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Analog Devices Inc. AD8212YRMZ-R7
- Part No.:
- AD8212YRMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8212YRMZ-R7.pdf
- Description:
- IC CURRENT MONITOR 1% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:912
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Product details
Overview
AD8212YRMZ-R7 from Analog Devices is a high common-mode voltage current shunt monitor designed for high-side unidirectional current sensing in industrial power systems. It delivers 1000 µA/V transconductance, supports 7 V to 65 V supply (or >500 V with external PNP), features ±2 mV input offset voltage (RTI), and operates across −40°C to +125°C - enabling precise motor control and DC-DC converter current monitoring.
For engineers reviewing the AD8212YRMZ-R7 datasheet, AD8212YRMZ-R7 pinout, AD8212YRMZ-R7 application, or AD8212YRMZ-R7 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for high-voltage current sensing applications requiring stable gain accuracy and output current compensation.
Technical Context
The AD8212YRMZ-R7 implements a current-output instrumentation amplifier architecture with integrated 5 V series regulator and patented base-current compensation circuit for external PNP transistors. Its differential input stage rejects common-mode voltages up to 65 V natively, and extends beyond 500 V when biased via an external high-voltage PNP transistor connected to ALPHA (Pin 6) and IOUT (Pin 5).
Operation relies on transconductance-based output (IOUT = gm × VSENSE), where gm = 1000 µA/V is fixed, and gain is set externally via ROUT. The device uses internal feedback to force virtual short between VSENSE (Pin 8) and COM (Pin 2), while maintaining COM at (V+) − 5 V - enabling accurate RTI offset tracking and stable regulation across temperature and supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 7 V to 65 V (native); >500 V with external PNP - defines usable bus voltage range without external regulator. |
| Transconductance (gm) | 1000 µA/V - fixed gain coefficient; output current scales linearly with sensed shunt voltage, simplifying ROUT selection. |
| Input Offset Voltage (RTI) | ±2 mV at TA = 25°C - sets minimum resolvable shunt voltage; enables ≥0.5% full-scale accuracy for 500 mV input range. |
| Common-Mode Rejection | Not specified as CMRR value, but functional common-mode range up to 65 V (or >500 V) confirms robust high-side sensing capability. |
| Output Current Range | 0 µA to 500 µA - corresponds to 0–500 mV differential input; determines max ROUT value before violating VOUT ≤ (V+) − 5 V limit. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and telecom power supplies. |
| Small-Signal Bandwidth | 1000 kHz at gain = 10 - supports fast transient current detection in switching converters and PWM-driven loads. |
Pinout & Package
AD8212YRMZ-R7 is housed in an 8-lead MSOP (RM-8) package per JEDEC MO-187-AA, with 0.65 mm pitch and exposed pad for thermal performance. Pin 4 and Pin 7 are no-connect (NC) and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (Pin 1) | Inverting amplifier input / supply rail | Connects to high-side battery/supply rail; powers internal regulator and sets common-mode reference point. |
| COM (Pin 2) | Regulator low side / internal circuit ground | Internally held at (V+) − 5 V; serves as reference for all internal circuitry and output current return path. |
| BIAS (Pin 3) | Bias circuit low side | Ground connection for bias network in normal operation; tied to GND or RBIAS in high-voltage mode. |
| NC (Pin 4) | No connect | Unbonded pin; must be left 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 for ADC or comparator interface. |
| ALPHA (Pin 6) | External PNP base compensation input | Receives base current from external PNP; enables patented compensation to maintain gm accuracy above 65 V. |
| NC (Pin 7) | No connect | Unbonded pin; must be left floating - no routing or connection required. |
| VSENSE (Pin 8) | Noninverting amplifier input | Connects to load-side of shunt resistor; senses differential voltage with 2 kΩ input impedance and <200 nA input bias current. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable gain via external ROUT | Gain = ROUT / 1 kΩ (e.g., 10 kΩ → gain = 10 V/V); enables flexible scaling without changing IC. |
| Integrated 5 V series regulator | Maintains stable (V+) − 5 V at COM pin across full supply and temperature range - eliminates need for external LDO. |
| Patented output current compensation | Corrects for base current loss in external PNP transistors - preserves 1000 µA/V transconductance accuracy up to >500 V. |
| High-voltage operation support | Enables >500 V common-mode sensing using low-cost PNP transistors (e.g., MJE172, FMMT718) instead of expensive HV FETs. |
| Low quiescent current | 220–720 µA typical supply current (V+ = 7–65 V); reduces self-heating and system power overhead in always-on monitoring. |
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 isolated analog output proportional to motor phase current. Use Value: Enables overcurrent protection and torque estimation without galvanic isolation; supports fast response (<2 µs settling) for fault shutdown. |
Use Scenario: Input/output current monitoring in isolated flyback or forward converters operating at 24–48 V bus voltage. IC Role / Device Role / Timing Role: High-side shunt amplifier feeding into isolated ADC or optocoupled feedback loop. Use Value: Maintains ±1% gain error across temperature and supply; eliminates need for precision op-amp + external references. |
| Battery Management System | Industrial Power Supply |
