TS925
Rail-to-rail high output current quad operational amplifiers
with standby mode and adjustable phantom ground
Features
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Rail-to-rail input and output
Low noise: 9 nV/√
Hz
Low distortion
High output current: 80 mA (able to drive 32
Ω
loads)
High-speed: 4 MHz, 1.3 V/
μ
s
Operating range from 2.7 to 12 V
Low input offset voltage: 900
μV
max.
(TS925A)
Adjustable phantom ground (V
CC
/2)
Standby mode
ESD internal protection: 2 kV
Latch-up immunity
Output 1
Inverting
Input 1
Non-inverting
Input 1
V
CC
+
Non-inverting
Input 2
Inverting
Input 2
Output 2
Phantom ground
1
2
-
3
4
5
6
7
8
-
+
+
-
+
+
-
14
13
12
11
10
9
16
15
D
SO-16
(Plastic micropackage)
P
TSSOP16
(Thin shrink small outline package)
Pin connections (top view)
Applications
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■
Output 4
Inverting
Input 4
Non-inverting
Input 4
V
CC
-
Non-inverting
Input 3
Inverting
Input 3
Output 3
Stdby
Headphone amplifiers
Soundcard amplifiers, piezoelectric speakers
MPEG boards, multimedia systems
Cordless telephones and portable
communication equipment
Line drivers, buffers
Instrumentation with low noise as key factor
Description
The TS925 is a rail-to-rail quad BiCMOS
operational amplifier optimized and fully specified
for 3- and 5-V operation.
High output current allows low load impedances
to be driven. An internal low impedance phantom
ground eliminates the need for an external
reference voltage or biasing arrangement.
The TS925 exhibits very low noise, low distortion
and high output current, making this device an
excellent choice for high-quality, low-voltage or
battery-operated audio/telecom systems.
The device is stable for capacitive loads up to
500 pF. When the STANDBY mode is enabled, the
total consumption drops to 6
μA
(V
CC
= 3 V).
April 2011
Doc ID 4949 Rev 4
1/18
www.st.com
18
Absolute maximum ratings and operating conditions
TS925
1
Absolute maximum ratings and operating conditions
Table 1.
Symbol
VCC
Vid
V
i
T
j
R
thja
R
thjc
Absolute maximum ratings
Parameter
Supply voltage
(1)
Differential input voltage
(2)
Input voltage
Maximum junction temperature
Thermal resistance junction to
ambient
Thermal resistance junction to
case
SO-16
TSSOP16
SO-16
TSSOP16
HBM
Human body model
(3)
Conditions
Value
14
±1
V
DD
-0.3 to V
CC
+0.3
150
95
95
30
25
2
200
1
See note
(5)
200
10 sec,
Pb-free package
260
mA
°C
Unit
V
V
V
°C
°C/W
°C/W
kV
V
kV
ESD
Electrostatic discharge
MM
Machine model
(4)
CDM
Charged device model
Output short circuit duration
Latch-up immunity
Soldering temperature
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
Vid > ±1 V, the maximum input current must not exceed ±1mA. In this case (Vid > ±1V), an input series
resistor must be added to limit input current.
3. Human body model: 100pF discharged through a 1.5 kΩ resistor into pin of device.
4. Machine model ESD: a 200 pF cap is charged to the specified voltage, then discharged directly into the IC
with no external series resistor (internal resistor < 5
Ω),
into pin-to-pin of device.
5. There is no short-circuit protection inside the device: short-circuits from the output to V
cc
can cause
excessive heating. The maximum output current is approximately 80 mA, independent of the magnitude of
V
cc
. Destructive dissipation can result from simultaneous short-circuits on all amplifiers.
Table 2.
Symbol
V
CC
V
icm
T
oper
Operating conditions
Parameter
Supply voltage
Common mode input voltage range
Operating free air temperature range
Value
2.7 to 12
V
DD
-0.2 to V
CC
+0.2
-40 to +125
Unit
V
V
°C
2/18
Doc ID 4949 Rev 4
TS925
Electrical characteristics
2
Electrical characteristics
Table 3.
Electrical characteristics for V
CC
= 3 V with V
DD
= 0 V, V
icm
= V
CC
/2,
R
L
connected to V
CC
/2, T
amb
= 25° C
(unless otherwise specified)
Parameter
Conditions
Min.
Typ.
Max.
Unit
Symbol
DC performance
V
io
Input offset voltage
At T
amb
= +25°C
TS925
TS925A
At T
min.
