Texas Instruments LM4040D20IDCKR precision shunt voltage reference, fixed 2.048 V output, ±1% tolerance, 80 µA cathode current, 15 mA output, SC-70-5 package, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Output type | Fixed |
| Mounting | Surface Mount |
| Reference type | Shunt |
| Voltage - output (Min (Fixed)) | 2.048V |
| Output current | 15 mA |
| Current - cathode | 80 µA |
| Operating temperature | -40°C~85°C(TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Tolerance | ±1% |
| Case | 5-TSSOP, SC-70-5, SOT-353 |
| Noise - 10Hz to 10kHz | 35µVrms |
| Temperature coefficient | 150ppm/°C |
It operates as a two-terminal shunt regulator, requiring only a single external resistor to set the bias current from the supply rail.
Wideband noise is specified at 35 µVrms from 10 Hz to 10 kHz, low enough for 12-bit ADC applications without additional filtering.
Housed in a 5-lead SC-70-5 (SOT-353) package, the LM4040D20IDCKR occupies roughly 2 mm × 2 mm of board area.
Within the LM4040 family, the LM4040A20 offers a tighter ±0.1% initial tolerance but is otherwise pin-compatible and functionally identical in the same SC-70-5 package. The LM4040D20IDCKR is the ±1% grade; the A-grade is the precision tier for applications requiring better than 1% initial accuracy.