1、Module description: The LM236-2.5, LM336-2.5, and LM336B-2.5 integrated circuits are precision 2.5-V shunt regulator diodes. These reference circuits operate as low-temperature-coefficient 2.5-V Zener diodes with a 0.2-Ω dynamic impedance. A third terminal provided on the circuit allows the reference voltage and temperature coefficient to be trimmed easily. The series is useful as precision 2.5-V low-voltage references (VZ) for digital voltmeters, power supplies, or operational-amplifier circuitry. The 2.5-V voltage reference makes it convenient to obtain a stable reference from 5-V logic supplies. Devices in this series operate as shunt regulators, and can be used as either positive or negative voltage references. 2、Function Description: Precision 2.5V reference voltage source is used as reference source. 3、Description of each function module:
4、Components and PCB diagram before welding:
5、Physical map after welding:
ID | Value | Qty. | Package | Components | Manufacturer Part |
---|---|---|---|---|---|
1 | LM336BLP-2.5 | 1 | TO-92 | U1 | |
2 | 2.49k | 1 | 3-0603 | R1 | |
3 | 10k | 1 | RW | R2 | |
4 | 1N914 | 2 | DO-35 | D1,D2 | |
5 | SIP2 | 2 | HDR1X2 | P1,P2 | |
6 | 1k | 1 | 3-0603 | R3 | |
7 | LED | 1 | L-0603 | D3 |
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