Burr-Brown INA200AIDGKRG4 High-side measurement current-shunt monitor with comparator and reference Datasheet

IN A
20
INA200
INA201
INA202
0
SBOS374 − NOVEMBER 2006
High-Side Measurement Current-Shunt Monitor
with Comparator and Reference
FEATURES
DESCRIPTION
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The INA200, INA201, and INA202 are high-side
current-shunt monitors with voltage output. The
INA200−INA202 can sense drops across shunts at
common-mode voltages from −16V to 80V. The
INA200−INA202 are available with three output voltage
scales: 20V/V, 50V/V, and 100V/V, with up to 500kHz
bandwidth.
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COMPLETE CURRENT SENSE SOLUTION
0.6V INTERNAL VOLTAGE REFERENCE
INTERNAL OPEN-DRAIN COMPARATOR
LATCHING CAPABILITY ON COMPARATOR
COMMON-MODE RANGE: −16V to +80V
HIGH ACCURACY: 3.5% MAX ERROR OVER
TEMPERATURE
BANDWIDTH: 500kHz (INA200)
QUIESCENT CURRENT: 1800µA (max)
PACKAGES: SO-8, MSOP-8
The INA200, INA201, and INA202 also incorporate an
open-drain comparator and internal reference providing a
0.6V threshold. External dividers are used to set the
current trip point. The comparator includes a latching
capability, which can be made transparent by grounding
(or leaving open) the RESET pin.
APPLICATIONS
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The INA200, INA201, and INA202 operate from a single
+2.7V to +18V supply, drawing a maximum of 1800µA of
supply current. Package options include the very small
MSOP-8 and the SO-8. All versions are specified over the
extended operating temperature range of −40°C to
+125°C.
NOTEBOOK COMPUTERS
CELL PHONES
TELECOM EQUIPMENT
AUTOMOTIVE
POWER MANAGEMENT
BATTERY CHARGERS
WELDING EQUIPMENT
1
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
V+
2 OUT
G
VIN+
8
VIN−
7
CMPOUT
6
0.6V
Reference
3 CMPIN
Comparator
4
GND
RESET 5
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright  2006, Texas Instruments Incorporated
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ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Current-Shunt Monitor Analog Inputs, VIN+, VIN−
Differential (VIN+) − (VIN−) . . . . . . . . . . . . . . . . . . −18V to +18V
Common Mode(2) . . . . . . . . . . . . . . . . . . . . . . . . −16V to +80V
Comparator Analog Input and Reset Pins(2) . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND − 0.3V to (V+) + 0.3V
Analog Output, Out(2) . . . . . . . . . . . . . GND − 0.3V to (V+) + 0.3V
Comparator Output, Out Pin(2) . . . . . . . . . . . . . GND − 0.3V to 18V
Input Current Into Any Pin(2) . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Operating Temperature . . . . . . . . . . . . . . . . . . . . . −55°C to +150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
ESD Ratings:
Human Body Model (HBM) . . . . . . . . . . . . . . . . . . . . . . . 4000V
Charged Device Model (CDM) . . . . . . . . . . . . . . . . . . . . 1000V
(1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only, and
functional operation of the device at these or any other conditions
beyond those specified is not supported.
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to observe
proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
(2) This voltage may exceed the ratings shown if the current at that
pin is limited to 5mA.
ORDERING INFORMATION(1)
PRODUCT
INA200
GAIN
20V/V
INA201
50V/V
INA202
100V/V
PACKAGE-LEAD
PACKAGE DESIGNATOR
PACKAGE MARKING
MSOP-8
DGK
BQH
SO-8(2)
D
INA200A
MSOP-8
DGK
BQJ
SO-8(2)
D
INA201A
MSOP-8
DGK
BQL
SO-8(2)
D
INA202A
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site
at www.ti.com.
(2) Available Q1, 2007.
