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Analog Devices Inc. AD8205YRZ
- Part No.:
- AD8205YRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8205YRZ.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:19,333
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Product details
Overview
AD8205YRZ from Analog Devices is a single-supply, high-voltage difference amplifier optimized for high-side current sensing in automotive power systems. It features 50 V/V fixed gain, −2 V to +65 V input common-mode voltage range, ±4.5 mV max input offset over temperature, 80 dB CMRR (dc to 20 kHz), and operates from −40°C to +125°C in an 8-lead SOIC package. It enables precise bidirectional current measurement in diesel injection controls and transmission control units.
For engineers reviewing the AD8205YRZ datasheet, AD8205YRZ pinout, AD8205YRZ application, or AD8205YRZ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade specifications, real-world use cases in motor and solenoid control, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The AD8205YRZ employs a dual-amplifier architecture with precision laser-trimmed resistor networks to achieve >78 dB CMRR across dc–20 kHz while rejecting rapidly changing common-mode voltages up to 65 V. Its input attenuators (1/16.7 ratio) scale high common-mode signals into the input range of the first stage (gain = 26), followed by a second-stage differential-to-single-ended conversion (gain = 32.15), yielding total gain of 50 V/V.
Output offset is programmable from 0.05 V to 4.8 V using VREF1 and VREF2 pins-supporting ground-referenced, V+-referenced, or ratiometric mid-scale (e.g., 2.5 V at 5 V supply) configurations. The Class A output stage uses a PNP pull-up transistor and 300 µA current-sink pull-down, enabling stable drive into 25 kΩ loads without phase reversal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed, ±1.2% accuracy over −40°C to +125°C - ensures consistent current-to-voltage scaling across full automotive temperature range. |
| Common-Mode Input Range | −2 V to +65 V continuous - supports direct connection to 42 V battery rails and handles transient spikes up to +75 V survival rating. |
| Input Offset Voltage (RTI) | ±4.5 mV max over temperature - limits worst-case current measurement error to ≤90 µA when used with 50 mΩ shunt. |
| CMRR | 76–80 dB (dc to 20 kHz) - suppresses noise from PWM switching edges and battery ripple in motor/solenoid control loops. |
| Small-Signal Bandwidth | 50 kHz - captures fast current transients in diesel injector actuation and H-bridge commutation without phase lag. |
| Supply Range | 4.5 V to 5.5 V - compatible with standard automotive 5 V LDOs; quiescent current ≤2.2 mA enables low-power ECU integration. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 for under-hood engine management and transmission control modules. |
Pinout & Package
AD8205YRZ is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm pitch, 5.00 mm × 4.00 mm body, and 1.75 mm maximum height. Pin 4 is no-connect (NC); all other pins are electrically active and validated per Analog Devices' metallization diagram and pin function table.
| 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 avoid CMRR degradation. |
| 3 (VREF2) | Offset adjustment reference | Paired with VREF1 to set output DC level; tied to GND for unipolar ground-referenced mode or to V+ for V+-referenced mode. |
| 4 (NC) | No connect | Not bonded; must remain floating-no PCB trace or solder mask opening required. |
| 5 (OUT) | Single-ended output | Delivers amplified, offset-adjustable voltage (0.05–4.8 V) with 2 Ω output impedance; drives 25 kΩ minimum load. |
| 6 (V+) | Positive supply | Accepts 4.5–5.5 V single supply; internal clamp limits absolute max to 12.5 V. |
| 7 (VREF1) | Offset adjustment reference | Functionally identical to VREF2; both pins connect to same internal node-used together to configure ratiometric or external reference modes. |
| 8 (+IN) | Non-inverting input | Connects to high side of current shunt; common-mode voltage may exceed V+ or fall below GND without damage. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current sensing | Configurable output offset enables symmetric ±40 mV input range (e.g., 0.5 V to 4.5 V output at 5 V supply), supporting regenerative braking and H-bridge motor reversal. |
| High common-mode survival | Withstands −25 V to +75 V continuous input and −30 V to +80 V transients-meets ISO 7637-2 pulse 5a/b requirements for 42 V vehicle systems. |
| Ratiometric offset adjustment | VREF1/VREF2 divider creates output offset proportional to V+, eliminating need for external precision reference in battery-varying environments. |
| Automotive qualification | AD8205YRZ is W-grade: AEC-Q100 qualified with controlled manufacturing, extended temperature validation, and automotive reliability reporting available. |
| Low drift performance | 15 µV/°C offset drift and 30 ppm/°C gain drift minimize calibration drift over lifetime-critical for emission-critical engine management sensors. |
Applications
| Diesel Injection Control | Transmission Control Unit |
|---|---|
|
Use Scenario: Monitoring solenoid coil current during PWM-driven fuel injector actuation in heavy-duty engines. IC Role / Device Role / Timing Role: High-side difference amplifier measuring shunt voltage across injector driver MOSFET source, rejecting battery ripple and ignition noise. Use Value: Enables closed-loop current regulation with <90 µA worst-case error (at 50 mΩ shunt), improving fuel metering accuracy and reducing NOx emissions. |
Use Scenario: Detecting clutch engagement current in automatic transmission valve bodies during gear shifts. IC Role / Device Role / Timing Role: Bidirectional current sensor placed on high-side of solenoid drivers, capturing both pull-in and hold phases with polarity-sensitive output. Use Value: Supports diagnostic fault detection (open/short circuits) and adaptive shift timing based on real-time solenoid health metrics. |
| H-Bridge Motor Control | DC-DC Converter Current Monitoring |
|
Use Scenario: Measuring bidirectional motor winding current in electric power steering (EPS) or active suspension actuators. IC Role / Device Role / Timing Role: Mid-bridge shunt amplifier providing direction-aware feedback to MCU PWM controller, replacing unstable ground-referenced op-amps. Use Value: Delivers accurate current polarity and magnitude even during rapid direction reversal, preventing torque ripple and enabling field-oriented control. |
