NJM2823F [NJRC]
Three Terminal Voltage Reference, 1 Output, 1.136V, Trim/Adjustable, BIPolar, PDSO5, SOT-23, 5PIN;
| 型号： | NJM2823F |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | Three Terminal Voltage Reference, 1 Output, 1.136V, Trim/Adjustable, BIPolar, PDSO5, SOT-23, 5PIN ISM频段 光电二极管 |
| 文件： | 总6页 (文件大小：144K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2823
Precision Micropower Shunt Voltage Reference
■GENERAL DESCRIPTION
■PACKAGE OUTLINE
NJM2823
reference.
Reference voltage form bandgap circuit has guaranteed the high
accuracy of the ±0.4% with trimming. In addition the temperature drift of
15ppm/°C typ. was actualized by the temperature compensating circuit.
of the 60µA for low power technology.
NJM2823F
The Output capacitor is unnecessary by the phase compensating circuit
which is built in. Tolerates capacitive loads, it is easy to use for application.
It is suitable for data converters, instrumentation, and other applications
where precision reference is required.
■FEATURES
■PRODUCT VARIATION
● Precision Reference Voltage
● Low temperature coefficient
● Low Quiescent Current
1136mV 0.4%
15ppm/°C typ.
60µA max.
NJM2824**
Small PKG
● No Output Capacitor Required
● Tolerates Capacitive Loads
● Bipolar Technology
NJM2823
0.4%, IMIN=60µA
● Package Outline
NJM2823F : SOT-23-5 (MTP5)
NJM2820
0.7%, IMIN=500µA
** Planning
■BLOCK DIAGRAM
■PIN CONFIGURATION
CATHODE
NC 1
5 CATHODE
4 FB
ANODE 2
NC 3
VREF
FB
NJM2823F
ANODE
Ver.2009-03-05
- 1 -
NJM2823
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
MAXIMUM RATINGS
UNIT
Cathode Voltage
VKA
14
V
Cathode Current
IK
20
mA
mA
mW
°C
Cathode-Anode Reverse Current
Power Dissipation
-IK
10
PD
TOPR
TSTG
200
Operating Temperature Range
Storage Temperature Range
-40 ∼ +85
-40 ∼ +125
°C
■RECOMMENDED OPERATING CONDITIONS (Ta=25°C)
PARAMETER
Cathode Voltage
Cathode Current
SYMBOL MIN.
TYP.
MAX.
13
12
UNIT
V
mA
VKA
IK
VREF
0.06
–
–
■ELECTRICAL CHARACTERISTICS (IK=100µA,Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Reference Voltage
VREF
VFB=VA
VFB=VA, IMIN≤ IK≤ 1mA
VFB=VA, 1mA≤ IK≤ 12mA
(*1)
(*1)
(*1)
1131.5
1136.0 1140.5
mV
mV
mV
–
–
0.15
1.5
1.1
6
∆VREF
/
Load Regulation
∆IK
Reference Voltage
Change vs. Cathode
Voltage Change
Minimum Operating
Current
∆VREF
/
VREF≤ VKA≤ 13V,
(*2)
–
-0.52
-2.8
mV/V
∆VKA
R1=120kΩ, R2=val (Note 1)
IMIN
IFB
VFB=VA
(*1)
(*2)
(*1)
–
–
–
20
100
0.1
60
200
–
µA
nA
Ω
Feedback Current
R1=∞, R2=120kΩ
VFB=VA, f≤ 120Hz,
Dynamic Impedance
ZKA
IK=1mA, IAC=0.1IK
■TEMPERATURE CHARACTERISTICS (IK=100µA, Ta=-40°C ∼ 85°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
mV
Reference Voltage
Change (Note 2)
Reference Input
Current Change
5.7
15
8.2
50
∆VREF_T VFB=VA
(*1)
(*2)
–
–
ppm/°C
∆IFB_T
200
–
nA
R1=∞, R2=120kΩ
Note 1: VREF···Reference voltage includes error.
Note 2: Reference Voltage Change is defined as
∆VREF_T [mV] = <VREF × 0.4%> < Reference Voltage Change [ppm/°C] > × <-40°C ∼ 25°C> × Ｖ
.
The maximum value of “Reference Voltage Change” is determined based on sampling evaluation fＲroＥmＦ the 5 initial
production lots, and thus not tested in the production test. Therefore, these values are for the reference design
purpose only.