≤
T
amb
≤
T
max
:
TS925
TS925A
2
V
out
= 1.5V
V
out
= 2.5V
V
icm
from 0 to 3 V
T
min
≤
T
amb
≤
T
max
R
L
= 10kΩ
R
L
= 600Ω
R
L
= 32Ω
R
L
= 10kΩ
R
L
= 600Ω
R
L
= 32Ω
V
out
= 2V
pk-pk
R
L
= 10kΩ
R
L
= 600Ω
R
L
= 32Ω
60
50
No load, V
out
= V
cc/2
Pin 9 connected to V
cc-
at T
amb
= +25°C
at T
min
≤
T
amb
≤
T
max
at T
amb
= +25°C
at T
min
≤
T
amb
≤
T
max
1.1
1
60
2.90
2.87
2.63
1
15
80
mV
3
0.9
5
1.8
μV/°C
30
100
nA
nA
dB
V
DV
io
I
io
I
ib
CMR
Input offset voltage drift
Input offset current
Input bias current
Common mode rejection
ratio
High level output voltage
V
OH
V
OL
Low level output voltage
50
100
180
mV
V/mV
200
35
16
85
80
5
6
0.3
0.4
7
dB
mA
mA
μA
V
V
A
vd
Large signal voltage gain
SVR
I
o
I
CC
I
stby
V
enstby
V
distby
Supply voltage rejection ratio V
cc
= 2.7 to 3.3V
Output short-circuit current
Total supply current
Total supply current in
STANDBY
Pin 9 voltage to enable the
STANDBY mode
(1)
Pin 9 voltage to disable the
STANDBY mode
(1)
AC performance
GBP
SR
Pm
Gain bandwidth product
Slew rate
Phase margin at unit gain
R
L
= 600Ω, C
L
=100pF
R
L
= 600Ω
0.7
4
1.3
68
MHz
V/μs
Degrees
Doc ID 4949 Rev 4
3/18
Electrical characteristics
Table 3.
TS925
Electrical characteristics for V
CC
= 3 V with V
DD
= 0 V, V
icm
= V
CC
/2,
R
L
connected to V
CC
/2, T
amb
= 25° C
(unless otherwise specified) (continued)
Parameter
Gain margin
Equivalent input noise
voltage
Total harmonic distortion
Channel separation
Conditions
R
L
= 600Ω, C
L
=100pF
f = 1kHz
V
out
= 2V
pk-pk
,
f = 1kHz, A
v
= 1,
R
L
= 600Ω
Min.
Typ.
12
9
0.01
Max.
dB
nV
-----------
-
Hz
Symbol
GM
e
n
Unit
%
THD
C
s
120
dB
Phantom ground
V
pg
I
pgsc
Z
pg
Phantom ground output
voltage
Phantom ground output short
circuit current - sourced
Phantom ground impedance
Phantom ground output
voltage noise
Phantom ground output short
circuit current - sinked
DC to 20kHz
f = 1kHz
C
dec
= 100pF
C
dec
= 1nF
C
dec
= 10nF
(2)
12
No output current
V
cc/2
-5%
12
V
cc/2
V
cc/2
+5%
V
mA
Ω
18
3
200
40
17
18
E
npg
nV
-----------
-
Hz
I
pgsk
mA
1. The STANDBY mode is enabled when pin 9 is GROUNDED and disabled when pin 9 is left OPEN.
2. C
dec
is the decoupling capacitor on pin 9.
4/18
Doc ID 4949 Rev 4
TS925
Table 4.
Electrical characteristics
Electrical characteristics for V
CC
= 5 V, V
DD
= 0 V, V
icm
= V
CC
/2,
R
L
connected to V
CC
/2, T
amb
= 25° C
(unless otherwise specified)
Parameter
Conditions
Min.
Typ.
Max.
Unit
Symbol
DC performance
V
io
Input offset voltage
At T
amb
= +25°C:
TS925
TS925A
At T
min.
≤
T
amb
≤
T
max
:
TS925
TS925A
2
V
out
= 2.5V
V
out
= 2.5V
V
icm
from 0 to 5 V
T
min
≤
T
amb
≤
T
max
R
L
= 10kΩ
R
L
= 600Ω
R
L
= 32Ω
R
L
= 10kΩ
R
L
= 600Ω
R
L
= 32Ω
V
out
= 2V
pk-pk
R
L
= 10k
R
L
= 600Ω
R
L
= 32Ω
60
50
No load, V
out
= V
cc/2
Pin 9 connected to V
cc-
at T
amb
= +25°C
at T
min
≤
T
amb
≤
T
max
at T
amb
= +25°C
at T
min
≤
T
amb
≤
T
max
1.1
1
60
4.90
4.85
4.4
1
15
80
3
0.9
5
1.8
mV
DV
io
I
io
I
ib
CMR
Input offset voltage drift
Input offset current
Input bias current
Common mode rejection
ratio
High level output voltage
μV/°C
30
100
nA
nA
dB
V
OH
V
50
120
300
200
40
17
85
80
6
6
0.3
0.4
8
V
OL
Low level output voltage
mV
A
vd
Large signal voltage gain
V/mV
SVR
I
o
I
CC
I
stby
V
enstby
V
distby
Supply voltage rejection ratio V
cc
= 3 to 5V
Output short-circuit current
Total supply current
Total supply current in
STANDBY
Pin 9 Voltage to enable the
STANDBY mode
(1)
Pin 9 voltage to disable the
STANDBY mode
(1)
dB
mA
mA
μA
V
V
AC performance
GBP
SR
Pm
GM
Gain bandwidth product
Slew rate
Phase margin at unit gain
Gain margin
R
L
= 600Ω, C
L
=100pF
R
L
= 600Ω, C
L
=100pF
R
L
= 600Ω
0.7
4
1.3
68
12
MHz
V/μs
Degrees
dB
Doc ID 4949 Rev 4
5/18
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