Добавил:

Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.

Вуз:

Московский государственный университет приборостроения и информатики

Предмет:

[НЕСОРТИРОВАННОЕ]

Файл:

бакМИТ_КП2015 / Компоненты по вариантам / Операционные_усилители / LT1782IS6.pdf

Скачиваний:

Добавлен:

15.03.2016

Размер:

526.76 Кб

Скачать

☆

<<< < Предыдущая 12 / 42 3 4 > Следующая >>>

LT1782

TYPICAL PERFORMANCE CHARACTERISTICS

SUPPLY CURRENT (µA)

Supply Current vs Supply Voltage

45		TA = 125°C
45
40
40		TA = 25°C
		TA = 25°C
35
		TA = –55°C
		TA = –55°C
30
30
25
25
20
20	4	6	8	10	12	14	16	18
2	4	6	8	10	12	14	16	18

SUPPLY VOLTAGE (V)

1782 G01

	Output Voltage
Minimum Supply Voltage	vs Large Input Voltage

	400							5	VS = 5V, 0V
(µV)									VS = 5V, 0V
(µV)	300
	300
CHANGE	200							4
CHANGE

VOLTAGE	100							3
		TA = 125°C		TA = –55°C			V	3							5V
		TA = 125°C		TA = –55°C			V								5V
	0						(V)
	0						OUT
							OUT	2
OFFSET	–100							2
	–100			TA = 25°C								VIN			+
	–200			TA = 25°C

INPUT								1							–
								1
	–300
	–300
	–400							0
	0	1	2	3	4	5		–10–8 –6 –4 –2		0	2	4	6	8	10 12 14 16 18
		TOTAL SUPPLY VOLTAGE (V)									VIN (V)
						1782 G02									1782 G03

Input Bias Current	Output Saturation Voltage	Output Saturation Voltage
vs Common Mode Voltage	vs Load Current (Output High)	vs Load Current (Output Low)

	6000	VS = 5V, 0V								1	VS = ±2.5V				1
	5000									(V)	VOD = 30mV			(V)
	4000			TA = 125°C							VOD = 30mV
	4000			TA = 125°C
	3000
	2000														0.1
	1000					TA = 25°C						TA = 125°C
										0.1
	40									OUTPUTSATURATIONVOLTAGE	TA = 25°C		TA = –55°C
CURRENTINPUTBIAS(nA)	40													OUTPUTSATURATIONVOLTAGE
	30					TA = –55°C									0.01
	20
	10
	0
	0
	–10	3.8	4	4.2 4.4 4.6 4.8	5	5.2 5.4	15	16	18	0.01	10µ	100µ	1m	10m	0.001
		3.8	4	4.2 4.4 4.6 4.8	5	5.2 5.4	15	16	18	1µ	10µ	100µ	1m	10m
				COMMON MODE VOLTAGE (V)							SOURCING LOAD CURRENT (A)
								1782 G04						1782 G05

VS = ±2.5V
VOD = 30mV
			TA = 125°C
	TA = 25°C		TA = –55°C
	TA = 25°C
1µ	10µ	1µ	1m	10m

SINKING LOAD CURRENT (A)

1782 G06

OUTPUT SATURATION VOLTAGE (mV)

Output Saturation Voltage vs Input Overdrive

100

OUTPUT HIGH

OUTPUT LOW

VS = ±2.5V 1 NO LOAD

0 10 20 30 40 50 60 INPUT OVERDRIVE (mV)

1782 G07

OUTPUT CURRENT (mA)

Output Short-Circuit Current vs Temperature

VS = ±5V

SINKING CURRENT

SOURCING CURRENT

15–50

–25

100

125

TEMPERATURE (°C)

1782 G08

0.1Hz to 10Hz Noise Voltage

VS = ±2.5V

NOISE VOLTAGE (400nV/DIV)

0 1 2 3 4 5 6 7 8 9 10 TIME (sec)

1782 G09

1782fc

LT1782

TYPICAL PERFORMANCE CHARACTERISTICS

INPUT NOISE VOLTAGE DENSITY (nV/√HZ)

Noise Voltage Density vs Frequency

20 1

100

10k

FREQUENCY (Hz)

1782 G10

INPUT NOISE CURRENT DENSITY (pA/√HZ)

Input Noise Current vs Frequency

0.40
0.40					VS = ±2.5V
					VS = ±2.5V
0.35
0.35
0.30
0.30
0.25
0.25
0.20
0.20
0.15
0.15
0.10
0.10
0.05
0.05
0
0	1	10	100	1k		10k

FREQUENCY (Hz)

1782 G11

GAIN (dB)

Gain and Phase Shift vs Frequency

70
70
60
50
		PHASE
		PHASE
40
30
20			GAIN
20
10
0
–10
–20
–30
–30	10k			100k
1k	10k			100k

FREQUENCY (Hz)

