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Analog Devices Inc./Maxim Integrated DS2761BE/T&R
- Part No.:
- DS2761BE/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DS2761BE/T&R.pdf
- Description:
- IC BATT MONITOR LI-ION 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,748
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Product details
Overview
DS2761BE/T&R from Maxim Integrated is a high-precision lithium-ion battery monitor IC with integrated safety protection, 12-bit bidirectional current measurement, 4.88mV voltage resolution, 0.125°C temperature resolution, and Dallas 1-Wire® interface - deployed in smart battery packs for portable medical devices, power tools, and two-wheeled EVs.
For engineers reviewing the DS2761BE/T&R datasheet, DS2761BE/T&R pinout, DS2761BE/T&R application, or DS2761BE/T&R equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for Li+ pack monitoring and protection system design.
Technical Context
The DS2761BE/T&R implements a dedicated analog front-end with dual-path current sensing (internal 25mΩ or external resistor), on-chip thermal sensor, and precision ADCs for simultaneous voltage, current, and temperature acquisition. Its 1-Wire interface enables single-pin bidirectional communication with host microcontrollers without additional UART or I²C hardware.
It embeds configurable Li+ safety logic including overvoltage (4.35V threshold), undervoltage, charge/discharge overcurrent, and short-circuit detection - each with programmable delays and autonomous FET control via CC and DC outputs. Power management includes active mode (60µA typ) and sleep mode (1µA typ) with wake-up triggers on DQ, PS, or PLS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Measurement | 12-bit bidirectional; ±1.9A dynamic range with internal 25mΩ sense resistor - enables accurate coulomb counting for remaining capacity estimation. |
| Voltage Resolution | 4.88mV over 0–4.75V range - supports precise cell voltage tracking for state-of-charge and overvoltage/undervoltage protection thresholds. |
| Temperature Resolution | 0.125°C using integrated on-die sensor - eliminates need for external thermistors and reduces BOM cost and layout complexity. |
| Overvoltage Threshold | 4.35V (factory-set for DS2761BE variant) - triggers automatic CC output disable to prevent Li+ cell damage during charging. |
| Active Current | 60µA typical - allows continuous monitoring without significant impact on battery standby life in low-power applications. |
| Sleep Current | 1µA typical - ensures minimal self-discharge during storage or idle periods while retaining wake-up capability via PS or PLS pins. |
| Interface | Dallas 1-Wire® with unique 64-bit address - enables daisy-chained multi-battery systems using only one MCU GPIO pin and pull-up resistor. |
Pinout & Package
DS2761BE/T&R is housed in a 16-pin TSSOP package (5.0mm × 4.4mm, 0.65mm pitch), lead-free and RoHS-compliant. Pin functions are validated per Maxim's official DS2761 datasheet Rev. 3 (pages 4–5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CC | Charge Control Output | Drives gate of external p-channel high-side charge FET; goes high to disable charging during overvoltage or charge overcurrent events. |
| DC | Discharge Control Output | Drives gate of external p-channel high-side discharge FET; goes high to cut off load during undervoltage, discharge overcurrent, or short circuit. |
| DQ | 1-Wire Data I/O | Single-wire bidirectional interface with internal 1µA pull-down; supports net addressing and read/write access to registers and memory. |
| PIO | Programmable I/O Pin | Open-drain output/input controlled via special feature register - used to drive LEDs, enable switches, or monitor auxiliary pack components. |
| PLS | Pack Positive Terminal Input | Monitors pack voltage and provides recovery charge path from PLS to VDD for zero-volt battery revival; also detects charger presence. |
| PS | Power Switch Sense Input | Internally pulled up to VDD with 1µA; falling edge wakes device from sleep mode - used for system power-on control via mechanical switch. |
| VIN | Voltage Sense Input | Connects to Li+ cell anode; measures cell voltage with 4.88mV LSB resolution - primary input for OV/UV protection decisions. |
| VDD | Power Supply Input | Accepts 2.5V–5.5V supply; powers internal circuitry and provides reference for internal sense resistor measurements. |
| VSS | Device Ground | Direct connection to battery negative terminal; serves as common reference for all analog measurements and digital logic. |
