Document
19-3249; Rev 0; 5/04
MAX6173–MAX6177
High-Precision Voltage References with Temperature Sensor
General Description
Features
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
♦ 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
Typical Operating Circuit
(VOUT + 2V) TO 40V INPUT
*
*OPTIONAL.
IN OUT
MAX6173–MAX6177
TEMP
TRIM
GND
REFERENCE OUTPUT
*
*
A/D Converters
Voltage Regulators
D/A Converters Digital Voltmeters
Threshold Detectors
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
PART
MAX6173AASA MAX6173BASA MAX6174AASA MAX6174BASA MAX6175AASA MAX6175BASA MAX6176AASA MAX6176BASA MAX6177AASA MAX6177BASA
TEMP RANGE
-40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C
PINPACKAGE
8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO
OUTPUT VOLTAGE (V)
2.500 2.500 4.096 4.096 5.000 5.000 10.000 10.000 3.300 3.300
TEMPERATURE COEFFICIENT (ppm/°C) -40°C TO +125°C 3 10 3 10 3 10 3 10 3 10
INITIAL ACCURACY (%)
0.06 0.10 0.06 0.10 0.06 0.10 0.05 0.10 0.06 0.10
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
High-Precision Voltage References with Temperature Sensor
MAX6173–MAX6177
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +42V OUT, TRIM, TEMP to GND...........................-0.3V to (VIN + 0.3V) Output Short Circuit to GND .....................................................5s Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C) ..................471mW
Operating Temperature Range ........................-40°C to +125°C Junction Temperature .....................................................+150°C Storage Temperature Range ............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX6173 (VOUT = 2.5V)
(VIN = +5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER OUTPUT
Output Voltage
Output Adjustment Range
SYMBOL
VOUT ∆VTRIM
CONDITIONS
No load, TA = +25°C RPOT = 10kΩ
MAX6173A (0.06%) MAX6173B (0.1%)
Output-Voltage Temperature Coefficient (Note 2)
TCVOUT
MAX6173AASA TA = -40°C to +125°C
MAX6173BASA
Line Regulation (Note 3) ∆VOUT / ∆VIN 4.5V ≤ VIN ≤ 40V
Load Regulation (Note 3)
Output Short-Circuit Current Temperature Hysteresis (Note 4)
∆VOUT / ∆IOUT
ISC ∆VOUT/ cycle
Sourcing: 0 ≤ IOUT ≤ 10mA
Sinking: -0.6mA ≤ IOUT ≤ 0 OUT shorted to GND OUT shorted to IN
TA = +25°C TA = -40°C to +1.