My Inquiry
My Account
Analog Devices Inc. ADM1041ARQZ
- Part No.:
- ADM1041ARQZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADM1041ARQZ.pdf
- Description:
- IC SECONDARY SIDE CTRLR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,075
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM1041ARQZ from Analog Devices is a secondary-side controller IC for N+1 redundant server power supplies, providing voltage regulation, current sharing, OrFET control, and comprehensive fault detection including overvoltage, undervoltage, overcurrent, overtemperature, and reverse-voltage protection. It integrates a 2.5 V precision reference, SMBus/I²C interface, and 352-byte field EEPROM. Its primary circuit role is generating optocoupler-driven error signals to regulate primary-side PWM controllers in isolated DC-DC systems.
For engineers reviewing the ADM1041ARQZ datasheet, ADM1041ARQZ pinout, ADM1041ARQZ application, or ADM1041ARQZ equivalent, this device is selected for high-reliability secondary-side housekeeping in telecom and datacenter power modules where digital calibration, differential remote sensing, and fault-robust OrFET gate drive are required - not for general-purpose voltage monitoring or standalone linear regulation.
Technical Context
The ADM1041ARQZ implements a closed-loop secondary-side control architecture with three core analog inputs: differential load voltage sense (VS+/VS−), differential current sense (CS+/CS−), and current share bus (SHRO/SHRS). These feed dedicated error amplifiers whose outputs combine into VCMP - an optocoupler-compatible error signal driving the primary-side PWM.
It supports dual current-sense topologies (shunt resistor or current transformer), programmable soft-start slew rate, digitally trimmed thresholds for OVP/UVP/OCP/OTP, and SMBus-configurable timing delays, debounce, and gain calibration. All trimming parameters are stored in on-chip EEPROM, enabling field reconfiguration without hardware changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply | 4.5 V to 5.5 V - powers all analog and digital blocks; includes UVLO with 4.3 V start threshold and 0.3 V hysteresis |
| 2.5 V Reference | 2.49–2.51 V output at 1 mA - low-drift (±100 ppm/°C), used for ADC references and internal comparators |
| Differential Voltage Sense | VS+ input up to VDD−2 V, VS− down to 0.5 V - enables accurate remote sensing across PCB traces with 1.7–2.3 V nominal VNOM range |
| Current Sense Gain | 65× to 230× programmable - supports 9.5–44.5 mV input ranges for shunt-based sensing; ±3% total error (chopper ON) |
| SMBus Interface | I²C-compatible, 400 kHz max clock - provides full register access to 352-byte field EEPROM and 160-byte calibration memory |
| OrFET Gate Drive | Open-drain N-channel FG output - sinks ≥55 mA to drive external MOSFET gate; detects reverse voltage via CS−/FD comparator |
| Operating Temp | −40°C to +85°C - qualified for industrial and server power supply environments with junction limit of 150°C |
Pinout & Package
ADM1041ARQZ is housed in a 24-lead QSOP package (5.3 mm × 7.6 mm, 0.635 mm pitch) with exposed pad for thermal performance. Pin functions are validated per Analog Devices Rev. A datasheet Figures 1, 14, and pin configuration table (Page 14).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary supply input | 5 V rail powering all internal analog/digital circuits; includes UVLO and overvoltage protection |
| VS+, VS− | Differential remote voltage sense inputs | Measure load output voltage at point-of-load; reject common-mode noise and trace IR drop |
| CS+, CS− | Differential current sense inputs | Accept shunt-resistor voltage drop or current-transformer output; support gain programming and offset trim |
| SHRO, SHRS+ | Current share bus drive/receive | Drive shared bus for master/slave current balancing; SHRO is open-drain output, SHRS+ is input with 100 kΩ impedance |
| FG | OrFET gate driver output | Open-drain N-channel output controlling external MOSFET; asserts low during reverse-voltage fault |
| VCMP | Voltage error amplifier output | Rail-to-rail output driving optocoupler LED; closes feedback loop to primary-side PWM controller |
| SCL, SDA | SMBus serial interface | I²C-compatible bidirectional bus for configuration, monitoring, and EEPROM read/write |
| AC_OK, DC_OK | Power status flag outputs | Programmable open-drain outputs indicating AC mains presence or regulated DC output OK |
Key Features
| Feature | Design Value |
|---|---|
| Digital calibration via EEPROM | 160-byte dedicated calibration memory stores gain/offset trims for voltage, current, and temperature channels - eliminates manual potentiometers and factory calibration fixtures |