			100
VS = ±2.5V			100
			80
			60
			40	PHASE
			20	PHASE
			0	SHIFT
			0
			–20	(DEG)
			–40	(DEG)
			–60
			–80
			–100
			–100
		1M
	1782 G12

GAIN BANDWIDTH (kHz)

Gain Bandwidth Product vs Temperature

230

f = 5kHz

VS = ±2.5V

220

210								(V/µs)
210
190
190								SLEWRATE
200
180


170
170
–50	–25	0	25	50	75	100	125

TEMPERATURE (°C)

1782 G13

Slew Rate vs Temperature

0.11

VS = ±2.5V

0.10

RISING

0.09

0.08

FALLING

0.07

0.06

0.05

0.04 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

1782 G14

	Gain Bandwidth Product and
	Phase Margin vs Supply Voltage
										60	PHASE
											PHASE
(kHz)PRODUCT				PHASE MARGIN						55	(DEG)MARGIN
(kHz)PRODUCT											(DEG)MARGIN

	240									50
	220
BAINDWIDTH	200			GAIN BANDWIDTH PRODUCT
BAINDWIDTH

	180	AV = –1
GAIN	160 0	RF = RG = 10k			8	10	12	14	16	18
GAIN	160 0	2	4	6	8	10	12	14	16	18
		f = 5kHz
			TOTAL SUPPLY VOLTAGE (V)
									1782 G15

GAIN BANDWIDTH PRODUCT (kHz)

Gain Bandwidth Product and
Phase Margin vs Load Resistance	PSRR vs Frequency	CMRR vs Frequency

		70		90	VS = ±2.5V			110
				80	VS = ±2.5V
		60		80				100
	PHASE MARGIN	60						100
	PHASE MARGIN	(DEG)MARGINPHASE	REJECTIONRATIO(dB)	70			REJECTIONRATIO(dB)	70
	f = 5kHz	(DEG)MARGINPHASE	REJECTIONRATIO(dB)	70			REJECTIONRATIO(dB)	70
		50		60				90
	VS = ±2.5V			50				80
250	AV = –1			50		POSITIVE SUPPLY		80
	RF = RG = 10k			40
200			SUPPLYPOWER	30			MODECOMMON	60
				30
	GAIN BANDWIDTH PRODUCT			20

150
								50

				10
100				10	NEGATIVE SUPPLY
				0	NEGATIVE SUPPLY			40


50	10k	100k	–10		10k	100k	1M	30
1k	10k	100k		1k	10k	100k	1M
	LOAD RESISTANCE (Ω)				FREQUENCY (Hz)
		1782 G16					1782 G17
		1782 G16

		VS = ±2.5V
1k	10k	100k
	FREQUENCY (Hz)

1782 G18

1782fc

LT1782

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT IMPEDANCE (Ω)

Output Impedance vs Frequency

10k

VS = ±2.5V


1k			AV = 100





100			AV = 10



10


			AV = 1


1






0.1

100 1k 10k 100k 1M FREQUENCY (Hz)

1782 G19

OUTPUT IMPEDANCE (Ω)

Disabled Output Impedance

Settling Time to 0.1%

vs Frequency (Note 8)

vs Output Step

VS = ±2.5V

VPIN5 (SHUTDOWN) = 2.5V

AV = 1

AV = –1

100k

(V)

STEP

10k

VS = ±5V

OUTPUT

–1

–2

AV = 1

AV = –1

–3

100

10k

100k

–4

100

FREQUENCY (Hz)

SETTLING TIME (µs)

1782 G20

1782 G21

OVERSHOOT (%)

		Capacitive Load Handling
		Overshoot vs Capacitive Load
40
40		VS = 5V, 0V
35		VCM = 2.5V
35		VCM = 2.5V
30
30
25
25
20
20
15			AV	= 1
15
10				AV =	5
10
5						AV =	10
5
0
0	10		100			1000		10000
	10		100			1000		10000

CAPACITIVE LOAD (pF)

1782 G22

OUTPUT SWING (VP-P)

Undistorted Output Swing vs Frequency

12
12			DISTORTION		≤	1%
			DISTORTION		≤	1%
10	VS = ±5V			A	V	= 1
10
8
8
6
6
4
	VS = ±1.5V


2
2
0100
0100		1k	10k			100k
		FREQUENCY (Hz)
					1782 G23

THD + NOISE (%)

Total Harmonic Distortion + Noise vs Frequency

VS = 3V, 0V

VOUT = 2VP-P

VCM = 1.2V

0.1

RL = 10k

0.010

AV = –1

RF = RG = 100k

AV = 1

0.001
10	100	1k	10k

FREQUENCY (Hz)

1782 G24

Total Harmonic Distortion + Noise	Total Harmonic Distortion + Noise
vs Load Resistance	vs Output Voltage Amplitude

