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PDF RC4153 Data sheet ( Hoja de datos )
| Número de pieza | RC4153 | |
| Descripción | Voltage to Frequency Converter | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RC4153 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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RC4153
Voltage-to-Frequency Converter
www.fairchildsemi.com
Features
• 0.1 Hz to 250 kHz dynamic range
• 0.01% F.S. maximum nonlinearity error—
0.1Hz to 10 kHz
• 50 ppm/°C maximum gain temperature coefficient
(external reference)
• Few external components required
Applications
• Precision voltage-to-frequency converters
• Serial transmission of analog information
• Pulse width modulators
• Frequency-to-voltage converters
• A/D converters and long term integrators
• Signal isolation
• FSK modulation/demodulation
• Frequency scaling
• Motor speed controls
• Phase lock loop stabilization
Description
The 4153 sets a new standard for ease of application and
high frequency performance in monolithic voltage-to-
frequency converters. This voltage-to-frequency converter
requires only four passive external components for precision
operation, making it ideal for many low cost applications
such as A/D conversion, frequency-to-voltage conversion,
and serial data transmission. The improved linearity at high
frequency makes it comparable to many dual slop A/D con-
verters both in conversion time and accuracy, while retaining
the benefits of voltage-to-frequency conversion, i.e., serial
output, cost and size. The speed accuracy and temperature
performance of the 4153 is achieved by incorporating high
speed ECL logic, a high gain, wide bandwidth op amp, and a
buried Zener reference on a single monolithic chip.
www.DataSheet4U.net
1 page  
RC4153
Typical Performance Characteristics
10.06
10.03
10 kHz Full Scale Drift
Output Frequency vs. Temperature
10
9.97
9.94
9.91
-60 -40 -20 0 +20 +40 +60 +80 +100 +120
TA (¡C)
PRODUCT SPECIFICATION
250.8
250.4
250 kHz Full Scale Drift
Output Frequency vs. Temperature
250.0
249.6
249.2
248.8
-60 -40 -20 0 +20 +40 +60 +80 +100 +120
TA (¡C)
250 kHz Frequency-to-Voltage
Nonlinearity vs. Input Voltage
0.08
0.04
0
-0.04
-0.08
-0.12
0 1 2 3 4 5 6 7 8 9 10
VIN (V)
250 kHz Voltage-to-Frequency
Nonlinearity vs. Input Voltage
0.09
0.06
0.03
0
-0.03
-0.06
0 25 50 75 100 125 150 175 200 225 250
FIN (kHz)
0.10
0.08
0.06
250 kHz Full Scale Peak
Nonlinearity vs. Scale Factor
F-to-V
0.04 V-to-F
0.02
0
0 30 60 0 120 150 180 210 240 270
K (kHz)
5
5 Page 
RC4153
Proper
Operation
PRODUCT SPECIFICATION
Timing
Waveform
on CO
Input
Frequency
Input
Frequency
Improper
Operation
Timing
Waveform
On CO
Gitch
4153-10
Figure 7. Frequency-to-Voltage Timing Waveforms
Detailed Circuit Operation
The circuit consists of a buried zener reference (breakdown
occurs below the surface of the die, reducing noise and
contamination), a high speed one-shot, a high speed
switched precision voltage-to-current converter and an
open-collector output transistor.
Figure 8 shows a block diagram of the high speed one-shot
and Figure 9 shows the monolithic implementation. A trigger
pulse sets the R-S latch, which lets CO charge from IT. When
the voltage on CO exceeds VTH. the comparator resets the
latch and discharges CO. Looking at the detailed schematic,
a positive trigger voltage turns on Q5, turns off Q4, and turns
on Q3. Q3 provides more drive to Q5 keeping it on and
latching the base of Q11 low. This turns on the switched
current source and turns off Q1, allowing CO to charge in a
negative direction. When the voltage on CO exceeds VTH,
Q13’s collector pulls Q3’s base down, resetting the latch,
turning off the switched current source and discharging CO
through Q1. Note that all of the transistors in the signal path
are NPNs, and that the voltage swings are minimized ECL
fashion to reduce delays. Minimum delay means minimum
drift of the resultant VFC scale factor at high frequency.
To Switched B
Current Source
C Trig Q
IT
Reset
D
CO
V TH
R-S Latch
Ramp
Gen
Comparator
Figure 8. One-Shot Block Diagram
4153-11
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RC4153.PDF ] | |
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