TI1 INA200AQDGKRQ1 High-side measurement current-shunt monitor with open-drain comparator and reference Datasheet

INA
200
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 – APRIL 2011
www.ti.com
High-Side Measurement Current-Shunt Monitor
with Open-Drain Comparator and Reference
Check for Samples: INA200-Q1, INA201-Q1, INA202-Q1
FEATURES
1
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DESCRIPTION
Qualified for Automotive Applications
Complete Current Sense Solution
0.6-V Internal Voltage Reference
Internal Open-Drain Comparator
Latching Capability on Comparator
Common-Mode Range: –16 V to 80 V
High Accuracy: 3.5% Max Error Over
Temperature
Bandwidth: 500 kHz (INA200-Q1)
Quiescent Current: 1800 μA (Max)
Latch-Up Exceeds 100mA per JESD78 - Class I
Package: MSOP-8
The INA200-Q1, INA201-Q1, and INA202-Q1 are
high-side current-shunt monitors with voltage output.
The INA200-Q1–INA202-Q1 can sense drops across
shunts at common-mode voltages from –16V to 80V.
The INA200-Q1–INA202-Q1 are available with three
output voltage scales: 20V/V, 50V/V, and 100V/V,
with up to 500kHz bandwidth.
The INA200-Q1, INA201-Q1, and INA202-Q1 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.
The INA200-Q1, INA201-Q1, and INA202-Q1 operate
from a single +2.7V to +18V supply, drawing a
maximum of 1800μA of supply current. Package
option include the very small MSOP-8. All versions
are specified over the extended operating
temperature range of –40°C to 125°C.
APPLICATIONS
•
•
•
Automotive
Power Management
Battery Chargers
1
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
V+
2 OUT
G
VIN+
8
VIN-
7
0.6V
Reference
3 CMPIN
Comparator
4
CMPOUT 6
GND
RESET 5
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 – APRIL 2011
www.ti.com
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.
ORDERING INFORMATION (1)
TA
-40°C to 125°C
(1)
PACKAGE
MSOP - DGK
ORDERABLE PART NUMBER
Reel of 2500
TOP-SIDE MARKING
INA200AQDGKRQ1
Product Preview
INA201AQDGKRQ1
QWV
INA202AQDGKRQ1
Product Preview
For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the
device product folder at www.ti.com.
ABSOLUTE MAXIMUM RATINGS (1)
VALUE
UNIT
18
V
Differential (VIN+) – (VIN–)
–18 to +18
V
Common Mode (2)
–16 to +80
V
GND – 0.3 to (V+) + 0.3
V
GND – 0.3 to (V+) + 0.3
V
GND – 0.3 to 18
V
Supply Voltage, V+
Current-Shunt Monitor Analog Inputs, VIN+, VIN–
Comparator Analog Input and Reset Pins
(2)
Analog Output, Out (2)
Comparator Output, Out Pin (2)
Input Current Into Any Pin
(2)
5
mA
Storage Temperature
–65 to +150
°C
Junction Temperature
+150
°C
(1)
(2)
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 voltage may exceed the ratings shown if the current at that pin is limited to 5mA.
