Overview
The LM94022BIMGX, produced by Texas Instruments (formerly National Semiconductor), is an analog output temperature sensor with a selectable negative temperature coefficient (NTC) output. It is designed to operate over a wide temperature range of -50°C to +150°C and is powered by a single supply voltage from 1.5V to 5.5V. This device is manufactured on an automotive-grade flow and is AEC-Q100 Grade 0 qualified, making it suitable for automotive and other demanding applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 1.5 | 5.5 | V | ||
| Supply Current (IS) | TA = TJ = TMIN to TMAX | 5.4 | μA | ||
| Temperature Accuracy | TA = -50°C to 150°C | -2.7 | 2.7 | °C | |
| Output Load Capacitance (CL) | 1100 | pF | |||
| Source Current | Source ≤50 μA, (VDD – VOUT) ≥200 mV | -0.22 | 0.26 | mV | |
| Sink Current | Sink ≤50 μA, VOUT ≥200 mV | -0.22 | 0.26 | mV | |
| Line Regulation | 200 | μV/V | |||
| Power-ON Time | CL= 0 pF to 1100 pF | 0.7 | ms | ||
| GS1 and GS0 Input Logic Threshold Voltage | VIH | VDD - 0.5 | V | ||
| GS1 and GS0 Input Logic Threshold Voltage | VIL | 0.5 | V |
Key Features
- Selectable Gain: The LM94022BIMGX has four selectable gains controlled by the GS1 and GS0 input pins, allowing for optimization and in-situ testing.
- Low Power Operation: Operates with a low supply current of 5.4 μA.
- High Accuracy: Offers ±2.7°C temperature accuracy over the full -50°C to 150°C range.
- Class-AB Output: Provides strong output source and sink current capability, suitable for driving heavy transient loads.
- Small Package: Available in an extremely small SC70 package.
- Short-Circuit Protection: The output is short-circuit protected.
- Automotive Grade: AEC-Q100 Grade 0 qualified, making it suitable for automotive applications.
Applications
- Automotive: Ideal for temperature sensing in automotive systems.
- Cell Phones: Used in mobile devices for temperature monitoring.
- Wireless Transceivers: Suitable for temperature sensing in wireless communication devices.
- Battery Management: Used in battery management systems to monitor temperature.
- Disk Drives: Applied in disk drive systems for temperature monitoring.
- Games and Appliances: Used in various consumer electronics and appliances.
Q & A
- Q1: What is the operating temperature range of the LM94022BIMGX?
The LM94022BIMGX operates over a temperature range of -50°C to +150°C. - Q2: What is the supply voltage range for the LM94022BIMGX?
The supply voltage range is from 1.5V to 5.5V. - Q3: How many gain settings are available on the LM94022BIMGX?
There are four selectable gain settings controlled by the GS1 and GS0 input pins. - Q4: What is the typical supply current of the LM94022BIMGX?
The typical supply current is 5.4 μA. - Q5: Is the LM94022BIMGX suitable for automotive applications?
Yes, it is AEC-Q100 Grade 0 qualified, making it suitable for automotive applications. - Q6: What is the maximum output load capacitance for the LM94022BIMGX?
The maximum output load capacitance is 1100 pF. - Q7: Does the LM94022BIMGX have short-circuit protection?
Yes, the output is short-circuit protected. - Q8: How does the gain select feature work on the LM94022BIMGX?
The gain select feature is controlled by the GS1 and GS0 input pins, which can be tied to VDD or Ground, or driven by logic signals from a microcontroller. - Q9: What is the power-on time for the LM94022BIMGX?
The power-on time is approximately 0.7 ms. - Q10: Is the LM94022BIMGX available in different packages?
Yes, it is available in a 5-pin SC70 package.
