It delivers a regulated output current set by one external resistor, with a ±6% accuracy over the full operating range. The input voltage spans 1V to 40V, making it suitable for bias supplies, LED drive, sensor excitation, and current-loop references in commercial-temperature (0°C to 70°C) equipment such as bench instruments, office power supplies, and indoor control boards.
LM334MX-NOPB
LM334MX/NOPB Current Source, ±6% Accuracy, 8-SOIC
MPNLM334MX/NOPB
End of Life
Texas Instruments LM334MX/NOPB, Current Source, Adjustable Output, ±6% Accuracy, 1V to 40V Input, 0°C to 70°C, Surface Mount, 8-SOIC Package.
$1.22Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Mounting | Surface Mount |
| Voltage - input | 1V ~ 40V |
| Output current | Adjustable |
| Operating temperature | 0°C ~ 70°C |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Accuracy | ±6% |
| Function | Current Source |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
Product details
Frequently asked questions
What is the current range of the LM334?
The LM334 output is adjustable from microamps up to about 10 mA, set by a single external resistor. The exact range depends on the resistor value and operating temperature.
Can LM334 be used as a constant current source?
Yes. The LM334 is designed as a three-terminal current source. With one external resistor, it delivers a constant current that is proportional to absolute temperature (PTAT), making it suitable for bias, LED drive, and sensor excitation.
What is the difference between LM334MX/NOPB and LM334Z?
The LM334MX/NOPB is the surface-mount 8-SOIC variant, while the LM334Z is the through-hole TO-92 version. Electrical specifications are identical; the choice is dictated by board assembly process and thermal dissipation needs.
How to set current with LM334MX/NOPB?
Connect a resistor (R_SET) between the R and V− pins. The output current I_SET ≈ (67.7 mV × T) / R_SET, where T is in Kelvin. At 25°C, a 1 kΩ resistor sets roughly 227 µA. The ±6% accuracy covers initial tolerance and drift.