Overview
The LTC6804HG-1#3ZZTRPBF, produced by Analog Devices Inc., is a third-generation multicell battery stack monitor. This device is designed to measure up to 12 series-connected battery cells with high accuracy, making it suitable for various battery chemistries. The LTC6804HG-1 features an isoSPI interface for high-speed, RF-immune communication and supports both daisy-chain and parallel connections to a host processor. It includes onboard passive balancing for each cell, an integrated 5V regulator, and five general-purpose I/O lines. The device can operate over a wide temperature range and is optimized for low power consumption, especially in sleep mode.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Measurement Resolution | 0.1 | mV/bit | ||
| ADC Offset Voltage | 0.1 | mV | ||
| ADC Gain Error | 0.01 | 0.02 | % | |
| Total Measurement Error (TME) in Normal Mode | ±0.2 | ±0.1 | ±0.8 | mV |
| V+ Supply Voltage | 11 | 40 | 55 | V |
| VREG Supply Voltage | 4.5 | 5 | 5.5 | V |
| VREGD Digital Supply Voltage | 2.7 | 3.0 | 3.6 | V |
| Thermal Shutdown Temperature | 150 | °C | ||
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Measures up to 12 series-connected battery cells with a total measurement error of less than 1.2mV.
- Cell measurement range of 0V to 5V, suitable for most battery chemistries.
- High-speed isoSPI interface for RF-immune local area communications.
- Supports daisy-chain and parallel connections to a host processor.
- Onboard 5V regulator and passive balancing for each cell.
- Five general-purpose I/O lines.
- Low power consumption, with sleep mode current reduced to 4µA.
- Can be powered directly from the battery or from an isolated supply.
Applications
The LTC6804HG-1 is widely used in various battery management systems, particularly in electric vehicles, renewable energy systems, and other applications requiring precise monitoring of battery stacks. Its high accuracy and robust communication capabilities make it an ideal choice for managing long, high-voltage battery strings.
Q & A
- What is the maximum number of battery cells the LTC6804HG-1 can monitor?
The LTC6804HG-1 can monitor up to 12 series-connected battery cells. - What is the measurement resolution of the LTC6804HG-1?
The measurement resolution is 0.1 mV/bit. - What is the total measurement error (TME) in normal mode?
The TME in normal mode is ±0.2 mV to ±0.8 mV. - What is the operating temperature range of the LTC6804HG-1?
The operating temperature range is -40°C to 125°C. - How does the LTC6804HG-1 communicate with the host processor?
The LTC6804HG-1 uses a high-speed isoSPI interface for RF-immune local area communications. - Can multiple LTC6804 devices be connected in series or parallel?
Yes, multiple devices can be connected in either a daisy-chain or parallel configuration to the host processor. - What is the power consumption in sleep mode?
The power consumption in sleep mode is reduced to 4µA. - Does the LTC6804HG-1 have onboard voltage regulation?
Yes, it includes an onboard 5V regulator. - What is the purpose of the general-purpose I/O lines?
The five general-purpose I/O lines can be used for various control and monitoring functions. - Is the LTC6804HG-1 RoHS and WEEE compliant?
Yes, parts ending with PBF are RoHS and WEEE compliant.
