TS1101
A 1µA, +2V to +27V Bidirectional Precision Current-Sense Amplifier
FEATURES
DESCRIPTION
♦ Ultra-Low Supply Current: 1μA
♦ Wide Input Common Mode Range: +2V to +27V
♦ Low Input Offset Voltage: 100μV (max)
♦ Low Gain Error: 0.6% (max)
♦ Voltage Output
♦ SIGN Comparator Output: No “Dead Zone”
at I
LOAD
Switchover
♦ Four Gain Options Available:
TS1101-25: Gain = 25V/V
TS1101-50: Gain = 50V/V
TS1101-100: Gain = 100V/V
TS1101-200: Gain = 200V/V
♦ 6-Lead SOT23 Packaging
The bi-directional, voltage-output TS1101 current-
sense amplifiers are the lowest-power and most
accurate current-sense amplifiers available today.
Consuming a very low 1μA supply current, the
TS1101 high-side current-sense amplifiers exhibit a
100-µV (max) V
OS
and a 0.6% (max) gain error, both
specifications optimized for any precision current
measurement. For all high-side bidirectional current-
sensing applications, the TS1101s are self-powered
and feature a wide input common-mode voltage
range from 2V to 27V. A SIGN comparator digital
output is also provided that indicates the direction of
current flow depending on the external connections to
the TS1101’s RS+ and RS- input terminals.
The SOT23 package makes the TS1101 an ideal
choice for pcb-area-critical, supply-current-conscious,
high-accuracy current-sense applications in all
battery-powered and portable instruments.
All TS1101s are specified for operation over the
-40°C to +105°C extended temperature range.
Notebook Computers
Power Management Systems
Portable/Battery-Powered Systems
Smart Chargers
Smart Phones
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
SIGN Comparator’s Symmetric I
LOAD
Switchover
PA`RT
TS1101-25
TS1101-50
TS1101-100
TS1101-200
GAIN OPTION
25 V/V
50 V/V
100 V/V
200 V/V
Page 1
© 2014 Silicon Laboratories, Inc. All rights reserved.
TS1101
ABSOLUTE MAXIMUM RATINGS
RS+, RS- to GND ..............................................-0.3V to +27V
V
DD
, OUT, SIGN to GND ....................................... -0.3V to +6
RS+ to RS- ..................................................................... ±28V
Short-Circuit Duration: OUT to GND .................... Continuous
Continuous Input Current (Any Pin) ............................ ±20mA
Continuous Power Dissipation (T
A
= +70°C)
6-Lead SOT23 (Derate at 4.5mW/°C above +70°C)
............................................................................... 360mW
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
TS1101-25EG6
TS1101-25EG6T
TS1101-50EG6
TS1101-50EG6T
TS1101-100EG6
TS1101-100EG6T
TS1101-200EG6
TS1101-200EG6T
TADN
TADP
TADQ
TADR
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
-----
3000
-----
3000
-----
3000
-----
3000
Lead-free Program:
Silicon Labs supplies only lead-free packaging.
Consult Silicon Labs for products specified with wider operating temperature ranges.
Page 2
TS1101 Rev. 1.1
TS1101
ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Current (Note 2)
SYMBOL
I
CC
CONDITIONS
T
A
= +25°C
V
RS+
= 25V
T
A
= +25°C
2
120
150
±30
10
25
50
100
200
±0.2
±0.2
7.0
14.0
10
20
V
RS+
= 3.6V; V
SENSE
= (V
RS+
- V
RS-
) = 0V; C
OUT
= 47nF; V
DD
= 1.8V; T
A
= -40°C to +105°C, unless otherwise noted.
Typical values are at T
A
= +25°C. See Note 1.