|
Use Scenario: Charge/discharge current measurement in 48 V telecom or EV auxiliary battery packs with centralized shunt. IC Role / Device Role / Timing Role: Primary current sensor in bidirectional configuration (dual AD8212YRMZ-R7) for net current calculation. Use Value: Delivers <±3 mV offset drift over −40°C to +125°C - ensures SOC accuracy within ±0.5% over lifetime. |
Use Scenario: Overload detection in programmable lab power supplies or industrial PLC power modules with 36–60 V rails. IC Role / Device Role / Timing Role: Fault-sensing front-end that triggers crowbar or shutdown when load exceeds threshold. Use Value: Supports >500 V operation with external PNP - enables direct sensing on high-voltage intermediate bus stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Voltage-output architecture; 80 V max common-mode; no external transistor support; higher offset (±20 µV typ). | Limited to ≤80 V systems; requires external gain stage for wide dynamic range; AEC-Q100 qualified. | Choose for automotive-grade 12/24 V systems needing voltage output and qualification - not for >100 V or PNP-assisted operation. |
| MAX4080FASA+ | Current-output; 76 V max common-mode; no integrated regulator or PNP compensation; smaller MSOP-8 footprint. | Cannot extend beyond 76 V; lacks bias regulation and base-current correction - accuracy degrades above 65 V. | Choose for space-constrained ≤76 V designs where external biasing is acceptable and PNP extension is unnecessary. |
Compared with INA240A1QDRQ1 and MAX4080FASA+, the AD8212YRMZ-R7 uniquely supports >500 V operation via external PNP with built-in compensation and regulator, making it the only option among the three for reliable high-voltage industrial current monitoring without added components.
Availability
AD8212YRMZ-R7 is available at Aetrix Electronics and suitable for motor control, DC-DC converter monitoring, and industrial power supply applications requiring stable component supply, extended temperature operation, and high common-mode voltage tolerance.
Supply support for AD8212YRMZ-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 healthcare markets since 1965.
The AD8212YRMZ-R7 belongs to Analog Devices' precision current sensing amplifier product line, engineered specifically for high-side, high-common-mode, unidirectional current measurement in rugged power systems.
FAQ
What is the maximum common-mode voltage supported by AD8212YRMZ-R7 without external components?
The AD8212YRMZ-R7 supports a native common-mode voltage range of 7 V to 65 V. This is defined by its internal process breakdown limits and does not require external transistors. Operation above 65 V requires an external PNP transistor connected to ALPHA (Pin 6) and IOUT (Pin 5), enabling >500 V capability as confirmed in the datasheet's Figure 23 and Table 1.
Does AD8212YRMZ-R7 provide voltage output or current output?
The AD8212YRMZ-R7 provides a current output (IOUT) proportional to the sensed differential voltage, with fixed transconductance of 1000 µA/V. To obtain a voltage output, an external resistor (ROUT) must be connected from IOUT to a reference node - typically ground or COM - converting IOUT into VOUT = IOUT × ROUT.
Can AD8212YRMZ-R7 measure bidirectional current?
No, the AD8212YRMZ-R7 is a unidirectional current shunt monitor optimized for high-side sensing of current flowing from supply to load. For bidirectional applications such as battery charge/discharge monitoring, two AD8212YRMZ-R7 devices must be used in complementary configuration as shown in Figure 27 of the datasheet.
What is the purpose of the ALPHA pin (Pin 6) on AD8212YRMZ-R7?
The ALPHA pin (Pin 6) on AD8212YRMZ-R7 receives the base current of an external PNP transistor used in high-voltage operation mode. It feeds the patented output current compensation circuit, which mirrors this current to offset base-current loss - ensuring the full 1000 µA/V transconductance is preserved even at >500 V common-mode voltage.
Is AD8212YRMZ-R7 RoHS compliant and lead-free?
Yes, AD8212YRMZ-R7 is RoHS compliant and lead-free, as indicated by the "Z" suffix in the ordering guide and confirmed in the official Analog Devices documentation. It meets EU Directive 2011/65/EU and is compatible with standard Pb-free reflow profiles.
AD8212YRMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-R7 FAQ
1.How can I place an order for AD8212YRMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8212YRMZ-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 AD8212YRMZ-R7 reliable?
The price and inventory of AD8212YRMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8212YRMZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8212YRMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8212YRMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8212YRMZ-R7?
AD8212YRMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8212YRMZ-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 AD8212YRMZ-R7?
For technical support, including AD8212YRMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8212YRMZ-R7 requirements.
6.How does Aetrix verify that AD8212YRMZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8212YRMZ-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 AD8212YRMZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8212YRMZ-R7?
All AD8212YRMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8212YRMZ-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 AD8212YRMZ-R7 part is unused and in its original packaging.
Return procedure for AD8212YRMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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