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Analog Devices Inc. LT9890AV#PBF
- Part No.:
- LT9890AV#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 108-BFLGA
- Datasheet:
-
LT9890AV#PBF.pdf
- Description:
- HIGH SIDE HIGH CURRENT MONITOR
- Quantity:
- Payment:
- Shipping:
Inventory:3,247
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Product details
Overview
The LT9890AV#PBF from Analog Devices is a high-precision, integrated 150 A high-side current monitor with factory-calibrated copper sense element, ±1.3% total unadjusted error (TUE) at 45–150 A, 3.2 MHz small-signal bandwidth, and 150 μΩ current-path resistance-designed for Intel Psys platform power monitoring on CPU motherboards.
For engineers reviewing the LT9890AV#PBF datasheet, LT9890AV#PBF pinout, LT9890AV#PBF application, or LT9890AV#PBF equivalent, this page delivers verified specifications, validated LGA-108 pin mapping, Intel Psys compatibility context, and real-world design implications for server power integrity and high-current PCB layout.
Technical Context
The LT9890AV#PBF implements a closed-loop, zero-temperature-coefficient amplifier architecture that forces equal voltage across internal IP and IM terminals, enabling ground-referenced IOUT proportional to sensed current. Its proprietary copper shunt-calibrated at factory-eliminates external resistor drift and offset errors.
It operates over 2.7 V to 65 V input range, supports transient currents up to 250 A (1 s RMS ≤150 A), and achieves 92 dB DC common-mode rejection via internal negative regulator stabilization-critical for noisy server rail environments where VIP varies widely.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Range | 7.5 A to 150 A continuous; supports 250 A transients (1 s max) without damage-enables robust monitoring of CPU VRM output rails. |
| Total Unadjusted Error | ±1.3% TUE (45–150 A); <±2% at 15 A-guarantees accurate Psys reporting without system-level calibration. |
| Bandwidth | 3.2 MHz at 150 A; 0.7 MHz at 7.5 A-preserves fast load-step response for dynamic power management in Intel platforms. |
| Current Path Resistance | 150 μΩ typical (max 325 μΩ); 3900 ppm/°C tempco-minimizes self-heating and insertion loss in high-current paths. |
| Supply Range | 2.7 V to 65 V VIP; 2.6 V UVLO with 190 mV hysteresis-operates directly from 12 V, 48 V, or intermediate bus rails. |
| Output Type | Analog current output (IOUT); 26,600:1 input-to-output ratio (e.g., 5 mA at 133 A)-simplifies ADC interfacing with scalable ROUT selection. |
| Operating Temp | −40°C to +125°C TJ; 150°C absolute max junction temperature-qualified for industrial and server thermal environments. |
Pinout & Package
Package: 108-terminal Land Grid Array (LGA), 10 mm × 20 mm × 2.75 mm (CC-108-3), RoHS-compliant, bottom-thermal-pad exposed for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1–36, 97–102 (IM) | Negative Current Input | All 42 pins must be tied together externally; carry full load return current-requires wide copper pour and thermal vias beneath package. |
| Pin 49–84, 103–108 (IP) | Positive Current Input | All 42 pins must be tied together externally; carry full load supply current-mechanically anchors high-current path into device. |
| Pin 43 (IOUT) | Analog Output Current | Ground-referenced proportional current output; connects to ROUT to generate VIOUT-no internal pull-up/down; requires external filtering if needed. |
| Pin 37–38, 42, 47–48, 85–96 (GND) | Ground Reference | Provides low-impedance return for internal circuitry; must connect to clean analog/digital ground plane near IP/IM routing. |
| Pin 39–41, 44–46 (DNC) | Do Not Connect | Electrically floating; soldered for mechanical stability only-must not route traces or connect to any net. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Copper Sense Element | Eliminates external shunt resistor placement, tolerance, and thermal drift-reduces BOM count and improves long-term accuracy in 24/7 server operation. |
| Factory Calibration | Corrects for copper resistivity nonidealities at wafer level-ensures ±1.3% TUE without user calibration or trimming circuits. |
| Intel Psys Compatibility | Fully meets Intel's platform power monitoring specification for CPU power delivery systems-enables direct integration into reference designs for Xeon and Core processors. |
| High CMRR (92 dB) | Maintains accuracy despite large common-mode voltage swings (2.7–65 V) on IP-critical when monitoring high-voltage VRMs adjacent to noisy digital logic. |
| Low Thermal Resistance (θJCB = 3.4°C/W) | Enables efficient heat transfer from junction to PCB bottom layer-supports >100 A continuous operation with proper 70 μm copper and thermal vias. |
Applications
| Server CPU Power Monitoring | High-Voltage Industrial Power Supply |
|---|---|
|
Use Scenario: Real-time Psys measurement on dual-socket Xeon motherboard VRM output rails under dynamic workloads. IC Role / Device Role / Timing Role: High-side current sensor providing analog IOUT proportional to CPU core current for Intel PMBus-compatible power management ICs. Use Value: Enables accurate platform-level power capping and thermal throttling without adding shunt resistor error or board space. |
Use Scenario: Monitoring 48 V input current in telecom rectifier modules with strict efficiency and reliability requirements. IC Role / Device Role / Timing Role: Primary current sensing element in isolated secondary-side feedback loop for digitally controlled DC-DC converters. Use Value: Delivers stable 3.2 MHz bandwidth and ±1.3% TUE across wide input voltage range-reducing need for additional gain/offset compensation. |
| Network Storage PSU | Photovoltaic Inverter DC Link |
|
Use Scenario: Measuring 12 V/150 A output current from redundant PSUs feeding NVMe storage arrays. IC Role / Device Role / Timing Role: High-current, low-drift sense node feeding microcontroller ADC for health monitoring and fault logging. Use Value: 150 μΩ RPATH minimizes insertion loss (<225 mW at 150 A), preserving PSU efficiency while enabling precise current trending. |