MIN
TYP
0.68
MAX
0.85
1.0
1.0
1.2
27
±100
±200
UNITS
μA
V
dB
μV
µV
V/V
±0.6
±1.0
±0.6
±1
13.2
26.4
5
10
20
40
0.2
%
%
kΩ
mV
V
ms
ms
V
μA
V
V
3
0.4
ms
Common-Mode Input Range
V
CM
Guaranteed by CMRR
CURRENT SENSE AMPLIFIER PARAMETERS
Common-Mode Rejection Ratio
CMRR
2V < V
RS+
< 27V
T
A
= +25°C
Input Offset Voltage (Note 3)
V
OS
V
OS
Hysteresis (Note 4)
Gain
Gain Error (Note 5)
Gain Match (Note 5)
Output Resistance (Note 6)
OUT Low Voltage
OUT High Voltage (Note 7)
Output Settling Time
V
HYS
G
GE
GM
R
OUT
V
AOL
V
AOH
t
S
T
A
= +25°C
TS1101-25
TS1101-50
TS1101-100
TS1101-200
T
A
= +25°C
T
A
= +25°C
TS1101-25/50/100
TS1101-200
Gain = 25
Gain = 50
Gain = 100
Gain = 200
V
OH
= V
RS-
- V
OUT
TS1101-25/50/100
TS1101-200
1% final value, V
OUT
= 3V
1.25
SIGN COMPARATOR PARAMETERS
VDD Supply Voltage Range
V
DD
VDD Supply Current
I
DD
Output Low Voltage
Output High Voltage
Propagation Delay
V
COL
V
COH
t
PD
0.05
2.2
4.3
0.02
V
DD
= 1.25V, I
SINK
= 5µA
V
DD
= 1.8V, I
SINK
= 35µA
V
DD
= 1.25V, I
SOURCE
= 5µA
V
DD
= 1.8V, I
SOURCE
= 35µA
V
SENSE
= ±1mV
V
SENSE
= ±10mV
5.5
0.2
0.2
V
DD
– 0.2
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 a V
OUT+
measurement with V
SENSE
set to +1mV and a V
OUT-
measurement
with V
SENSE
set to -1mV; vis-a-viz,
Average V
OS
=
(V
OUT-
)
-
(V
OUT+
)
2 x GAIN
Note 4:
Amplitude of V
SENSE
lower or higher than V
OS
required to cause the comparator to switch output states.
Note 5:
Gain error applies to current flow in either direction and 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 6:
The device is stable for any capacitive load at V
OUT
.
Note 7:
V
OH
is the voltage from V
RS-
to V
OUT
with V
SENSE
= 3.6V/GAIN.
TS1101 Rev. 1.1
Page 3
TS1101
35
30
PERCENT OF UNITS - %
25
20
15
10
5
0
-10
10
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
20
30
40
50
60
-0.6 -0.4 -0.2
0
0.2
0.4
0.6
INPUT OFFSET VOLTAGE - µV
Supply Current vs Temperature
1
0.8
0.6
0.4
0.2
0
-40
-15
10
35
60
85
110
TEMPERATURE -
°C
Input Offset Voltage vs Temperature
80
INPUT OFFSET VOLTAGE - µV
60
40
20
0
-20
-40
SUPPLY CURRENT - µA
1
0.8
0.6
0.4
0.2
0
3.6V
INPUT OFFSET VOLTAGE - µV
GAIN ERROR - %
Input Offset Voltage vs Common-Mode Voltage
40
Gain Error Histogram
SUPPLY CURENT - µA
25V
2V
35
30
25
20
0
5
10
15
20
25
30
SUPPLY VOLTAGE - Volt
Supply Current vs Common-Mode Voltage
-40
-15
10
35
60
85
110
0
5
10
15
20
25
30
TEMPERATURE -
°C
SUPPLY VOLTAGE - Volt
Page 4
TS1101 Rev. 1.1
TS1101
TYPICAL PERFORMANCE CHARACTERISTICS
V
RS+
= V
RS-
= 3.6V; T
A
= +25°C, unless otherwise noted.
Gain Error vs Common-Mode Voltage
0.3
0.4
0.3
GAIN ERROR - %
0.2
GAIN ERROR - %
0.2
0.1
0
-0.1
-0.2
0
0
5
10
15
20
25
30
-0.3
-40
-15
10
35
60
85
110
Gain Error vs. Temperature
0.1
SUPPLY VOLTAGE - Volt
V
OUT
vs V
SENSE
@ Supply = 3.6V
4
3.5
3
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
-40
-60
-80
-100
-120
-140
0.001 0.01
150
G = 50
G = 25
G = 100
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
G =25
0.1
1
10
100
1000
FREQUENCY - kHz
FREQUENCY - kHz
TS1101 Rev. 1.1
Page 5
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