| SNS | Sense Resistor Connection | Node between internal 25mΩ resistor and external sense resistor; connects to battery negative for current sensing path. |
| IS1 / IS2 | Current Sense Inputs | Filter inputs (4.7kΩ + 0.1µF) measuring differential voltage across sense resistor - determines charge/discharge direction and magnitude. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Volt Battery Recovery | Internal current-limited charge path from PLS to VDD enables safe revival of deeply depleted Li+ cells without external circuitry. |
| Lockable EEPROM (32B) | Two 16-byte blocks support secure storage of immutable battery parameters (e.g., design capacity, chemistry ID); lock prevents accidental overwrite. |
| Current Accumulation | 0.25mAhr LSB with internal sense resistor - provides high-resolution coulomb counting for accurate runtime prediction in portable equipment. |
| Programmable Protection Delays | tOVD, tUVD, tOCD, tSCD configurable via EEPROM - allows tuning of response timing to match specific battery chemistry and application safety requirements. |
| Integrated Temperature Sensing | On-die thermal sensor with 0.125°C resolution eliminates calibration overhead and external component cost versus discrete thermistor solutions. |
Applications
| Medical Portable Infusion Pumps | Industrial Cordless Power Tools |
|---|---|
|
Use Scenario: Real-time monitoring of Li+ battery health during critical drug delivery cycles with strict runtime and safety compliance. IC Role / Device Role / Timing Role: Primary safety monitor and data acquisition node - performs voltage/current/temperature sampling every 3.4ms (voltage) and 88ms (current) to enforce IEC 62366 and UL 2054 limits. Use Value: Prevents thermal runaway via autonomous overcurrent shutdown and enables FDA-submissible battery log data through 1-Wire-accessible EEPROM. |
Use Scenario: High-current discharge monitoring in brushless motor-driven drills and saws where peak loads exceed 15A intermittently. IC Role / Device Role / Timing Role: Dual-path protection controller - uses CC/DC outputs to gate external p-FETs and disables motor drive within <100ms of short-circuit detection. Use Value: Eliminates need for separate current-sense amplifiers and protection ASICs; internal 25mΩ sense resistor supports ±1.9A measurement without board space penalty. |
| Shared-Battery E-Scooters & E-Bikes | Enterprise-Grade Barcode Scanners |
|
Use Scenario: Multi-cell pack supervision in lightweight urban mobility devices requiring accurate SOC estimation across wide temperature ranges (-10°C to 60°C). IC Role / Device Role / Timing Role: Central telemetry agent - acquires temperature (0.125°C resolution), voltage (4.88mV), and current (12-bit) for Kalman filter-based SOC algorithms. Use Value: On-chip temperature compensation of current offset reduces SoC drift to <3% over 500 cycles; 1-Wire interface simplifies firmware integration with main MCU. |
Use Scenario: Duty-cycle optimized battery management in handheld scanners used 8+ hours daily in warehouse logistics environments. IC Role / Device Role / Timing Role: Low-power pack supervisor - operates in sleep mode (1µA) between scan events, waking on PS pin activation to update accumulated current and voltage logs. Use Value: Extends usable battery life by >12% versus always-on monitors; SRAM stores temporary cycle data before batch 1-Wire upload to host. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li+ battery monitoring and protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT | I²C interface only; no 1-Wire; integrated fuel gauge algorithm; requires external sense resistor. | Designed for embedded fuel gauging in smartphones/tablets; lacks autonomous CC/DC FET control outputs. | Choose when host MCU has I²C bandwidth and algorithmic fuel gauging is preferred over discrete protection logic. |
| MAX17048G+T | 1-Wire compatible but no CC/DC outputs; relies on host-controlled external FET drivers; lower current resolution (15.625µV LSB). | Targeted at compact consumer electronics; does not support zero-volt recovery or programmable protection delays. | Choose for space-constrained designs where full autonomous protection is handled externally and ultra-low quiescent current (0.5µA) is critical. |
Compared with DS2761BE/T&R, BQ27426YZFT offers higher-level fuel-gauge intelligence but requires host coordination for protection actions, while MAX17048G+T reduces footprint and sleep current but shifts safety logic responsibility to the system MCU - making DS2761BE/T&R optimal for cost-sensitive, self-contained Li+ pack designs needing both precision metrology and hardware-enforced safety.
