Is AD8205WYRZ-R7 pin-compatible with other members of the AD8205 family?
Yes, AD8205WYRZ-R7 shares identical 8-lead SOIC_N (R-8) pinout and footprint with all AD8205 variants-including AD8205YRZ-R7 and AD8205WHRZ-R7-as confirmed in the Ordering Guide (Page 12) and Pin Configuration diagram (Figure 3). The only differences are grade (W vs. Y vs. H) and packaging (R7 tape-and-reel), not electrical or mechanical interface. No PCB redesign is needed when substituting within the same package option.
AD8205WYRZ-R7 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:
- 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:
- 2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8205WYRZ-R7 FAQ
1.How can I place an order for AD8205WYRZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8205WYRZ-R7 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 AD8205WYRZ-R7 reliable?
The price and inventory of AD8205WYRZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8205WYRZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8205WYRZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8205WYRZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8205WYRZ-R7?
AD8205WYRZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8205WYRZ-R7 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 AD8205WYRZ-R7?
For technical support, including AD8205WYRZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8205WYRZ-R7 requirements.
6.How does Aetrix verify that AD8205WYRZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8205WYRZ-R7 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 AD8205WYRZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8205WYRZ-R7?
All AD8205WYRZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8205WYRZ-R7, 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 AD8205WYRZ-R7 part is unused and in its original packaging.
Return procedure for AD8205WYRZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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