PIN CONFIGURATIONS
TOP VIEW
INA200−INA202
V+
1
8
VIN+
OUT
2
7
VIN−
CMPIN
3
6
CMPOUT
GND
4
5
RESET
MSOP−8 (DGK)
SO−8 (D)
2
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ELECTRICAL CHARACTERISTICS: CURRENT-SHUNT MONITOR
Boldface limits apply over the specified temperature range: TA = −40°C to +125°C.
At TA = +25°C, VS = +12V, VCM = +12V, VSENSE = 100mV, RL = 10kΩ to GND, RPULL-UP = 5.1kΩ connected from CMPOUT to VS, and CMPIN = GND,
unless otherwise noted.
INA200, INA201, INA202
CURRENT-SHUNT MONITOR
PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNITS
0.15
(VS − 0.25)/Gain
80
V
V
dB
dB
mV
mV
mV
µV/°C
µV/V
µA
INPUT
Full-Scale Sense Input Voltage
Common-Mode Input Range
Common-Mode Rejection
Over Temperature
Offset Voltage, RTI(1)
+25°C to +125°C
−40°C to +25°C
vs Temperature
vs Power Supply
Input Bias Current, VIN− Pin
VSENSE
VCM
CMR
VSENSE = VIN+ − VIN−
VIN+ = −16V to +80V
VIN+ = +12V to +80V
VOS
dVOS/dT
PSR
IB
OUTPUT (VSENSE ≥ 20mV)
Gain:
INA200
INA201
INA202
Gain Error
Over Temperature
Total Output Error(2)
Over Temperature
Nonlinearity Error(3)
Output Impedance
Maximum Capacitive Load
TMIN to TMAX
VOUT = 2V, VIN+ = +18V, 2.7V
−16
80
100
100
123
±0.5
5
2.5
±9
±2.5
±3
±3.5
100
±16
G
VSENSE = 20mV to 100mV
VSENSE = 20mV to 100mV
VSENSE = 120mV, VS = +16V
VSENSE = 120mV, VS = +16V
VSENSE = 20mV to 100mV
RO
No Sustained Oscillation
20
50
100
±0.2
±0.75
±1
±2
±2.2
±3.5
V/V
V/V
V/V
%
%
%
%
%
Ω
nF
0.4
1
2
mV
V
V
V
mV
(V+) − 0.25
(VGND) + 0.05
V
V
±0.002
1.5
10
OUTPUT (VSENSE < 20mV)(4)
INA200, INA201, INA202
INA200
INA201
INA202
INA200, INA201, INA202
−16V ≤ VCM < 0V
0V ≤ VCM ≤ VS, VS = 5V
0V ≤ VCM ≤ VS, VS = 5V
0V ≤ VCM ≤ VS, VS = 5V
VS < VCM ≤ 80V
300
VOLTAGE OUTPUT(5)
Output Swing to the Positive Rail
Output Swing to GND(6)
VIN− = 11V, VIN+ = 12V
VIN− = 0V, VIN+ = −0.5V
(V+) − 0.15
(VGND) + 0.004
CLOAD = 5pF
CLOAD = 5pF
CLOAD = 5pF
CLOAD < 10nF
500
300
200
40
1
kHz
kHz
kHz
Degrees
V/µs
2
µs
40
nV/√Hz
FREQUENCY RESPONSE
Bandwidth:
INA200
INA201
INA202
Phase Margin
Slew Rate
Settling Time (1%)
NOISE, RTI
Voltage Noise Density
(1)
(2)
(3)
(4)
(5)
(6)
300
BW
SR
VSENSE = 10mVPP to 100mVPP,
CLOAD = 5pF
Offset is extrapolated from measurements of the output at 20mV and 100mV VSENSE.
Total output error includes effects of gain error and VOS.
Linearity is best fit to a straight line.
For details on this region of operation, see the Accuracy Variations as a Result of VSENSE and Common-Mode Voltage section in the Applications Information.
See Typical Characteristic curve Output Swing vs Output Current.
Specified by design.