| Differential remote voltage sense | VS+/VS− inputs with 35 kΩ/500 kΩ input resistances enable precise point-of-load regulation despite PCB trace resistance - critical for <1% output tolerance in server PSUs |
| OrFET reverse-voltage protection | Integrated FD/FS comparator detects reverse current across external MOSFET and shuts down FG within 2 µs - prevents single-point failure from shorted rectifier or capacitor |
| Configurable SMBus timing & debounce | Registers allow independent programming of PSON debounce (0–160 ms), DC_OK delays (200–1600 ms), and OVP/UVP noise filters (5–600 µs) - adapts to diverse system transient profiles |
| Multi-source current sensing | Supports both shunt resistor (ISENSE mode) and current transformer (ICT mode) inputs with separate gain tables and calibration registers - accommodates high-efficiency or high-isolation designs |
Applications
| Server Power Supply Housekeeping | N+1 Redundant DC-DC Module |
|---|---|
Use Scenario: Managing output voltage, current balance, and fault response in 12 V or 48 V hot-swap server PSUs with multiple parallel units. IC Role / Device Role / Timing Role: Secondary-side controller generating optocoupler-coupled VCMP error signal and coordinating OrFET shutdown during faults. Use Value: Enables zero manual calibration, reduces BOM count by replacing discrete op-amps/comparators, and ensures graceful failover during single-unit faults. |
Use Scenario: Implementing current sharing across ≥2 identical power modules feeding a common bus in telecom shelf systems. IC Role / Device Role / Timing Role: Master/slave current share controller using SHRO/SHRS bus to equalize load current within ±1% tolerance. Use Value: Eliminates need for external current-sharing resistors or DACs; achieves stable load division even with mismatched transformer turns or MOSFET RDS(on). |
| High-Efficiency ORing Circuit Control | Intelligent Power Supply Monitoring |
Use Scenario: Replacing Schottky ORing diodes with low-RDS(on) MOSFETs in redundant 12 V distribution networks. IC Role / Device Role / Timing Role: Reverse-voltage detector and fast gate driver (FG pin) that disables OrFET within 2 µs of fault detection. Use Value: Reduces conduction loss by >70% vs. diode ORing, while preventing bus collapse during catastrophic downstream shorts. |
Use Scenario: Real-time health monitoring of voltage, temperature, and AC input status in modular power supplies with microcontroller supervision. IC Role / Device Role / Timing Role: Multi-channel analog monitor with SMBus-accessible registers for MON1–MON4, OTP (MON5), AC_OK, and DC_OK flags. Use Value: Provides calibrated, time-stamped fault logs via 352-byte field EEPROM - supports predictive maintenance and root-cause analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary-side power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCD9248PFCR | Digital multiphase PWM controller with integrated ADCs and PMBus; requires external MCU for sequencing; no native OrFET control | Targeted at high-current VRMs with phase interleaving; lacks analog VCMP output for optocoupler coupling | Choose UCD9248PFCR only when migrating to fully digital control with PMBus host; not suitable for analog optocoupler-based legacy PSU designs. |
| LTC4258IGN#PBF | Hot-swap controller with integrated current limiting and I²C telemetry; no voltage regulation, current sharing, or VCMP generation | Focused on inrush limiting and overcurrent protection at board-level insertion; no secondary-side feedback loop capability | Select LTC4258IGN#PBF for standalone hot-swap protection only; cannot replace ADM1041ARQZ's voltage regulation, current share, or OrFET functions. |
Compared with UCD9248PFCR and LTC4258IGN#PBF, the ADM1041ARQZ uniquely delivers analog optocoupler-compatible VCMP output, integrated current sharing bus, and hardware-accelerated OrFET control - making it irreplaceable in cost-sensitive, analog-feedback N+1 server PSUs requiring minimal external components and field-programmable calibration.
Availability
ADM1041ARQZ is available at Aetrix Electronics and suitable for network server power supplies, telecom DC-DC modules, and redundant industrial power systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADM1041ARQZ 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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The ADM1041ARQZ belongs to Analog Devices' Power Management IC product line, engineered specifically for secondary-side control in isolated, redundant power supplies - emphasizing reliability, calibration flexibility, and integration of voltage, current, and fault management functions.
