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Analog Devices Inc. AD8212WYRMZ
- Part No.:
- AD8212WYRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8212WYRMZ.pdf
- Description:
- IC CURRENT MONITOR 1% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:222
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Product details
Overview
AD8212WYRMZ from Analog Devices is a high common-mode voltage current shunt monitor designed for unidirectional high-side current sensing in industrial power systems. It delivers 1000 µA/V transconductance, supports 7 V to 65 V supply range (or >500 V with external PNP), operates from −40°C to +125°C, and features integrated 5 V series regulator and output current compensation circuitry. It is used in motor control, DC-DC converters, and battery monitoring where precision shunt-based current measurement is required.
For engineers reviewing the AD8212WYRMZ datasheet, AD8212WYRMZ pinout, AD8212WYRMZ application, or AD8212WYRMZ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The AD8212WYRMZ implements a current-output instrumentation amplifier architecture with internal series regulator and patented base-current compensation circuit for high-voltage operation. Its input stage accepts differential voltages up to 500 mV while rejecting common-mode voltages from 7 V to 65 V natively-or beyond 500 V when paired with an external PNP transistor whose VCE breakdown defines the extended range.
It uses a feedback-controlled NPN output transistor (Q1) whose emitter current (IOUT) is precisely proportional to VSENSE, with transconductance fixed at 1000 µA/V. The ALPHA pin (Pin 6) connects to the external PNP's base to enable real-time mirroring of base current into R2, thereby correcting IOUT loss and maintaining accuracy independent of transistor β or temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 7 V to 65 V (native); >500 V with external PNP-defines maximum system bus voltage it can safely monitor without isolation. |
| Transconductance | 1000 µA/V-output current scales linearly with sensed shunt voltage; enables direct conversion to voltage via ROUT with predictable gain. |
| Input Offset Voltage | ±3 mV over temperature-sets minimum resolvable current error across full operating range; critical for low-current detection. |
| Small Signal Bandwidth | 1000 kHz at G = 10-supports fast transient response in motor control or switching power supply current loops. |
| Operating Temperature | −40°C to +125°C-qualified for under-hood automotive, industrial motor drives, and telecom power systems. |
| Regulator Output | 4.80 V to 5.20 V-powers internal circuitry referenced to COM; enables stable biasing even as V+ varies across wide range. |
| Output Impedance | 20 MΩ-ensures minimal loading on downstream ADC or buffer; preserves gain accuracy without additional op-amp buffering. |
Pinout & Package
AD8212WYRMZ is housed in an 8-lead MSOP (RM-8) package per JEDEC MO-187-AA, with 0.65 mm pitch and exposed pad option not specified. Pin 4 and Pin 7 are no-connect (NC) terminals and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (Pin 1) | Inverting amplifier input / supply rail | Connects to high-side of shunt; supplies internal regulator; sets common-mode reference point for entire device. |
| COM (Pin 2) | Regulator low side / internal ground reference | Internally tied to V+ − 5 V; serves as lowest potential node; must be connected to system ground or return path. |
| BIAS (Pin 3) | Bias circuit low side | Provides current path for internal bias network; in high-voltage mode, connects to RBIAS resistor to set IBIAS within 200 µA–1 mA range. |
| NC (Pin 4) | No connect | Not internally bonded; must be left floating; no routing or soldering allowed. |
| IOUT (Pin 5) | Current output terminal | Sinks proportional current (0–500 µA); connects to ROUT to generate output voltage; high impedance load required. |
| ALPHA (Pin 6) | Output compensation input | Accepts base current from external PNP; enables patented compensation circuit to correct IOUT for base current loss. |
| NC (Pin 7) | No connect | Not internally bonded; must be left floating; no routing or soldering allowed. |
| VSENSE (Pin 8) | Noninverting amplifier input | Connects to load-side of shunt; senses differential voltage across RSHUNT; input current ≤200 nA minimizes error. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable gain via external ROUT | Gain ranges from 1× to 100× using standard 1% resistors (e.g., 1 kΩ for ×1, 49.9 kΩ for ×50), enabling flexible signal scaling without redesign. |
