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 R

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.

=10 kΩ.

L

TS941ILT

Output

Non-inverting input

1

V

2

DD

3

V

5

CC

Inverting input

4

TS941ID-TS941IDT

N.C.

Inverting Input 1

Non-inverting Input 1

V

1

2

-

+

3

4

DD

8

V

7

6

Output 2

N.C.

5

CC

TS942ID-TS942IDT-TS942IPT

Output 1

Inverting Input 1

Non-inverting Input 1

V

1

-

2

+

3

45

DD

V

8

CC

Output 2

7

-

Inverting Input 2

6

+

Non-inverting Input 2

TS944ID-TS944IDT-TS944IPT

Output 4

Output 1

1

Inverting Input 1

Non-inverting Input 1

Non-inverting Input 2

Inverting Input 2

Table 1. Device summary

V

Output 2

2

-

+

3

4

CC

5

+

-

6

7

Reference Selection on offset voltage

TS94x TS941, TS942, TS944

TS94xA TS941A, TS942A, TS944A

14

13

-

+

12

11

10

+

-

9

8

Inverting Input 4

Non-inverting Input 4

V

DD

Non-inverting Input 3

Inverting Input 3

Output 3

TS94xB TS941B, TS942B, TS944B

October 2009 Doc ID 6972 Rev 6 1/18

www.st.com

18

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

V

CC

V

id

V

in

T

stg

T

R

thja

R

thjc

ESD

Supply voltage

Differential input voltage

Input voltage range

Storage temperature range -65 to +150 °C

Maximum junction temperature 150 °C

j

Thermal resistance junction to ambient

SOT23-5 SO-8 SO-14 TSSOP8 TSSOP14

Thermal resistance junction to case

SOT23-5 SO-8 SO-14 TSSOP8 TSSOP14

HBM: human body model

MM: machine model

CDM: charged device model

TS941 - TS944IDT TS942 - TS944IPT

Latch-up immunity 200 mA

Lead temperature (soldering, 10sec) 250 °C

(1)

(2)

(3)

(5)

(6)

(TS941, TS942)

(7)

(4)

12 V

± V

CC

V

VDD-0.3 to VCC+0.3 V

(4)

250 125 103

°C/W

120 100

81 40 31

°C/W

37 32

2kV

200 V

1.5

kV

1

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

V

T

CC

icm

oper

Supply voltage 2.5 to 10 V

Common mode input voltage range VDD -0.2 to VCC -1.3 V

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, T

(unless otherwise specified)

Symbol Parameter Min. Typ. Max. Unit

Input offset voltage

V

io

ΔV

io

I

io

I

ib

CMR Common mode rejection ratio 60 85 dB

SVR Supply voltage rejection ratio 50 78 dB

TS941/2/4 TS941/2/4A TS941/2/4B

Input offset voltage drift 7 µV/°C

Input offset current

Input bias current

(1)

= 25° C

amb

1 100 pA

1 150 pA

10

5

mV

2

A

Large signal voltage gain

vd

= 2 Vpp, RL = 1 MΩ

V

O

High level output voltage

V

OH

= 100 mV, RL = 1 MΩ

V

ID

RL = 10 kΩ

Low level output voltage

V

OL

= -100 mV, RL = 1 MΩ

V

ID

RL = 10 kΩ

Output source current

VID = 100 mV, VO = V

Output sink current

= -100 mV, VO = V

V

ID

Supply current (per amplifier), A

I

CC

o

GBP Gain bandwidth product, R

SR Slew rate, R

= 1 MΩ, CL = 50 pF 3 4.5 V/ms

L

φm Phase margin, C

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

DD

CC

= 1, no load 1.2 1.8 µA

VCL

= 1 MΩ, CL = 50 pF 10 kHz

L

= 50 pF 65 Degrees

L

2.45

2.3

350

280

100 dB

2.49

2.4

1

mV

1005200

650

µA

500

V

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,T

(unless otherwise specified)

(1)

Symbol Parameter Min. Typ. Max. Unit

Input offset voltage

V

io

TS941/2/4 TS941/2/4A TS941/2/4B

ΔV

I

Input offset voltage drift 7 µV/°C

io

Input offset current

io

Input bias current

ib

(2)

CMR Common mode rejection ratio 60 85 dB

SVR Supply voltage rejection ratio 50 85 dB

A

Large signal voltage gain

vd

= 2 Vpp,RL = 1 MΩ

V

O

High level output voltage

V

OH

= 100 mV, RL = 1 MΩ

V

ID

RL = 10 kΩ

Low level output voltage

V

OL

VID = -100 mV, RL = 1 MΩ

= 10 kΩ

R

L

Output source current

= 100 mV, VO = V

V

ID

Output sink current

= -100 mV, VO = V

V

ID

Supply current (per amplifier), A

I

CC

o

GBP Gain bandwidth product, R

SR Slew rate, R

= 1 MΩ, CL = 50 pF 3 4.5 V/ms

L

φm Phase margin, C

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.

DD

CC

= 1, no load 1.2 1.8 µA

VCL

= 1 MΩ, CL = 50 pF 10 kHz

L

= 50 pF 65 Degrees

L

amb

2.9

2.8

680

650

= 25° C

10

5 2

1 100 pA

1 150 pA

100 dB

2.99

2.85

1

1005200

1500

1300

mV

V

mV

µA

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, T

amb

= 25° C

(unless otherwise specified)

Symbol Parameter Min. Typ. Max. Unit

Input offset voltage

V

io

TS941/2/4 TS941/2/4A TS941/2/4B

ΔV

I

Input offset voltage drift 7 µV/°C

io

Input offset current

io

Input bias current

ib

(1)

CMR Common mode rejection ratio 60 85 dB

SVR Supply voltage rejection ratio 50 85 dB

A

Large signal voltage gain

vd

= 2 Vpp, RL = 1 MΩ

V

O

100 dB

High level output voltage

V

OH

= 100 mV, RL = 1 MΩ

V

ID

RL = 10 kΩ

4.9

4.8

4.99

4.85

Low level output voltage

V

OL

VID = -100 mV, RL = 1 MΩ

= 10 kΩ

R

L

1005150

Output source current

= 100 mV, VO = V

V

ID

Output sink current

= -100 mV, VO = V

V

ID

Supply current (per amplifier), A

I

CC

o

GBP Gain bandwidth product, R

SR Slew rate, R

= 1 MΩ, CL = 50 pF 3 4.5 V/ms

L

φm Phase margin, C

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

DD

CC

= 1, no load 1.2 1.85 µA

VCL

= 1 MΩ, CL = 50 pF 10 kHz

L

= 50 pF 65 Degrees

L

3

3.7

4.5

10

5

mV

2

1 100 pA

1 150 pA

V

1

mV

mA

5

6/18 Doc ID 6972 Rev 6