ST TS941, TS942, TS944, TS941A, TS942A User Manual

TS94x, TS94xA, TS94xB

Output rail-to-rail micropower operational amplifiers

Features

■Rail-to-rail output voltage swing

■Micropower consumption (1.2 µA)

■Single supply operation (2.5 V to 10 V)

■CMOS inputs

■Ultra low input bias current (1 pA)

■ESD protection (2 kV)

■Latch-up immunity (class A)

■Available in SOT23-5 micropackage

Applications

■Battery-powered systems (alarm)

■Portable communication systems (pagers)

■Smoke/gas/fire detectors

■Instrumentation and sensoring

■PH meter

Description

The TS94x (single, dual and quad) series are operational amplifiers characterized for 2.5 V to 10 V operation over a -40° C to +85° C temperature range.

They exhibit excellent consumption -1.2 µA, while featuring 10 kHz gain bandwidth product, 1.5 mA output capability and output rail-to-rail operation - 2.85 V typical at 3 V with RL=10 kΩ.

The TS94x op-amps are ideal for battery-powered systems, where very low supply current and output rail-to-rail are required. Their very low

- 1 pA typical input bias current and constant supply current over supply voltage enhance the devices’ performance near the end of the battery charge or battery life.

				TS941ILT
TS941ID-TS941IDT
TS942ID-TS942IDT-TS942IPT

TS944ID-TS944IDT-TS944IPT

Table 1.	Device summary
Reference		Selection on offset voltage
TS94x		TS941, TS942, TS944
TS94xA		TS941A, TS942A, TS944A
TS94xB		TS941B, TS942B, TS944B

October 2009

Doc ID 6972 Rev 6

1/18

www.st.com

Absolute maximum ratings and operating conditions	TS94x, TS94xA, TS94xB

1 Absolute maximum ratings and operating conditions

Table 2.		Absolute maximum ratings
Symbol		Parameter		Value	Unit
VCC		Supply voltage (1)		12	V
Vid		Differential input voltage (2)		± VCC	V
V	in	Input voltage range (3)	V	-0.3 to V +0.3	V
			DD	CC
Tstg		Storage temperature range		-65 to +150	°C
Tj		Maximum junction temperature		150	°C
		Thermal resistance junction to ambient (4)
		SOT23-5		250
Rthja		SO-8		125	°C/W
		SO-14		103
		TSSOP8		120
		TSSOP14		100
		Thermal resistance junction to case (4)
		SOT23-5		81
Rthjc		SO-8		40	°C/W
		SO-14		31
		TSSOP8		37
		TSSOP14		32
		HBM: human body model (5)		2	kV
		MM: machine model (6) (TS941, TS942)		200	V
ESD
		CDM: charged device model (7)
		TS941 - TS944IDT		1.5	kV
		TS942 - TS944IPT		1
		Latch-up immunity		200	mA
		Lead temperature (soldering, 10sec)		250	°C

1.All voltage values, except differential voltage are with respect to network terminal.

2.Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.

3.The magnitude of input and output voltages must never exceed VCC +0.3 V.

4.Short-circuits can cause excessive heating and destructive dissipation. Rth are typical values.

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

6.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 < 5 Ω). This is done for all couples of connected pin combinations while the other pins are floating.

7.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.

2/18	Doc ID 6972 Rev 6

TS94x, TS94xA, TS94xB			Absolute maximum ratings and operating conditions
	Table 3.	Operating conditions
	Symbol		Parameter	Value	Unit
	VCC	Supply voltage		2.5 to 10	V
	Vicm	Common mode input voltage range		VDD -0.2 to VCC -1.3	V
	Toper	Operating free air temperature range		-40 to + 85	°C

