Overview
The LTC3337ACBZ-R7, produced by Analog Devices Inc., is a primary battery state of health (SOH) monitor integrated with a precision coulomb counter. This device is designed to be placed in series with a primary battery, ensuring minimal series voltage drop. It features an infinite dynamic range coulomb counter that accurately tallies all accumulated battery discharge and stores this data in an internal register accessible via an I2C interface. The LTC3337 also monitors and reports battery voltage, impedance, and temperature, making it a comprehensive solution for battery health monitoring.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Battery Input Voltage Range (BAT_IN) | 1.8 | 5.5 | V | |
| AVCC Voltage Range | 1.8 | 5.5 | V | |
| Quiescent Current | 100 | nA | ||
| Peak Input Current Limits | 5 | 100 | mA | |
| Clock Operating Frequency (fSCL) | 400 | kHz | ||
| Operating Junction Temperature Range | -40 | 125 | °C |
Key Features
- Precision coulomb counter with infinite dynamic range
- Programmable discharge alarm threshold with interrupt generation
- Monitoring of battery voltage, impedance, and temperature via I2C interface
- Peak input current limit selectable from 5mA to 100mA
- Low quiescent current of 100nA
- Support for supercapacitor balancing (optional)
- Available in 12-lead 2mm × 2mm LFCSP and 16-ball 1.64mm × 1.64mm WLCSP packages
Applications
The LTC3337ACBZ-R7 is suitable for various applications requiring precise battery state of health monitoring, including:
- Battery-powered devices where accurate discharge tracking is crucial
- Industrial and consumer electronics with primary battery power sources
- Energy harvesting systems that require precise energy storage monitoring
- Supercapacitor-based systems where balancing and monitoring are necessary
Q & A
- What is the primary function of the LTC3337ACBZ-R7?
The primary function is to monitor the state of health (SOH) of a primary battery with a built-in precision coulomb counter. - What is the input voltage range for the LTC3337ACBZ-R7?
The input voltage range is from 1.8V to 5.5V. - What is the quiescent current of the LTC3337ACBZ-R7?
The quiescent current is 100nA. - How is the peak input current limit set for the LTC3337ACBZ-R7?
The peak input current limit is selectable from 5mA to 100mA via pin configuration. - What additional parameters does the LTC3337ACBZ-R7 monitor besides coulomb count?
Besides coulomb count, it monitors battery voltage, impedance, and temperature. - What interface is used for data communication with the LTC3337ACBZ-R7?
Data communication is via an I2C interface. - What are the available package options for the LTC3337ACBZ-R7?
It is available in 12-lead 2mm × 2mm LFCSP and 16-ball 1.64mm × 1.64mm WLCSP packages. - Does the LTC3337ACBZ-R7 support supercapacitor balancing?
Yes, it supports supercapacitor balancing (optional). - What is the operating junction temperature range for the LTC3337ACBZ-R7?
The operating junction temperature range is from -40°C to 125°C. - How is the discharge alarm threshold set for the LTC3337ACBZ-R7?
The discharge alarm threshold is programmable, and when reached, it generates an interrupt at the IRQ pin.
