STMicroelectronics TS922 Technical data

Rail-to-rail high output current dual operational amplifier

Features

■ Rail-to-rail input and output

■ Low noise: 9nV/√Hz

■ Low distortion

■ High output current: 80mA

(able to drive 32Ω loads)

■ High-speed: 4MHz, 1V/μs

■ Operating from 2.7V to 12V

■ Low input offset voltage: 900μV max (TS922A)

■ ESD internal protection: 2kV

■ Latch-up immunity

■ Macromodel included in this specification

■ Dual version available in flip-chip package

Applications

■ Headphone amplifier

■ Sound cards, multimedia systems

■ Line driver, actuator driver

■ Servo amplifier

■ Mobile phone and portable equipment

■ Instrumentation with low noise as key factor

■ Piezoelectric speaker driver

TS922

J

(Flip-chip)

N

DIP8

(Plastic package)

D

SO-8

(Plastic micropackage)

P

TSSOP8

(Thin shrink small outline package)

Description

The TS922 is a rail-to-rail dual BiCMOS

The device is stable for capacitive loads up to 500pF.

operational amplifier optimiz ed and f u lly sp ecif ied for 3V and 5V operation.

The device’s high output current allows low-load impedances to be driven.

Very low noise, low distortion, low offset and a high output current capability make this device an excellent choice for high quality, low voltage or battery operated audio systems.

November 2007 Rev 7 1/22

www.st.com

22

TS922 Pin diagrams

1 Pin diagrams

Figure 1. Pin connections (top view)

Output 1

Inverting Input 1

Non-inverting Input 1

V

1

2

-

+

3

45

CC

Figure 2. Pinout for flip-chip package (top view)

OUT2 -IN2 +IN2

-

+

VCC+

+

-

+

V

8

CC

Output 2

7

-

+

Inverting Input 2

6

Non-inverting Input 2

GND

+IN1-IN1OUT1

3/22

Absolute maximum ratings and operating conditions TS922

2 Absolute maximum ratings and operating conditions

Table 1. Absolute maximum ratings (AMR)

Symbol Parameter Value Unit

(3)

(1)

(6)

(2)

(5)

(7)

(4)

14 V ±1 V

VDD-0.3 to VCC+0.3 V

125 120

°C/W 85 90

40 37

°C/W 41

2000

100

1500

(8)

V

CC

V

id

V

in

T

stg

R

thja

R

thjc

T

ESD

Supply voltage Differential input voltage Input voltage Storage temperature -65 to +150 °C

Thermal resistance junction to ambient

SO-8 TSSOP8 DIP8 Flip-chip

Thermal resistance junction to case

SO-8 TSSOP8 DIP8

Maximum junction temperature 150 °C

j

HBM: human body model MM: machine model CDM: charged device model

Output short circuit duration see note Latch-up immunity 200 mA Soldering temperature (10sec), leaded version

Soldering temperature (10sec), unleaded version

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

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

> ±1V, the maximum input current must not exceed ±1mA. In this case (Vid > ±1V), an input series

id

resistor must be added to limit input current.

3. Do not exceed 14V.

4. Short-circuits can cause excessive heating. Destructive dissipation can result from simultaneous shortcircuits on all amplifiers. These values are typical.

5. Human body model: A 100pF 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.

6. Machine model: A 200pF 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.

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.

8. There is no short-circuit protection inside the device: short-circuits from the output to V excessive heating. The maximum output current is approximately 80mA, independent of the magnitude of V

. Destructive dissipation can result from simultaneous short-circuits on all amplifiers.

CC

250 260

can cause

CC

°C

4/22

TS922 Absolute maximum ratings and operating conditions

Table 2. Operating conditions

Symbol Parameter Value Unit

T

V V

Supply voltage 2.7 to 12 V

CC

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

icm

Operating free air temperature range -40 to +125 °C

oper

5/22

Electrical characteristics TS922

3 Electrical characteristics

Table 3. Electrical characteristics measured at VCC = +3V, VDD = 0V, V

T

= 25°C, and RL connected to VCC/2 (unless otherwise specified)

amb

= VCC/2,

icm

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

Input offset voltage

io

DV

V

Input offset voltage drift 2 μV/°C

io

I

Input offset current

io

Input bias current

I

ib

High level output voltage

OH

Low level output voltage

OL

A

Large signal voltage gain

vd

I

Total supply current

CC

GBP Gain bandwidth product R

CMR Common mode rejection ratio

SVR Supply voltage rejection ratio

Output short circuit current 50 80 mA

I

o

TS922 TS922A TS922IJ (flip-chip)

T

min

≤ T

amb

≤ T

max

TS922 TS922A TS922IJ (flip-chip)

= VCC/2

V

out

≤ T

amb

≤ T

out

≤ T

out

≤ T

out

= VCC/2

out

≤ T

max

= 2V

max

= 2V

max

= 2V

max

2.90

2.87

p-p

70

p-p

15

p-p

T

min

= VCC/2

V

out

T

min

= 10kΩ

R

L

T

min

R

= 600Ω

L

T

min

= 32Ω 2.63 V

R

L

R

= 10kΩ

L

T

min

= 600Ω

R

L

T

min

= 32Ω 180 mV

R

L

= 10kΩ, V

R

L

T

min

= 600Ω, V

L

T

min

R

= 32Ω, V

L

No load, V T

min

= 600Ω 4MHz

L

60

≤ T

T

min

V

= 2.7 to 3.3V

CC

T

≤ T

min

amb

≤ T

max

56 60

60

130

15 100

200

35

16

23

80

85

3

0.9

1.5

5

1.8

2.5

30

100

50 50

100 100

3.2

mV

V/mVR

mA

SR Slew rate 0.7 1.3 V/μs

nA

V

dB

6/22

TS922 Electrical characteristics

φm Phase margin at unit gain R

G

Gain margin RL = 600Ω, CL =100pF 12 dB

m

Equivalent input noise voltage f = 1kHz 9

e

n

= 600Ω, CL =100pF 68 Degrees

L

7/22