TS271C,I,M
PROGRAMMABLE CMOS
SINGLE OPERATIONAL AMPLIFIERS
.
.
.
.
.
.
.
OFFSET NULL CAPABILITY (by external
compensation)
DYNAMIC CHARACTERISTICS
ADJUSTABLE BY I
SET
CONSUMPTION CURRENT AND DYNAMIC
PARAMETERS ARE STABLE REGARDING
THE VOLTAGE POWER SUPPLY
VARIATIONS
OUTPUT VOLTAGE CAN SWING TO
GROUND
VERY LARGE I
SET
RANGE
STABLE AND LOW OFFSET VOLTAGE
THREE INPUT OFFSET VOLTAGE
SELECTIONS
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
DESCRIPTION
The TS271 is a low cost, low power single opera-
tional amplifier designed to operate with single or
ORDER CODES
Part Number
TS271C/AC/BC
TS271I/AI/BI
TS271M/AM/BM
Example :
TS271ACN
Temperature
Range
0 C, +70 C
-40 C, +125 C
-55 C, +125 C
o
o
o
o
o
o
Package
N
q
q
q
D
q
q
q
dual supplies. This operational amplifier uses the
SGS-THOMSON silicon gate CMOS process giv-
ing it an excellent consumption-speed ratio. This
amplifier is ideally suited for low consumption
applications.
The power supply is externally programmable with
a resistor connectedbetween pins 8 and 4. It allows
to choose the best consumption-speed ratio and
supply current can be minimized according to the
required speed. This device is specified for the
following I
SET
current values : 1.5µA, 25µA, 130µA.
This CMOS amplifier offers very high input imped-
ance and extremely low input currents. The major
advantage versus JFET devices is the very low
input currents drift with temperature (see figure 3).
PIN CONNECTIONS
(top view)
1
2
3
4
-
+
8
7
6
5
1 - Offset Null 1
2 - Inverting Input
3 - Non-inverting Input
4 - V
CC
-
5 - Offset Null 2
6 - Output
7 -V
+
CC
8 -I
SET
October 1997
1/15
TS271C,I,M
BLOCK DIAGRAM
V
CC
Output
stage
Input
differential
Second
stage
Output
V
CC
Offset null
E
Iset
Input
E
Input
MAXIMUM RATINGS
Symbol
V
CC
V
id
V
i
I
O
I
in
T
oper
+
Parameter
Supply Voltage - (note 1)
Differential Input Voltage - (note 2)
Input Voltage - (note 3)
Output Current for
Input Current
Operating Free-Air Temperature Range
TS271C/AC/BC
TS271I/AI/BI
TS271M/AM/BM
V
CC+
≥
15V
Value
18
±18
-0.3 to 18
±30
±5
0 to +70
-40 to +125
-55 to +125
-65 to +150
Unit
V
V
V
mA
mA
o
C
T
stg
Storage Temperature Range
o
C
Notes : 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 the input and the output voltages must never exceed the magnitude of the positive supply voltage.
OPERATING CONDITIONS
Symbol
V
CC
+
Parameter
Supply Voltage
Common Mode Input Voltage Range
Value
3 to 16
0 to V
CC
- 1.5
+
Unit
V
V
V
icm
2/15
V
CC
SCHEMATIC DIAGRAM
T27
T10
T5
T6
T26
T28
T8
T1
R1
T11
T12
T2
Input +
T15
Input -
C1
T7
Set Current
C2
Output
T3
T4
T16
T13
T9
T14
T29
Offset Null 1
Offset Null 2
V
CC
TS271C,I,M
3/15
TS271C,I,M
OFFSET VOLTAGE NULL CIRCUIT
RESISTOR BIASING
V
CC
V
CC
5
1
8
25k
Ω
V
CC
R
set
V
O
V
O
R
set
R
set
V
CC
V
CC
OFFSET COMPENSATION GUARANTEED FOR
TS271BCX (I
SET
> 25µA),TS271ACX (I
SET
> 90µA)
R
SET
CONNECTED TO
GROUND
R
SET
CONNECTED TO
V
CC-
(R
SET
VALUE : SEE
Fig.1)
Figure 1 :
R
SET
Connected to V
CC-
.
