INA201AIDGKTG4 [TI]
High-Side Measurement Current-Shunt Monitor With Open-Drain Comparator and Reference;
| 型号： | INA201AIDGKTG4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | High-Side Measurement Current-Shunt Monitor With Open-Drain Comparator and Reference 放大器 光电二极管 |
| 文件： | 总21页 (文件大小：703K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INA200-Q1
INA201-Q1
INA202-Q1
www.ti.com
SBOS558 –APRIL 2011
High-Side Measurement Current-Shunt Monitor
with Open-Drain Comparator and Reference
Check for Samples: INA200-Q1, INA201-Q1, INA202-Q1
1
FEATURES
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
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.
High Accuracy: 3.5% Max Error Over
Temperature
The INA200-Q1, INA201-Q1, and INA202-Q1 also
incorporate an open-drain comparator and internal
•
•
•
•
Bandwidth: 500 kHz (INA200-Q1)
Quiescent Current: 1800 μA (Max)
Latch-Up Exceeds 100mA per JESD78 - Class I
Package: MSOP-8
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
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
2
V+
VIN+
8
7
OUT
G
VIN-
0.6V
Reference
CMPIN
3
CMPOUT
RESET
6
5
Comparator
4
GND
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
PACKAGE
ORDERABLE PART NUMBER
TOP-SIDE MARKING
Product Preview
INA200AQDGKRQ1
-40°C to 125°C
MSOP - DGK
Reel of 2500
INA201AQDGKRQ1
QWV
INA202AQDGKRQ1
Product Preview
(1) 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
Supply Voltage, V+
18
V
Current-Shunt Monitor Analog Inputs, VIN+, VIN–
Differential (VIN+) – (VIN–
Common Mode(2)
)
–18 to +18
–16 to +80
V
V
Comparator Analog Input and Reset Pins(2)
Analog Output, Out(2)
Comparator Output, Out Pin(2)
Input Current Into Any Pin(2)
Storage Temperature
GND – 0.3 to (V+) + 0.3
GND – 0.3 to (V+) + 0.3
GND – 0.3 to 18
5
V
V
V
mA
°C
°C
–65 to +150
Junction Temperature
+150
(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.
(2) This voltage may exceed the ratings shown if the current at that pin is limited to 5mA.
Figure 1. PIN CONFIGURATIONS
INA200-INA202
VIN+
V+
OUT
1
2
3
4
8
7
6
5
VIN-
CMPOUT
RESET
CMPIN
GND
MSOP-8 (DGK),
SO-8 (D)
2
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INA200-Q1
INA201-Q1
INA202-Q1
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SBOS558 –APRIL 2011
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
INPUT
CONDITIONS
MIN
TYP
MAX
UNIT
Full-Scale Sense Input Voltage
Common-Mode Input Range
Common-Mode Rejection
Over Temperature
Offset Voltage, RTI(1)
+25°C to +125°C
VSENSE
VCM
VSENSE = VIN+ – VIN–
0.15
(VS – 0.25)/Gain
V
V
–16
80
80
CMR
VIN+ = –16V to +80V
100
123
±0.5
dB
VIN+ = +12V to +80V
100
dB
VOS
±2.5
±3
mV
mV
mV
μV/°C
μV/V
μA
–40°C to +25°C
±3.5
vs Temperature
dVOS/dT
PSR
IB
TMIN to TMAX
5
vs Power Supply
Input Bias Current, VIN– Pin
OUTPUT (VSENSE ≥ 20mV)
Gain:
VOUT = 2V, VIN+ = +18V, 2.7V
2.5
±9
100
±16
G
INA200-Q1
20
50
V/V
V/V
V/V
%
INA201-Q1
INA202-Q1
100
±0.2
Gain Error
VSENSE = 20mV to 100mV
VSENSE = 20mV to 100mV
VSENSE = 120mV, VS = +16V
VSENSE = 120mV, VS = +16V
VSENSE = 20mV to 100mV
±1
±2
Over Temperature
Total Output Error(2)
Over Temperature
Nonlinearity Error(3)
Output Impedance
Maximum Capacitive Load
OUTPUT (VSENSE < 20mV)(4)
INA200-Q1, INA201-Q1, INA202-Q1
INA200-Q1
%
±0.75
±2.2
±3.5
%
%
±0.002
1.5
%
RO
Ω
No Sustained Oscillation
10
nF
–16V ≤ VCM < 0V
300
300
mV
V
0V ≤ VCM ≤ VS, VS = 5V
0V ≤ VCM ≤ VS, VS = 5V
0V ≤ VCM ≤ VS, VS = 5V
0.4
1
INA201-Q1
V
INA202-Q1
2
V
INA200-Q1, INA201-Q1, INA202-Q1
VOLTAGE OUTPUT(5)
Output Swing to the Positive Rail
Output Swing to GND(6)
FREQUENCY RESPONSE
Bandwidth:
VS < VCM ≤ 80V
mV
VIN– = 11V, VIN+ = 12V
(V+) – 0.15
(V+) – 0.25
V
V
VIN– = 0V, VIN+ = –0.5V
(VGND) + 0.004
(VGND) + 0.05
BW
SR
INA200-Q1
CLOAD = 5pF
CLOAD = 5pF
CLOAD = 5pF
500
300
200
40
kHz
kHz
INA201-Q1
INA202-Q1
kHz
Phase Margin
CLOAD < 10nF
Degrees
V/μs
Slew Rate
1
VSENSE = 10mVPP to 100mVPP
CLOAD = 5pF
,
Settling Time (1%)
2
μs
NOISE, RTI
Voltage Noise Density
40
nV/√Hz
(1) Offset is extrapolated from measurements of the output at 20mV and 100mV VSENSE
.