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ELECTRICAL CHARACTERISTICS: COMPARATOR
Boldface limits apply over the specified temperature range: TA = −40°C to +125°C.
At TA = +25°C, VS = +12V, VCM = +12V, VSENSE = 100mV, RL = 10kΩ to GND, and RPULL-UP = 5.1kΩ connected from CMPOUT to VS, unless otherwise
noted.
INA200, INA201, INA202
COMPARATOR PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNITS
TA = +25°C
590
586
600
610
614
mV
mV
mV
10
15
nA
nA
OFFSET VOLTAGE
Threshold
Over Temperature
Hysteresis (1)
TA = −40°C to +85°C
INPUT BIAS CURRENT(2)
CMPIN Pin
vs Temperature
0.005
INPUT VOLTAGE RANGE
CMPIN Pin
OUTPUT (OPEN-DRAIN)
Large-Signal Differential Voltage Gain
High-Level Leakage Current(3)(4)
Low-Level Output Voltage(3)
RESPONSE TIME
Response Time(5)
−8
0V to VS − 1.5V
ILKG
VOL
V
CMP VOUT 1V to 4V, RL ≥ 15kΩ Connected to 5V
VID = 0.4V, VOH = VS
VID = −0.6V, IOL = 2.35mA
200
0.0001
220
RL to 5V, CL = 15pF, 100mV Input Step with 5mV Overdrive
1.3
µs
1.1
2
1.5
3
V
MΩ
µs
µs
RESET
RESET Threshold(6)
Logic Input Impedance
Minimum RESET Pulse Width
RESET Propagation Delay
1
300
V/mV
µA
mV
(1) Hysteresis refers to the threshold (the threshold specification applies to a rising edge of a noninverting input) of a falling edge on the noninverting input of the
comparator; refer to Figure 1.
(2) Specified by design.
(3) V refers to the differential voltage at the comparator inputs.
ID
(4) Open-drain output can be pulled to the range of +2.7V to +18V, regardless of VS.
(5) The comparator response time specified is the interval between the input step function and the instant when the output crosses 1.4V.
(6) The RESET input has an internal 2MΩ (typical) pull-down. Leaving RESET open results in a LOW state, with transparent comparator operation.
VTHRESHOLD
0.592V 0.6V
Input Voltage
Hysteresis = VTHRESHOLD − 8mV
Figure 1. Typical Comparator Hysteresis
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ELECTRICAL CHARACTERISTICS: GENERAL
Boldface limits apply over the specified temperature range: TA = −40°C to +125°C.
At TA = +25°C, VS = +12V, VCM = +12V, VSENSE = 100mV, RL = 10kΩ to GND, RPULL-UP = 5.1kΩ connected from CMPOUT to VS, and CMPIN = 1V,
unless otherwise noted.
INA200, INA201, INA202
GENERAL PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNITS
1350
+18
1800
1850
V
µA
µA
V
+125
+150
+150
°C
°C
°C
POWER SUPPLY
Operating Power Supply
Quiescent Current
Over Temperature
Comparator Power-On Reset Threshold(1)
TEMPERATURE
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Resistance
MSOP-8 Surface-Mount
SO-8
VS
IQ
+2.7
VOUT = 2V
VSENSE = 0mV
1.5
−40
−55
−65
qJA
200
150
°C/W
°C/W
(1) The INA200, INA201, and INA202 are designed to power-up with the comparator in a defined reset state as long as RESET is open or grounded. The comparator
is in reset as long as the power supply is below the voltage shown here. The comparator assumes a state based on the comparator input above this supply voltage.
If RESET is high at power-up, the comparator output comes up high and requires a reset to assume a low state, if appropriate.