| Integrated 5 V series regulator | Maintains stable internal biasing across full 7–65 V supply range; eliminates need for external LDO and simplifies power domain management. |
| Patented output current compensation | Corrects IOUT for base current drawn by external PNP transistor, allowing use of low-cost, low-β devices while preserving ±1% gain accuracy at >500 V. |
| High common-mode rejection architecture | Rejects up to 65 V common-mode voltage natively; extends to >500 V with external PNP-enables direct high-side sensing in 400 V+ battery systems. |
| Wide temperature operation | Specified performance from −40°C to +125°C ensures reliability in engine compartments, industrial inverters, and outdoor power equipment. |
Applications
| Motor Control | DC-DC Converter Monitoring |
|---|---|
Use Scenario: High-side current sensing in brushed/BLDC motor drivers where shunt is placed between battery and H-bridge high-side switches. IC Role / Device Role / Timing Role: Unidirectional current monitor providing real-time IMOTOR feedback to PWM controller or protection logic. Use Value: Enables overcurrent shutdown within 2 µs (settling time), supports 1000 kHz bandwidth for closed-loop torque control, and eliminates need for isolated amplifiers or Hall sensors. | Use Scenario: Input/output current monitoring in isolated or non-isolated buck, boost, or flyback converters operating at 12–48 V bus levels. IC Role / Device Role / Timing Role: Shunt-based current transducer feeding analog input of PMIC or microcontroller ADC. Use Value: Delivers ±1% gain error over temperature, supports accurate power budgeting and cycle-by-cycle current limiting without optical isolation. |
| Battery Management System | Industrial Power Supply Monitoring |
Use Scenario: Charge/discharge current measurement in 24–48 V lead-acid or LiFePO4 battery banks used in UPS, solar storage, or telecom backup systems. IC Role / Device Role / Timing Role: High-side current sensor interfaced to MCU via buffered ROUT voltage output. Use Value: Achieves <1.1 µV p-p noise (0.1–10 Hz) for precise coulomb counting; −40°C to +125°C rating supports wide ambient deployment. | Use Scenario: Overcurrent protection and load diagnostics in programmable lab power supplies or industrial 24/48 V distribution units. IC Role / Device Role / Timing Role: Primary current sense element in safety-critical monitoring path upstream of main regulation stage. Use Value: Withstands 65 V native common-mode range and >500 V with PNP, enabling single-device coverage across multiple output rails without level-shifting. |
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 |
|---|---|---|---|
| INA240A1QDRQ1 | Fixed gain (20 V/V), voltage output, AEC-Q100 qualified; no external PNP support; max common-mode = 80 V. | Automotive-grade; suited for ASIL-B systems but lacks >500 V extension capability. | Select when automotive qualification and voltage output are required, and common-mode stays below 80 V. |
| MAX4080TASA+ | Voltage output, fixed gain (10/20/50 V/V), max common-mode = 76 V, no external transistor interface. | Higher bandwidth (2.5 MHz), lower offset (±500 µV), but no >500 V operation or current-output flexibility. | Select when higher speed and lower offset are prioritized over ultra-high common-mode range and ROUT-based gain tuning. |
Compared with INA240A1QDRQ1 and MAX4080TASA+, the AD8212WYRMZ uniquely supports >500 V common-mode sensing via external PNP, offers user-adjustable gain through ROUT, and maintains ±1% accuracy across temperature-making it optimal for cost-sensitive, high-voltage industrial monitoring where isolation is impractical.
Availability
AD8212WYRMZ is available at Aetrix Electronics and suitable for motor control, DC-DC converter feedback, and battery monitoring applications requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant packaging.
Supply support for AD8212WYRMZ 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD8212WYRMZ belongs to Analog Devices' high-voltage current sense amplifier product line, engineered specifically for accurate, isolated-free shunt monitoring in industrial power conversion, motor drives, and energy storage systems.
FAQ
What is the maximum common-mode voltage the AD8212WYRMZ can handle without external components?