(2) Total output error includes effects of gain error and VOS
(3) Linearity is best fit to a straight line.
.
(4) For details on this region of operation, see the Accuracy Variations section in the Applications Information.
(5) See Typical Characteristic curve Output Swing vs Output Current.
(6) Specified by design.
Copyright © 2011, Texas Instruments Incorporated
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INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 –APRIL 2011
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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
OFFSET VOLTAGE
Threshold
Over Temperature
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNIT
590
608
620
mV
mV
mV
586
625
Hysteresis(1)
TA = –40°C to +85°C
–8
INPUT BIAS CURRENT(2)
CMPIN Pin
0.005
10
nA
vs Temperature
15
nA
INPUT VOLTAGE RANGE
0V to VS
1.5V
–
CMPIN Pin
V
OUTPUT (OPEN-DRAIN)
Large-Signal Differential Voltage Gain
CMP VOUT 1V to 4V,
L ≥ 15kΩ Connected to 5V
200
V/mV
R
(4)
High-Level Leakage Current(3)
Low-Level Output Voltage(3)
ILKG
VOL
VID = 0.4V, VOH = VS
0.0001
220
1
μA
VID = –0.6V, IOL = 2.35mA
300
mV
RESPONSE TIME
RL to 5V, CL = 15pF, 100mV Input Step with
5mV Overdrive
Response Time(5)
1.3
μs
RESET
RESET Threshold(6)
Logic Input Impedance
Minimum RESET Pulse Width
RESET Propagation Delay
1.1
2
V
MΩ
μs
1.5
3
μs
(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 2.
(2) Specified by design.
(3) VID refers to the differential voltage at the comparator inputs.
(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 2. Typical Comparator Hysteresis
4
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INA200-Q1
INA201-Q1
INA202-Q1
www.ti.com
SBOS558 –APRIL 2011
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
POWER SUPPLY
CONDITIONS
MIN
TYP
MAX
UNIT
Operating Power Supply
Quiescent Current
VS
+2.7
+18
1800
1850
V
μA
μA
V
IQ
VOUT = 2V
1350
1.5
Over Temperature
Comparator Power-On Reset Threshold(1)
VSENSE = 0mV
TEMPERATURE
Operating Temperature Range
Storage Temperature Range
–40
–65
+125
+150
°C
°C
Thermal Resistance
θJA
MSOP-8 Surface-Mount
200
°C/W
(1) 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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INA200-Q1
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INA202-Q1
SBOS558 –APRIL 2011
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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
40
35
30
25
20
15
10
5
CLOAD = 1000pF
G = 100
40
G = 100
G = 50
G = 50
35
30
G = 20
G = 20
25
20
15
10
5
10k
100k
1M
10k
100k
1M
Frequency (Hz)
Figure 3.
Frequency (Hz)
Figure 4.
COMMON-MODE AND POWER-SUPPLY REJECTION
vs FREQUENCY
GAIN PLOT
20
140
18
130
120
110
100
90
100V/V
16
14
12
10
8
CMR
50V/V
PSR
80
20V/V
70
6
60
4
50
2
40
0
20 100 200 300 400 500 600 700 800 900
10
100
1k
10k
100k
VDIFFERENTIAL (mV)
Frequency (Hz)
Figure 5.
Figure 6.