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TYPICAL CHARACTERISTICS
At TA = +25°C, VS = +12V, VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
GAIN vs FREQUENCY
GAIN vs FREQUENCY
45
45
CLOAD = 1000pF
G = 100
G = 50
30
G = 50
35
Gain (dB)
Gain (dB)
35
G = 100
40
40
G = 20
25
20
30
G = 20
25
20
15
15
10
10
5
5
10k
100k
10k
1M
100k
COMMON−MODE AND POWER−SUPPLY REJECTION
vs FREQUENCY
GAIN PLOT
20
140
18
130
Common−Mode and
Power−Supply Rejection (dB)
100V/V
16
VOUT (V)
14
50V/V
12
10
8
20V/V
6
4
2
120
CMR
110
100
90
PSR
80
70
60
50
40
0
20
100
200
300
400
500
600
700
800
900
10
100
1k
VDIFFERENTIAL (mV)
100k
OUTPUT ERROR vs COMMON−MODE VOLTAGE
4.0
0.1
3.5
0.09
0.08
3.0
Output Error (% )
Output Error
(% error of the ideal output value)
10k
Frequency (Hz)
OUTPUT ERROR vs VSENSE
2.5
2.0
1.5
1.0
0.07
0.06
0.05
0.04
0.03
0.02
0.5
0.01
0
0
0
50
100 150
200
250 300
VSENSE (mV)
6
1M
Frequency (Hz)
Frequency (Hz)
350
400
450 500
−16 −12 −8 −4
0
4
8
12 16 20
Common−Mode Voltage (V)
...
76 80
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TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = +12V, VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
POSITIVE OUTPUT VOLTAGE SWING
vs OUTPUT CURRENT
QUIESCENT CURRENT vs OUTPUT VOLTAGE
3.5
12
VS = 12V
10
9
3.0
Sourcing Current
2.5
+25_C
8
−40_C
+125_ C
7
6
I Q (mA)
Output Voltage (V)
11
VS = 3V
5
Sourcing Current
+25_C
4
−40_C
Output stage is designed
to source current. Current
sinking
capability
is
approximately 400µA.
3
2
1
0
+125_ C
0
2.0
1.5
1.0
0.5
0
5
10
20
15
25
30
0
1
2
Output Current (mA)
6
7
34
Output Short−Circuit Current (mA)
1.75
VS = 2.7V
VS = 12V
1.50
1.25
VS = 12V
1.00
VS = 2.7V
VSENSE = 0mV
0.75
8
9
10
−40_C
30
+25_ C
26
+125_ C
22
18
14
10
6
0
4
8
12 16 20 24 28 32 36
2.5 3.5
VCM (V)
4.5
5.5 6.5
7.5
8.5
9.5 10.5 11.5 17
18
Supply Voltage (V)
STEP RESPONSE
STEP RESPONSE
G = 20
Output Voltage (500mV/div)
G = 20
Output Voltage (50mV/div)
IQ (mA)
5
OUTPUT SHORT−CIRCUIT CURRENT
vs SUPPLY VOLTAGE
VSENSE = 100mV
0.50
−16 −12 −8 −4
4
Output Voltage (V)
QUIESCENT CURRENT
vs COMMON−MODE VOLTAGE
2.00
3
VSENSE = 10mV to 20mV
Time (2µs/div)
VSENSE = 10mV to 100mV
Time (2µs/div)
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TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = +12V, VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
STEP RESPONSE
STEP RESPONSE
G = 50
Output Voltage (50mV/div)
Output Voltage (100mV/div)
G = 20
VSENSE = 10mV to 20mV
VSENSE = 90mV to 100mV
Time (2µs/div)
Time (5µs/div)
STEP RESPONSE
STEP RESPONSE
G = 50
Output Voltage (1V/div)
Output Voltage (100mV/div)
G = 50
VSENSE = 10mV to 100mV
VSENSE = 90mV to 100mV
Time (5µs/div)
Time (5µs/div)
COMPARATOR VOL vs ISINK
STEP RESPONSE
600
G = 100
Output Voltage (2V/div)
500
VOL (mV)
400
300
200
100
VSENSE = 10mV to 100mV
Time (10µs/div)
0
0
1
2
3