Figure 1. PIN CONFIGURATIONS
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-Q1, INA201-Q1, INA202-Q1
CURRENT-SHUNT MONITOR PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNIT
0.15
(VS – 0.25)/Gain
V
INPUT
Full-Scale Sense Input Voltage
Common-Mode Input Range
Common-Mode Rejection
VSENSE
CMR
Over Temperature
Offset Voltage, RTI (1)
VSENSE = VIN+ – VIN–
–16
VCM
VIN+ = –16V to +80V
80
VIN+ = +12V to +80V
100
80
V
100
dB
123
dB
±2.5
mV
+25°C to +125°C
±3
mV
–40°C to +25°C
±3.5
vs Temperature
vs Power Supply
Input Bias Current, VIN– Pin
±0.5
VOS
dVOS/dT
PSR
mV
μV/°C
TMIN to TMAX
5
VOUT = 2V, VIN+ = +18V, 2.7V
2.5
100
μV/V
±9
±16
μA
IB
OUTPUT (VSENSE ≥ 20mV)
Gain:
G
INA200-Q1
20
V/V
INA201-Q1
50
V/V
INA202-Q1
100
Gain Error
Over Temperature
VSENSE = 20mV to 100mV
Total Output Error (2)
VSENSE = 120mV, VS = +16V
Over Temperature
±0.75
VSENSE = 120mV, VS = +16V
Nonlinearity Error (3)
Output Impedance
±0.2
VSENSE = 20mV to 100mV
VSENSE = 20mV to 100mV
%
±2
%
±2.2
%
±3.5
%
±0.002
%
1.5
Ω
No Sustained Oscillation
10
nF
–16V ≤ VCM < 0V
300
RO
Maximum Capacitive Load
V/V
±1
OUTPUT (VSENSE < 20mV) (4)
INA200-Q1, INA201-Q1, INA202-Q1
mV
INA200-Q1
0V ≤ VCM ≤ VS, VS = 5V
0.4
V
INA201-Q1
0V ≤ VCM ≤ VS, VS = 5V
1
V
INA202-Q1
0V ≤ VCM ≤ VS, VS = 5V
2
VS < VCM ≤ 80V
INA200-Q1, INA201-Q1, INA202-Q1
300
V
mV
VOLTAGE OUTPUT (5)
Output Swing to the Positive Rail
VIN– = 11V, VIN+ = 12V
(V+) – 0.15
(V+) – 0.25
V
Output Swing to GND (6)
VIN– = 0V, VIN+ = –0.5V
(VGND) + 0.004
(VGND) + 0.05
V
INA200-Q1
CLOAD = 5pF
500
kHz
INA201-Q1
CLOAD = 5pF
300
kHz
INA202-Q1
CLOAD = 5pF
200
kHz
Phase Margin
CLOAD < 10nF
40
Degrees
1
V/μs
2
μs
40
nV/√Hz
FREQUENCY RESPONSE
Bandwidth:
Slew Rate
BW
SR
VSENSE = 10mVPP to 100mVPP,
CLOAD = 5pF
Settling Time (1%)
NOISE, RTI
Voltage Noise Density
(1)
(2)
(3)
(4)
(5)
(6)
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 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-Q1, INA201-Q1, INA202-Q1
COMPARATOR PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNIT
TA = +25°C
590
608
620
mV
625
mV
OFFSET VOLTAGE
Threshold
Over Temperature
586
Hysteresis (1)
TA = –40°C to +85°C
–8
mV
INPUT BIAS CURRENT (2)
CMPIN Pin
0.005
vs Temperature
10
nA
15
nA
INPUT VOLTAGE RANGE
0V to VS –
1.5V
V
CMP VOUT 1V to 4V,
RL ≥ 15kΩ Connected to 5V
200
V/mV
ILKG
VID = 0.4V, VOH = VS
0.0001
1
μA
VOL
VID = –0.6V, IOL = 2.35mA
220
300
mV
RL to 5V, CL = 15pF, 100mV Input Step with
5mV Overdrive
1.3
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)
μs
RESET
RESET Threshold (6)
Logic Input Impedance
Minimum RESET Pulse Width
RESET Propagation Delay
(1)
(2)
(3)
(4)
(5)
(6)
1.1
V
2
MΩ
1.5
μs
3
μs
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 2.
Specified by design.
VID refers to the differential voltage at the comparator inputs.
Open-drain output can be pulled to the range of +2.7V to +18V, regardless of VS.
The comparator response time specified is the interval between the input step function and the instant when the output crosses 1.4V.
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 2. Typical Comparator Hysteresis
4
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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-Q1, INA201-Q1, INA202-Q1
GENERAL PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNIT
+18
V
1350
1800
μA
1850
μA
POWER SUPPLY
Operating Power Supply
VS
Quiescent Current
IQ
Over Temperature
Comparator Power-On Reset Threshold
+2.7
VOUT = 2V
VSENSE = 0mV
(1)
1.5
V
TEMPERATURE
Operating Temperature Range
–40
+125
°C
Storage Temperature Range
–65
+150
°C
Thermal Resistance
θJA
MSOP-8 Surface-Mount
(1)
200
°C/W
The INA200-Q1, INA201-Q1, and INA202-Q1 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
45
G = 20
25
20
30
G = 20
25
20
15
15
10
10
5
5
10k
100k
10k
1M
100k
Frequency (Hz)
Figure 3.
