NJU7664R [NJRC]
VOLTAGE CONVERTER FOR GaAs FET; 电压转换器，用于砷化镓场效应管
| 型号： | NJU7664R |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | VOLTAGE CONVERTER FOR GaAs FET |
| 文件： | 总4页 (文件大小：91K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJU7664
PRELIMINARY
VOLTAGE CONVERTER
FOR GaAs FET
■ GENERALDESCRIPTION
■ PACKAGE OUTLINE
The NJU7664 is a voltage converter for GaAs FET, which
contains CR oscillation circuit and dual operational amplifiers.
The voltage converter is a circuit operated by the charge pumping
system, and it generates the negative voltage from the positive
power supply. Furthermore the charge pumping capacitor is
incorporated.
NJU7664R
Both of two operational amplifiers with the gain resistance which is
set up at -OdB output the negative voltage by the inverted input
voltage.
The NJU7664 realizes to operate the GaAs FET requiring the
negative gate biassing.
■ FEATURES
■ PIN CONFIGURATION
• Voltage Converter Operated With The Charge Pumping System
• Charge Pump Capacitor Incorporated
• CR Oscillation Circuit Incorporated
• Wide Operating Voltage
• Output Voltage
• Low Operating Current
• Stand-by Function
• C-MOS Technology
• Package Outline
V
DD = 2.7V to 5.2V
0 to -4.0V (VDD = 5.2V)
1.25mA MAX(VDD = 2.7V)
VSP-8
■ BLOCK DIAGRAM
Ver.2003-07-18
- 1 -
NJU7664
■ TERMINAL DESCRIPTION
No.
1
SYMBOL
FUNCTION
Stand-by input terminal H : oscillating
STB
L : stop oscillating
2
3
4
5
6
7
8
VIN1
NC
Positive voltage input terminal 1
No connection (Electrically open)
Negative voltage output terminal 1
Ground terminal
Negative voltage output terminal 2
Positive voltage input terminal 2
Power supply terminal
VOUT1
GND
VOUT2
VIN2
VDD
■ FUNCTIONAL DESCRIPTION
• Voltage Converter
The voltage converter is a circuit designed for generating the negative voltage (-VDD) from the positive power
supply (VDD).
Because the voltage efficiency is 85% (TYP.), the negative voltage (-VDD x 0.85) is output typically.
This converter uses the charge pumping system which consists of capacitors and switches.
VDD
VDD
GND = 0V
2 x VDD
VOUT = -VDD
• Operational Amplifier
As the input and the feedback resistor of the operational amplifier is incorporated, an uni-multiple inverting
amplifier is constructed.
• Stand-by Function
The NJU7664 turns to the stand-by mode when the STB terminal level is set to "L". During the stand-by mode,
the voltage converter outputs GND voltage and the the operating current is lower as the oscillator stop operating.
Ver.2003-07-18
- 2 -
NJU7664
■ ABSOLUTE MAXIMUM RATINGS
(Ta = 25ºC)
PARAMETER
Supply Voltage
SYMBOL
RATINGS
5.5
GND -0.5 to VDD + 0.5
-5.0
UNIT
VDD
VIN
V
V
V
mW
ºC
ºC
Input Voltage
Output Voltage
Power Dissipation
VOUT
PD
320
-30 to + 85
-40 to +125
Operating Temperature Range
Storage Temperature Range
Topr
Tstg
Note1) Decoupling capacitor should be connected between VDD and GND due to the stabilized operation for the voltage
converter.
■ ELECTRICAL CHARACTERISTICS
·DC CHARACTERISTICS
(VDD = 2.7V, GND = 0V, Ta = 25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Operating Voltage
VDD
IDD1
IDD2
IDD3
2.7
-
-
-
-
5.2
1.25
1.0
V
ISI1 = -100µA, ISI2 = -1µA
No load
-
-
-
mA
mA
µA
Operating Current
1.0
STB = L
High Level Input Voltage
Low Level Input Voltage
VIH
VIL
0.8VDD
GND
VDD
V
V
STB terminal
STB terminal
STB terminal, Vi = VDD or GND
0.2VDD
Input Current 1
Oscillation Frequency
IIN1
fOSC
-
-
0
0
-
4.0
-
1.0
-
2.0
4.0
µA
MHz
V
VDD = 2.7V
Input Voltage
VIN
VIN1, VIN2 Terminals
VDD = 5.2V
VDD = 2.7V
-
V
-
-
-
-
-
10.0
20.0
0
µA
µA
V
VIN = 2.0V
Input Current 2
O
IIN2
VIN1, VIN2 Terminals
VDD = 5.2v
-
VIN = 4.0V
VDD = 2.7V
P
-2.0
-4.0
ISI = -100µA
Output Voltage
VOUT
VOUT1, VOUT2 Terminals
A
VDD = 2.7V
0
V
ISI = -100µA
M
Output Source Current
ISO
ISI
ISITOTAL
VRR1
VRR2
GER
VOUT1, VOUT2 Terminals
VOUT1, VOUT2 Terminals
Total of VOUT1, VOUT2 Term.
ISI = -100µA, CL = 0.1µF
ISI = -5µA, CL = 0.1µF
5.0
-
-
-
-
-
-
-
0.4
0.4
-
-
-100
-105
-
-
10
µA
µA
µA
mV
mV
%
P
Output Sink Current
Output Ripple Current
Gain Error
-10
Ver.2003-07-18
- 3 -
NJU7664
■ APPLICATION CIRCUITS
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
Ver.2003-07-18
- 4 -
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