ISINK (mA)
8
4
5
6
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TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = +12V, VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
COMPARATOR TRIP POINT vs TEMPERATURE
COMPARATOR TRIP POINT vs SUPPLY VOLTAGE
602
600
Comparator Trip Point (mV)
599
Reset Voltage (mV)
598
597
596
595
594
593
592
601
600
599
598
597
591
596
590
4
6
8
10
12
14
16
−50
18
−25
0
25
50
75
Supply Voltage (V)
Temperature (_C)
COMPARATOR PROPAGATION DELAY
vs OVERDRIVE VOLTAGE
COMPARATOR RESET VOLTAGE vs
SUPPLY VOLTAGE
200
1.2
175
1.0
Reset Voltage (V)
Propagation Delay (ns)
2
150
125
100
100
125
0.8
0.6
0.4
0.2
75
0
50
0
20
40
60
80
100 120 140 160 180
2
200
4
6
8
10
12
14
Overdrive Voltage (mV)
Supply Voltage (V)
COMPARATOR PROPAGATION DELAY vs
TEMPERATURE
COMPARATOR PROPAGATION DELAY
16
18
300
Propagation Delay (ns)
275
Input
200mV/div
250
225
200
Output
2V/div
175
150
VOD = 5mV
125
−50
−25
0
25
50
75
100
125
2µs/div
Temperature (_C)
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the supply voltage, VS. VCM is expressed as (VIN+ + VIN−)/2;
however, in practice, VCM is seen as the voltage at VIN+
because the voltage drop across VSENSE is usually small.
APPLICATIONS INFORMATION
BASIC CONNECTIONS
Figure 2 shows the basic connections of the INA200,
INA201, and INA202. The input pins, VIN+ and VIN−, should
be connected as closely as possible to the shunt resistor
to minimize any resistance in series with the shunt
resistance.
Power-supply bypass capacitors are required for stability.
Applications with noisy or high-impedance power supplies
may require additional decoupling capacitors to reject
power-supply noise. Connect bypass capacitors close to
the device pins.
POWER SUPPLY
The input circuitry of the INA200, INA201, and INA202 can
accurately measure beyond the power-supply voltage, V+.
For example, the V+ power supply can be 5V, whereas the
load power-supply voltage is up to +80V. The output
voltage range of the OUT terminal, however, is limited by
the voltages on the power-supply pin.
This section addresses the accuracy of these specific
operating regions:
Normal Case 1: VSENSE ≥ 20mV, VCM ≥ VS
Normal Case 2: VSENSE ≥ 20mV, VCM < VS
Low VSENSE Case 1: VSENSE < 20mV, −16V ≤ VCM < 0
Low VSENSE Case 2: VSENSE < 20mV, 0V ≤ VCM ≤ VS
Low VSENSE Case 3: VSENSE < 20mV, VS < VCM ≤ 80V
Normal Case 1: VSENSE ≥ 20mV, VCM ≥ VS
This region of operation provides the highest accuracy.
Here, the input offset voltage is characterized and
measured using a two-step method. First, the gain is
determined by Equation 1.
G+
V OUT1 * V OUT2
100mV * 20mV
(1)
where:
VOUT1 = Output Voltage with VSENSE = 100mV
VOUT2 = Output Voltage with VSENSE = 20mV
Then the offset voltage is measured at VSENSE = 100mV
and referred to the input (RTI) of the current shunt monitor,
as shown in Equation 2.
