ST LM2902W User Manual

LM2902W

Low-power quad operational amplifier

Features

■Wide gain bandwidth: 1.3 MHz

■Input common-mode voltage range includes negative rail

■Large voltage gain: 100 dB

■Very low supply current per amplifier: 375 µA

■Low input bias current: 20 nA

■Low input offset current: 2 nA

■ESD internal protection: 800 V

■Wide power supply range

■Single supply: +3 V to +30 V

■Dual supplies: ±1.5 V to ±15 V

Description

This circuit consists of four independent, highgain, internally frequency-compensated operational amplifiers designed especially for automotive and industrial control systems.

The device operates from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.

All the pins are protected against electrostatic discharges up to 800 V.

N

DIP14

(Plastic package)

D

SO-14

(Plastic micropackage)

P

TSSOP14

(Thin shrink small outline package)

Pin connections (top view)

February 2012

Doc ID 9922 Rev 8

1/17

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Absolute maximum ratings and operating conditions	LM2902W

1 Absolute maximum ratings and operating conditions

	Table 1.	Absolute maximum ratings
	Symbol	Parameter	Value	Unit
	VCC	Supply voltage	±16 to 32	V
	Vid	Differential input voltage	+32	V
	Vi	Input voltage	-0.3 to VCC+ + 0.3	V
		Output short-circuit to ground (1)	Infinite
	Iin	Input current (2)	50	mA
	Tstg	Storage temperature range	-65 to +150	°C
		Thermal resistance junction to ambient(3)
	Rthja	SO-14	105	°C/W
		TSSOP14	100
		DIP14	80
		Thermal resistance junction to case(3)
	Rthjc	SO-14	31	°C/W
		TSSOP14	32
		DIP14	33
		HBM: human body model(4)	800	V
	ESD	MM: machine model(5)	100	V
		CDM: charged device model(6)	1500	V

1.Short-circuits from the output to VCC+ can cause excessive heating and potential destruction. The maximum output current is approximately 20 mA, independent of the magnitude of VCC+

2.This input current only exists when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP transistor becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also NPN parasitic action on the IC chip. This

transistor action can cause the output voltages of the op-amps to go to the VCC voltage level (or to ground for a large overdrive) for the time during which an input is driven negative. This is not destructive and normal output is restored for input voltages higher than -0.3 V.

3.Rthja/c are typical values.

4.Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating.

5.Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5Ω). This is done for all couples of connected pin combinations while the other pins are floating.

6.Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly to the ground through only one pin. This is done for all pins.

Table 2.

Operating conditions

Symbol

Parameter

Value

Unit

VCC

Supply voltage

3 to 30

V

Common mode input voltage range

V

- to V

+

- 1.5

Vicm

CC

-

CC

+

V

T

≤ T

≤ T

V

to V

min

amb

CC

CC

- 2

max

Toper

Operating free-air temperature range

-40 to +125

°C

2/17	Doc ID 9922 Rev 8

LM2902W	Circuit schematics

2 Circuit schematics

Figure 1. Schematic diagram (1/4 LM2902)

