ST TS971, TS972, TS974 User Manual
TS971, TS972, TS974
Output rail-to-rail very low noise operational amplifier
Features
■ Rail-to-rail output voltage swing
±2.4 V at V
= ±2.5 V
CC
■ Very low noise level: 4 nV/√Hz
■ Ultra low distortion: 0.003%
■ High dynamic features: 12 MHz, 4 V/µs
■ Operating range: 2.7 to 10 V
■ ESD protection (2 kV)
■ Latch-up immunity (class A)
Applications
■ Portable devices (CD players, PDAs)
■ Portable communication (cell phones, pagers)
■ Instrumentation and sensoring
■ Professional audio circuits
Description
The TS97x family of operational amplifiers
operates with voltages as low as ±1.35 V and
features output rail-to-rail signal swing. The
TS97x are particularly well suited for portable and
battery-supplied equipment. Very low noise and
low distortion characteristics make them ideal for
audio pre-amplification.
The TS971 is available in a variety of packages to
suit all types of applications. For applications
where space-saving is critical, the SOT23
package (2.8 x 2.9 mm) or the DFN package
(3 x 3 mm) simplify the board design because
they can be placed everywhere.
Non-inverting input
TS971ID-TS971IDT (SO-8)
Inverting Input 1
Non-inverting Input 1
TS972ID-TS972IDT (SO-8)
Output 1
Inverting Input 1
Non-inverting Input 1
Output 1
Output 1
Inverting Input 1
Inverting Input 1
Non Inverting Input 1
Non Inverting Input 1
VDD
VDD
TS974ID-TS974IDT (SO-14)
Inverting Input 1
Non-inverting Input 1
Non-inverting Input 2
Inverting Input 2
TS971ILT (SOT23-5L)
Output
V
1
2
DD
3
1
N.C.
2
-
+
3
V
4
DD
V
5
CC
Inverting input
4
N.C.
8
7
6
5
V
CC
Output 2
N.C.
TS972IPT (TSSOP8)
1
-
2
+
3
V
45
DD
V
8
CC
Output 2
7
-
Inverting Input 2
6
+
Non-inverting Input 2
TS972IQT (DFN8)
1
1
2
2
3
3
45
45
8
8
VCC
VCC
7
7
Output 2
Output 2
Inverting Input 2
Inverting Input 2
6
6
Non Inverting Input 2
Non Inverting Input 2
TS974IPT (TSSOP14)
14
Output 1
Output 2
V
1
2
-
+
3
4
CC
5
+
-
6
7
13
-
+
12
11
10
+
-
9
8
Output 4
Inverting Input 4
Non-inverting Input 4
V
DD
Non-inverting Input 3
Inverting Input 3
Output 3
May 2010 Doc ID 6031 Rev 7 1/16
www.st.com
16
Absolute maximum ratings and operating conditions TS971, TS972, TS974
1 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings AMR
Symbol Parameter Value Unit
(3)
(1)
(6)
(2)
(5)
(7)
(4)
(4)
12 V
±1 V
V
DD
-0.3 to V
+0.3 V
CC
250
40
125
°C/W
105
120
100
81
5.2
40
°C/W
31
37
32
2kV
200 V
1.5 kV
V
CC
V
id
V
in
T
stg
T
R
thja
R
thjc
ESD
Supply voltage
Differential input voltage
Input voltage
Storage temperature range -65 to +150
Maximum junction temperature 150 °C
j
Thermal resistance junction to ambient
SOT23-5
DFN8
SO-8
SO-14
TSSOP8
TSSOP14
Thermal resistance junction to case
SOT23-5
DFN8
SO-8
SO-14
TSSOP8
TSSOP14
HBM: human body model
MM: machine model
CDM: charged device model
Lead temperature (soldering, 10sec) 260 °C
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.
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. Values are typical.
5. Human body model: a 100 pF 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 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 package are charged together to the specified voltage and then
discharged directly to ground through only one pin. This is done for all pins.
No value specified for CDM on SOT23-5 package.
2/16 Doc ID 6031 Rev 7
TS971, TS972, TS974 Absolute maximum ratings and operating conditions
Table 2. Operating conditions
Symbol Parameter Value Unit
V
V
T
CC
icm
oper
Supply voltage 2.7 to 10 V
Common mode input voltage range V
+1.15 to VCC -1.15 V
DD
Operating free air temperature range -40 to +125 °C
Doc ID 6031 Rev 7 3/16
Electrical characteristics TS971, TS972, TS974
2 Electrical characteristics
Table 3. V
= +2.5 V, V
CC
Symbol Parameter Conditions Min. Typ. Max. Unit
= -2.5 V, T
DD
= 25°C (unless otherwise specified)
amb
V
Input offset voltage
io
DV
V
Input offset voltage drift V
io
I
Input offset current V
io
I
Input bias current
ib
Common mode input voltage
icm
range
CMR Common mode rejection ratio V
SVR Supply voltage rejection ratio V
Large signal voltage gain RL = 2 kΩ 70 80 dB
A
vd
V
V
I
source
I
High level output voltage RL = 2 kΩ 22.4 V
OH
Low level output voltage RL = 2 kΩ -2.4 -2 V
OL
Output source current 1.5 mA
Output sink current 100 mA
sink
Supply current per amplifier Unity gain - no load 2 2.8 mA
I
CC
T
≤ T
min
amb
= 0 V, Vo = 0 V 5 µV/°C
icm
= 0 V, Vo = 0 V 10 150 nA
icm
= 0 V, Vo = 0 V
V
icm
T
≤ T
min
amb
= ±1.35 V 60 85 dB
icm
= ±2 V to ±3 V 60 70 dB
CC
GBP Gain bandwidth product f = 100 kHz, R
SR Slew rate A
∅m Phase margin at unit gain R
Gm Gain margin R
e
Equivalent input noise voltage f = 100 kHz 4 nV/√Hz
n
= 1, Vin = ±1 V 2.8 4 V/µs
V
= 2 kΩ, CL = 100 pF 60 Degrees
L
= 2 kΩ, CL = 100 pF 10 dB
L
THD Total harmonic distortion f = 1 kHz, A
15
≤ T
≤ T
max
max
200
200
7
750
1000
-1.35 1.35 V
= 2 kΩ, CL = 100 pF 8.5 12 MHz
L
= -1, RL = 10 kΩ 0.003 %
V
mV
nA
4/16 Doc ID 6031 Rev 7
TS971, TS972, TS974 Electrical characteristics
Figure 1. Input offset voltage distribution Figure 2. Voltage gain & phase vs. frequency
V
= 5 V
CC
Figure 3. Voltage gain & phase vs. frequency
V
= 2.7 V
CC
Figure 4. THS vs. V
out, VCC
= 5 V
Figure 5. THD vs. Vout, VCC = 2.7 V Figure 6. THD vs. frequency
Doc ID 6031 Rev 7 5/16
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