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参数资料
| 型号： | EVAL-PRAOPAMP-1RJZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/4页 |
| 文件大小： | 0K |
| 描述： | ADAPTOR BOARD SINGLE AMP SOT23-5 |
| 标准包装： | 1 |
| 每 IC 通道数： | 1 - 单 |
| 放大器类型： | 通用 |
| 板类型： | 裸（未填充） |
| 已供物品： | 板 |
| 已用 IC / 零件： | SOT-23-5 封装 |
AN-735
AT THE POSITIVE INPUT TERMINAL OF THE AMPLIfiER, DENOTED AS
V+ = BL+. THIS CONTINUES UNTIL THE CAPACITOR VOLTAGE
REACHES THE POSITIVE THRESHOLD V TH , AT WHICH POINT
THE BISTABLE MULTIVIBRATOR SWITCHES TO THE OTHER STABLE
STATE IN WHICH V O = L– AND V+ = BL–. THIS IS SHOWN IN
FIGURE 5.
THE CAPACITOR THEN BEGINS TO DISCHARGE, AND ITS VOLTAGE,
V–, DECREASES EXPONENTIALLY TOWARD L–. THIS CONTINUES
UNTIL V– REACHES THE NEGATIVE THRESHOLD V TL , AT WHICH TIME
THE BISTABLE MULTIVIBRATOR SWITCHES TO THE POSITIVE OUTPUT
STATE, AND THE CYCLE REPEATS ITSELF.
IT IS IMPORTANT TO NOTE THAT THE FREQUENCY OF THE SQUARE
WAVE BEING GENERATED, F O , DEPENDS ONLY ON THE EXTERNAL
COMPONENTS BEING USED. ANY VARIATION IN L+ WILL CAUSE
V+ TO VARY IN PROPORTION, ENSURING THE SAME TRANSITION
TIME AND THE SAME OSCILLATION FREQUENCY. THE MAXIMUM
OPERATING FREQUENCY IS DETERMINED BY THE AMPLIFIER
SPEED, WHICH CAN BE INCREASED SIGNIfiCANTLY BY USING
FASTER DEVICES.
THE LOWEST OPERATING FREQUENCY DEPENDS ON THE PRACTICAL
UPPER LIMITS SET BY R7 AND C9.
USING THE NAME CONVENTION OUTLINED ON THE PRA OPAMP
EVALUATION BOARD, THE FOLLOWING CIRCUIT SHOULD BE CON-
NECTED AS FOLLOWS:
B = R4/(R4 + R9); FEEDBACK FACTOR (NONINVERTING INPUT)
T = 2R7 C9 LN((1 + B)/(1 – B)); PERIOD OF OSCILLATION
F O = 1/T; OSCILLATION FREQUENCY
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FIGURE 8. CAPACITIVE LOAD DRIVE WITH RESISTOR
EXTERNAL COMPENSATION TECHNIQUES
SERIES RESISTOR COMPENSATION
THE USE OF EXTERNAL COMPENSATION NETWORKS MAY BE
REQUIRED TO OPTIMIZE CERTAIN APPLICATIONS. FIGURE 6 IS A
TYPICAL REPRESENTATION OF A SERIES RESISTOR COMPENSA-
TION FOR STABILIZING AN OP AMP DRIVING CAPACITIVE LOAD. THE
STABILIZING EFFECT OF THE SERIES RESISTOR ISOLATES THE OP AMP
OUTPUT AND THE FEEDBACK NETWORK FROM THE CAPACITIVE
LOAD. THE REQUIRED AMOUNT OF SERIES RESISTANCE DEPENDS
ON THE PART USED, BUT VALUES OF 5 TO 50 ARE USUALLY
SUFfiCIENT TO PREVENT LOCAL RESONANCE. THE DISADVANTAGES
OF THIS TECHNIQUE ARE A REDUCTION IN GAIN ACCURACY AND
EXTRA DISTORTION WHEN DRIVING NONLINEAR LOADS.
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FIGURE 6. SERIES RESISTOR COMPENSATION
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FIGURE 7. CAPACITIVE LOAD DRIVE WITHOUT RESISTOR
REV. A
–3–
FIGURE 9. SNUBBER NETWORK
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FIGURE 10. CAPACITIVE LOAD DRIVE WITHOUT SNUBBER
相关PDF资料 |
PDF描述 |
|---|---|
| EVAL-PRAOPAMP-1RMZ | ADAPTOR BOARD SINGLE AMP 8MSOP |
| EVAL-PRAOPAMP-1RZ | ADAPTOR BOARD SINGLE AMP 8SOIC |
| EVAL-PRAOPAMP-2RMZ | ADAPTOR BOARD DUAL AMP MSOP |
| EVAL-PRAOPAMP-4RUZ | ADAPTOR BOARD QUAD AMP 14TSSOP |
| EVAL232R | MOD USB RS232 DEV/EVAL FT232RL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-PRAOPAMP-1RMZ | 功能描述:ADAPTOR BOARD SINGLE AMP 8MSOP RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| EVAL-PRAOPAMP-1RZ | 功能描述:ADAPTOR BOARD SINGLE AMP 8SOIC RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| EVAL-PRAOPAMP-2RMZ | 功能描述:ADAPTOR BOARD DUAL AMP MSOP RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| EVAL-PRAOPAMP-2RZ | 功能描述:ADAPTOR BOARD DUAL AMP SOIC RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| EVAL-PRAOPAMP-4RUZ | 功能描述:ADAPTOR BOARD QUAD AMP 14TSSOP RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
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