Figure 4.
GAIN PLOT
COMMON-MODE AND POWER-SUPPLY REJECTION
vs FREQUENCY
140
18
130
Common-Mode and
Power-Supply Rejection (dB)
100V/V
16
14
50V/V
12
10
8
20V/V
6
4
120
CMR
110
100
90
PSR
80
70
60
50
2
40
0
20
100
200
300
400
500
600
700
800
900
10
100
1k
10k
100k
Frequency (Hz)
Figure 5.
Figure 6.
OUTPUT ERROR vs VSENSE
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)
VDIFFERENTIAL (mV)
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
50
100 150
200
250 300
VSENSE (mV)
350 400 450 500
0
0
-16 -12 -8 -4
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4
8
12 16 20
...
76 80
Common-Mode Voltage (V)
Figure 7.
6
1M
Frequency (Hz)
20
VOUT (V)
G = 50
35
Gain (dB)
30
G = 100
40
G = 50
35
Gain (dB)
CLOAD = 1000pF
G = 100
40
GAIN vs FREQUENCY
45
Figure 8.
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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
11
VS = 12V
10
6
VS = 3V
5
Sourcing Current
+25°C
4
3
-40°C
Output stage is designed
to source current. Current
sinking capability is
approximately 400mA.
2
1
+125°C
0
0
2.0
1.5
1.0
0.5
0
5
10
20
15
25
30
0
1
2
3
4
5
7
9
10
9.5 10.5 11.5 17
18
6
8
Output Current (mA)
Output Voltage (V)
Figure 9.
Figure 10.
QUIESCENT CURRENT
vs COMMON-MODE VOLTAGE
OUTPUT SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
34
VSENSE = 100mV
1.75
VS = 2.7V
VS = 12V
1.50
IQ (mA)
IQ (mA)
-40°C
+125°C
7
2.00
2.5
+25°C
8
Output Short-Circuit Current (mA)
Output Voltage (V)
3.0
Sourcing Current
9
1.25
VS = 12V
1.00
VS = 2.7V
VSENSE = 0mV
0.75
0.50
-16 -12 -8 -4
-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
4.5
5.5 6.5
7.5
8.5
VCM (V)
Supply Voltage (V)
Figure 11.
Figure 12.
STEP RESPONSE
STEP RESPONSE
G = 20
Output Voltage (50mV/div)
Output Voltage (500mV/div)
G = 20
VSENSE = 10mV to 20mV
VSENSE = 10mV to 100mV
Time (2ms/div)
Time (2ms/div)
Figure 13.
Figure 14.
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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 = 90mV to 100mV
VSENSE = 10mV to 20mV
Time (2ms/div)
Time (5ms/div)
Figure 15.
Figure 16.
STEP RESPONSE
STEP RESPONSE
G = 50
Output Voltage (1V/div)
Output Voltage (100mV/div)
G = 50
VSENSE = 90mV to 100mV
VSENSE = 10mV to 100mV
Time (5ms/div)
Time (5ms/div)
Figure 17.
Figure 18.
STEP RESPONSE
COMPARATOR VOL vs ISINK
600
G = 100
Output Voltage (2V/div)
500
VOL (mV)
400
300
200
100
VSENSE = 10mV to 100mV
0
Time (10ms/div)
0
1
2
3
4
5
6
ISINK (mA)
Figure 19.
8
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Figure 20.
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INA201-Q1
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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 SUPPLY VOLTAGE
COMPARATOR TRIP POINT vs TEMPERATURE
600
602
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
18
-50
0
-25
25
50
75
100
Supply Voltage (V)
Temperature (°C)
Figure 21.
Figure 22.