Doc ID 9922 Rev 8

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Electrical characteristics										LM2902W
3	Electrical characteristics
Table 3. VCC+= 5 V, VCC-= ground, VO= 1.4 V, Tamb= 25° C
	(unless otherwise stated)
Symbol	Parameter				Test conditions		Min.	Typ.	Max.		Unit
			LM2902W					2	7
Vi o	Input offset voltage (1)		LM2902AW						2		mV
			Tmin ≤ Tamb			≤ Tmax LM2902W			9
			Tmin ≤ Tamb			≤ Tmax LM2902AW			4
DVio	Input offset voltage drift							7	30		µV/°C
Iio	Input offset current		Tamb = +25°C					2	30		nA
			Tmin ≤ Tamb ≤ Tmax						40
DIio	Input offset current drift							10	200		pA/°C
Iib	Input bias current(2)		Tamb = +25°C					20	150		nA
			Tmin ≤ Tamb ≤ Tmax						300
			V	+ = +15V, R = 2kΩ,			50	100
				CC		L
			Vo = 1.4V to 11.4V, Tamb = + 25°C
Avd	Large signal voltage gain										V/mV
			VCC+ = +15V, RL = 2kΩ,
			Vo = 1.4V to 11.4V,				25
			Tmin ≤ Tamb ≤ Tmax
SVR	Supply voltage rejection ratio		RS ≤ 10kΩ,			Tamb =+ 25°C	65	110			dB
			RS ≤ 10kΩ, Tmin ≤ Tamb ≤ Tmax				65
			Tamb = +25°C, VCC+ = +5V					0.7	1.2
ICC	Supply current		Tamb = +25°C, VCC+ = +30V					1.5	3		mA
	(all op-amps, no load)		Tmin ≤ Tamb ≤ Tmax, VCC+ = +5V					0.9	1.2
			Tmin ≤ Tamb ≤ Tmax, VCC+ = +30V					1.5	3
CMR	Common-mode rejection ratio		RS ≤ 10kΩ,			Tamb = +25°C	70	80			dB
			RS ≤ 10kΩ, Tmin ≤ Tamb ≤ Tmax				60
Io	Output short-circuit current		Vid = +1V, VCC+ = +15V, Vo = +2V				20	40	70		mA
Isink	Output sink current		Vid = -1V, VCC+ = +15V, Vo = +2V				10	20			mA
			Vid = -1V, VCC+ = +15V, Vo = +0.2V				12	50			µA
			VCC+ = 30V, RL = 2kΩ:
				Tamb	= +25°C		26	27
				Tmin	≤ Tamb ≤ Tmax		26
VOH	High level output voltage		VCC+ = 30V, RL = 10kΩ:								V
				T	= +25°C,		27	28
				amb	≤ Tamb ≤ Tmax
				Tmin			27
			VCC+ = 5V, RL = 2kΩ:
				Tamb = +25°C			3.5
				Tmin ≤ Tamb ≤ Tmax			3

4/17	Doc ID 9922 Rev 8

LM2902W					Electrical characteristics
Table 3. VCC+= 5 V, VCC-= ground, VO= 1.4 V, Tamb= 25° C
	(unless otherwise stated) (continued)
Symbol	Parameter	Test conditions		Min.		Typ.	Max.	Unit
VOL	Low level output voltage	RL = 10kΩ,	Tamb = +25°C			5	20	mV
		RL = 10kΩ,	Tmin ≤ Tamb ≤ Tmax				20
		VCC+ = 15V, Vin = 0.5 to 3V,
SR	Slew rate	RL = 2kΩ, CL = 100pF, unity gain		0.24		0.4		V/µs
		Tmin < Top < Tmax		0.14
GBP	Gain bandwidth product	VCC+ = 30V, Vin = 10mV, RL = 2kΩ,				1.3		MHz
		CL = 100pF
THD	Total harmonic distortion	f = 1kHz, AV = 20dB, RL = 2kΩ,				0.015		%
		Vo = 2Vpp, CL= 100pF, VCC+= 30V
en	Equivalent input noise voltage	f = 1kHz, RS = 100Ω, VCC+ = 30V				40		nV/√Hz
VO1/VO2	Channel separation (3)	1kHz ≤ f ≤ 20kHz				120		dB

1.VO = 1.4 V, RS = 0 Ω, 5 V < VCC+ < 30 V, 0 V < Vic < VCC+ - 1.5 V.

2.The direction of the input current is out of the IC. This current is essentially constant, independent of the state of the output, so there is no change in the load on the input lines.

3.Due to the proximity of external components ensure that stray capacitance does not cause coupling between these external parts. This typically can be detected as this type of capacitance increases at higher frequencies.

Doc ID 9922 Rev 8

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Electrical characteristics	LM2902W
Figure 2. Input bias current vs. Tamb	Figure 3. Input voltage range

					!
	L
				M
Figure 4.	Current limiting	Figure 5.		Supply current

			L

			L L
			L

Figure 6. Gain bandwidth product	Figure 7. Voltage follower pulse response
	(VCC = 15 V)

		L

		4
	VOLTAGE(V)	3		RL	2 kΩ
OUTPUT				VCC = +15V
		2
		1
		0
		3
	(V)	2
INPUT	VOLTAGE	1
		0	10	20	30	40
				TIME (μ s)

6/17	Doc ID 9922 Rev 8