UC1633
UC2633
UC3633
Phase Locked Frequency Controller
FEATURES
∙Precision Phase Locked Frequency Control System
∙Crystal Oscillator
∙Programmable Reference Frequency Dividers
∙Phase Detector with Absolute Frequency Steering
∙Digital Lock Indicator
∙Double Edge Option on the Frequency Feedback Sensing Amplifier
∙Two High Current Op-Amps
∙5V Reference Output
BLOCK DIAGRAM
DESCRIPTION
The UC1633 family of integrated circuits was designed for use in phase locked frequency control loops. While optimized for precision speed control of DC motors, these devices are universal enough for most applications that require phase locked control. A precise reference frequency can be generated using the device’s high frequency oscillator and programmable frequency dividers. The oscillator operates using a broad range of crystals, or, can function as a buffer stage to an external frequency source.
The phase detector on these integrated circuits compares the reference frequency with a frequency/phase feedback signal. In the case of a motor, feedback is obtained at a hall output of other speed detection device. This signal is buffered by a sense ampilfier that squares up the signal as it goes into the digital phase detector. The phase detector responds proportionally to the phase error between the reference and the sense amplifier output. This phase detector includes absolute frequency steering to provide maximum drive signals when any frequency error exists. This feature allows optimum start-up and lock times to be realized.
Two op-amps are included that can be configured to provide necessary loop filtering. The outputs of the op-amps will source or sink in excess of 16mA, so they can provide a low impedence control signal to driving circuits.
Additional features include a double edge option on the sense amplifier that can be used to double the loop reference frequency for increased loop bandwidths. A digital lock signal is provided that indicates when there is zero frequency error, and a 5V reference output allows DC operating levels to be accurately set.
4/97 |
1 |
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (+VIN) . . . . . . . . . . . . . . . . . . . . . . . . +20V Reference Output Current . . . . . . . . . . . . . . . . . . . . . . . . -30mA Op-Amp Output Currents . . . . . . . . . . . . . . . . . . . . . . . . ±30mA Op-Amp Input Voltages . . . . . . . . . . . . . . . . . . . . . -.3V to +20V Phase Detector Output Current . . . . . . . . . . . . . . . . . . . ±10mA Lock Indicator Output Current . . . . . . . . . . . . . . . . . . . . +15mA Lock Indicator Output Voltage . . . . . . . . . . . . . . . . . . . . . . +20V Divide Select Input Voltages . . . . . . . . . . . . . . . . . -.3V to +10V Double Edge Disable Input Voltage . . . . . . . . . . . . -.3V to +10V Oscillator Input Voltage . . . . . . . . . . . . . . . . . . . . . . -.3V to +5V Sense Amplifier Input Voltage . . . . . . . . . . . . . . . . .3V to +20V Power Dissipation at TA = 25°C (Note 2 . . . . . . . . . . . 1000mW Power dissipation at TC = 25°C (Note 2) . . . . . . . . . . . 2000mW Operating Junction Temperature . . . . . . . . . . . -55°C to +150°C Storage Temperature . . . . . . . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C
DIL-16 (TOP VIEW)
J or N Package
UC1633
UC2633
UC3633
Note1: Voltages are referenced to ground, (Pin 16). Currents are positive into, negative out of, the specified terminals.
Note 2: Consult Packaging Section of Databook for thermal limitations and considerations of package.
CONNECTION DIAGRAMS
PLCC-20 (TOP VIEW) |
PACKAGE PIN FUNCTION |
|
Q Package |
FUNCTION |
PIN |
|
N/C |
1 |
|
Div 4/5 Input |
2 |
|
Div 2/4/8 Input |
3 |
|
Lock Indicator Output |
4 |
|
Phase Detector Output |
5 |
|
N/C |
6 |
|
Dbl Edge Disable Input |
7 |
|
Sense Amp Input |
8 |
|
5V Ref Output |
9 |
|
Loop Amp Inv Input |
10 |
|
N/C |
11 |
|
Loop Amp Output |
12 |
|
Aux Amp Non-Inv Input |
13 |
|
Aux Amp Inv Input |
14 |
|
Aux Amp Output |
15 |
|
N/C |
16 |
|
+VIN |
17 |
|
OSC Output |
18 |
|
OSC Input |
19 |
|
Ground |
20 |
ELECTRICAL CHARACTERISTICS: (Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the |
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UC3633, -25°C to +85°C for the UC2633, -55°C to +125°C for the UC1633, +V IN = |
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12V; TA=TJ.) |
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PARAMETER |
|
TEST CONDITIONS |
MIN. |
TYP. |
MAX. |
UNITS |
|
Supply Current |
|
+VIN = 15V |
|
20 |
28 |
|
mA |
Reference |
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Output Voltage (VREF) |
|
|
4.75 |
5.0 |
5.25 |
|
V |
Load Regulation |
|
IOUT = 0V to 7mA |
|
5.0 |
20 |
|
mV |
Line Regulation |
|
+VIN = 8V to 15V |
|
2.0 |
20 |
|
mV |
Short Circuit Current |
|
VOUT = 0V |
12 |
30 |
|
|
mA |
Oscillator |
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DC Voltage Gain |
|
Oscillator Input to Oscillator Output |