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
75
125
0.8
0.6
0.4
0.2
50
0
0
20
40
60
80
100 120 140
160 180
200
2
4
6
8
10
12
14
16
Overdrive Voltage (mV)
Supply Voltage (V)
Figure 23.
Figure 24.
COMPARATOR PROPAGATION DELAY vs
TEMPERATURE
COMPARATOR PROPAGATION DELAY
18
300
Propagation Delay (ns)
275
Input
200mV/div
250
225
200
Output
2V/div
175
150
125
-50
VOD = 5mV
-25
0
25
50
75
100
2ms/div
125
Temperature (°C)
Figure 25.
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Figure 26.
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APPLICATIONS INFORMATION
BASIC CONNECTIONS
Figure 27 shows the basic connections of the
INA200-Q1, INA201-Q1, and INA202-Q1. 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-Q1, INA201-Q1, and
INA202-Q1 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.
ACCURACY VARIATIONS AS A RESULT OF
VSENSE AND COMMON-MODE VOLTAGE
The accuracy of the INA200-Q1, INA201-Q1, and
INA202-Q1 current shunt monitors is a function of two
main variables: VSENSE (VIN+ – VIN–) and
common-mode voltage, VCM, relative to 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.
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
RSHUNT
3mW
Load Supply
-18V to +80V
Load
5V Supply
INA200
(G = 20)
1
V+
2 OUT
CBYPASS
0.01mF
G
VIN+
8
VIN-
7
CMPOUT
6
RESET
5
RPULL-UP
4.7kW
0.6V
Reference
R1
3 CMPIN
Comparator
R2
4
GND
Transparent/Reset
Latch
Figure 27. INA200-Q1 Basic Connections
10
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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.
VOUT1 - VOUT2
G=
100mV - 20mV
(1)
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 28 illustrates this
effect using the INA202-Q1 (Gain = 100).
2.0
where:
1.8
1.6
VOUT2 = Output Voltage with VSENSE = 20mV
1.4
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.
VOUT1
VOSRTI (Referred-To-Input) =
- 100mV
G
(2)
In the Typical Characteristics, the Output Error vs
Common-Mode Voltage curve (Figure 8) 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.
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
(Figure 8). 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-Q1 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-Q1, INA201-Q1, or INA202-Q1,
it is important to know what the behavior of the
devices will be in these regions.
VOUT (V)
VOUT1 = Output Voltage with VSENSE = 100mV
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 28. Example for Low VSENSE Cases 1 and 3
(INA202-Q1, Gain = 100)
Low VSENSE Case 2: VSENSE < 20mV, 0V ≤ VCM ≤ VS
This region of operation is the least accurate for the
INA200-Q1 family. To achieve the wide input
common-mode voltage range, these devices use two
op amp front ends in 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 29 illustrates this
behavior for the INA202-Q1. 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.
As VSENSE approaches 0mV, in these VCM regions,
the
device
output
accuracy
degrades.
A
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2.4
2.2 INA202 VOUT Tested Limit
VCM1
2.0
Ideal
1.8
VCM2
1.6
VOUT (V)
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-Q1, INA201-Q1, and INA202-Q1
inputs with two equal resistors on each input.)
(1)
1.4
VCM3
1.2
OUTPUT VOLTAGE RANGE
1.0
0.8
VOUT tested limit at
VSENSE = 0mV, 0 £ VCM1 £ VS.
VCM4
0.6
VCM2, VCM3, and VCM4 illustrate the variance
from part to part of the VCM that can cause
maximum VOUT with VSENSE < 20mV.
0.4
0.2
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 29. Example for Low VSENSE Case 2
(INA202-Q1, Gain = 100)
SELECTING RS
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.
TRANSIENT PROTECTION
The –16V to +80V common-mode range of the
INA200-Q1, INA201-Q1, and INA202-Q1 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-Q1,
INA201-Q1, and INA202-Q1 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 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-Q1, INA201-Q1, and INA202-Q1 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-Q1, INA201-Q1, and
INA202-Q1 do not lend themselves to using external
12
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The output of the INA200-Q1, INA201-Q1, and
INA202-Q1 is accurate within the output voltage
swing range set by the power supply pin, V+. This
performance is best illustrated when using the
INA202-Q1 (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.
