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Analog Devices Inc./Maxim Integrated DS2756E+T&R
- Part No.:
- DS2756E+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DS2756E+T&R.pdf
- Description:
- IC BATT MON LI-ION 1CELL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
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Product details
Overview
DS2756E+T&R from Maxim Integrated is a high-accuracy 1-cell Li+/polymer battery fuel gauge IC with integrated coulomb counting, temperature/voltage/current sensing, and programmable suspend mode. It delivers ±2% current accumulation accuracy over ±64mV input range, 10-bit temperature resolution (0.125°C), and operates in an 8-pin TSSOP package for space-constrained battery-pack monitoring.
For engineers reviewing the DS2756E+T&R datasheet, DS2756E+T&R pinout, DS2756E+T&R application, or DS2756E+T&R equivalent, this page provides verified technical context, real-world design meanings of key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-chain support details specific to OEM battery-pack integration.
Technical Context
The DS2756E+T&R implements a dedicated analog front-end with differential current-sense inputs (IS1/IS2), on-chip thermal sensor, and precision voltage reference to support real-time battery state estimation. Its 1-Wire interface enables single-wire bidirectional communication at 16kbps or 143kbps with unique 64-bit addressing for multi-battery systems.
It features three power modes-Active (100μA typical), Suspend (1.5–4μA), and Sleep (1–3μA)-with programmable thresholds for automatic transition based on current, temperature, or undervoltage conditions. Accumulated Current Register (ACR) backup to EEPROM ensures data retention across power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Accuracy | ±2% ±4μV over ±64mV input range - enables precise coulomb counting for remaining capacity estimation in Li+ packs |
| Temperature Resolution | 10-bit, 0.125°C - supports accurate thermal profiling without external thermistors |
| Voltage Measurement | 10-bit average updated every 4ms - provides stable cell voltage tracking for charge/discharge control |
| Supply Current (Suspend) | 1.5–4μA - extends battery-pack standby life during low-current states |
| Memory | 96 bytes lockable EEPROM + 8 bytes SRAM - stores calibrated parameters and volatile alarm thresholds |
| Interface | Dallas 1-Wire with 64-bit ROM ID - allows daisy-chaining and individual addressing in multi-cell configurations |
| Package | 8-pin TSSOP (3.0mm × 4.4mm) - mounts directly on side of thin prismatic Li+ cells |
Pinout & Package
DS2756E+T&R is housed in an 8-pin TSSOP package (3.0mm × 4.4mm), optimized for side-mounting on compact Li+/polymer battery cells.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Battery voltage sense input | Measures pack voltage (0–4.5V) for state-of-charge and protection logic |
| VSS | Ground and current-sense resistor return | Common reference for all analog measurements and sense-resistor connection point |
| PIO | Programmable I/O or interrupt output | Configurable as wake-up signal for MCU during suspend, or general-purpose digital I/O |
| VDD | Supply input (3.0–4.5V) | Powers internal circuitry; requires 0.1μF bypass capacitor to VSS |
| IS1 / IS2 | Differential current-sense filter inputs | Accept filtered voltage drop across external sense resistor (RSNS); enable RC filtering via 10kΩ internal resistors |
| SNS | Sense resistor pack-side connection | Connects to high-side of current-sense resistor; completes differential measurement path with VSS |
| DQ | 1-Wire data I/O | Single-wire serial interface supporting standard (16kbps) or overdrive (143kbps) timing; also serves as optional alarm interrupt |
Key Features
| Feature | Design Value |
|---|---|
| Programmable suspend mode | Reduces average current to ~10μA by cycling between active/suspend states based on user-defined current thresholds |
| Offset accumulation blanking (OBEN) | Eliminates drift error from small positive offsets during long-term coulomb counting (e.g., blanks 0.78–3.125mA with 20mΩ RSNS) |
| Automatic ACR EEPROM backup | Writes Accumulated Current Register (ACR) to EEPROM every 100μVh change - preserves charge history across power loss |
| Snapshot mode | Captures instantaneous voltage/current for peak power analysis without disrupting ongoing averaging or accumulation |
| Lockable EEPROM | Secures critical battery parameters (e.g., calibration data) as read-only ROM after locking - prevents accidental overwrite |
Applications
| Smartphone Battery Pack | Tablet Power Management |
|---|---|
Use Scenario: Real-time fuel gauging and thermal monitoring inside slim Li+ battery modules. IC Role / Device Role / Timing Role: Primary coulomb counter and temperature sensor; performs 2.8s averaged current updates and 220ms temperature reads. Use Value: Enables accurate remaining capacity reporting (<±5% error) and safe thermal shutdown before cell damage occurs. | Use Scenario: Multi-cell battery management in portable computing devices requiring low quiescent current. IC Role / Device Role / Timing Role: Standby-mode fuel gauge with suspend-triggered wake-up; uses PIO to alert host MCU when load exceeds threshold. Use Value: Extends shelf-life and idle runtime by reducing average current to <10μA during light-load periods. |
| Wearable Health Monitor | Bluetooth Earbud Battery |
Use Scenario: Compact wearable with tight PCB space and strict power budget. IC Role / Device Role / Timing Role: Single-wire fuel gauge co-located on battery flex; leverages 3mm TSSOP footprint and 1-Wire for minimal interconnect. Use Value: Eliminates need for separate ADC/microcontroller, saving board area and BOM cost while maintaining ±2% capacity accuracy. | Use Scenario: Ultra-thin earbud battery with side-mounted electronics. IC Role / Device Role / Timing Role: Voltage/current/temperature acquisition engine; uses VIN/SNS/IS1/IS2 pins for full analog sensing in minimal footprint. Use Value: Supports precise end-of-charge detection and fast-charge termination using 4.88mV voltage resolution and 15-bit average current updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT | Integrated impedance track algorithm; I²C interface; no 1-Wire support | Requires host microcontroller with I²C; lacks single-wire simplicity and multi-drop capability | Choose for higher SoC estimation accuracy in systems with processing headroom and I²C availability |
| MAX17048G+T | ModelGauge m3 algorithm; 1.8V–4.5V supply; 12-bit ADC resolution only | Lower current measurement resolution (12-bit vs DS2756E+T&R's 15-bit average); no suspend-mode current optimization | Choose for simpler firmware integration where ultra-low suspend current is not required |
Compared with BQ27426YZFT and MAX17048G+T, the DS2756E+T&R offers superior low-power suspend operation (1.5–4μA), native 1-Wire multi-drop support, and higher-resolution current accumulation (15-bit average), making it optimal for space- and power-constrained single-cell Li+ packs without host processor overhead.
