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Analog Devices Inc. ADM1191-2ARMZ-R7
- Part No.:
- ADM1191-2ARMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADM1191-2ARMZ-R7.pdf
- Description:
- IC PWR MONITOR DGTL ALERT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,675
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Product details
Overview
ADM1191-2ARMZ-R7 from Analog Devices is a 12-bit digital power monitor IC with integrated current sense amplifier, voltage sensing, I²C interface, CONV pin for synchronized ADC triggering, and active-low ALERTB overcurrent interrupt output. It operates from 3.15 V to 26 V, achieves ±1.45% current accuracy at 75 mV sense voltage (0°C to +70°C), and supports up to 16 devices on one I²C bus via A0/A1 address pins. It is used in server power budgeting and telecom equipment for real-time VI monitoring.
For engineers reviewing the ADM1191-2ARMZ-R7 datasheet, ADM1191-2ARMZ-R7 pinout, ADM1191-2ARMZ-R7 application, or ADM1191-2ARMZ-R7 equivalent, key selection considerations include its 10-lead MSOP package, 400 kHz I²C fast-mode support, SETV-configurable overcurrent threshold, 150 µs ADC conversion time, and dual-channel (voltage + current) readback capability with programmable VRANGE scaling.
Technical Context
The ADM1191-2ARMZ-R7 integrates a precision current sense amplifier feeding a shared 12-bit SAR ADC multiplexed between VCC voltage and SENSE differential inputs. Its internal comparator compares the amplified sense voltage against an externally applied SETV reference to drive the open-drain ALERTB output with <2 µs response.
Control is implemented via I²C fast-mode (400 kHz) with 7-bit slave addressing extended to 16 options using A0/A1 logic states, and hardware-triggered conversions via the CONV pin - enabling deterministic synchronization across multiple monitors without I²C bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.15 V to 26 V - supports wide-input DC/DC rails in telecom and server applications without external regulation. |
| Current Sense Accuracy | ±1.45% at 75 mV VSENSE (0°C to +70°C) - enables high-fidelity load current measurement with minimal calibration overhead. |
| Voltage Sense Accuracy | ±0.85% at 3.0–5.5 V input range - ensures precise supply rail monitoring for low-voltage logic domains. |
| ADC Resolution & Speed | 12-bit SAR with 150 µs conversion time - delivers sufficient resolution and latency for real-time power telemetry and fault detection. |
| I²C Interface | Fast-mode compliant (400 kHz) with 16 configurable addresses - allows scalable multi-rail monitoring on a single bus with no address conflicts. |
| Alert Response | ALERTB asserts low within 1–2 µs after SETV threshold breach - provides timely overcurrent signaling to MCU/FPGA for immediate shutdown or throttling. |
| Package | 10-lead MSOP (3 mm × 3 mm) - compact footprint suitable for dense PCB layouts in space-constrained systems. |
Pinout & Package
ADM1191-2ARMZ-R7 is housed in a 10-lead MSOP package with exposed pad (θJA = 137.5°C/W). Pin functions are validated per Analog Devices Rev. C datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 3.15–26 V; includes UVLO reset at 2.8 V rising threshold for robust power sequencing. |
| SENSE (Pin 2) | Current sense differential input | Connects across external shunt resistor; senses voltage drop proportional to load current (max 105.84 mV full-scale). |
| CONV (Pin 3) | Hardware ADC trigger | High-level pulse initiates current/voltage conversion - enables synchronous sampling across multiple ADM1191-2ARMZ-R7 units. |
| GND (Pin 4) | Analog/digital ground reference | Single ground plane required; Kelvin connection recommended for accurate sense voltage capture. |
| SETV (Pin 5) | Overcurrent threshold reference | 0.9–1.9 V input sets trip point via internal comparator; gain of 18× yields 49.5–102 mV effective VSENSE threshold. |
| SCL (Pin 6) | I²C clock input | Open-drain, requires external pull-up; supports 400 kHz fast-mode timing with defined rise/fall constraints. |
| SDA (Pin 7) | I²C bidirectional data | Open-drain, requires external pull-up; handles command writes, register reads, and status polling. |
| A0 (Pin 8) | I²C address LSB | Configurable as GND, high, floating, or resistor-to-ground to select one of 16 device addresses (0x60–0x7E). |