Doc ID 6972 Rev 6

3/18

Electrical characteristics	TS94x, TS94xA, TS94xB

2 Electrical characteristics

Table 4.	VCC = +2.5 V, VDD = 0 V, RL connected to VCC/2, Tamb = 25° C
	(unless otherwise specified)
Symbol				Parameter	Min.	Typ.	Max.	Unit
	Input offset voltage
Vio	TS941/2/4						10	mV
	TS941/2/4A						5
	TS941/2/4B						2
Vio	Input offset voltage drift					7		µV/°C
I	Input offset current (1)					1	100	pA
io
I	Input bias current (1)					1	150	pA
ib
CMR	Common mode rejection ratio				60	85		dB
SVR	Supply voltage rejection ratio				50	78		dB
Avd	Large signal voltage gain					100		dB
	VO = 2 Vpp, RL = 1 MΩ
	High level output voltage
VOH	V	ID	= 100 mV, R	= 1 MΩ	2.45	2.49		V
				L
	RL = 10 kΩ				2.3	2.4
	Low level output voltage
VOL	VID = -100 mV, RL = 1 MΩ					1	5	mV
	RL = 10 kΩ					100	200
	Output source current
Io	VID = 100 mV, VO = VDD				350	650		µA
	Output sink current
	VID = -100 mV, VO = VCC				280	500
ICC	Supply current (per amplifier), AVCL = 1, no load					1.2	1.8	µA
GBP	Gain bandwidth product, RL = 1 MΩ, CL = 50 pF					10		kHz
SR	Slew rate, RL = 1 MΩ, CL = 50 pF				3	4.5		V/ms
φm	Phase margin, CL = 50 pF					65		Degrees

1. Maximum values include unavoidable inaccuracies of the industrial tests.

4/18	Doc ID 6972 Rev 6

TS94x, TS94xA, TS94xB			Electrical characteristics
	Table 5.	VCC = +3 V, VDD = 0 V, RL connected to VCC/2,Tamb = 25° C
		(unless otherwise specified) (1)
	Symbol	Parameter	Min.	Typ.		Max.	Unit
		Input offset voltage
	Vio	TS941/2/4				10	mV
		TS941/2/4A				5
		TS941/2/4B				2
	Vio	Input offset voltage drift		7			µV/°C
	I	Input offset current (2)		1		100	pA
	io
	I	Input bias current (2)		1		150	pA
	ib
	CMR	Common mode rejection ratio	60	85			dB
	SVR	Supply voltage rejection ratio	50	85			dB
	Avd	Large signal voltage gain		100			dB
		VO = 2 Vpp,RL = 1 MΩ
		High level output voltage
	VOH	VID = 100 mV, RL = 1 MΩ	2.9	2.99			V
		RL = 10 kΩ	2.8	2.85
		Low level output voltage
	VOL	VID = -100 mV, RL = 1 MΩ		1		5	mV
		RL = 10 kΩ		100		200
		Output source current
	Io	VID = 100 mV, VO = VDD	680	1500			µA
		Output sink current
		VID = -100 mV, VO = VCC	650	1300
	ICC	Supply current (per amplifier), AVCL = 1, no load		1.2		1.8	µA
	GBP	Gain bandwidth product, RL = 1 MΩ, CL = 50 pF		10			kHz
	SR	Slew rate, RL = 1 MΩ, CL = 50 pF	3	4.5			V/ms
	φm	Phase margin, CL = 50 pF		65			Degrees

1.All electrical values are guaranteed with correlation measurements at 2.5 V and 5 V.

2.Maximum values include unavoidable inaccuracies of the industrial tests.

Doc ID 6972 Rev 6

5/18

Electrical characteristics				TS94x, TS94xA, TS94xB
	Table 6.	VCC = +5 V, VDD = 0 V, RL connected to VCC/2, Tamb = 25° C
		(unless otherwise specified)
	Symbol	Parameter	Min.		Typ.		Max.	Unit
		Input offset voltage
	Vio	TS941/2/4					10	mV
		TS941/2/4A					5
		TS941/2/4B					2
	Vio	Input offset voltage drift			7			µV/°C
	I	Input offset current (1)			1		100	pA
	io
	I	Input bias current (1)			1		150	pA
	ib
	CMR	Common mode rejection ratio	60		85			dB
	SVR	Supply voltage rejection ratio	50		85			dB
	Avd	Large signal voltage gain			100			dB
		VO = 2 Vpp, RL = 1 MΩ
		High level output voltage
	VOH	VID = 100 mV, RL = 1 MΩ	4.9		4.99			V
		RL = 10 kΩ	4.8		4.85
		Low level output voltage
	VOL	VID = -100 mV, RL = 1 MΩ			1		5	mV
		RL = 10 kΩ			100		150
		Output source current
	Io	VID = 100 mV, VO = VDD	3		4.5			mA
		Output sink current
		VID = -100 mV, VO = VCC	3.7		5
	ICC	Supply current (per amplifier), AVCL = 1, no load			1.2		1.85	µA
	GBP	Gain bandwidth product, RL = 1 MΩ, CL = 50 pF			10			kHz
	SR	Slew rate, RL = 1 MΩ, CL = 50 pF	3		4.5			V/ms
	φm	Phase margin, CL = 50 pF			65			Degrees

1. Maximum values include unavoidable inaccuracies of the industrial tests.

6/18	Doc ID 6972 Rev 6