Datasheet LM334S (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | Constant Current Source and Temperature Sensor |
| 页数 / 页 | 12 / 8 — TYPICAL APPLICATIO S. Higher Output Current. Low Output Impedance … |
| 文件格式/大小 | PDF / 165 Kb |
| 文件语言 | 英语 |
TYPICAL APPLICATIO S. Higher Output Current. Low Output Impedance Thermometer. Low Input Voltage Reference Driver
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LM134 Series
U TYPICAL APPLICATIO S Higher Output Current Low Output Impedance Thermometer Low Input Voltage Reference Driver
V V IN IN VIN ≥ VREF + 200mV R1 R2 R1 15k 300Ω 1.5k 2N2905 C1 R1* 0.1 Q1 2N4250 2N4250 V+ V+ VOUT = VZ + 64mV AT 25°C C1* V V+ + I OUT = 10mV/°K OUT ≤ 3mA V R C1 R Z Z OUT ≤ 2Ω LT1009 – 0.0022 R LM334 R3 RSET LM334 V– LM334 V– 100Ω R2 V– 120Ω R4 –VIN TA05 4.5k TA07 *SELECT R1 AND C1 FOR OPTIMUM STABILITY TA06
Micropower Bias 1.2V Regulator with 1.8V Minimum Input Zener Biasing
VIN ≥ 1.8V VIN 100k VIN 2N4250 C1 V+ LM4250 0.001 R1 VOUT = 1.2V 33k IOUT ≤ 200µA R LM334 1µA 1N457** R V+ V+ R1* SET V– R ≈6k SET 1% V R 68k R OUT LM334 LM134** R2* VZ 680Ω V– V– 1% TA10 TA09 TA08 SELECT RATIO OF R1 TO R2 FOR ZERO TEMPERATURE DRIFT * –VIN LM134 AND DIODE SHOULD BE ISOTHERMAL **
Alternate Trimming Technique Buffer for Photoconductive Cell High Precision Low TC Current Source
+ I V SET ≥ 50µA IN V+ V+ R LM334 R V+ LM334 V– R R SET 1.5V LM334 V– R1 R1* LT1004-1.2 V– 6.8k R2* (1.235V) TA11 TA12 TA13 –VIN – *FOR ±10% ADJUSTMENT, SELECT RSET 1.37V *I 10% HIGH AND MAKE R1 ≈ 3R SET = + 10µA SET R2 ISET TC = 0.016%/°C + 33nA/°C REGULATION ≈ 0.001%/V 8
U TYPICAL APPLICATIO S Higher Output Current Low Output Impedance Thermometer Low Input Voltage Reference Driver
V V IN IN VIN ≥ VREF + 200mV R1 R2 R1 15k 300Ω 1.5k 2N2905 C1 R1* 0.1 Q1 2N4250 2N4250 V+ V+ VOUT = VZ + 64mV AT 25°C C1* V V+ + I OUT = 10mV/°K OUT ≤ 3mA V R C1 R Z Z OUT ≤ 2Ω LT1009 – 0.0022 R LM334 R3 RSET LM334 V– LM334 V– 100Ω R2 V– 120Ω R4 –VIN TA05 4.5k TA07 *SELECT R1 AND C1 FOR OPTIMUM STABILITY TA06
Micropower Bias 1.2V Regulator with 1.8V Minimum Input Zener Biasing
VIN ≥ 1.8V VIN 100k VIN 2N4250 C1 V+ LM4250 0.001 R1 VOUT = 1.2V 33k IOUT ≤ 200µA R LM334 1µA 1N457** R V+ V+ R1* SET V– R ≈6k SET 1% V R 68k R OUT LM334 LM134** R2* VZ 680Ω V– V– 1% TA10 TA09 TA08 SELECT RATIO OF R1 TO R2 FOR ZERO TEMPERATURE DRIFT * –VIN LM134 AND DIODE SHOULD BE ISOTHERMAL **
Alternate Trimming Technique Buffer for Photoconductive Cell High Precision Low TC Current Source
+ I V SET ≥ 50µA IN V+ V+ R LM334 R V+ LM334 V– R R SET 1.5V LM334 V– R1 R1* LT1004-1.2 V– 6.8k R2* (1.235V) TA11 TA12 TA13 –VIN – *FOR ±10% ADJUSTMENT, SELECT RSET 1.37V *I 10% HIGH AND MAKE R1 ≈ 3R SET = + 10µA SET R2 ISET TC = 0.016%/°C + 33nA/°C REGULATION ≈ 0.001%/V 8