Details

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BUY LM334Z/NOPB https://www.utsource.net/itm/p/423303.html
LM134/LM234/LM334 3-Terminal Adjustable Current Sources; Package: TO-92; No of Pins: 3; Qty per Container: 1800/Box

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Operating Current	Iadj	20	-	100	μA
Operating Voltage Range	Vadj	1.2	-	40	V
Temperature Coefficient	Tc	-	50	-	ppm/°C
Output Impedance	Zout	-	0.25	-	Ω
Power Dissipation	Pd	-	625	-	mW
Storage Temperature	Tstg	-65	-	150	°C
Junction Temperature	Tj	-65	-	150	°C

Instructions for Using LM334Z/NOPB

1. Circuit Configuration:

   • The LM334Z/NOPB is typically used as a precision current source or sink.
   • Connect the ADJ pin to the positive supply voltage (V+) for a current source configuration.
   • Connect the ADJ pin to the negative supply voltage (V-) for a current sink configuration.

2. Setting the Current:

   • The output current can be set using an external resistor (Rset) connected between the ADJ pin and the output pin.
   • The formula to calculate the output current (Iout) is: [ I_{text} = frac{6.9 text}{R_{text}} ]
   • For example, to set the current to 1 mA, use: [ R_{text} = frac{6.9 text}{1 text} = 6.9 text{ kΩ} ]

3. Power Supply:

   • Ensure the power supply voltage (V+) is within the operating range (1.2 V to 40 V).
   • The power supply should be stable and free from noise to maintain accurate current regulation.

4. Thermal Management:

   • The device can dissipate up to 625 mW of power. Ensure proper heat sinking if operating at high power levels.
   • Keep the junction temperature (Tj) within the specified range (-65°C to 150°C).

5. Storage and Handling:

   • Store the device in a dry, cool environment.
   • Handle with care to avoid damage to the pins and the internal circuitry.

6. Testing and Troubleshooting:

   • Use a multimeter to verify the output current.
   • If the current is not as expected, check the value of Rset and the connections.
   • Ensure the power supply is stable and within the operating range.

7. Applications:

   • Precision current sources for sensors, LEDs, and other loads.
   • Biasing circuits for transistors and op-amps.
   • Reference currents in analog circuits.

By following these instructions, you can effectively use the LM334Z/NOPB in your electronic designs.

(For reference only)