(*1): Test Circuit (Fig.1)
(*2): Test Circuit (Fig.2)
Ver.2009-03-05
- 2 -
NJM2823
■TEST CIRCUIT
Input
VKA
IK
Input
VKA
IK
VREF
FB
CATHODE
VREF
FB
CATHODE
R1
R2
ANODE
IFB
ANODE
Fig.1 VKA=VREF to test circuit
VFB=VA
Fig.2 VKA>VREF to test circuit
R2
R1
REF
V
KA = V
1+
+ IFB × R2
■TYPICAL CHARACTERISTICS
Reference Voltage vs. Temperature
Reference Voltage vs. Cathode Current
(VFB=VA, Ta=25oC)
(IK=100µA, VFB=VA)
1140
6
4
1139
1138
1137
1136
1135
1134
2
0
-2
-4
-6
0.01
0.1
1
10
100
-50 -25
0
25 50 75 100 125
Cathode Current I (mA)
o
K
Ambient Temperature Ta (C)
Reference Voltage vs. Cathode Current
(VFB=VA, Ta=25oC)
Reference Voltage vs. Cathode Voltage
(R1=120kΩ, R2=val, I =100µA, Ta=25oC)
K
1300
1200
1100
1000
900
1150
1145
1140
1135
1130
1125
1120
800
0
20
40
60
80
100
0
2
4
6
8
10 12 14
Cathode Current I (µA)
Cathode Voltage VKA (V)
K
Ver.2009-03-05
- 3 -
NJM2823
■TYPICAL CHARACTERISTICS
Dynamic Impedance
(IK=1mA, V =V , Ta=25oC)
Feedback Current vs. Temperature
(R1=Open, R2=120kΩ, IK=100µA)
FB
A
200
150
100
50
14
12
10
8
6
4
2
0
0
-50 -25
0
25 50 75 100 125
0.01
0.1
1
10
100
o
Cathode Current Frequency f (kHz)
Ambient Temperature Ta (C)
Sefty Operating Boundary Condition
(VFB=VA, Ta=25oC)
1.5
1.25
1
Ceramic Capacitor
Stable Operation Region
0.75
0.5
0.25
0
Note) Oscillation might occur while operating within the range
of safety curve.
Unstable
Operation
Region
So that, it is necessary to make ample margins by
taking considerations of fluctuation of the device.
0.001
0.01
0.1
1
10
Output Capacitance Co (µF)
Power Dissipation vs. Temperature
(MTP5=Itself, Tj=
125oC)
∼
250
200
150
100
50
0
0
25
50
75
100
Ambient Temperature Ta (oC)
Ver.2009-03-05
- 4 -
NJM2823
■Application Information
The NJM2823 creates a highly accurate reference voltage, enabling a low power consumption application circuit to be
configured.
In the basic application (Fig.1) of the shunt regulator, a voltage drop is created by resistor Rs connected between the
input voltage and the NJM2823, and the output voltage (cathode – anode voltage = VKA) is controlled to a constant
value. The voltage drop due to Rs is determined by the total of the output current and the cathode current.
The feedback to the output voltage is controlled by the FB terminal, and the cathode current changes so that the set
voltage is obtained.
VIN
RS
VOUT=VKA
As a result, Rs must conform to the following conditions.
*Minimum cathode current = 60 uA min
Conditions under which the input voltage is a minimum
and the output current is a maximum.
IK
R1
R2
VREF
CO
*Maximum cathode current = 12 mA max
Conditions under which the input voltage is a maximum
and the output current is a minimum.
IFB
The value of resistor Rs is obtained by means of the following formula.
Fig.1 basic application
V
− VOUT
IN
RS
=
[Ω]
IK + IOUT
The output voltage can be set using any desired value between VREF and 13 V.
The output voltage is set according to the ratio between the values of the two external resistors, however an error
occurs depending upon the feedback current. The error can be minimized by combining two external resistors with low
resistance values. The formula for calculating the output voltage setting is shown below.
R2
R1
VOUT
=
+1 × V
+ IFB ×R2
REF
As shown in the “reference voltage versus cathode voltage”
characteristics example, the reference voltage value has
negative characteristics. The reference voltage is corrected by
using ∆VREF/∆VKA stipulated by the electrical characteristics.
VKA (V)
1.20
1.50
1.80
2.50
3.30
5.00
R1 (k
Ω
)
R2 (k
Ω
)
Open
120
120
120
120
120
Short
38.2
69.5
142.8
226.4
404.3
∆VREF
∆VKA
∆VREF
=
× VOUT
Table.1 Examples of output voltage settings at the standard
Table 1 shows an example of combining constants in the case where R1 is assumed to be 120 kΩ.
The error in the output voltage also varies with the accuracy of the resistors. In order to realize a highly accurate
application, the relative accuracy can be improved by either using accurate resistors or combining integrated resistors.
The NJM2823 contains an optimized phase compensation circuit. Consequently, in the basic application a stable
reference voltage is generated without the use of an output capacitor. As is indicated in the “dynamic impedance
versus frequency” characteristics, the impedance increases in proportion to the frequency. If necessary, connect an
output capacitor to reduce the high frequency impedance. You can connect a ceramic capacitor to obtain high stability,
but in this case be sure to use the NJM2823 in the stable operation region while referring to the “stable operation
boundary conditions” characteristics example.
Ver.2009-03-05
- 5 -
NJM2823
MEMO
[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.2009-03-05
- 6 -
相关型号：
©2020 ICPDF网 联系我们和版权申明