Use Scenario: DC link current monitoring in string inverters handling up to 150 A from solar array inputs. IC Role / Device Role / Timing Role: Fault-detection current sensor interfaced to protection MCU for overcurrent shutdown within 2 µs response time. Use Value: 2 µs large-signal response ensures compliance with IEC 62109 anti-islanding and rapid shutdown requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, integrated-shunt current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2947 | 30 A range, 300 μΩ sense resistor, 0–15 V input range, integrated energy accumulation-lower current capacity and narrower voltage range. | Targeted at lower-power embedded systems (e.g., battery-powered edge nodes), not server-grade Psys monitoring. | Select LTC2947 only when energy metering and sub-30 A range are required; not suitable for 150 A CPU rail monitoring. |
| LTC6102 | External shunt required, ±10 μV offset, 4–60 V supply, no integrated sense element-higher design complexity and calibration burden. | Suitable for precision lab equipment or custom shunt-based designs where flexibility outweighs integration benefits. | Choose LTC6102 when external shunt selection, ultra-low offset, or multi-range scaling is mandatory-LT9890AV#PBF eliminates shunt sourcing and layout sensitivity. |
Compared with LTC2947 and LTC6102, the LT9890AV#PBF uniquely combines 150 A capability, factory-trimmed copper shunt, Intel Psys compliance, and LGA thermal performance-making it the only drop-in solution for high-density server motherboard current sensing without sacrificing accuracy or board area.
Availability
LT9890AV#PBF is available at Aetrix Electronics and suitable for server CPU power monitoring, telecom rectifier control, and photovoltaic inverter DC-link protection requiring stable component supply and long-lifecycle support.
Supply support for LT9890AV#PBF 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 computing markets since 1965.
The LT9890AV#PBF belongs to Analog Devices' precision current sensing portfolio, engineered specifically for high-current, high-accuracy platform power monitoring in datacenter and infrastructure applications where reliability and Psys compliance are critical.
FAQ
What is the maximum continuous current rating for the LT9890AV#PBF?
The LT9890AV#PBF supports 150 A continuous current (RMS) with a 250 A transient rating for up to 1 second. Its 150 μΩ current-path resistance and θJCB = 3.4°C/W thermal design enable sustained operation at rated current when mounted on a properly designed 70 μm copper PCB with thermal vias. Exceeding 150 A RMS risks exceeding the 150°C maximum junction temperature.
Does the LT9890AV#PBF require an external shunt resistor?
No, the LT9890AV#PBF integrates a factory-calibrated copper current-sense element-no external shunt is required. This eliminates shunt-related errors including thermal drift, tolerance variation, and PCB layout sensitivity. The internal 150 μΩ path is trimmed during manufacturing to achieve ±1.3% TUE across 45–150 A, making the LT9890AV#PBF a complete, single-component current sensing solution.
How does the LT9890AV#PBF interface with an ADC?
The LT9890AV#PBF provides a proportional analog current output (IOUT). To interface with an ADC, connect an external resistor (ROUT) between IOUT and ground to convert IOUT to voltage (VIOUT = IOUT × ROUT). For example, with ROUT = 200 Ω and 150 A input, IOUT ≈ 5.63 mA → VIOUT ≈ 1.126 V. Select ROUT based on ADC input range and required resolution-keeping in mind output impedance and noise trade-offs.
Is the LT9890AV#PBF compatible with Intel Psys specifications?
Yes, the LT9890AV#PBF is explicitly designed and qualified for Intel Psys (platform power) applications. Its ±1.3% TUE over 45–150 A, 3.2 MHz bandwidth, and 2.7–65 V operating range meet Intel's accuracy, speed, and voltage requirements for CPU power monitoring. The datasheet confirms Psys compatibility in both Features and General Description sections.
What PCB layout considerations are critical for the LT9890AV#PBF?
Critical layout practices for the LT9890AV#PBF include: using ≥70 μm copper thickness; routing wide (≥18 mm) planes to all IP and IM pins; placing thermal vias directly beneath the package bottom; tying all 42 IP and 42 IM pins to their respective planes; leaving DNC pins floating but soldered; and avoiding narrow constrictions near the device-since PCB trace resistance often exceeds the 150 μΩ internal path and dominates self-heating and TUE.
LT9890AV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 108-BFLGA
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Current Regulator
- Sensing Method:
- High-Side
- Accuracy:
- -
- Voltage - Input:
- 2.7V ~ 65V
- Current - Output:
- 150A
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 108-LGA (10x20)
LT9890AV#PBF FAQ
1.How can I place an order for LT9890AV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT9890AV#PBF 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 LT9890AV#PBF reliable?
The price and inventory of LT9890AV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT9890AV#PBF is usually 5 days.
3.What payment methods are accepted for LT9890AV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT9890AV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT9890AV#PBF?
LT9890AV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT9890AV#PBF 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 LT9890AV#PBF?
For technical support, including LT9890AV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT9890AV#PBF requirements.
6.How does Aetrix verify that LT9890AV#PBF is sourced from the original manufacturer or authorized distributors?
All LT9890AV#PBF 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 LT9890AV#PBF meets industry standards.
7.What is the process for return or replacement of LT9890AV#PBF?
All LT9890AV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT9890AV#PBF, 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 LT9890AV#PBF part is unused and in its original packaging.
Return procedure for LT9890AV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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