| A1 (Pin 9) | I²C address MSB | Paired with A0 to define 4-bit address extension; supports daisy-chained or distributed monitoring topologies. |
| ALERTB (Pin 10) | Active-low overcurrent flag | Open-drain output; latches until cleared via ALERT_EN register - prevents missed alerts during host polling intervals. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current sense + voltage monitor | Eliminates need for separate amplifiers, ADCs, and level-shifting circuitry - reduces BOM count and layout area. |
| Hardware-activated ADC conversion | CONV pin enables deterministic, jitter-free sampling aligned across multiple devices - critical for phase-matched power analysis. |
| Programmable overcurrent alert threshold | SETV pin accepts analog voltage (0.9–1.9 V) to set trip point with 18× gain - avoids fixed-threshold limitations of comparator-only solutions. |
| 16-device I²C scalability | A0/A1 pins support 16 unique addresses (0x60–0x7E) - permits monitoring of up to 16 independent power rails on one bus without repeaters. |
| 12-bit dual-channel readback | Simultaneous voltage and current digitization with 150 µs conversion - enables real-time power (P = VI) calculation in host firmware. |
Applications
| Server Power Budgeting | Telecom Line Card Monitoring |
|---|---|
Use Scenario: Real-time tracking of CPU, memory, and PCIe rail currents in 1U/2U rack servers to enforce thermal/power envelopes and enable dynamic throttling. IC Role / Device Role / Timing Role: ADM1191-2ARMZ-R7 acts as a local VI sensor at each VRM output, reporting via I²C to BMC for system-level power capping. Use Value: ±1.45% current accuracy and 150 µs conversion enable sub-100 ms response to transient overloads, preventing thermal runaway before fan control loops react. | Use Scenario: Continuous monitoring of +48 V DC feed and individual card supply voltages/currents in carrier-grade DSLAM or OLT line cards. IC Role / Device Role / Timing Role: ADM1191-2ARMZ-R7 serves as a fault-detection node on each card, asserting ALERTB to backplane controller upon overcurrent events. Use Value: 1–2 µs ALERTB response and latching behavior ensure no overcurrent event escapes detection, even during brief bus arbitration delays. |
| Data Center PSU Telemetry | Industrial PC Power Management |
Use Scenario: Embedding in AC/DC and DC/DC power supplies to report input/output VI data to host controller for efficiency mapping and predictive maintenance. IC Role / Device Role / Timing Role: ADM1191-2ARMZ-R7 interfaces directly to PSU microcontroller via I²C, providing calibrated current and voltage samples for firmware-based power analytics. Use Value: 12-bit resolution and ±0.85% voltage accuracy allow precise efficiency calculations across 3.0–26 V input range without external calibration. | Use Scenario: Monitoring 12 V and 5 V rails in ruggedized industrial PCs deployed in factory automation or transportation systems. IC Role / Device Role / Timing Role: ADM1191-2ARMZ-R7 provides redundant overcurrent protection alongside main system supervisor IC, with independent SETV threshold setting. Use Value: Dual alert sources (I²C register + ALERTB pin) enable both software logging and hardware-initiated safe shutdown - meeting SIL-2 functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA226AIDR | 36 V max VBUS, 16-bit delta-sigma ADC, 52 kSPS, no CONV pin, ALERT pin not latching | Better resolution and bandwidth but lacks hardware-synchronized conversion and ALERTB latch | Select when higher precision and faster sampling outweigh need for deterministic multi-device sync. |
| MAX44206ETE+ | 5.5 V max supply, integrated shunt, 12-bit ADC, no I²C, SPI interface only | Lower voltage range, no multi-device addressing, SPI-only communication | Select for cost-sensitive, single-rail, low-voltage applications where SPI is preferred and bus scalability is unnecessary. |
Compared with INA226AIDR and MAX44206ETE+, the ADM1191-2ARMZ-R7 uniquely combines hardware-triggered ADC conversion, latching ALERTB, and 16-device I²C scalability - making it optimal for synchronized, multi-rail monitoring in telecom and server platforms requiring deterministic timing and fault resilience.