Availability
DS2761BE/T&R is available at Aetrix Electronics and suitable for medical portable devices, industrial cordless tools, shared-mobility e-scooters, and enterprise barcode scanners requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DS2761BE/T&R 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and automotive applications.
The DS2761BE/T&R belongs to Maxim's battery management IC product line, engineered specifically for cost-sensitive, high-reliability Li+ battery packs requiring integrated metrology, nonvolatile data storage, and autonomous safety enforcement.
FAQ
What is the overvoltage protection threshold for DS2761BE/T&R?
The DS2761BE/T&R has a factory-programmed overvoltage threshold of 4.35V, which triggers automatic disablement of the CC output to protect the Li+ cell from overcharging. This value is fixed for the BE variant and differs from the 4.275V threshold of the AE variant. The DS2761BE/T&R maintains this threshold across its operating temperature range and does not require external calibration.
Does DS2761BE/T&R support internal or external current-sense resistors?
DS2761BE/T&R supports both configurations: it includes an integrated 25mΩ sense resistor (enabling ±1.9A measurement with 0.625mA LSB), and can also interface with user-selected external resistors via IS1/IS2 pins for customized current range and accuracy. The internal configuration eliminates PCB routing for sense traces and reduces component count in compact battery packs.
How does DS2761BE/T&R handle deeply discharged batteries?
DS2761BE/T&R implements zero-volt battery recovery by enabling a current-limited charge path from the PLS pin to VDD when VIN drops below the undervoltage threshold. This allows safe trickle charging of severely depleted cells (<1.0V) without risking lithium plating, and is activated automatically upon detection of a valid charger on the PLS terminal.
What memory resources are available on DS2761BE/T&R?
DS2761BE/T&R provides 32 bytes of lockable EEPROM (for secure storage of immutable battery parameters), 16 bytes of general-purpose SRAM (for temporary runtime data), and instrumentation registers mapped into a 256-byte linear address space. All EEPROM blocks can be individually locked via the LOCK command to prevent accidental writes during field operation.
Is DS2761BE/T&R pin-compatible with other DS2761 variants?
Yes, DS2761BE/T&R shares identical pinout and package (16-pin TSSOP) with all DS2761 variants including DS2761AE/T&R and DS2761BE+025/T&R. Differences are limited to overvoltage threshold (4.35V vs. 4.275V) and sense resistor configuration (external vs. internal), allowing drop-in replacement in most layouts without PCB revision.
DS2761BE/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Fault Protection:
- Over Current, Over/Under Voltage, Short Circuit
- Interface:
- 1-Wire
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
DS2761BE/T&R FAQ
1.How can I place an order for DS2761BE/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2761BE/T&R 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 DS2761BE/T&R reliable?
The price and inventory of DS2761BE/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2761BE/T&R is usually 5 days.
3.What payment methods are accepted for DS2761BE/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2761BE/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2761BE/T&R?
DS2761BE/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2761BE/T&R 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 DS2761BE/T&R?
For technical support, including DS2761BE/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2761BE/T&R requirements.
6.How does Aetrix verify that DS2761BE/T&R is sourced from the original manufacturer or authorized distributors?
All DS2761BE/T&R 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 DS2761BE/T&R meets industry standards.
7.What is the process for return or replacement of DS2761BE/T&R?
All DS2761BE/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS2761BE/T&R, 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 DS2761BE/T&R part is unused and in its original packaging.
Return procedure for DS2761BE/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS2761BE/T&R Tags
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