OUTPUT ERROR vs VSENSE
OUTPUT ERROR vs COMMON-MODE VOLTAGE
4.0
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
50
100 150 200
250 300
350 400 450
500
-8 -4
0
16 20
...
76
80
-16 -12
4
8
12
VSENSE (mV)
Common-Mode Voltage (V)
Figure 7.
Figure 8.
6
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INA201-Q1
INA202-Q1
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SBOS558 –APRIL 2011
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
3.0
2.5
2.0
1.5
1.0
0.5
0
12
11
10
9
VS = 12V
Sourcing Current
+25°C
8
-40°C
+125°C
7
6
VS = 3V
5
Sourcing Current
4
-40°C
+25°C
Output stage is designed
to source current. Current
sinking capability is
3
2
approximately 400mA.
1
+125°C
0
5
10
20
25
0
15
30
1
2
0
3
4
5
6
7
8
9
10
Output Current (mA)
Output Voltage (V)
Figure 9.
Figure 10.
QUIESCENT CURRENT
vs COMMON-MODE VOLTAGE
OUTPUT SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
2.00
1.75
1.50
1.25
1.00
0.75
0.50
34
30
26
22
18
14
10
6
VSENSE = 100mV
-40°C
+25°C
VS = 2.7V
VS = 12V
+125°C
VS = 12V
VS = 2.7V
VSENSE = 0mV
-8 -4
0
4
20 24 28 32
-16 -12
8
12 16
36
2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 17 18
VCM (V)
Supply Voltage (V)
Figure 11.
STEP RESPONSE
Figure 12.
STEP RESPONSE
G = 20
G = 20
VSENSE = 10mV to 20mV
Time (2ms/div)
VSENSE = 10mV to 100mV
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 = 20
G = 50
VSENSE = 90mV to 100mV
Time (2ms/div)
VSENSE = 10mV to 20mV
Time (5ms/div)
Figure 15.
Figure 16.
STEP RESPONSE
STEP RESPONSE
G = 50
G = 50
VSENSE = 10mV to 100mV
VSENSE = 90mV to 100mV
Time (5ms/div)
Time (5ms/div)
Figure 17.
Figure 18.
STEP RESPONSE
COMPARATOR VOL vs ISINK
600
500
400
300
200
100
0
G = 100
VSENSE = 10mV to 100mV
Time (10ms/div)
0
1
2
3
4
5
6
ISINK (mA)
Figure 20.
Figure 19.
8
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INA202-Q1
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SBOS558 –APRIL 2011
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
601
600
599
598
597
596
599
598
597
596
595
594
593
592
591
590
2
4
6
8
10
12
14
16
18
-50
-25
0
25
50
75
100
125
Supply Voltage (V)
Temperature (°C)
Figure 21.
Figure 22.
COMPARATOR PROPAGATION DELAY
vs OVERDRIVE VOLTAGE
COMPARATOR RESET VOLTAGE vs
SUPPLY VOLTAGE
200
175
150
125
100
75
1.2
1.0
0.8
0.6
0.4
0.2
0
50
0
20
40
60
80 100 120 140 160 180 200
2
4
6
8
10
12
14
16
18
Overdrive Voltage (mV)
Supply Voltage (V)
Figure 23.
Figure 24.
COMPARATOR PROPAGATION DELAY vs
TEMPERATURE
COMPARATOR PROPAGATION DELAY
300
275
250
225
200
175
150
125
Input
200mV/div
Output
2V/div
VOD = 5mV
2ms/div
-50
-25
0
25
50
75
100
125
Temperature (°C)
Figure 25.
Figure 26.
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APPLICATIONS INFORMATION
BASIC CONNECTIONS
ACCURACY VARIATIONS AS A RESULT OF
VSENSE AND COMMON-MODE VOLTAGE
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.
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.
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.
This section addresses the accuracy of these specific
operating regions:
POWER SUPPLY
•
•
•
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
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.
•
•
≤
Low VSENSE Case 3: VSENSE < 20mV, VS < VCM
80V
≤
RSHUNT
3mW
Load Supply
-18V to +80V
Load
5V Supply
INA200
1
2
(G = 20)
V+
RPULL-UP
4.7kW
VIN+
8
OUT
G
VIN-
7
CBYPASS
0.6V
Reference
R1
0.01mF
CMPIN
3
CMPOUT
RESET
6
5
Comparator
R2
4
GND
Latch
Transparent/Reset
Figure 27. INA200-Q1 Basic Connections
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SBOS558 –APRIL 2011
Normal Case 1: VSENSE ≥ 20mV, VCM ≥ VS
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).
