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參數(shù)資料
| 型號： | ADR127BUJZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Precision, Micropower LDO Voltage References in TSOT |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.25 V, PDSO6 |
| 封裝： | ROHS COMPLIANT, MO-193AA, TSOT-6 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 484K |
| 代理商： | ADR127BUJZ-REEL7 |
ADR121/ADR125/ADR127
APPLICATIONS
BASIC VOLTAGE REFERENCE CONNECTION
The circuit in Figure 4 illustrates the basic configuration for the
ADR12x family voltage reference.
Rev. 0 | Page 17 of 20
NC
V
OUT
NC
ADR12x
1
2
3
6
5
4
NC
GND
V
IN
0.1μF
0.1μF
OUTPUT
INPUT
+
+
0
Figure 49. Basic Configuration for the ADR12x Family
STACKING REFERENCE ICs FOR ARBITRARY
OUTPUTS
Some applications may require two reference voltage sources
that are a combined sum of the standard outputs. Figure 50
shows how this stacked output reference can be implemented.
NC
V
OUT
NC
ADR12x
1
2
3
6
5
4
NC
GND
V
IN
0.1μF
0.1μF
OUTPUT1
+
+
NC
V
OUT
NC
ADR12x
1
2
3
6
5
4
NC
GND
V
IN
0.1μF
0.1μF
OUTPUT2
INPUT
+
+
0
Figure 50. Stacking References with ADR12x
Two reference ICs are used and fed from an unregulated input,
V
IN
. The outputs of the individual ICs are connected in series,
which provide two output voltages, V
OUT1
and V
OUT2
. V
OUT1
is the
terminal voltage of U1, while V
OUT2
is the sum of this voltage
and the terminal of U2. U1 and U2 are chosen for the two
voltages that supply the required outputs (see Table 6). For
example, if U1 and U2 are ADR127 and V
IN
≥ 3.95 V, V
OUT1
is
1.25 V and V
OUT2
is 2.5 V.
Table 6. Required Outputs
U1/U2
ADR127/ADR121
ADR127/ADR125
ADR121/ADR125
V
OUT2
1.25 V
1.25 V
2.5 V
V
OUT1
3.75 V
6.25 V
7.5 V
NEGATIVE PRECISION REFERENCE WITHOUT
PRECISION RESISTORS
A negative reference is easily generated by adding an op amp,
A1, and is configured as shown in Figure 51. V
OUT1
is at virtual
ground and, therefore, the negative reference can be taken
directly from the output of the op amp. The op amp must be
dual-supply, low offset, and rail-to-rail if the negative supply
voltage is close to the reference output.
NC
V
OUT
NC
ADR127
AD8603
V–
1
2
3
6
5
4
NC
GND
–
V+
3
2
+
V
IN
0
0.1μF
+V
DD
–V
REF
1k
–V
DD
Figure 51. Negative Reference
GENERAL-PURPOSE CURRENT SOURCE
In low power applications, the need can arise for a precision
current source that can operate on low supply voltages. The
ADR12x can be configured as a precision current source (see
Figure 52). The circuit configuration shown is a floating current
source with a grounded load. The reference’s output voltage is
bootstrapped across R
SET
, which sets the output current into the
load. With this configuration, circuit precision is maintained for
load currents ranging from the reference’s supply current,
typically 85 μA, to approximately 5 mA.
NC
V
OUT
NC
R1
ADR12x
1
2
3
6
5
4
NC
GND
V
IN
I
SY
+V
DD
RL
P1
I
SET
0
Figure 52. ADR12x Trim Configuration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADR127BUJZ-REEL71 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Micropower LDO Voltage References in TSOT |
| ADR130 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Series Sub-Band Gap Voltage Reference |
| ADR130AUJZ-R2 | 功能描述:IC VREF SERIES PREC 0.5V TSOT-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準(zhǔn) 系列:- 產(chǎn)品培訓(xùn)模塊:Voltage Reference Basics 標(biāo)準(zhǔn)包裝:100 系列:- 基準(zhǔn)類型:旁路，精度 輸出電壓:4.096V 容差:±0.075% 溫度系數(shù):50ppm/°C 輸入電壓:- 通道數(shù):1 電流 - 陰極:1µA 電流 - 靜態(tài):- 電流 - 輸出:10mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:管件 |
| ADR130AUJZ-REEL7 | 功能描述:IC VREF SERIES PREC 0.5V TSOT-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準(zhǔn) 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 基準(zhǔn)類型:旁路，精度 輸出電壓:3V 容差:±0.5% 溫度系數(shù):100ppm/°C 輸入電壓:- 通道數(shù):1 電流 - 陰極:82µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-TSSOP（5 引線），SC-88A，SOT-353 供應(yīng)商設(shè)備封裝:SC-70-5 包裝:帶卷 (TR) 其它名稱:296-20888-2 |
| ADR130BUJZ | 制造商:Analog Devices 功能描述:IC SM VOLT REF 0.5/1V 制造商:Analog Devices 功能描述:IC, SM, VOLT REF, 0.5/1V |
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