Overview
The LTC6811IG-1#3ZZPBF, produced by Analog Devices Inc., is a multicell battery stack monitor designed to measure up to 12 series-connected battery cells with high accuracy. This device is part of the LTC6811 family, which is renowned for its precise cell voltage measurements, with a total measurement error of less than 1.2mV. The LTC6811 is suitable for most battery chemistries, given its cell measurement range of 0V to 5V. It features an isoSPI interface for high-speed, RF-immune, and long-distance communications, making it ideal for monitoring long, high-voltage battery strings.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Cell Measurement Range | 0 | 5 | V | ||
| Total Measurement Error | 1.2mV | ||||
| Measurement Time for 12 Cells | 290µs | ||||
| Digital Supply Voltage (VREGD) | 2.7 | 3 | 3.6 | V | |
| Output Voltage (DRIVE) | 1µA | 5.4 | 5.7 | 6.1 | V |
| Output Voltage (DRIVE) | 500µA | 5.1 | 5.7 | 6.1 | V |
| Thermal Shutdown Temperature | 150°C | ||||
| Operating Temperature Range | -40°C | 85°C (I Grade), 125°C (H Grade) |
Key Features
- Measures up to 12 series-connected battery cells with high accuracy.
- Cell measurement range of 0V to 5V, suitable for most battery chemistries.
- Fast measurement time: all 12 cells can be measured in 290µs.
- isoSPI interface for high-speed, RF-immune, and long-distance communications.
- Multiple devices can be connected in series for monitoring long, high-voltage battery strings.
- General-purpose I/O pins and a watchdog timer for additional functionality.
- Available in automotive and industrial grades with different operating temperature ranges.
Applications
The LTC6811IG-1#3ZZPBF is widely used in various battery management systems, including electric vehicles, renewable energy systems, and industrial power backup systems. Its high accuracy and fast measurement capabilities make it suitable for monitoring and managing large battery stacks. Other applications include:
- Electric and hybrid electric vehicles.
- Renewable energy systems such as solar and wind power storage.
- Industrial power backup and energy storage systems.
- High-performance battery management in data centers and telecommunications.
Q & A
- What is the primary function of the LTC6811IG-1#3ZZPBF?
The primary function is to measure the voltage of up to 12 series-connected battery cells with high accuracy. - What is the total measurement error of the LTC6811IG-1#3ZZPBF?
The total measurement error is less than 1.2mV. - What is the cell measurement range of the LTC6811IG-1#3ZZPBF?
The cell measurement range is from 0V to 5V. - How long does it take to measure all 12 cells?
All 12 cells can be measured in 290µs. - What interface does the LTC6811IG-1#3ZZPBF use for communications?
The device uses an isoSPI interface for high-speed, RF-immune, and long-distance communications. - Can multiple LTC6811 devices be connected in series?
Yes, multiple devices can be connected in series to monitor long, high-voltage battery strings. - What are the operating temperature ranges for the LTC6811IG-1#3ZZPBF?
The operating temperature ranges are -40°C to 85°C for the I grade and -40°C to 125°C for the H grade. - What does the #3ZZ suffix in the part number indicate?
The #3ZZ suffix indicates that the parts are tested across all temperatures in the lot, and it also pertains to the packaging aspect, specifically tray packaging. - What are some common applications of the LTC6811IG-1#3ZZPBF?
Common applications include electric and hybrid electric vehicles, renewable energy systems, industrial power backup systems, and high-performance battery management in data centers and telecommunications. - Does the LTC6811IG-1#3ZZPBF have any additional functionality besides cell voltage measurement?
Yes, it includes general-purpose I/O pins and a watchdog timer for additional functionality.
