High-Precision Voltage References with Temperature Sensor

The MAX6173–MAX6177 are low-noise, high-precision voltage references. The devices feature 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 MAX6173–MAX6177 provide a TEMP output where the output voltage is proportional to the die temperature, making the devices suitable for a wide variety of temperature-sensing applications. The devices also provide a TRIM input, allowing fine trimming of the output voltage with a resistive divider network. Low temperature drift and low noise make the devices ideal for use with high-resolution A/D or D/A converters.

The MAX6173–MAX6177 provide accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages and accept input voltages up to +40V. The devices draw 320µA (typ) of supply current and source 30mA or sink 2mA of load current. The MAX6173–MAX6177 use bandgap technology for low-noise performance and excellent accuracy. The MAX6173–MAX6177 do not require an output bypass capacitor for stability, and are stable with capacitive loads up to 100µF. Eliminating the output bypass capacitor saves valuable board area in space-critical applications.

The MAX6173–MAX6177 are available in an 8-pin SO package and operate over the automotive (-40°C to +125°C) temperature range.

Applications

* ADCs * Automotive * DACs * Digital Voltmeters * Threshold Detectors * Voltage Regulators

* 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)

* 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

* Short-Circuit Protected

* AEC-Q100 Qualified (Refer to Ordering Info Section for /V parts)