The AD8212WYRMZ supports a native common-mode voltage range of 7 V to 65 V. This means it can directly monitor shunt voltages on supply rails up to 65 V without any external transistors or level-shifting circuitry. Operation above 65 V requires connection of an external PNP transistor to the ALPHA and IOUT pins, leveraging the device's integrated compensation circuit to extend the range beyond 500 V while preserving accuracy. The 65 V limit arises from the internal process breakdown voltage, not packaging or thermal constraints.
How does the AD8212WYRMZ achieve accurate current measurement when using an external PNP transistor?
The AD8212WYRMZ achieves accuracy in high-voltage mode via its patented output current compensation circuit. When an external PNP transistor is connected to ALPHA (Pin 6), its base current is mirrored internally and applied across resistor R2-matching R1-to force the output transistor Q1 to increase IOUT by exactly the amount lost at the PNP base. This correction ensures the final IOUT remains strictly proportional to VSENSE (1000 µA/V), regardless of PNP β, temperature, or VCE. As a result, AD8212WYRMZ maintains ±1% gain error even at >500 V using inexpensive low-β PNP devices.
Can the AD8212WYRMZ be used for bidirectional current sensing?
No, the AD8212WYRMZ is a unidirectional current sensing device optimized for high-side, positive-current-only applications. Its architecture produces only sink current (IOUT) proportional to positive VSENSE, with no capability to resolve reverse polarity or negative differential inputs. For bidirectional monitoring-such as in battery charge/discharge systems-two AD8212WYRMZ devices must be used in complementary configuration: one sensing load current (shunt between battery+ and load), another sensing charge current (shunt between charger+ and battery+), with separate ROUT networks and signal conditioning.
What is the role of the BIAS pin (Pin 3) in high-voltage operation of the AD8212WYRMZ?
In high-voltage operation (>65 V), the BIAS pin (Pin 3) provides the return path for the bias current (IBIAS) that powers the internal regulator and compensation circuitry. An external resistor (RBIAS) is connected between BIAS and COM to set IBIAS within the recommended 200 µA to 1 mA range. For example, at V+ = 500 V, a 500 kΩ RBIAS yields ~990 µA IBIAS-ensuring proper turn-on of internal circuits while limiting power dissipation. Incorrect RBIAS selection risks under-biasing (device malfunction) or over-biasing (excessive self-heating), both degrading accuracy and reliability of AD8212WYRMZ.
Does the AD8212WYRMZ require external components to function in standard 12 V or 48 V systems?
Yes, the AD8212WYRMZ requires at least one external component to deliver usable output: a precision resistor (ROUT) connected between IOUT (Pin 5) and a voltage reference (typically COM or VCC). This converts the proportional output current (0–500 µA) into a voltage (e.g., 500 mV full-scale with 1 kΩ). No other active components are needed-its integrated 5 V regulator eliminates external LDO requirements, and the internal compensation circuit removes the need for external Zener diodes or FETs-even in high-voltage configurations. All other pins (V+, COM, BIAS, ALPHA, VSENSE) connect directly to system nodes per the application schematic.
AD8212WYRMZ 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
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±1%
- Voltage - Input:
- 7V ~ 65V
- Current - Output:
- 500µA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8212WYRMZ FAQ
1.How can I place an order for AD8212WYRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8212WYRMZ 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 AD8212WYRMZ reliable?
The price and inventory of AD8212WYRMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8212WYRMZ is usually 5 days.
3.What payment methods are accepted for AD8212WYRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8212WYRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8212WYRMZ?
AD8212WYRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8212WYRMZ 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 AD8212WYRMZ?
For technical support, including AD8212WYRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8212WYRMZ requirements.
6.How does Aetrix verify that AD8212WYRMZ is sourced from the original manufacturer or authorized distributors?
All AD8212WYRMZ 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 AD8212WYRMZ meets industry standards.
7.What is the process for return or replacement of AD8212WYRMZ?
All AD8212WYRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8212WYRMZ, 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 AD8212WYRMZ part is unused and in its original packaging.
Return procedure for AD8212WYRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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