3
UC1825
UC2825
UC3825
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, these specifications apply for , RT = 3.65k, CT = 1nF, VCC
= 15V, -55°C<TA<125°C for the UC1825, –40°C<TA<85°C for the UC2825, and 0°C<TA<70°C for the UC3825, TA=TO.
UC1825
UC3825
PARAMETERS TEST CONDITIONS UC2825
MIN TOP MAX MIN TOP MAX UNITS
Reference Section
Output Voltage T
O = 25°C, IO = 1mA 5.05 5.10 5.15 5.00 5.10 5.20 V
Line Regulation 10V < V
CC < 30V 2 20 2 20 mV
Load Regulation 1mA < I
O < 10mA 5 20 5 20 mV
Temperature Stability* T
MIN < TA <TMAX 0.2 0.4 0.2 0.4 mV/°C
Total Output Variation* Line, Load, Temperature 5.00 5.20 4.95 5.25 V
Output Noise Voltage* 10Hz < f < 10kHz 50 50 µV
Long Term Stability* T
J = 125°C, 1000hrs. 5 25 5 25 mV
Short Circuit Current V
REF = 0V -15 -50 -100 -15 -50 -100 mA
Oscillator Section
Initial Accuracy* T
J = 2°C 360 400 440 360 400 440 kHz
Voltage Stability* 10V < V
CC < 30V 0.2 2 0.2 2 %
Temperature Stability* T
MIN < TA <TMAX 55%
Total Variation* Line, Temperature 340 460 340 460 kHz
Oscillator Section (cont.)
Clock Out High 3.9 4.5 3.9 4.5 V
Clock Out Low 2.3 2.9 2.3 2.9 V
Ramp Peak* 2.6 2.8 3.0 2.6 2.8 3.0 V
Ramp Valley* 0.7 1.0 1.25 0.7 1.0 1.25 V
Ramp Valley to Peak* 1.6 1.8 2.0 1.6 1.8 2.0 V
Error Amplifier Section
Input Offset Voltage 10 15 mV
Input Bias Current 0.6 3 0.6 3 µA
Input Offset Current 0.1 1 0.1 1 µA
Open Loop Gain 1V < V
O < 4V 60 95 60 95 dB
CMRR 1.5V < V
CM < 5.5V 75 95 75 95 dB
PSRR 10V < V
CC < 30V 85 110 85 110 dB
Output Sink Current V
PIN 3 = 1V 1 2.5 1 2.5 mA
Output Source Current V
PIN 3 = 4V -0.5 -1.3 -0.5 -1.3 mA
Output High Voltage I
PIN 3 = -0.5mA 4.0 4.7 5.0 4.0 4.7 5.0 V
Output Low Voltage I
PIN 3 = 1mA 0 0 .5 1.0 0 0.5 1.0 V
Unity Gain Bandwidth* 3 5.5 3 5.5 MHz
Slew Rate* 6 12 6 12 V/µs
