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Analog Devices Inc. AD8212YRMZ
- Part No.:
- AD8212YRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8212YRMZ.pdf
- Description:
- IC CURRENT MONITOR 1% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,388
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Product details
Overview
AD8212YRMZ from Analog Devices is a high common-mode voltage current shunt monitor IC designed for unidirectional high-side current sensing across shunt resistors in industrial and automotive power systems. It delivers 1000 µA/V transconductance, supports 7 V to 65 V supply (V+) range natively, extends to >500 V with external PNP transistor, features integrated 5 V series regulator, and operates from −40°C to +125°C in an 8-lead MSOP package.
For engineers reviewing the AD8212YRMZ datasheet, AD8212YRMZ pinout, AD8212YRMZ application, or AD8212YRMZ 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 AD8212YRMZ implements a precision current-output instrumentation amplifier architecture with internal series-regulated biasing. Its core operation relies on feedback-controlled PNP output transistor Q1, where IOUT = gm × VSENSE (gm = 1000 µA/V), enabling direct current-mode interfacing with high-impedance ADC inputs or optocouplers.
In high-voltage mode (>65 V), it uses ALPHA (Pin 6) to drive an external PNP's base while mirroring its base current into R2-compensating for base-current loss and preserving full transconductance accuracy. The integrated 5 V regulator maintains stable COM-to-V+ offset regardless of supply variation, enabling accurate RTI offset performance across temperature and voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transconductance | 1000 µA/V - fixed gain slope; output current scales linearly with sensed differential voltage, eliminating need for external gain-setting op-amp. |
| Common-Mode Voltage Range | 7 V to 65 V native; >500 V with external PNP - enables direct monitoring in 48 V telecom, 300–500 V EV battery stacks, and industrial DC bus applications without level-shifting. |
| Input Offset Voltage (RTI) | ±2 mV max at 25°C - ensures ≤0.4% error at 500 mV full-scale input; critical for accurate low-current detection in motor phase control. |
| Supply Current | 220–720 µA (7–65 V) - ultra-low quiescent draw allows use in always-on battery monitoring without significant drain. |
| Bandwidth (Gain = 20) | 500 kHz - supports fast transient response in PWM-driven motor controls and switching power supplies with <2 µs settling time. |
| Regulator Output | 4.80–5.20 V @ 7–65 V supply - powers internal circuitry independently; enables stable biasing even during supply dips or surges. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor power electronics. |
Pinout & Package
AD8212YRMZ is housed in an 8-lead MSOP (RM-8) package per JEDEC MO-187-AA, with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (Pin 1) | Supply voltage input / inverting amplifier input | Connects to high-side rail; serves as both power source and reference node for common-mode rejection up to 65 V (or >500 V with external PNP). |
| COM (Pin 2) | Regulator low side / internal circuit ground reference | Internally regulated 5 V below V+; must be connected to system ground or low-side return path to establish stable bias point. |
| BIAS (Pin 3) | Bias circuit low side | Provides return path for internal regulator current; tied to GND in normal operation; connects to RBIAS resistor in high-voltage mode. |
| NC (Pin 4) | No connect | Internally unconnected; leave floating or grounded per layout best practice-no electrical function. |
| IOUT (Pin 5) | Current output terminal | Sinks proportional current (0–500 µA); connects to ROUT to generate voltage output; high impedance (>20 MΩ) preserves gain accuracy. |
| ALPHA (Pin 6) | Output compensation circuit input | Drives base of external PNP in high-voltage mode; enables patented base-current compensation to maintain full transconductance accuracy. |
| NC (Pin 7) | No connect | Internally unconnected; no routing required. |
| VSENSE (Pin 8) | Noninverting amplifier input | Connects to load-side of shunt resistor; senses differential voltage up to ±500 mV; input bias current ≤200 nA minimizes shunt error. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable gain via external ROUT | Gain set from 1× to 100× using single resistor (e.g., 1 kΩ for 1 V/V, 49.9 kΩ for 50 V/V), simplifying BOM and layout vs. multi-resistor amplifiers. |
| Integrated 5 V series regulator | Eliminates need for external LDO or Zener; maintains stable internal bias across full 7–65 V supply range, ensuring consistent offset and bandwidth performance. |
| Patented output current compensation | Corrects for external PNP base current loss in >500 V applications, enabling use of low-cost bipolar transistors without sacrificing accuracy (±1% gain error). |
| High-voltage operation support | Extends common-mode range beyond IC process limits using external PNP; supports 500 V+ bus monitoring with minimal added components and no PCB redesign. |
| Low input bias current (≤200 nA) | Minimizes voltage drop error across high-value shunts used in low-current battery monitoring, preserving measurement fidelity at microamp-level loads. |
Applications
| Motor Phase Current Monitoring | DC-DC Converter Output Current Sensing |
|---|---|
Use Scenario: Real-time current feedback for field-oriented control (FOC) of 48 V BLDC motors in electric power steering or industrial actuators. IC Role / Device Role / Timing Role: High-side shunt monitor providing isolated, fast-response current signal to MCU ADC with <2 µs settling time and 500 kHz bandwidth. Use Value: Enables precise torque regulation and overcurrent protection without galvanic isolation components, reducing system cost and board space by 30% vs. isolated amplifier solutions. |
Use Scenario: Output current monitoring in 12 V–48 V isolated DC-DC modules for telecom and server power supplies. IC Role / Device Role / Timing Role: Unidirectional current sensor interfacing with optocoupler or isolated ADC, leveraging current-output architecture for noise immunity in noisy switching environments. Use Value: Delivers ±1% full-scale accuracy across temperature and line regulation, supporting tight current-limit thresholds required for UL62368-1 compliance. |
| Automotive Battery Management (12 V/48 V) | Industrial HV DC Bus Monitoring (300–500 V) |
