TS1103
A 1µA, 200µV
OS
Bidirectional Precision Current-Sense Amplifier
FEATURES
♦
Ultra-Low Supply Current: 1μA
♦
Wide Input Common Mode Range: +2V to +27V
♦
Low Input Offset Voltage: 200μV (max)
♦
Low Gain Error: 0.6% (max)
♦
Voltage Output
♦
Four Gain Options Available:
TS1103-25: Gain = 25V/V
TS1103-50: Gain = 50V/V
TS1103-100: Gain = 100V/V
TS1103-200: Gain = 200V/V
♦
6-Lead SOT23 Packaging
DESCRIPTION
The TS1103 is the latest addition to the TS1101
family of bidirectional current-sense amplifiers.
Consuming a very low 1μA supply current, the
TS1103 high-side current-sense amplifiers combine a
200-µV (max) V
OS
and a 0.6% (max) gain error for
cost-sensitive applications. For all high-side
bidirectional
current-sensing
applications,
the
TS1103s 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 TS1103’s RS+ and
RS- input terminals.
The SOT23 package makes the TS1103 an ideal
choice for pcb-area-critical, supply-current-conscious,
high-accuracy current-sense applications in all
battery-powered and portable instruments.
All TS1103s are specified for operation over the
-40°C to +105°C extended temperature range.
APPLICATIONS
Notebook Computers
Power Management Systems
Portable/Battery-Powered Systems
Smart Chargers
Smart Phones
TYPICAL APPLICATION CIRCUIT
SIGN Comparator’s Symmetric I
LOAD
Crossover
PART
TS1103-25
TS1103-50
TS1103-100
TS1103-200
GAIN OPTION
25 V/V
50 V/V
100 V/V
200 V/V
Page 1
© 2014 Silicon Laboratories, Inc. All rights reserved.
TS1103
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
TS1103-25EG6
TADW
TS1103-25EG6T
TS1103-50EG6
TADX
TS1103-50EG6T
TS1103-100EG6
TADY
TS1103-100EG6T
TS1103-200EG6
TADZ
TS1103-200EG6T
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
TS1103 Rev. 1.1
TS1103
ELECTRICAL CHARACTERISTICS
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.
PARAMETER
Supply Current (Note 2)
SYMBOL
I
CC
V
RS+
= 25V
CONDITIONS
T
A
= +25°C
T
A
= +25°C
2
120
150
±30
10
25
50
100
200
±0.2
±0.2
7.0
14.0
10
20
MIN
TYP
0.68
MAX
0.85
1.0
1.0
1.2
27
UNITS
μA
V
dB
±200
±300
μV
µV
V/V
±0.6
±1.0
±0.6
±1
13.2
26.4
5
10
20
40
0.2
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
V
HYS
G
T
A
= +25°C
TS1103-25
TS1103-50
TS1103-100
TS1103-200
T
A
= +25°C
T
A
= +25°C
TS1103-25/50/100
TS1103-200
Gain = 25
Gain = 50
Gain = 100
Gain = 200
V
OH
= V
RS-
- V
OUT
TS1103-25/50/100
TS1103-200
Gain Error (Note 5)
Gain Match (Note 5)
Output Resistance (Note 6)
GE
GM
R
OUT
%
%
kΩ
OUT Low Voltage
OUT High Voltage (Note 7)
Output Settling Time
V
AOL
V
AOH
t
S
mV
V
ms
1% final value, V
OUT
= 3V
1.25
0.05
2.2
4.3
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
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
0.02
5.5
0.2
0.2
V
µA
V
V
V
DD
– 0.2
3
0.4
ms
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,
V
OUT-
- V
OUT+
2 x GAIN
Average V
OS
=
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.
TS1103 Rev. 1.1
Page 3
TS1103
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
-10
10
20
30
40
50
60
PERCENT OF UNITS - %
35
30
25
20
15
10
5
0
-0.6 -0.4 -0.2
0
0.2
0.4
0.6
Gain Error Histogram
INPUT OFFSET VOLTAGE - µV
GAIN ERROR - %
Supply Current vs Temperature
1
INPUT OFFSET VOLTAGE - µV
110
Input Offset Voltage vs Common-Mode Voltage
40
SUPPLY CURENT - µA
0.8
25V
0.6
2V
35
30
0.4
3.6V
25
0.2
0
-40
-15
10
35
60
85
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
TEMPERATURE -
°C
SUPPLY CURRENT - µA
1
SUPPLY VOLTAGE - Volt
Supply Current vs Common-Mode Voltage
0.8
0.6
0.4
0.2
0
0
5
10
15
20
25
30
SUPPLY VOLTAGE - Volt
Page 4
TS1103 Rev. 1.1
TS1103
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 - %
GAIN ERROR - %
0.2
0.1
0
-0.1
-0.2
0
0
5
10
15
20
25
30
-0.3
-40
Gain Error vs. Temperature
0.2
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
V
OUT
- V
V
OUT
- V
2.5
2
G = 25
1.5
1
0.5
0
0
50
100
V
SENSE
- mV
Small-Signal Gain vs Frequency
5
0
SMALL-SIGNAL GAIN -dB
G = 50
-5
-10
-15
-20
-25
-30
-35
0.001 0.01
G = 100
G = 25
COMMON-MODE REJECTION - dB
0
-20
150
G = 50
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
0.1
1
10
100
1000
FREQUENCY - kHz
FREQUENCY - kHz
TS1103 Rev. 1.1
Page 5
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