ACCURACY VARIATIONS AS A RESULT OF
VSENSE AND COMMON-MODE VOLTAGE
The accuracy of the INA200, INA201, and INA202 current
shunt monitors is a function of two main variables: VSENSE
(VIN+ − VIN−) and common-mode voltage, VCM, relative to
VOSRTI (Referred−To−Input) +
ǒV G Ǔ * 100mV
OUT1
RSHUNT
3mΩ
Load Supply
−18V to +80V
Load
5V Supply
INA200
(G = 20)
1
V+
2 OUT
CBYPASS
0.01µF
G
VIN+
8
VIN−
7
CMPOUT
6
RESET
5
RPULL−UP
4.7kΩ
0.6V
Reference
R1
3 CMPIN
Comparator
R2
4
GND
Transparent/Reset
Latch
Figure 2. INA200 Basic Connections
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Normal Case 2: VSENSE ≥ 20mV, VCM < VS
This region of operation has slightly less accuracy than
Normal Case 1 as a result of the common-mode operating
area in which the part functions, as seen in the Output Error
vs Common-Mode Voltage curve. As noted, for this graph
VS = 12V; for VCM < 12V, the Output Error increases as VCM
becomes less than 12V, with a typical maximum error of
0.005% at the most negative VCM = −16V.
Low VSENSE Case 1:
VSENSE < 20mV, −16V ≤ VCM < 0; and
Low VSENSE Case 3:
VSENSE < 20mV, VS < VCM ≤ 80V
Although the INA200 family of devices are not designed for
accurate operation in either of these regions, some
applications are exposed to these conditions. For
example, when monitoring power supplies that are
switched on and off while VS is still applied to the INA200,
INA201, or INA202, it is important to know what the
behavior of the devices will be in these regions.
As VSENSE approaches 0mV, in these VCM regions, the
device output accuracy degrades. A larger-than-normal
offset can appear at the current shunt monitor output with
a typical maximum value of VOUT = 300mV for
VSENSE = 0mV. As VSENSE approaches 20mV, VOUT
returns to the expected output value with accuracy as
specified in the Electrical Characteristics. Figure 3
illustrates this effect using the INA202 (Gain = 100).
2.4
INA202 VOUT Tested Limit(1)
2.2
VCM1
2.0
Ideal
1.8
VCM2
1.6
1.4
VCM3
1.2
1.0
VOUT tested limit at
0.8
VCM4
VSENSE = 0mV, 0 ≤ VCM1 ≤ VS.
0.6
VCM2, VCM3, and VCM4 illustrate the variance
0.4
from part to part of the VCM that can cause
0.2
maximum VOUT with VSENSE < 20mV.
0
0
2
4
6
8 10 12 14 16 18 20 22 24
VSENSE (mV)
NOTE: (1) INA200 VOUT Tested Limit = 0.4V. INA201 VOUT Tested Limit = 1V.
Figure 4. Example for Low VSENSE Case 2
(INA202, Gain = 100)
SELECTING RS
2.0
The value chosen for the shunt resistor, RS, depends on
the application and is a compromise between small-signal
accuracy and maximum permissible voltage loss in the
measurement line. High values of RS provide better
accuracy at lower currents by minimizing the effects of
offset, while low values of RS minimize voltage loss in the
supply line. For most applications, best performance is
attained with an RS value that provides a full-scale shunt
voltage range of 50mV to 100mV. Maximum input voltage
for accurate measurements is 500mV.
1.8
1.6
1.4
VOUT (V)
parallel. One op amp front end operates in the positive
input common-mode voltage range, and the other in the
negative input region. For this case, neither of these two
internal amplifiers dominates and overall loop gain is very
low. Within this region, VOUT approaches voltages close to
linear operation levels for Normal Case 2. This deviation
from linear operation becomes greatest the closer VSENSE
approaches 0V. Within this region, as VSENSE approaches
20mV, device operation is closer to that described by
Normal Case 2. Figure 4 illustrates this behavior for the
INA202. The VOUT maximum peak for this case is tested
by maintaining a constant VS, setting VSENSE = 0mV and
sweeping VCM from 0V to VS. The exact VCM at which VOUT
peaks during this test varies from part to part, but the VOUT
maximum peak is tested to be less than the specified VOUT
tested limit.
VOUT (V)
In the Typical Characteristics, the Output Error vs
Common-Mode Voltage curve shows the highest
accuracy for the this region of operation. In this plot,
VS = 12V; for VCM ≥ 12V, the output error is at its minimum.
