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General Description

The MAX6143 is a low-noise, high-precision voltage reference. The device features a proprietary temperature coefficient curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low 3ppm/°C temperature coefficient and excellent ±0.06 initial accuracy. The MAX6143 provides a TEMP output where the output voltage is proportional to die tempera ture, making the device suitable for a wide variety of temperature-sensing applications. The device also provides a TRIM input, allowing fine trimming of the output voltage with a resistive-divider network. Low temperature drift and low noise make the MAX6143 ideal for use with high-resolution A/D or D/A converters.

The MAX6143 provides accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages and accepts input voltages up to +40V. The device draws 340μA of supply current and sources 30mA or sinks 2mA of load current. The active-low shutdown feature (SHDN) reduces supply current to 0.01μA. The MAX6143 uses bandgap technology for low-noise performance and excellent accuracy. The MAX6143 does not require an output bypass capacitor for stability, and is stable with capacitive loads up to 100μF. Eliminating the output bypass capacitor saves valuable board area in spacecritical applications.

The MAX6143 is available in an 8-pin SO package and operates over the automotive (-40°C to +125°C) temperature range.

Features

? Wide (VOUT + 2V) to +40V Supply Voltage Range

? Excellent Temperature Stability: 3ppm/°C (max)

? Tight Initial Accuracy: 0.05 (max)

? Low Noise: 3.8μVP-P (typ at 2.5V Output)

? Sources up to 30mA Output Current

? Low Supply Current: 450μA (max at +25°C)

? Low 0.01μA Shutdown Current

? Linear Temperature Transducer Voltage Output

? +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output Voltages

? Wide Operating Temperature Range: -40°C to +125°C

? No External Capacitors Required for Stability

Applications

?? A/D Converters

?? Voltage Regulators

?? D/A Converters

?? Threshold Detectors

?? Digital Voltmeters