V
V
R
set
CC
CC
= +3V
= +5V
V
V
CC
CC
= +10V
= +16V
10M
Ω
1M
Ω
100k
Ω
Ω
0. 1
µ
A
10k
1
µ
A
1 0
µ
A
1 0 0
µ
A
I
set
4/15
TS271C,I,M
ELECTRICAL CHARACTERISTICS FOR I
SET
= 1.5µA
V
CC+
= +10V, V
CC-
= 0V, T
amb
= 25
o
C (unless otherwise specified)
Symbol
V
io
Parameter
Input Offset Voltage
V
O
= 1.4V, V
ic
= 0V TS271C/I/M
TS271AC/AI/AM
TS271BC/BI/BM
T
min.
≤
T
amb
≤
T
max.
TS271C/I/M
TS271AC/AI/AM
TS271BC/BI/BM
DV
io
I
io
Input Offset Voltage Drift
Input Offset Current - (note 1)
V
ic
= 5V, V
o
= 5V
T
min
.
≤
T
amb
≤
T
max
.
Input Bias Current - (note 1)
V
ic
= 5V, V
o
= 5V
T
min
.
≤
T
amb
≤
T
max
.
High Level Output Voltage
V
id
= 100mV, R
L
= 1MΩ
T
min
.
≤
T
amb
≤
T
max
.
Low Level Output Voltage (V
id
= -100mV)
Large Signal Voltage Gain
V
o
= 1V to 6V, R
L
= 1MΩ, V
ic
= 5V
T
min
.
≤
T
amb
≤
T
max
.
Gain Bandwidth Product (A
v
= 40dB,
R
L
= 1MΩ, C
L
= 100pF, f
in
= 10kHz)
Common Mode Rejection Ratio
V
o
= 1.4V, V
ic
= 1V to 7.4V
Supply Voltage Rejection Ratio
+
V
CC
= 5V to 10V ,V
o
= 1.4V
Supply Current
A
v
= 1, no load, V
o
= 5V
T
min
.
≤
T
amb
≤
T
max.
Output Short Circuit Current
V
id
= 100mV, V
o
= 0V
Output Sink Current
V
id
= -100mV, V
o
= V
CC
Slew-Rate at Unity Gain
R
L
= 1MΩ, C
L
= 100pF, V
i
= 3 to 7V
Phase Margin at Unity Gain
A
v
= 40dB, R
L
= 1MΩ
C
L
= 10pF
C
L
= 100pF
Overshoot Factor
C
L
= 10pF
C
L
= 100pF
e
n
Equivalent Input Noise Voltage
f = 1kHz, R
S
= 100Ω
40
70
68
40
70
68
nV
Hz
√
60
60
30
20
100
8.8
8.7
0.7
1
100
1
150
9
50
30
20
100
MHz
0.1
80
80
10
15
17
60
60
0.1
dB
80
dB
80
10
15
18
µA
8.8
8.6
9
50
mV
V/mV
1
300
V
TS271C/AC/BC
Min.
Typ.
1.1
0.9
0.25
Max.
10
5
2
12
6.5
3
0.7
1
200
pA
TS271I/AI/BI
TS271M/AM/BM
Min.
Typ.
1.1
0.9
0.25
Max.
mV
10
5
2
12
6.5
3.5
µV/
o
C
pA
Unit
I
ib
V
OH
V
OL
A
vd
GBP
CMR
SVR
I
CC
I
o
I
sink
SR
∅m
mA
60
45
0.04
60
mA
45
V/µs
0.04
Degrees
35
10
35
10
%
K
ov
Note :
1. Maximum values including unavoidable inaccuracies of the industrial test.
5/15
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