This case is also used to create the VSENSE ≥ 20mV output
specifications in the Electrical Characteristics table.
1.2
Actual
1.0
0.8
Ideal
0.6
0.4
0.2
0
0
2
4
6
8
10
12
14
16
18
20
VSENSE (mV)
Figure 3. Example for Low VSENSE Cases 1 and 3
(INA202, Gain = 100)
Low VSENSE Case 2: VSENSE < 20mV, 0V ≤ VCM ≤ VS
This region of operation is the least accurate for the
INA200 family. To achieve the wide input common-mode
voltage range, these devices use two op amp front ends in
TRANSIENT PROTECTION
The −16V to +80V common-mode range of the INA200,
INA201, and INA202 is ideal for withstanding automotive
fault conditions ranging from 12V battery reversal up to
+80V transients, since no additional protective
components are needed up to those levels. In the event
that the INA200, INA201, and INA202 are exposed to
transients on the inputs in excess of their ratings, then
external transient absorption with semiconductor transient
absorbers (such as zeners) will be necessary. Use of
11
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SBOS374 − NOVEMBER 2006
MOVs or VDRs is not recommended except when they are
used in addition to a semiconductor transient absorber.
Select the transient absorber such that it will never allow
the INA200, INA201, and INA202 to be exposed to
transients greater than +80V (that is, allow for transient
absorber tolerance, as well as additional voltage due to
transient absorber dynamic impedance). Despite the use
of internal zener-type ESD protection, the INA200,
INA201, and INA202 do not lend themselves to using
external resistors in series with the inputs since the internal
gain resistors can vary up to ±30%. (If gain accuracy is not
important, then resistors can be added in series with the
INA200, INA201, and INA202 inputs with two equal
resistors on each input.)
INA201, and INA202, which is complicated by the internal
5kΩ + 30% input impedance; this is shown in Figure 5.
Using the lowest possible resistor values minimizes both
the initial shift in gain and effects of tolerance. The effect
on initial gain is given by Equation 3:
ǒ
Gain Error % + 100 * 100
Ǔ
5kW
5kW ) R FILT
(3)
OUTPUT VOLTAGE RANGE
Total effect on gain error can be calculated by replacing the
5kΩ term with 5kΩ − 30%, (or 3.5kΩ) or 5kΩ + 30% (or
6.5kΩ). The tolerance extremes of RFILT can also be
inserted into the equation. If a pair of 100. 1% resistors are
used on the inputs, the initial gain error will be 1.96%.
Worst-case tolerance conditions will always occur at the
lower excursion of the internal 5kΩ resistor (3.5kΩ), and
the higher excursion of RFILT − 3% in this case.
The output of the INA200, INA201, and INA202 is accurate
within the output voltage swing range set by the power
supply pin, V+. This performance is best illustrated when
using the INA202 (a gain of 100 version), where a 100mV
full-scale input from the shunt resistor requires an output
voltage swing of +10V, and a power-supply voltage
sufficient to achieve +10V on the output.
Note that the specified accuracy of the INA200, INA201,
and INA202 must then be combined in addition to these
tolerances. While this discussion treated accuracy
worst-case conditions by combining the extremes of the
resistor values, it is appropriate to use geometric mean or
root sum square calculations to total the effects of
accuracy variations.
INPUT FILTERING
COMPARATOR
An obvious and straightforward location for filtering is at
the output of the INA200, INA201, and INA202 series;
however, this location negates the advantage of the low
output impedance of the internal buffer. The only other
option for filtering is at the input pins of the INA200,
The INA200, INA201, and INA202 devices incorporate an
open-drain comparator. This comparator typically has
2mV of offset and a 1.3µs (typical) response time. The
output of the comparator latches and is reset through the
RESET pin, see Figure 6.