Use Scenario: High-side current sensing in 42 V automotive DC-DC converters for infotainment or ADAS subsystems. IC Role / Device Role / Timing Role: Difference amplifier monitoring input or output inductor current, rejecting switching noise and bus transients. Use Value: Enables cycle-by-cycle overcurrent protection with 50 kHz bandwidth, preventing MOSFET failure during load dump events. |
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%), wider supply (4.5–76 V), but only unidirectional output and no VREF pins for offset tuning. | Limited to single-direction current monitoring (e.g., battery charge only); lacks configurable bidirectional mode needed for H-bridge or solenoid reversal. | Select MAX4080TASA+ only when unidirectional sensing suffices and higher gain tolerance justifies loss of offset flexibility. |
| INA240A1QDRQ1 | Higher bandwidth (400 kHz), better CMRR (120 dB), integrated EMI filtering, but requires external reference for offset and has larger 8-pin SO PowerPAD package. | Superior for high-frequency switching converters; however, its thermal pad requires PCB layout changes and lacks native ratiometric offset like AD8205YRZ's VREF1/VREF2. | Choose INA240A1QDRQ1 for high-speed DC-DC or OBC designs where EMI immunity and bandwidth outweigh SOIC footprint and ratiometric simplicity. |
Compared with MAX4080TASA+ and INA240A1QDRQ1, AD8205YRZ uniquely combines automotive-qualified SOIC packaging, built-in ratiometric offset adjustment via dual VREF pins, and guaranteed bidirectional operation-all within a 50 kHz bandwidth sufficient for solenoid and transmission control, making it optimal for cost-sensitive, space-constrained engine management modules.
Availability
AD8205YRZ is available at Aetrix Electronics and suitable for diesel injection control, transmission control units, H-bridge motor control, and 42 V DC-DC converter current monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AD8205YRZ 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 AD8205YRZ belongs to Analog Devices' precision current sensing amplifier product line, engineered specifically for robust, high-accuracy current measurement in harsh automotive environments-including 42 V battery systems and under-hood temperature extremes.
FAQ
What is the maximum common-mode voltage the AD8205YRZ can withstand continuously?
The AD8205YRZ supports a continuous input common-mode voltage range of −2 V to +65 V. Its absolute maximum rating extends to −25 V to +75 V for survival conditions, making it suitable for direct connection to 42 V vehicle battery rails with margin for load-dump transients. This specification is validated per Analog Devices' Absolute Maximum Ratings Table 2 and applies to both +IN and −IN pins independently.
Can the AD8205YRZ measure bidirectional current, and how is the output configured for that mode?
Yes, the AD8205YRZ supports true bidirectional current measurement. To enable this, VREF1 and VREF2 are connected-one to V+ and one to GND-setting the output to mid-scale (e.g., 2.5 V at 5 V supply). A ±40 mV differential input then produces symmetrical output swing from 0.5 V to 4.5 V. This configuration is explicitly detailed in the Output Offset Adjustment section of the AD8205YRZ datasheet (Rev. D, Page 9).
What is the purpose of the NC pin (Pin 4) on the AD8205YRZ, and how should it be handled on the PCB?
Pin 4 of the AD8205YRZ is designated NC (No Connect) and is not internally bonded. It must remain electrically floating-no trace, pad, or solder mask opening should connect to it. This is confirmed in the Pin Configuration diagram (Figure 3) and Pin Function Descriptions table (Table 3) of the AD8205YRZ datasheet. Leaving it unconnected prevents parasitic coupling and ensures specified CMRR performance.
How does the AD8205YRZ achieve high common-mode rejection despite operating from a single 5 V supply?
The AD8205YRZ achieves >76 dB CMRR through a proprietary dual-amplifier architecture with laser-trimmed resistor networks (RA–RF) matched to <0.01%. Input attenuators reduce common-mode voltage by 1/16.7 before feeding the first amplifier, keeping its inputs within the 5 V supply range while preserving differential signal integrity. This topology-detailed in the Theory of Operation section (Page 8)-enables rejection of battery ripple and PWM noise without requiring dual supplies.
Is the AD8205YRZ qualified for automotive applications, and what grade does it carry?
Yes, the AD8205YRZ carries the "W" grade designation, indicating it is qualified for automotive applications per AEC-Q100. It is rated for −40°C to +125°C operation and manufactured under controlled processes with automotive-specific reliability testing. This is confirmed in the Ordering Guide (Page 12) and Automotive Products section of the AD8205YRZ datasheet, distinguishing it from commercial-grade Y-only variants.
AD8205YRZ 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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8205YRZ FAQ
1.How can I place an order for AD8205YRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8205YRZ 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 AD8205YRZ reliable?
The price and inventory of AD8205YRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8205YRZ is usually 5 days.
3.What payment methods are accepted for AD8205YRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8205YRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8205YRZ?
AD8205YRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8205YRZ 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 AD8205YRZ?
For technical support, including AD8205YRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8205YRZ requirements.
6.How does Aetrix verify that AD8205YRZ is sourced from the original manufacturer or authorized distributors?
All AD8205YRZ 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 AD8205YRZ meets industry standards.
7.What is the process for return or replacement of AD8205YRZ?
All AD8205YRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8205YRZ, 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 AD8205YRZ part is unused and in its original packaging.
Return procedure for AD8205YRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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