Availability
DS2756E+T&R is available at Aetrix Electronics and suitable for smartphone battery packs, tablet power management systems, wearable health monitors, and Bluetooth earbud battery modules requiring stable component supply and long-term lifecycle support.
Supply support for DS2756E+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and consumer applications.
The DS2756E+T&R belongs to Maxim's battery fuel gauge product line, engineered specifically for cost-sensitive, space-constrained 1-cell Li+/polymer battery-pack monitoring with minimal external components and ultra-low quiescent current.
FAQ
What is the primary function of the DS2756E+T&R in a battery system?
The DS2756E+T&R serves as a high-accuracy battery fuel gauge IC that performs real-time coulomb counting, temperature sensing, and voltage monitoring for 1-cell Li+/polymer batteries. It integrates precision analog measurement, nonvolatile data storage, and programmable power modes into a single 8-pin TSSOP device. The DS2756E+T&R enables reliable remaining capacity estimation, thermal safety monitoring, and low-power suspend operation - all critical for modern portable electronics battery management.
How does the DS2756E+T&R achieve ±2% current accumulation accuracy?
The DS2756E+T&R achieves ±2% current accumulation accuracy through a combination of hardware and firmware techniques: a precision differential current-sense amplifier with ±4μV offset over ±64mV input range, continuous internal offset cancellation, 15-bit average current sampling updated every 2.8s, and automatic EEPROM backup of the Accumulated Current Register (ACR) every 100μVh change. These features ensure stable, drift-resistant coulomb counting even during extended operation - a core capability of the DS2756E+T&R.
Can the DS2756E+T&R operate without an external microcontroller?
No, the DS2756E+T&R requires a host system to configure registers, read measurement data, and manage alarms via its 1-Wire interface. It does not contain embedded firmware or autonomous decision logic. However, its programmable suspend mode and PIO/DQ interrupt outputs significantly reduce host polling overhead - the DS2756E+T&R can autonomously trigger wake-up events when current or temperature thresholds are exceeded, enabling efficient low-power system architecture.
What is the role of the PIO pin in DS2756E+T&R applications?
The PIO pin in the DS2756E+T&R serves dual roles: as a general-purpose programmable I/O (digital input/output) or as an interrupt output for suspend or alarm events. When configured as a suspend interrupt, PIO signals current threshold breaches to wake up a host MCU; when used for alarm comparison, it alerts on accumulated current or temperature limit violations. Its ability to operate several volts above VDD makes the PIO pin compatible with higher-voltage system rails - a key design flexibility built into the DS2756E+T&R.
Does the DS2756E+T&R support multiple battery packs on a single 1-Wire bus?
Yes, the DS2756E+T&R supports multi-battery operation via its factory-programmed unique 64-bit ROM address, enabling individual addressing on a shared 1-Wire bus. This allows a single host controller to monitor multiple battery packs simultaneously without additional hardware - a feature explicitly documented in the DS2756E+T&R datasheet and central to its use in systems like multi-bay chargers or modular power banks.
DS2756E+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- 1-Wire
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
DS2756E+T&R FAQ
1.How can I place an order for DS2756E+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2756E+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 DS2756E+T&R reliable?
The price and inventory of DS2756E+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 DS2756E+T&R is usually 5 days.
3.What payment methods are accepted for DS2756E+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2756E+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2756E+T&R?
DS2756E+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2756E+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 DS2756E+T&R?
For technical support, including DS2756E+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2756E+T&R requirements.
6.How does Aetrix verify that DS2756E+T&R is sourced from the original manufacturer or authorized distributors?
All DS2756E+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 DS2756E+T&R meets industry standards.
7.What is the process for return or replacement of DS2756E+T&R?
All DS2756E+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS2756E+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 DS2756E+T&R part is unused and in its original packaging.
Return procedure for DS2756E+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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