TS1100
A 1µA, +2V to +25V SOT23 Precision Current-Sense Amplifier
FEATURES
♦ Improved Electrical Performance over the
MAX9938 and the MAX9634
♦ Ultra-Low Supply Current: 1μA
♦ Wide Input Common Mode Range: +2V to +25V
♦ Low Input Offset Voltage: 100μV (max)
♦ Low Gain Error: <0.5%(max)
♦ Voltage Output
♦ Four Gain Options Available:
TS1100-25: Gain = 25V/V
TS1100-50: Gain = 50V/V
TS1100-100: Gain = 100V/V
TS1100-200: Gain = 200V/V
♦ 5-Pin SOT23 Packaging
DESCRIPTION
The voltage-output TS1100 current-sense amplifiers
are form-factor identical and electrical improvements
to the MAX9938 and the MAX9634 current-sense
amplifiers. Consuming a very low 1μA supply current,
the TS1100 high-side current-sense amplifiers exhibit
a 100-µV (max) V
OS
and a 0.5% (max) gain error,
both specifications optimized for any precision current
measurement. For all high-side current-sensing
applications, the TS1100 features a wide input
common-mode voltage range from 2V to 25V.
The SOT23 package makes the TS1100 an ideal
choice for pcb-area-critical, low-current, high-
accuracy current-sense applications in all battery-
powered, remote or hand-held portable instruments.
All TS1100s are specified for operation over the
-40°C to +105°C extended temperature range.
APPLICATIONS
Notebook Computers
Current-Shunt Measurement
Power Management Systems
Battery Monitoring
Motor Control
Load Protection
Smart Battery Packs/Chargers
TYPICAL APPLICATION CIRCUIT
Input Offset Voltage Histogram
35
30
PERCENT OF UNITS - %
25
20
15
10
5
0
0
10
20
30
40
50
INPUT OFFSET VOLTAGE - µV
The Touchstone Semiconductor logo is a registered
trademark of Touchstone Semiconductor, Incorporated.
PART
TS1100-25
TS1100-50
TS1100-100
TS1100-200
GAIN OPTION
25 V/V
50 V/V
100 V/V
200 V/V
Page 1
© 2011 Touchstone Semiconductor, Inc. All rights reserved.
TS1100
ABSOLUTE MAXIMUM RATINGS
RS+, RS- to GND ..............................................-0.3V to +27V
OUT to GND........................................................-0.3V to +6V
RS+ to RS- ..................................................................... ±27V
Short-Circuit Duration: OUT to GND .................... Continuous
Continuous Input Current (Any Pin) ............................ ±20mA
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (Derate at 3.9mW/°C above +70°C).. 312mW
Operating Temperature Range .................... -40°C to +105°C
Junction Temperature ................................................ +150°C
Storage Temperature Range ....................... -65°C to +150°C
Lead Temperature (Soldering, 10s) ........................... +300°C
Soldering Temperature (Reflow) ............................ +260°C
Electrical and thermal stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These
are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections
of the specifications is not implied. Exposure to any absolute maximum rating conditions for extended periods may affect device reliability and
lifetime.
PACKAGE/ORDERING INFORMATION
ORDER NUMBER PART MARKING CARRIER QUANTITY
TS1100-25EG5TP
TADJ
TS1100-25EG5T
TS1100-50EG5TP
TADK
TS1100-50EG5T
TS1100-100EG5TP
TS1100-100EG5T
TS1100-200EG5TP
TADM
TS1100-200EG5T
TADL
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
-----
3000
-----
3000
-----
3000
-----
3000
Lead-free Program:
Touchstone Semiconductor supplies only lead-free packaging.
Consult Touchstone Semiconductor for products specified with wider operating temperature ranges.
Page 2
TS1100DS r1p0
RTFDS
TS1100
ELECTRICAL CHARACTERISTICS
V
RS+
= V
RS-
= 3.6V; V
SENSE
= (V
RS+
- V
RS-
) = 0V; C
OUT
= 47nF; T
A
= -40°C to +105°C, unless otherwise noted.