INPUT FILTERING
An obvious and straightforward location for filtering is
at the output of the INA200-Q1, INA201-Q1, and
INA202-Q1 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-Q1, INA201-Q1, and INA202-Q1,
which is complicated by the internal 5kΩ + 30% input
impedance; this is illustrated in Figure 30. 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:
Gain Error % = 100 - 100 ´
5kW
5kW + RFILT
(3)
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 100Ω 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.
Note that the specified accuracy of the INA200-Q1,
INA201-Q1, and INA202-Q1 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.
COMPARATOR
The INA200-Q1, INA201-Q1, and INA202-Q1 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 31.
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 – APRIL 2011
www.ti.com
RSHUNT << RFILTER
3mW
VSUPPLY
Load
RFILTER < 100W
INA200-INA202
V+
1
OUT
2
CMPIN
3
GND
4
CFILTER
8
G
0.6V
Reference
RFILTER <100W
VIN+
VIN7
f-3dB
6
CMPOUT
f-3dB =
Comparator
5
1
2p(2RFILTER)CFILTER
RESET
SO-14, TSSOP-14
Figure 30. Input Filter (Gain Error—1.5% to –2.2%)
0.6V
VIN
0V
CMPOUT
RESET
Figure 31. Comparator Latching Capability
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13
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INA201-Q1
INA202-Q1
SBOS558 – APRIL 2011
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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
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
V+
To VIN+
2 OUT
G
VIN+
8
VIN-
7
CMPOUT
6
RESET
5
Shunt
Option 3
From
Shunt Option
1, 2, or 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 32. High-Side Switch Over-Current Shutdown
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Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 – APRIL 2011
www.ti.com
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
2.2kW
VIN+
8
VIN-
7
From
Shunt Option
1, 2, or 3
To VIN-
R1
22kW
0.6V
Reference
R1
Shunt
Option 2
To VIN+
Shunt
Option 3
3 CMPIN
Comparator
R2
4
GND
CMPOUT
6
RESET
5
Q1
2N3904
To VIN-
RESET
NOTE: In this case, Q1 is used to invert the comparator output.
Figure 33. Low-Side Switch Over-Current Shutdown
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15
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 – APRIL 2011
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RSHUNT
Supply
4.5V to 5.5V
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
V+
2 OUT
G
VIN+
8
VIN-
7
CMPOUT
6
RESET
5
R5
2.2kW
0.6V
Reference
R1
3 CMPIN
Comparator
R2
4
GND
RESET
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
V+
2 OUT
G
R6
2.2kW
VIN+
8
VIN-
7
CMPOUT
6
RESET
5
0.6V
Reference
R3
3 CMPIN
Comparator
R4
4
GND
CMPOUT
R7
200kW
RESET
NOTE: It is possible to set different limits for each direction.
Figure 34. Bidirectional Over-Current Comparator
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PACKAGE OPTION ADDENDUM
www.ti.com
16-Aug-2012
PACKAGING INFORMATION
Orderable Device
INA201AQDGKRQ1
Status
(1)
Package Type Package
Drawing
ACTIVE
VSSOP
DGK
Pins
Package Qty
8
2500
Eco Plan
(2)
Green (RoHS
& no Sb/Br)
Lead/
Ball Finish
MSL Peak Temp
(3)
Samples
(Requires Login)
CU NIPDAU Level-2-260C-1 YEAR
(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.
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.
OTHER QUALIFIED VERSIONS OF INA201-Q1 :
• Catalog: INA201
NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Aug-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
INA201AQDGKRQ1
Package Package Pins
Type Drawing
VSSOP
DGK
8
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
2500
330.0
12.4
Pack Materials-Page 1
5.3
B0
(mm)
K0
(mm)
P1
(mm)
3.4
1.4
8.0
W
Pin1
(mm) Quadrant
12.0
Q1
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Aug-2012
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
INA201AQDGKRQ1
VSSOP
DGK
8
2500
367.0
367.0
35.0
Pack Materials-Page 2
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