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PDF HA17901A Data sheet ( Hoja de datos )
| Número de pieza | HA17901A | |
| Descripción | Quadruple Comparators | |
| Fabricantes | Renesas Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HA17901A (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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HA17901A Series
Quadruple Comparators
REJ03D0806-0100
Rev.1.00
Mar 10, 2006
Description
The HA17901A series products are comparators designed for general purpose, especially for power control systems.
These ICs operate from a single power-supply voltage over a wide range of voltages, and feature a reduced power-
supply current since the supply current is independent of the supply voltage.
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These comparators have the merit which ground is included in the common-mode input voltage range at a single-
voltage power supply operation. These products have a wide range of applications, including limit comparators, simple
A/D converters, pulse/square-wave/time delay generators, wide range VCO circuits, MOS clock timers, multivibrators,
and high-voltage logic gates.
Features
• Wide power-supply voltage range : 2 to 36 V
• Very low supply current
: 0.8 mA Typ.
• Low input bias current
: 25 nA Typ.
• Low input offset current
: 5 nA Typ.
• Low input offset voltage
: 2 mV Typ.
• The common-mode input voltage range includes ground
• Output voltages compatible with CMOS logic systems
Rev.1.00 Mar 10, 2006 page 1 of 15
1 page  
HA17901A Series
Test Circuits
1. Input offset voltage (VIO), input offset current (IIO), and Input bias current (IIB) test circuit
Rf 5k
RS 50
RS 50
VC1
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VIO
=
1
| VO1
+ Rf /
|
RS
SW1
R 20 k
R 20 k
SW2
Rf 5 k
VC2
(mV)
VCC
− RL 51k
VO
+ 470µ−+ V
SW1
On
Off
On
Off
SW2
On
Off
Off
On
Vout
VO1
VO2
VO3
VO4
VC1 =
1
2
VCC
VC2 = 1.4V
IIO =
| VO2 − VO1 |
R(1 + Rf / RS)
(nA)
IIB =
| VO4 − VO3 |
2 ⋅ R(1 + Rf / RS)
(nA)
2. Output saturation voltage (VO sat) output sink current (Iosink), and common-mode input voltage (VCM) test circuit
50
SW1 1
2
VC1 5k
SW2
1
2
50
VC2
VCC
1.6k
−
+
50
4.87k
SW3
Item VC1
VOsat 2V
VC3
Iosink 2V
VCM 2V
VC2 VC3 SW1
0V 1
0V
−1 to
VCC
1.5V
1
2
SW2 SW3
Unit
1 1 at V
VCC = 5V
3 at
VCC = 15V
12
mA
Switched 3
between
1 and 2
V
3. Supply current (ICC) test circuit
1V
A
+
−
VCC
ICC: RL = ∞
Rev.1.00 Mar 10, 2006 page 5 of 15
5 Page 
HA17901A Series
3. Voltage Controlled Oscillator
In the circuit in figure 5, comparator A1 operates as an integrator, A2 operates as a comparator with hysteresis, and
A3 operates as the switch that controls the oscillator frequency. If the output Vout1 is at the low level, the A3 output
will go to the low level and the A1 inverting input will become a lower level than the A1 noninverting input. The
A1 output will integrate this state and its output will increase towards the high level. When the output of the
integrator A1 exceeds the level on the comparator A2 inverting input, A2 inverts to the high level and both the output
Vout1 and the A3 output go to the high level. This causes the integrator to integrate a negative state, resulting in its
output decreasing towards the low level. Then, when the A1 output level becomes lower than the level on the A2
noninverting input, the output Vout1 is once again inverted to the low level. This operation generates a square wave
on Vout1 and a triangular wave on Vout2.
100 k
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Frequency
control
voltage
input
0.1 µ
20 k
50 k
10
20 k
VCC
500 p
− A1
HA17901A
+
VCC
A3 −
VCC
3k
0.01 µ
5.1 k
VCC/2
VCC/2
VCC = 30 V
+250 mV < +VC < +50 V
700 Hz < / < 100 kHz
HA17901A
+
100 k
VCC
+ A2
HA17901A
−
Figure 5 Voltage Controlled Oscillator
VCC
3k
Output 1
Output 2
4. Basic Comparator
The circuit shown in figure 6 is a basic comparator. When the input voltage VIN exceeds the reference voltage VREF,
the output goes to the high level.
VCC
Vin
VREF
+
HA17901A
−
3 kΩ
Figure 6 Basic Comparator
Rev.1.00 Mar 10, 2006 page 11 of 15
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet HA17901A.PDF ] | |
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