Overview
The AD7294BSUZ from Analog Devices Inc. is a highly integrated, single-chip solution designed for general-purpose monitoring and control of current, voltage, and temperature. This device is fabricated using Analog Devices' high voltage DMOS process, ensuring high voltage compliance up to 59.4 V on the current sense inputs and up to 15 V on the DAC outputs. It is particularly suited for applications requiring precise control and monitoring, such as cellular base stations and various industrial control systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature | -40 | 105 | °C | ||
| Voltage Supply | 4.5 | 5.5 | V | Analog and Digital | |
| Current Sense Input Voltage | 59.4 | V | High voltage compliance | ||
| DAC Output Voltage | 0 | 15 | V | 12-bit resolution | |
| ADC Conversion Time | 3 | μs | SAR ADC | ||
| Internal Temperature Sensor Accuracy | ±2 | ±2.5 | °C | TA = -30°C to +90°C, TA = -40°C to +105°C | |
| External Temperature Sensor Range | -55 | 150 | °C | Limited by external diode |
Key Features
- Low voltage (±200 mV) analog input sense amplifiers for current monitoring across shunt resistors.
- Two external diode temperature sensor inputs with a measurement range of -55°C to +150°C and ±2°C accuracy.
- One internal temperature sensor with ±2°C accuracy.
- Four uncommitted analog input channels multiplexed into a SAR ADC with a 3 μs conversion time.
- Four 12-bit monotonic DACs with 0 V to 10 V offset, 5 V span, and 8 μs settling time.
- 10 mA sink and source capability for DAC outputs.
- Internal 2.5 V reference for both DAC and ADC.
- 2-wire fast mode I2C interface.
- Programmable alert thresholds and hysteresis.
- Minimum/maximum recorder for each channel.
Applications
- Cellular base stations (GSM, EDGE, UMTS, CDMA, TD-SCDMA, W-CDMA, WiMAX).
- Point-to-multipoint and other RF transmission systems.
- 12 V, 24 V, 48 V automotive applications.
- Industrial controls.
Q & A
- What is the operating temperature range of the AD7294BSUZ?
The operating temperature range is -40°C to +105°C.
- What is the voltage supply range for the AD7294BSUZ?
The voltage supply range is 4.5 V to 5.5 V.
- What is the maximum voltage compliance for the current sense inputs?
The maximum voltage compliance for the current sense inputs is 59.4 V.
- How many DACs does the AD7294BSUZ have, and what is their resolution?
The AD7294BSUZ has four 12-bit DACs.
- What is the conversion time of the SAR ADC in the AD7294BSUZ?
The conversion time of the SAR ADC is 3 μs.
- Does the AD7294BSUZ have internal and external temperature sensing capabilities?
Yes, it has both internal and external temperature sensing capabilities.
- What is the accuracy of the internal temperature sensor?
The accuracy of the internal temperature sensor is ±2°C (±2.5°C over the full temperature range).
- What communication interface does the AD7294BSUZ use?
The AD7294BSUZ uses a 2-wire fast mode I2C interface.
- What are some of the key applications of the AD7294BSUZ?
Key applications include cellular base stations, RF transmission systems, automotive applications, and industrial controls.
- Does the AD7294BSUZ have programmable alert thresholds and hysteresis?
Yes, it has programmable alert thresholds and hysteresis.
