LM4040D20IDBZR

LM4040D20IDBZR is a fixed shunt voltage reference from TI’s LM4040 family. The “D20” denotes a 2.0 V nominal output.
Key points:
- Type: fixed 2.0 V shunt reference (two-terminal style device, used like a zener with regulation).
- Package/grade: SOT-23 (three-lead) RoHS, industrial-temp variant (IDBZR suffix).
- Operating range: biased from a few tens of microamps up to a few milliamps (typical bias around 1 mA for best accuracy).
- Characteristics: low dynamic impedance and good temperature stability for a reference in precision circuits.
- Applications: voltage reference for ADCs/DACs, instrumentation, microcontroller supply references, and any circuit needing a stable 2.0 V reference.
- How to use: connect the anode to ground and the cathode to the supply through a current-setting resistor; the device clamps the load at about 2.0 V.
In short, it’s a compact, industrial-grade 2.0 V shunt reference suitable for precise voltage-reference needs.

Key features of LM4040D20IDBZR (2.0V fixed shunt reference):
- Fixed 2.0 V shunt voltage reference
- Very low dynamic impedance for stable regulation
- Excellent line and load regulation
- Low noise and low temperature drift
- Wide operating current range (micropower to moderate drive; simple resistor bias)
- Simple 3-pin device; no external op-amp needed
- Small package: IDBZR (compact 3-pin package suitable for tight layouts)
- Broad operating supply range and -40°C to 125°C industrial temperature range
- RoHS compliant; suitable for precise references in ADCs, power monitors, and compact regulators
Usage note: requires a bias resistor to set the operating current and a supply voltage above the 2.0 V reference.

- Pin count: 3 pins (SOT-23-3 package).
- Function: Fixed 2.0 V shunt voltage reference (precision reference diode). Pinout (typical): Pin 1 Anode, Pin 2 Cathode, Pin 3 No Connection (NC).

The LM4040D20IDBZR is manufactured by Texas Instruments (TI). TI is an American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits.

LM4040D20IDBZR is a 2.0-V shunt voltage reference. Typical application areas include:
- Precision reference for ADCs/DACs and analog front-ends
- Stable bias/reference for op-amps, comparators, and instrumentation amplifiers
- Battery-powered/portable devices requiring low-power, fixed reference
- Sensor signal conditioning and calibration networks
- Replacement for Zener-based references in regulators and supervisor circuits
Note: used wherever a stable, low-noise voltage reference around 2.0 V is needed.

SOT-23-3 (3-pin) surface-mount package; Pb-free/RoHS compliant (suffix ZR).