Overview
The LTC2949ILXE#3ZZPBF, produced by Analog Devices Inc., is a high-precision current, voltage, temperature, charge, and energy meter. This integrated circuit is specifically designed for electrical and hybrid vehicles, as well as other isolated current sense applications. It accurately measures and tracks the charge and energy flowing in and out of battery packs by monitoring the voltage drop over up to two sense resistors and the battery pack voltage. The device features low offset ΔΣ ADCs to ensure precise measurements with minimal power loss.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage (AVCC to AGND) | -0.3V | 14.5V | V | ||
| Supply Voltage (DVCC to DGND) | -0.3V | 14.5V | V | ||
| Analog Input Voltage (I1P, I1M, I2P, I2M) | -0.3V | VAVCC + 0.3V | V | ||
| Power ADC Resolution (Slow Mode) | 18 Bit | ||||
| Power ADC Resolution (Fast Mode) | 11 Bit | ||||
| Input Sampling Frequency | 5.24 MHz | ||||
| Operating Temperature Range | -40°C | 125°C | °C |
Key Features
- High-precision measurement of current, voltage, temperature, charge, and energy.
- Low offset ΔΣ ADCs for accurate measurements with minimal power loss.
- Continuous integration of current and power for lossless tracking of charge and energy.
- 12 internally buffered high impedance inputs for measuring voltages from external sensors or resistor dividers.
- Isolated isoSPI or SPI interface for communication with the host.
- Automotive-grade versions available with controlled manufacturing for quality and reliability.
Applications
The LTC2949ILXE#3ZZPBF is primarily used in electrical and hybrid vehicles for battery management. It is also suitable for other isolated current sense applications, such as monitoring high-voltage battery packs, and in various industrial and automotive systems where precise energy and charge tracking are required.
Q & A
- What is the primary function of the LTC2949ILXE#3ZZPBF?
The primary function is to measure and track current, voltage, temperature, charge, and energy in high-voltage battery packs and other isolated current sense applications. - What type of ADCs does the LTC2949 use?
The LTC2949 uses low offset ΔΣ ADCs. - What is the operating temperature range of the LTC2949ILXE#3ZZPBF?
The operating temperature range is -40°C to 125°C. - Does the LTC2949 support isolated communication?
Yes, it supports isolated isoSPI or SPI interface for communication with the host. - Are there automotive-grade versions of the LTC2949 available?
Yes, automotive-grade versions with controlled manufacturing are available, designated with a #3ZZ suffix. - How many high impedance inputs does the LTC2949 have?
The LTC2949 has 12 internally buffered high impedance inputs. - What is the input sampling frequency of the LTC2949?
The input sampling frequency is 5.24 MHz. - What is the power ADC resolution in slow mode?
The power ADC resolution in slow mode is 18 bits. - What is the power ADC resolution in fast mode?
The power ADC resolution in fast mode is 11 bits. - How long is the conversion time in slow mode?
The conversion time in slow mode is 100 ms.