Availability
ADM1191-2ARMZ-R7 is available at Aetrix Electronics and suitable for server power budgeting, telecom line card monitoring, and industrial PC power management requiring stable component supply and long-term production continuity.
Supply support for ADM1191-2ARMZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM1191 product line delivers integrated current/voltage monitoring ICs designed specifically for real-time power telemetry in telecom infrastructure, data center equipment, and industrial computing systems.
FAQ
What is the maximum operating voltage for the ADM1191-2ARMZ-R7?
The ADM1191-2ARMZ-R7 supports a VCC operating voltage range of 3.15 V to 26 V, with absolute maximum rating of 30 V on the VCC pin. Operation above 26 V risks violating specified accuracy and may trigger undervoltage lockout recovery behavior if supply dips below 2.8 V.
How does the CONV pin function in the ADM1191-2ARMZ-R7?
The CONV pin on the ADM1191-2ARMZ-R7 initiates an ADC conversion when driven high. Its state configures the part - via I²C registers - to convert current only, voltage only, or both channels. This hardware trigger enables precise synchronization across multiple ADM1191-2ARMZ-R7 devices without I²C bus arbitration delays.
Can the ADM1191-2ARMZ-R7 monitor both voltage and current simultaneously?
The ADM1191-2ARMZ-R7 uses a single 12-bit ADC with a multiplexer to sequentially sample voltage (VCC) and current (SENSE-derived) - not truly simultaneously. However, it supports rapid successive conversions (150 µs each) and stores results in dedicated registers, enabling near-concurrent readback of both parameters for real-time power (P = VI) calculation.
What is the role of the SETV pin on the ADM1191-2ARMZ-R7?
The SETV pin on the ADM1191-2ARMZ-R7 provides an analog reference voltage (0.9 V to 1.9 V) that the internal comparator uses to detect overcurrent conditions. With a fixed gain of 18×, this sets an effective VSENSE trip threshold of 49.5 mV to 102 mV - allowing flexible, non-binary current limiting without external components.
Does the ADM1191-2ARMZ-R7 support multiple devices on the same I²C bus?
Yes, the ADM1191-2ARMZ-R7 supports up to 16 devices on a single I²C bus using the A0 and A1 pins to configure unique 7-bit slave addresses (0x60 to 0x7E). Each pin can be tied low, high, floated, or pulled down with a resistor - enabling scalable multi-rail monitoring without address conflicts or bus repeaters.
ADM1191-2ARMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Monitoring, Digital Current
- Current - Supply:
- 1.7mA
- Voltage - Supply:
- 3.15V ~ 26V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
ADM1191-2ARMZ-R7 FAQ
1.How can I place an order for ADM1191-2ARMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1191-2ARMZ-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 ADM1191-2ARMZ-R7 reliable?
The price and inventory of ADM1191-2ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1191-2ARMZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM1191-2ARMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1191-2ARMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1191-2ARMZ-R7?
ADM1191-2ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1191-2ARMZ-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 ADM1191-2ARMZ-R7?
For technical support, including ADM1191-2ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1191-2ARMZ-R7 requirements.
6.How does Aetrix verify that ADM1191-2ARMZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM1191-2ARMZ-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 ADM1191-2ARMZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM1191-2ARMZ-R7?
All ADM1191-2ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1191-2ARMZ-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 ADM1191-2ARMZ-R7 part is unused and in its original packaging.
Return procedure for ADM1191-2ARMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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