FAQ
What is the primary function of the ADM1041ARQZ in a power supply system?
The ADM1041ARQZ serves as a secondary-side controller that regulates output voltage, balances current across redundant modules, and manages OrFET-based ORing circuits. It generates the VCMP error signal sent via optocoupler to the primary-side PWM controller. In the ADM1041ARQZ, this is achieved through differential remote sensing, programmable current-sense gain, and integrated fault protection - eliminating manual calibration and reducing external component count in server-grade PSUs.
Does the ADM1041ARQZ support both shunt resistor and current transformer current sensing?
Yes, the ADM1041ARQZ supports two distinct current sensing modes: ISENSE (shunt resistor) and ICT (current transformer), selected via Reg 17h[7]. In ISENSE mode, it accepts differential inputs at CS+/CS− with gain settings from 65× to 230×. In ICT mode, it processes single-ended signals at ICT pin with configurable gain (4.5× or 2.57×) and source current trimming. Both modes are fully supported in the ADM1041ARQZ datasheet Rev. A and validated in application circuits.
How does the ADM1041ARQZ implement OrFET control and reverse-voltage protection?
The ADM1041ARQZ uses its FG pin as an open-drain N-channel driver to control the gate of an external OrFET MOSFET. It monitors reverse voltage across the FET via the FD/FS comparator, which triggers FG shutdown within 2 µs when reverse current exceeds programmable thresholds (100–250 mV). This action isolates the faulty module without collapsing the shared output bus - a core safety feature implemented in hardware within the ADM1041ARQZ, not reliant on firmware or SMBus polling.
What type of EEPROM is integrated into the ADM1041ARQZ and how is it used?
The ADM1041ARQZ integrates two EEPROM blocks: 160 bytes dedicated to factory and field calibration data (gain/offset trims), and 352 bytes for general field-use data storage. Both are accessed via SMBus and support 100,000+ write cycles with 100-year data retention at 55°C. In the ADM1041ARQZ, this enables post-manufacture calibration updates, runtime fault logging, and configuration persistence across power cycles - critical for field-deployed server PSUs.
Can the ADM1041ARQZ operate without a microcontroller, and what features enable standalone operation?
Yes, the ADM1041ARQZ supports fully standalone operation. Key enablers include internal state machines for soft-start ramp control, autonomous current share arbitration, self-timed fault responses (e.g., immediate FG shutdown on reverse voltage), and default SMBus register values that configure basic OVP/UVP thresholds at power-up. The ADM1041ARQZ requires no external MCU to perform voltage regulation, current balancing, or OrFET protection - though SMBus connectivity remains available for optional supervisory control.
ADM1041ARQZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Power Supply, Servers
- Voltage - Input:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply:
- 6 mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
ADM1041ARQZ FAQ
1.How can I place an order for ADM1041ARQZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1041ARQZ 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 ADM1041ARQZ reliable?
The price and inventory of ADM1041ARQZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1041ARQZ is usually 5 days.
3.What payment methods are accepted for ADM1041ARQZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1041ARQZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1041ARQZ?
ADM1041ARQZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1041ARQZ 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 ADM1041ARQZ?
For technical support, including ADM1041ARQZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1041ARQZ requirements.
6.How does Aetrix verify that ADM1041ARQZ is sourced from the original manufacturer or authorized distributors?
All ADM1041ARQZ 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 ADM1041ARQZ meets industry standards.
7.What is the process for return or replacement of ADM1041ARQZ?
All ADM1041ARQZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM1041ARQZ, 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 ADM1041ARQZ part is unused and in its original packaging.
Return procedure for ADM1041ARQZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1041ARQZ Tags
-
UC3845AD8TR
Texas Instruments
-
UC2843AD8TR
Texas Instruments
-
LM3880MFX-1AE/NOPB
Texas Instruments
-
LM3880MFX-1AA/NOPB
Texas Instruments
-
INA234AIYBJR
Texas Instruments
-
INA700AYWFR
Texas Instruments
-
LM3880MF-1AE/NOPB
Texas Instruments
-
LM3880MF-1AA/NOPB
Texas Instruments
-
LM3881MM/NOPB
Texas Instruments
-
UCC2802DTR
Texas Instruments
-
NCP4305DMTTWG
onsemi
-
INA237AIDGSR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