12 |
16 |
20 |
|
dB |
Input DC Level (VIB) |
|
Oscillator Input Pin Open, TJ = 25°C |
1.15 |
1.3 |
1.45 |
|
V |
Input Impedance (Note 3) |
|
VIN = VIB ±0.5V, TJ = 25°C |
1.3 |
1.6 |
1.9 |
|
kΩ |
Output DC Level |
|
Oscillator Input Pin Open, TJ = 25°C |
1.2 |
1.4 |
1.6 |
|
V |
Maximum Operating Frequency |
|
|
10 |
|
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|
MHz |
Dividers |
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Maximum Input Frequency |
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Input = 1VPP at Oscillator Input |
10 |
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MHz |
Div. 4/5 Input Current |
|
Input = 5V (Div. by 4) |
|
150 |
500 |
|
μA |
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Input = 0V (Div. by 5) |
-5.0 |
0.0 |
5.0 |
|
μA |
Div. 4/5 Threshold |
|
|
0.5 |
1.6 |
2.2 |
|
V |
Note 3: These impedence levels will vary with TJ at about 1700ppm/°C
2
UC1633
UC2633
UC3633
ELECTRICAL |
(Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the UC3633, |
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CHARACTERISTICS (cont.): -25°C to +85°C for the UC2633, -55°C to +125°C for the UC1633, +V IN = 12V; TA=TJ.) |
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PARAMETER |
|
TEST CONDITIONS |
MIN. |
TYP. |
MAX. |
UNITS |
|
Dividers (cont.) |
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Div. 2/4/8 Input Current |
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Input = 5V (Div. by 8) |
|
150 |
500 |
|
μA |
|
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Input = 0V (Div. by 2) |
-500 |
-150 |
|
|
μA |
Div. 2/4/8 Open Circuit Voltage |
|
Input Current = 0μA (Div. by 4) |
1.5 |
2.5 |
3.5 |
|
V |
Div. by 2 Threshold |
|
|
0.20 |
0.8 |
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V |
Div. by 4 Threshold |
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1.5 |
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3.5 |
|
V |
Div. by 8 Threshold |
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Volts Below VREF |
0.20 |
0.8 |
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V |
Sense Amplifier |
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Threshold Voltage |
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Percent of VREF |
27 |
30 |
33 |
|
% |
Threshold Hysteresis |
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10 |
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mV |
Input Bias Current |
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Input = 1.5V |
-1.0 |
-0.2 |
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μA |
Double Edge Disable Input |
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Input Current |
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Input = 5V (Disabled) |
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150 |
500 |
|
μA |
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Input = 0V (Enabled) |
-5.0 |
0.0 |
5.0 |
|
μA |
Threshold Voltage |
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|
0.5 |
1.6 |
2.2 |
|
v |
Phase Detector |
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High Output Level |
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Positive Phase/Freq. Error, Volts Below VREF |
|
0.2 |
0.5 |
|
V |
Low Output Level |
|
Negative Phase/Freq. Error |
|
0.2 |
0.5 |
|
V |
Mid Output Level |
|
Zero Phase/Freq. Error, Percent of VREF |
47 |
50 |
53 |
|
% |
High Level Maximum Source Current |
VOUT = 4.3V |
2.0 |
8.0 |
|
|
mA |
|
Low Level Maximum Sink Current |
|
VOUT = 0.7V |
2.0 |
5.0 |
|
|
mA |
Mid Level Output Impedance (Note 3) |
IOUT = -200 to +200μA, TJ = 25°C |
4.5 |
6.0 |
7.5 |
|
k Ω |
|
Lock Indicator Output |
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Saturation Voltage |
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Freq. Error, IOUT = 5mA |
|
0.3 |
0.45 |
|
V |
Leakage Current |
|
Zero Freq. Error, VOUT = 15V |
|
0.1 |
1.0 |
|
μA |
Loop Amplifier |
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NON INV. Reference Voltage |
|
Percent of VREF |
47 |
50 |
53 |
|
% |
Input Bias Current |
|
Input = 2.5V |
-0.8 |
-0.2 |
|
|
μA |
AVOL |
|
|
60 |
75 |
|
|
dB |
PSRR |
|
+VIN = 8V to 15V |
70 |
100 |
|
|
dB |
Short Circuit Current |
|
Source, VOUT = 0V |
16 |
35 |
|
|
mA |
|
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Sink, VOUT = 5V |
16 |
30 |
|
|
mA |
Auxiliary Op-Amp |
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Input Offset Voltage |
|
VCM = 2.5V |
|
|
8 |
|
mV |
Input Bias Current |
|
VCM = 2.5V |
-0.8 |
-0.2 |
|
|
μA |
Input Offset Current |
|
VCM = 2.5V |
|
.01 |
0.1 |
|
μA |
AVOL |
|
|
70 |
120 |
|
|
dB |
PSRR |
|
+VIN = 8V to 15V |
70 |
100 |
|
|
dB |
CMRR |
|
VCM = 0V to 10V |
70 |
100 |
|
|
dB |
Short Circuit Current |
|
Source, VOUT = 0V |
16 |
35 |
|
|
mA |
|
|
Sink, VOUT = 5V |
16 |
30 |
|
|
mA |
Note 3: These impedence levels will vary with TJ at about 1700ppm/°C
3
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