TS925
Rail-to-Rail High Output Current Quad Operational Amplifiers
With Standby Mode and Adjustable Phantom Ground
■
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■
■
■
■
■
■
■
■
Rail-to-rail input and output
Low noise: 9nV/√Hz
Low distortion
High output current: 80mA (able to drive 32Ω
loads)
High-speed: 4MHz, 1.3V/
µ
s
Operating from 2.7V to 12V
Low input offset voltage: 900µV max. (TS925A)
Adjustable phantom ground (V
CC
/2)
Standby mode
ESD internal protection: 2kV
Latch-up immunity
N
DIP16
(Plastic Package)
D
SO-16
(Plastic Micropackage)
P
TSSOP16
(Thin Shrink Small Outline Package)
Description
The TS925 is a rail-to-rail quad BiCMOS
operational amplifier optimized and fully specified
for 3V and 5V 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
500pF. When the STANDBY mode is enabled, the
total consumption drops to 6µA (V
CC
= 3V).
Pin connections (top view)
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
Output 4
Inverting
Input 4
Non-inverting
Input 4
V
CC
-
Non-inverting
Input 3
Inverting
Input 3
Output 3
Stdby
Applications
■
Headphone amplifier
■
Soundcard amplifier, piezoelectric speaker
■
MPEG boards, multimedia systems...
■
Cordless telephones and portable
communication equipment
■
Line driver, buffer
■
Instrumentation with low noise as key factor
November 2005
Rev 2
1/17
www.st.com
17
TS925
Order Codes
Part Number
TS925IN
TS925ID/IDT
TS925IPT
TS925AIN
TS925AID
TS925AIPT
-40°C to +125°C
Temperature Range
Package
DIP16
SO-16
TSSOP16
DIP16
SO-16
TSSOP16
Packing
DIP16
SO-16
TSSOP16
DIP16
SO-16
TSSOP16
Marking
TS925IN
925I
TS925AIN
925AI
2/17
TS925
Absolute Maximum Ratings
1
Absolute Maximum Ratings
Table 1.
Symbol
VCC
Vid
V
i
T
j
R
thja
Key parameters and their absolute maximum ratings
Parameter
Supply voltage
(1)
Differential Input Voltage
(2)
Input Voltage
Maximum Junction Temperature
SO-16
Thermal Resistance Junction to
TSSOP16
Ambient
DIP16
SO-16
Thermal Resistance Junction to
TSSOP16
Case
DIP16
HBM
Human Body Model
(3)
MM
Machine Model
(4)
CDM
Charged Device Model
Output Short Circuit Duration
Latch-up Immunity
Soldering Temperature
10sec,
Pb-free package
Condition
Value
14
±1
V
DD
-0.3 to V
CC
+0.3
150
95
95
63
30
25
33
2
200
1
see note
(5)
200
260
mA
°C
Unit
V
V
V
°C
°C/W
R
thjc
°C/W
kV
V
kV
ESD
Electro-Static Discharge
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 > ±1V,
the maximum input current must not exceed ±1mA. In this case (Vid > ±1V) an input serie resistor must be
added to limit input current.
3. Human body model, 100pF discharged through a 1.5kΩ resistor into pin of device.
4. Machine model ESD, a 200pF cap is charged to the specified voltage, then discharged directly into the IC with
no external series resistor (internal resistor < 5Ω), 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 80mA, 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
3/17
Electrical Characteristics
TS925
2
Electrical Characteristics
Table 3.
Symbol
V
io
Electrical characteristics for V
CC
= 3V, V
DD
= 0V, V
icm
= V
CC
/2, R
L
connected
to V
CC
/2, T
amb
= 25°C (unless otherwise specified)
Parameter
Input Offset Voltage
Conditions
at T
amb
= +25°C
TS925
TS925A
at T
min.
≤
T
amb
≤
T
max
:
TS925
TS925A
3
0.9
5
1.8
2
V
out
= 1.5V
V
out
= 2.5V
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
200
35
16
4
60
V
cc
= 2.7 to 3.3V
60
50
0.7
R
L
= 600Ω, C
L
=100pF
R
L
= 600Ω, C
L
=100pF
f = 1kHz
V
out
= 2V
pk-pk
,
f = 1kHz, A
v
= 1,
R
L
= 600Ω
80
85
80
1.3
68
12
9
V/mV
2.90
2.87
2.63
50
100
180
1
15
30
100
µV/°C
nA
nA
Min.
Typ.
Max.
Unit
mV
DV
io
I
io
I
ib
V
OH
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
High Level Output Voltage
V
V
OL
Low Level Output Voltage
mV
A
vd
Large Signal Voltage Gain
GBP
CMR
SVR
I
o
SR
Pm
GM
e
n
THD
Gain Bandwidth Product
Common Mode Rejection Ratio
Supply Voltage Rejection Ratio
Output Short-Circuit Current
Slew Rate
Phase Margin at Unit Gain
Gain Margin
Equivalent Input Noise Voltage
Total Harmonic Distortion
R
L
= 600Ω
MHz
dB
dB
mA
V/µs
Degrees
dB
nV
-----------
-
Hz
0.01
%
C
s
Channel Separation
120
dB
4/17
TS925
Table 4.
Symbol
I
CC
I
stby
Electrical Characteristics
Global circuit
Parameter
Total Supply Current
Total Supply Current in STANDBY
(1)
Conditions
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
Min.
Typ
5
6
Max.
7
Unit
mA
µA
V
enstby
Pin 9 Voltage to enable the
STANDBY mode
V
distby
Pin 9 Voltage to disable the
STANDBY
mode
(1)
0.3
0.4
1.1
1
V
V
1. The STANDBY mode is currently enabled when Pin 9 is GROUNDED and disabled when Pin 9 is left OPEN.
Table 5.
Symbol
V
pg
I
pgsc
Z
pg
E
npg
Phantom ground
Parameter
Phantom Ground Output Voltage
Phantom Ground Output Short
Circuit Current - Sourced
Phantom Ground Impedance
Phantom Ground Output Voltage
Noise
DC to 20kHz
f = 1kHz
C
dec
= 100pF
C
dec
= 1nF
C
dec
= 10nF
(1)
12
Conditions
No Output Current
Min.
V
cc/2
-5%
12
Typ
V
cc/2
Max.
V
cc/2
+5%
Unit
V
mA
Ω
nV
-----------
-
Hz
18
3
200
40
17
18
I
pgsk
Phantom Ground Output Short
Circuit Current - Sinked
mA
1. C
dec
is the decoupling capacitor on Pin9.
5/17
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