Datasheet MAX873, MAX875, MAX876 (Analog Devices) - 10

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References Temp Output
supply can experience step changes, a larger output The MAX873/MAX875/MAX876 provide a temperature capacitor reduces the amount of overshoot (under- output proportional to die temperature. TEMP can be cal- shoot) and improves the circuit’s transient response. culated from the following formula: Place output capacitors as close to the devices as pos- TEMP (V) = T sible for best performance. J (°K) x n where TJ = the die temperature,
Supply Current
n = the temperature multiplier, The MAX873/MAX875/MAX876 consume 320µA (typ) of quiescent supply current. This improved efficiency reduces power dissipation and extends battery life. V a ( t T = T ) n TEMP J = 0 ≅ . 1 mV 9 / K °
Thermal Hysteresis
T 0 Thermal hysteresis is the change in the output voltage TA = the ambient temperature. at TA = +25°C before and after the device is cycled over its entire operating temperature range. Hysteresis Self-heating affects the die temperature and conversely, is caused by differential package stress appearing the TEMP output. The TEMP equation assumes the output across the bandgap core transistors. The typical ther- is not loaded. If device power dissipation is negligible, mal hysteresis value is 120ppm. then TJ ≈ TA.
Turn-On Time Applications Information
The MAX873/MAX875/MAX876 typically turn on and settle
Bypassing/Output Capacitance
to within 0.1% of the preset output voltage in 150µs For the best line-transient performance, decouple the (2.5V output). The turn-on time can increase up to input with a 0.1µF ceramic capacitor as shown in the 150µs with the device operating with a 1µF load. Typical Operating Circuit. Place the capacitor as close
Short-Circuited Outputs MAX873/MAX875/MAX876
to IN as possible. When transient performance is less The MAX873/MAX875/MAX876 feature a short-circuit-pro- important, no capacitor is necessary. tected output. Internal circuitry limits the output current The MAX873/MAX875/MAX876 do not require an output to 60mA when short circuiting the output to ground. capacitor for stability and are stable with capacitive The output current is limited to 3mA when short circuit- loads up to 100µF. In applications where the load or the ing the output to the input. 10,000 1000 100 8-BIT TEMPERATURE 10 COEFFICIENT 10-BIT (ppm/°C) 12-BIT 1 14-BIT 16-BIT 0.1 18-BIT 0.01 20-BIT 1 10 100 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C) Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
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