Use Scenario: Charge/discharge current measurement in 12 V starter batteries and 48 V mild-hybrid systems using bidirectional dual-AD8212 configuration. IC Role / Device Role / Timing Role: Paired unidirectional monitors-one on battery side, one on load side-enabling net current calculation without shared reference constraints. Use Value: Achieves <10 µV/°C offset drift and ±2 mV RTI offset, meeting ASIL-B diagnostic coverage requirements for state-of-charge estimation. |
Use Scenario: Continuous current monitoring in 400 V battery packs for energy storage systems and EV charging infrastructure. IC Role / Device Role / Timing Role: High-voltage mode current monitor using MMBT3906 PNP (VCEO = 40 V) with external 500 kΩ RBIAS, extending common-mode range to 500 V. Use Value: Maintains ±1% gain error and 500 kHz bandwidth at 500 V CM, eliminating need for expensive HV op-amps or custom ASICs while reducing bill-of-materials by two active components. |
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+ | Current-output amplifier with 1000 µA/V gain, but limited to 76 V max common-mode; no integrated regulator or ALPHA compensation circuit. | Suitable only for ≤76 V systems; requires external 5 V supply and separate base-current compensation network for HV extension. | Select when operating strictly within 7–76 V range and lowest possible footprint is critical-MSOP-8 same as AD8212YRMZ. |
| TSC1021IYPT | Voltage-output architecture (20 V/V fixed gain); 60 V max common-mode; no high-voltage extension capability; requires external gain resistors for scaling. | Designed for cost-sensitive 12–48 V automotive body electronics; lacks >500 V support and current-output noise immunity. | Choose for simple voltage-output interface where isolation is handled externally and supply voltage never exceeds 60 V. |
Compared with MAX4080TASA+ and TSC1021IYPT, AD8212YRMZ uniquely combines >500 V extensibility via ALPHA compensation, integrated 5 V regulation, and current-output architecture-making it the only option among the three that supports true 500 V+ battery stack monitoring without additional active components or accuracy degradation.
Availability
AD8212YRMZ is available at Aetrix Electronics and suitable for motor control, DC-DC converter feedback, and battery management applications requiring stable component supply across automotive, industrial, and energy storage programs.
Supply support for AD8212YRMZ 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 AD8212YRMZ belongs to Analog Devices' precision current sense amplifier product line, engineered specifically for robust, high-common-mode, unidirectional current monitoring in harsh environments where reliability and extended voltage range are critical.
FAQ
What is the maximum common-mode voltage supported by AD8212YRMZ without external components?
AD8212YRMZ supports a native common-mode voltage range of 7 V to 65 V when operated in normal mode with no external pass transistor. This is defined by the internal process breakdown limit and is verified across −40°C to +125°C. Operation above 65 V requires connection of an external PNP transistor as described in the datasheet Figure 23; the AD8212YRMZ itself does not sustain >65 V between V+ and COM in standalone configuration.
How does the ALPHA pin (Pin 6) function in high-voltage operation of AD8212YRMZ?
The ALPHA pin (Pin 6) on AD8212YRMZ drives the base of an external PNP transistor in high-voltage mode and feeds the base current into an internal mirrored compensation circuit. This circuit generates a compensating voltage across R2 equal to the base-emitter drop lost in the external transistor, forcing the output current IOUT to include the base current-thereby preserving the full 1000 µA/V transconductance and maintaining ±1% gain accuracy at 500 V common-mode.
Can AD8212YRMZ measure bidirectional current directly?
No, AD8212YRMZ is a unidirectional current shunt monitor optimized for high-side sensing of current flowing from supply to load. To measure bidirectional current, two AD8212YRMZ devices must be used in complementary configuration-one sensing load current and the other sensing charge current-as shown in Figure 27 of the datasheet, with separate ROUT networks and differential ADC interpretation.
What is the purpose of the BIAS pin (Pin 3) on AD8212YRMZ?
The BIAS pin (Pin 3) on AD8212YRMZ provides the return path for the internal 5 V series regulator's bias current. In normal operation (7–65 V), it is connected to ground. In high-voltage mode (>65 V), it connects to an external RBIAS resistor that sets the bias current (IBIAS = (V+ − 5 V)/RBIAS), ensuring proper regulator activation while limiting total current to 200 µA–1 mA per datasheet specifications.
Does AD8212YRMZ require external passive components for basic operation?
Yes, AD8212YRMZ requires at minimum an external ROUT resistor to convert its current output (IOUT) into a measurable voltage (VOUT = IOUT × ROUT). For high-voltage operation, it also requires an external PNP transistor and RBIAS resistor. No external gain-setting op-amp or level-shifter is needed, but a buffer may be added before ADC input to preserve high-impedance loading integrity.
AD8212YRMZ 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8212YRMZ FAQ
1.How can I place an order for AD8212YRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8212YRMZ 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 AD8212YRMZ reliable?
The price and inventory of AD8212YRMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8212YRMZ is usually 5 days.
3.What payment methods are accepted for AD8212YRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8212YRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8212YRMZ?
AD8212YRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8212YRMZ 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 AD8212YRMZ?
For technical support, including AD8212YRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8212YRMZ requirements.
6.How does Aetrix verify that AD8212YRMZ is sourced from the original manufacturer or authorized distributors?
All AD8212YRMZ 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 AD8212YRMZ meets industry standards.
7.What is the process for return or replacement of AD8212YRMZ?
All AD8212YRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8212YRMZ, 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 AD8212YRMZ part is unused and in its original packaging.
Return procedure for AD8212YRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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