Typical values are at T
A
= +25°C. See Note 1
PARAMETER
Supply Current (Note 2)
Common-Mode Input Range
Common-Mode Rejection
Ratio
Input Offset Voltage (Note 3)
SYMBOL
I
CC
V
RS+
= 25V
V
CM
CMRR
V
OS
CONDITIONS
T
A
= +25°C
T
A
= +25°C
2
120
150
±30
25
50
100
200
±0.1
TS1100-25/50/100
TS1100-200
Gain = 25
Gain = 50
Gain = 100
Gain = 200
V
OH
= V
RS-
- V
OUT
TS1100-25/50/100
TS1100-200
7.0
14.0
10
20
±100
±200
MIN
TYP
0.68
MAX
0.85
1.0
1.0
1.2
25
UNITS
μA
Guaranteed by CMRR
2V < V
RS+
< 25V
T
A
= +25°C
TS1100-25
TS1100-50
TS1100-100
TS1100-200
T
A
= +25°C
V
dB
μV
Gain
G
V/V
±0.5
±0.6
13.2
26.4
5
10
20
40
0.2
%
kΩ
Gain Error (Note 4)
Output Resistance (Note 5)
GE
R
OUT
OUT Low Voltage
OUT High Voltage (Note 6)
Output Settling Time
V
OL
V
OH
t
S
mV
V
ms
ms
1% final value,
V
SENSE
= 50mV
0.05
2.2
4.3
Note 1:
All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by product
characterization.
Note 2:
Extrapolated to V
OUT
= 0. I
CC
is the total current into the RS+ and the RS- pins.
Note 3:
Input offset voltage V
OS
is extrapolated from V
OUT
with V
SENSE
set to 1mV.
Note 4:
Gain error is calculated by applying two values for V
SENSE
and then calculating the error of the actual slope vs. the
ideal transfer characteristic:
For GAIN = 25, the applied V
SENSE
is 20mV and 120mV.
For GAIN = 50, the applied V
SENSE
is 10mV and 60mV.
For GAIN = 100, the applied V
SENSE
is 5mV and 30mV.
For GAIN = 200, the applied V
SENSE
is 2.5mV and 15mV.
Note 5:
The device is stable for any capacitive load at V
OUT
.
Note 6:
V
OH
is the voltage from V
RS-
to V
OUT
with V
SENSE
= 3.6V/GAIN.
TS1100DS r1p0
Page 3
RTFDS
TS1100
TYPICAL PERFORMANCE CHARACTERISTICS
V
RS+
= V
RS-
= 3.6V; T
A
= +25°C, unless otherwise noted.
Input Offset Voltage Histogram
35
30
PERCENT OF UNITS - %
25
20
15
10
5
0
0
10
20
30
40
50
PERCENT OF UNITS - %
30
25
20
15
10
5
0
-0.4
-0.2
0
0.2
0.4
Gain Error Histogram
INPUT OFFSET VOLTAGE - µV
Supply Current vs Temperature
1
INPUT OFFSET VOLTAGE - µV
GAIN ERROR - %
Input Offset Voltage vs Common-Mode Voltage
40
SUPPLY CURENT - µA
0.8
25V
0.6
3.6V
2V
35
30
0.4
25
0.2
0
-40
-15
10
35
60
85
110
20
0
5
10
15
20
25
30
TEMPERATURE -
°C
Input Offset Voltage vs Temperature
80
INPUT OFFSET VOLTAGE - µV
60
40
20
0
-20
-40
-40
-15
10
35
60
85
110
1
SUPPLY VOLTAGE - Volt
Supply Current vs Common-Mode Voltage
SUPPLY CURRENT - µA
0.8
0.6
0.4
0.2
0
0
5
10
15
20
25
30
TEMPERATURE -
°C
SUPPLY VOLTAGE - Volt
Page 4
TS1100DS r1p0
RTFDS
TS1100
TYPICAL PERFORMANCE CHARACTERISTICS
V
RS+
= V
RS-
= 3.6V; T
A
= +25°C, unless otherwise noted.
Gain Error vs Common-Mode Voltage
0.3
0.5
0.4
GAIN ERROR - %
0.2
GAIN ERROR - %
0.3
0.2
0.1
0
0
0
5
10
15
20
25
30
-0.1
-40
Gain Error vs. Temperature
0.1
-15
10
35
60
85
110
SUPPLY VOLTAGE - Volt
V
OUT
vs V
SENSE
@ Supply = 3.6V
4
G = 100
3.5
3
G = 50
V
OUT
- V
V
OUT
- V
2.5
2
1.5
1
0.5
0
0
50
100
V
SENSE
- mV
Small-Signal Gain vs Frequency
5
0
SMALL-SIGNAL GAIN -dB
-5
-10
-15
-20
-25
-30
-35
0.001 0.01 0.1
1
10
100
1000
G = 100
G = 25
COMMON-MODE REJECTION - dB
G = 50
0
-20
150
G = 25
2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
TEMPERATURE -
°C
V
OUT
vs V
SENSE
@ Supply = 2V
G = 100
G = 50
G = 25
20
40
60
80
100
V
SENSE
- mV
Common-Mode Rejection vs Frequency
G = 50, 100
-40
-60
G = 25
-80
-100
-120
-140
0.001 0.01 0.1
1
10
100
1000
FREQUENCY - kHz
FREQUENCY - kHz
TS1100DS r1p0
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RTFDS
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