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參數(shù)資料
| 型號(hào)： | REF1112AIDBZT |
| 英文描述： | 10ppm/C, 1UA, 1.25V Shunt Voltage Reference |
| 中文描述： | 10ppm / ?，停機(jī)時(shí)，1.25V的并聯(lián)電壓參考 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 186K |
| 代理商： | REF1112AIDBZT |
5
REF1112
SBOS283
www.ti.com
0.1
μ
F
3V
R
LOAD
V
OUT
= 2.5V
0.1
μ
F
R
SET
I
BIAS
= I
REF
+ I
LOAD
V
S
V
REF
R
BIAS
I
LOAD
I
BIAS
= V
S
- V
REF
R
BIAS
0.1
μ
F
I
REF
1
μ
F
APPLICATIONS INFORMATION
The REF1112 is a two-terminal bandgap reference diode
designed for high accuracy with outstanding temperature
characteristics at low operating currents. Precision thin-film
resistors result in 0.2% initial voltage accuracy and 50ppm/°C
maximum temperature drift. The REF1112 is specified from
–40°C to +85°C, with operation from –40°C to +125°C, and is
offered in a SOT23-3 package.
Typical connections for the REF1112 are shown in Figure 1.
A minimum 1
μ
A bias current is required to maintain a stable
output voltage and can be provided with a resistor con-
nected to the supply voltage. I
BIAS
depends on the values
selected for R
BIAS
and V
S
, and will vary as a sum of the
minimum operating current and the load current. To main-
tain stable operation, the value of R
BIAS
must be low
enough to maintain the minimum operating current at the
minimum and maximum load and supply voltage levels.
.
FIGURE 3. MicroPOWER 3
μ
A 1V Voltage Reference.
FIGURE 4. 2.5V Reference on 1
μ
A.
V
S
I
SET
0.1
μ
F
R
SET
10k
I
SET
=
V
REF
R
SET
FIGURE 2. REF1112 Provides a Stable Current Source.
FIGURE 1. Typical Connections.
A 0.1
μ
F load capacitor is recommended to maintain stabil-
ity under varying load conditions. A minimum 0.01
μ
F load
capacitor is required for stable operation. Start-up time for
the REF1112 will be affected, depending on the value of
load capacitance and the bias currents being used. A 1
μ
F
power supply bypass capacitor is recommended to mini-
mize supply noise within the circuit.
The REF1112 shunt voltage reference provides a versatile
function for low power and space-conservative applications.
The REF1112 can be configured with an additional diode
and NPN transistor to provide a temperature compensated
current reference as shown in Figure 2. The REF112 can be
scaled to provide extremely low power reference voltages.
Figure 3 shows the REF1112 used as a 1V out, 3
μ
A voltage
reference, and in Figure 4 a 2.5V reference on 1
μ
A.
0.1
μ
F
3V
3V
V
REF
V
OUT
= 1V
795k
250k
1M
REF1112
TLV2401
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REF1112AIDBZTG4 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 1uA SOT23-3 10ppm/C Shunt RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類(lèi)型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| REF1117-2.85 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REF12 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog IC |
| REF12D | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Voltage Reference |
| REF12Z | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Voltage Reference |
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