RSHUNT << RFILTER
3mΩ
VSUPPLY
Load
RFILTER < 100Ω
INA200− INA202
RFILTER <100Ω
CFILTER
VIN+
V+
1
OUT
2
CMPIN
3
8
VIN−
G
0.6V
Reference
7
f−3dB
6
CMPOUT
f−3dB =
GND
4
Comparator
5
1
2π(2RFILTER)CFILTER
RESET
SO−14, TSSOP−14
Figure 5. Input Filter (Gain Error — 1.5% to −2.2%)
12
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"##
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SBOS374 − NOVEMBER 2006
0.6V
VIN
0V
CMPOUT
RESET
Figure 6. Comparator Latching Capability
Shunt
Option 1
Shunt
Option 2
Supply
R3
To VIN+
To VIN−
To VIN−
To VIN+
4.5V to 5.5V
R4
Q1
2N3904
Load
1
V+
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
To VIN+
VIN+
8
VIN−
7
CMPOUT
6
RESET
5
2 OUT
G
From
Shunt Option
1, 2, or 3
Shunt
Option 3
To VIN−
0.6V
Reference
R1
3 CMPIN
Comparator
R2
4
GND
RESET
NOTE: Q1 cascodes the comparator output to drive a high−side FET (the 2N3904 shown is good up to 60V). The shunt could be located in
any one of the three locations shown. The latching capability should be used in shutdown applications to prevent oscillation at the trip point.
Figure 7. High-Side Switch Over-Current Shutdown
13
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SBOS374 − NOVEMBER 2006
Shunt
Option 1
Supply
To VIN+
4.5V to 5.5V
To VIN−
Load
To VIN+
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
V+
2 OUT
G
R4
2.2kΩ
VIN+
8
VIN−
7
From
Shunt Option
1, 2, or 3
To VIN+
Shunt
Option 3
3 CMPIN
CMPOUT
6
RESET
5
Comparator
R2
4
GND
Q1
2N3904
RESET
NOTE: In this case, Q1 is used to invert the comparator output.
Figure 8. Low-Side Switch Over-Current Shutdown
14
To VIN−
R1
22kΩ
0.6V
Reference
R1
Shunt
Option 2
To VIN−
www.ti.com
"##
"#$
"#"
SBOS374 − NOVEMBER 2006
RSHUNT
Supply
4.5V to 5.5V
1
V+
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
2 OUT
G
VIN+
8
VIN−
7
CMPOUT
6
RESET
5
R5
2.2kΩ
0.6V
Reference
R1
3 CMPIN
Comparator
R2
4
RESET
GND
1
V+
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
2 OUT
G
R6
2.2kΩ
VIN+
8
VIN−
7
CMPOUT
6
RESET
5
0.6V
Reference
R3
3 CMPIN
Comparator
R4
4
GND
CMPOUT
RESET
R7
200kΩ
NOTE: It is possible to set different limits for each direction.
Figure 9. Bidirectional Over-Current Comparator
15
PACKAGE OPTION ADDENDUM
www.ti.com
11-Dec-2006
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
INA200AIDGKR
ACTIVE
MSOP
DGK
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA200AIDGKRG4
ACTIVE
MSOP
DGK
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA200AIDGKT
ACTIVE
MSOP
DGK
8
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA200AIDGKTG4
ACTIVE
MSOP
DGK
8
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA201AIDGKR
ACTIVE
MSOP
DGK
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA201AIDGKRG4
ACTIVE
MSOP
DGK
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA201AIDGKT
ACTIVE
MSOP
DGK
8
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA201AIDGKTG4
ACTIVE
MSOP
DGK
8
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA202AIDGKR
ACTIVE
MSOP
DGK
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA202AIDGKRG4
ACTIVE
MSOP
DGK
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA202AIDGKT
ACTIVE
MSOP
DGK
8
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
INA202AIDGKTG4
ACTIVE
MSOP
DGK
8
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
Lead/Ball Finish
MSL Peak Temp (3)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
11-Dec-2006
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 2
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