	10	VS = 3V TOTAL				10		f = 1kHz, RL = 10k
		AV = 1
		VIN = 2VP-P AT 1kHz						AV = 1	AV = –1, RF = RG = 100k
	1					1		AV = 1	AV = –1, RF = RG = 100k
	1					1		VS = ±1.5V	VS = ±1.5V
(%)			VS = ±1.5V		(%)			VCM = 0V	VCM = 0V
NOISE+			VIN = ±1V		NOISE+	0.1
NOISE+	0.1			VS = 3V, 0V	NOISE+
	0.1
THD				VIN = 0.5V TO 2.5V	THD
THD					THD
	0.01		VS = 3V, 0V			0.01		AV = 1	AV = –1, RF = RG = 100k
			VS = 3V, 0V
			VIN = 0.2V TO 2.2V
								VS = 3V. 0V	VS = 3V, 0V
0.001						0.001		VCM = 1.5V	VCM = 1.5V
0.001						0.001	0	1	2	3
	100		1k	10k	100k		0	1	2	3

LOAD RESISTANCE TO GROUND (Ω)	OUTPUT VOLTAGE AMPLITUDE (VP-P)
1782 G25	1782 G26

Open-Loop Gain

(50µV/DIV)

VS = ±5V

CHANGE

RL = 10k

OFFSET VOLTAGE

RL = 50k

RL = 2k

INPUT

–6

–5

–4

–3

–2

–1

OUTPUT VOLTAGE (V)

1782 G27

1782fc

LT1782

TYPICAL PERFORMANCE CHARACTERISTICS

SUPPLY CURRENT (µA)

	Supply Current
	vs Shutdown Voltage								Large-Signal Response		Small-Signal Response
50
50							VS = 5V, 0V

40			TA = 125°C
			TA = 125°C


30				TA = 25°C
				TA = 25°C



20						TA = –55°C
						TA = –55°C


10									VS = ±5V	1782 G29	VS = ±5V	1782 G30




0									AV = 1		AV = 1
									CL = 15pF		CL = 15pF
		0.5	1		1.5		2		CL = 15pF		CL = 15pF
0		0.5	1		1.5		2	2.5

SHUTDOWN PIN VOLTAGE (V)

1782 G28

APPLICATIONS INFORMATION

Supply Voltage

The positive supply pin of the LT1782 should be bypassed with a small capacitor (typically 0.1µF) within an inch of the pin. When driving heavy loads, an additional 4.7µF electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin.

The LT1782 is protected against reverse battery voltages up to 18V. In the event a reverse battery condition occurs, the supply current is typically less than 1nA.

Inputs

The LT1782 has two input stages, NPN and PNP (see the Simplified Schematic), resulting in three distinct operating regions as shown in the Input Bias Current vs Common Mode typical performance curve.

For input voltages about 0.8V or more below V+, the PNP input stage is active and the input bias current is typically –8nA. When the input common mode voltage is within 0.5V of the positive rail, the NPN stage is operating and the input bias current is typically 15nA. Increases in temperature will cause the voltage at which operation switches from the PNP input stage to the NPN input stage to move towards V+. The input offset voltage of the NPN stage is untrimmed and is typically 1.8mV.

A Schottky diode in the collector of the input NPN transistors, along with special geometries for these NPN transistors, allows the LT1782 to operate with either or both of its inputs above V+. At about 0.3V above V+, the NPN input transistor is fully saturated and the input bias current is typically 4µA at room temperature. The input offset voltage is typically 1.8mV when operating above V+. The LT1782 will operate with its inputs 18V above V– regardless of V+.

The inputs are protected against excursions as much as 10V below V– by an internal 6k resistor in series with each input and a diode from the input to the negative supply. The input stage of the LT1782 incorporates phase reversal protection to prevent the output from phase reversing for inputs up to 9V below V–. There are no clamping diodes between the inputs and the maximum differential input voltage is 18V.

Output

The output of the LT1782 can swing to within 60mV of the positive rail with no load and within 3mV of the negative rail with no load. When monitoring voltages within 60mV of the positive rail or within 3mV of the negative rail, gain should be taken to keep the output from clipping. The LT1782 can sink and source over 30mA at ±5V supplies,

1782fc

<<< < Предыдущая 12 / 42 3 4 > Следующая >>>

Соседние файлы в папке Операционные_усилители

#
15.03.2016337.69 Кб70AD822ARM.pdf
#
15.03.2016622.56 Кб70AD8531ART.pdf
#
15.03.2016622.56 Кб70AD8532ARU.pdf
#
15.03.2016311.39 Кб70LT1677IN8.pdf
#
15.03.2016526.76 Кб70LT1782IS6.pdf
#
15.03.2016262.4 Кб70LT1881IS8.pdf
#
15.03.2016298.19 Кб71LT6010IDD.pdf
#
15.03.2016337.23 Кб71LT6013IS8.pdf
#
15.03.2016337.23 Кб70LT6014IDD.pdf
#
15.03.2016247.23 Кб70LTC6084HMS8.pdf