This region of operation provides the highest
accuracy. Here, the input offset voltage is
characterized and measured using
method. First, the gain is determined by Equation 1.
OUT1 - VOUT2
a
two-step
V
G =
100mV - 20mV
(1)
2.0
1.8
1.6
1.4
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.
1.2
Actual
=
1.0
0.8
Ideal
0.6
0.4
0.2
0
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.
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
Normal Case 2: VSENSE ≥ 20mV, 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.
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:
V
< 20mV, –16V ≤ VCM < 0; and
SENSE
Low VSENSE Case 3:
V
SENSE
< 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.
As VSENSE approaches 0mV, in these VCM regions,
the
device
output
accuracy
degrades.
A
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INA201-Q1
INA202-Q1
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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.)
2.4
INA202 VOUT Tested Limit(1)
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
VCM1
Ideal
VCM2
VCM3
OUTPUT VOLTAGE RANGE
VOUT tested limit at
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.
VCM4
VSENSE = 0mV, 0 £ VCM1 £ VS
.
VCM2, VCM3, and VCM4 illustrate the variance
from part to part of the VCM that can cause
maximum VOUT with VSENSE < 20mV.
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.
INPUT FILTERING
Figure 29. Example for Low VSENSE Case 2
(INA202-Q1, Gain = 100)
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:
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.
5kW
Gain Error % = 100 - 100 ´
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.
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
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.
12
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Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1
INA201-Q1
INA202-Q1
www.ti.com
SBOS558 –APRIL 2011
RSHUNT << RFILTER
3mW
VSUPPLY
Load
RFILTER < 100W
RFILTER <100W
INA200-INA202
CFILTER
VIN+
V+
OUT
1
2
3
4
8
7
6
5
VIN-
G
0.6V
f
-3dB
Reference
CMPOUT
RESET
CMPIN
GND
1
f
=
-3dB
2p(2RFILTER)CFILTER
Comparator
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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Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 –APRIL 2011
www.ti.com
Shunt
Shunt
Option 1
Option 2
Supply
R3
To VIN+
To VIN-
To VIN+
To VIN-
4.5V to 5.5V
R4
Q1
2N3904
Load
INA200 (G = 20)
1
INA201 (G = 50)
INA202 (G = 100)
V+
To VIN+
Shunt
Option 3
VIN+
8
7
From
2
OUT
Shunt Option
1, 2, or 3
G
VIN-
To VIN-
0.6V
Reference
R1
3
CMPIN
GND
CMPOUT
RESET
6
5
Comparator
R2
4
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
14
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Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1
INA201-Q1
INA202-Q1
www.ti.com
SBOS558 –APRIL 2011
Shunt
Option 1
Supply
To VIN+
To VIN-
4.5V to 5.5V
Load
To VIN+
Shunt
Option 2
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
R4
2.2kW
1
To VIN-
V+
VIN+
8
7
R1
22kW
From
2
OUT
Shunt Option
1, 2, or 3
G
VIN-
0.6V
Reference
To VIN+
R1
Shunt
Option 3
3
CMPIN
GND
To VIN-
CMPOUT
RESET
6
5
Q1
2N3904
Comparator
R2
4
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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Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1
INA201-Q1
INA202-Q1
SBOS558 –APRIL 2011
www.ti.com
RSHUNT
Supply
4.5V to 5.5V
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
2
V+
R5
2.2kW
VIN+
8
7
OUT
G
VIN-
0.6V
Reference
R1
CMPIN
3
CMPOUT
RESET
6
5
Comparator
R2
4
RESET
GND
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
2
R6
2.2kW
V+
VIN+
8
7
OUT
G
VIN-
0.6V
Reference
R3
CMPIN
3
CMPOUT
RESET
6
5
Comparator
CMPOUT
R4
R7
200kW
4
RESET
GND
NOTE: It is possible to set different limits for each direction.
Figure 34. Bidirectional Over-Current Comparator
16
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Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1
PACKAGE OPTION ADDENDUM
www.ti.com
16-Aug-2012
PACKAGING INFORMATION
Status (1)
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
INA201AQDGKRQ1
ACTIVE
VSSOP
DGK
8
2500
Green (RoHS
& no Sb/Br)
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
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
INA201AQDGKRQ1
VSSOP
DGK
8
2500
330.0
12.4
5.3
3.4
1.4
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Aug-2012
*All dimensions are nominal
Device
Package Type Package Drawing Pins
VSSOP DGK
SPQ
Length (mm) Width (mm) Height (mm)
367.0 367.0 35.0
INA201AQDGKRQ1
8
2500
Pack Materials-Page 2
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