INA201AIDGKRG4 [BB]
High-Side Measurement Current-Shunt Monitor with Comparator and Reference; 高侧测量电流并联监视器与比较器和参考
| 型号： | INA201AIDGKRG4 |
| 厂家： | 
BURR-BROWN CORPORATION |
| 描述： | High-Side Measurement Current-Shunt Monitor with Comparator and Reference |
| 文件： | 总19页 (文件大小：286K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INA200
INA201
IN
A
2
0
0
INA202
SBOS374 − NOVEMBER 2006
High-Side Measurement Current-Shunt Monitor
with Comparator and Reference
FD EATURES
DESCRIPTION
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.
COMPLETE CURRENT SENSE SOLUTION
0.6V INTERNAL VOLTAGE REFERENCE
INTERNAL OPEN-DRAIN COMPARATOR
LATCHING CAPABILITY ON COMPARATOR
COMMON-MODE RANGE: −16V to +80V
D
D
D
D
D
HIGH ACCURACY: 3.5% MAX ERROR OVER
TEMPERATURE
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.
D
D
D
BANDWIDTH: 500kHz (INA200)
QUIESCENT CURRENT: 1800µA (max)
PACKAGES: SO-8, MSOP-8
AD PPLICATIONS
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
D
D
D
D
D
D
CELL PHONES
TELECOM EQUIPMENT
AUTOMOTIVE
POWER MANAGEMENT
BATTERY CHARGERS
WELDING EQUIPMENT
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
2
V+
VIN+
8
7
OUT
G
VIN
−
0.6V
Reference
CMPOUT
6
5
CMPIN
3
4
Comparator
GND
RESET
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.
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ
ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ
ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ
Copyright 2006, Texas Instruments Incorporated
www.ti.com
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SBOS374 − NOVEMBER 2006
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
(1)
ABSOLUTE MAXIMUM RATINGS
handledwith appropriate precautions. Failure to observe
proper handling and installation procedures can cause damage.
Supply Voltage, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Current-Shunt Monitor Analog Inputs, V , V
IN+ IN−
Differential (V ) − (V ) . . . . . . . . . . . . . . . . . . −18V to +18V
IN+
(2)
IN−
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.
Common Mode
Comparator Analog Input and Reset Pins
. . . . . . . . . . . . . . . . . . . . . . . . −16V to +80V
(2)
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND − 0.3V to (V+) + 0.3V
(2)
Analog Output, Out
Comparator Output, Out Pin
Input Current Into Any Pin
. . . . . . . . . . . . . GND − 0.3V to (V+) + 0.3V
(2)
. . . . . . . . . . . . . GND − 0.3V to 18V
. . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
(2)
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)
(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.
(1)
ORDERING INFORMATION
PRODUCT
GAIN
PACKAGE-LEAD
PACKAGE DESIGNATOR PACKAGE MARKING
MSOP-8
DGK
D
BQH
INA200A
BQJ
INA200
20V/V
50V/V
(2)
SO-8
MSOP-8
DGK
D
INA201
INA202
(2)
SO-8
INA201A
BQL
MSOP-8
DGK
D
100V/V
(2)
SO-8
INA202A
(1)
(2)
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.
Available Q1, 2007.
PIN CONFIGURATIONS
TOP VIEW
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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SBOS374 − NOVEMBER 2006
ELECTRICAL CHARACTERISTICS: CURRENT-SHUNT MONITOR
Boldface limits apply over the specified temperature range: T = −40°C to +125°C.
A
At T = +25°C, V = +12V, V
= +12V, V
= 100mV, R = 10kΩ to GND, R
= 5.1kΩ connected from CMP
to V , and CMP = GND,
A
S
CM
SENSE
L
PULL-UP
OUT
S
IN
unless otherwise noted.
INA200, INA201, INA202
TYP
CURRENT-SHUNT MONITOR
PARAMETERS
CONDITIONS
MIN
MAX
UNITS
INPUT
Full-Scale Sense Input Voltage
V
V
= V
− V
IN−
0.15
(V − 0.25)/Gain
S
V
V
SENSE
SENSE
IN+
Common-Mode Input Range
Common-Mode Rejection
Over Temperature
V
CM
−16
80
80
CMR
V
= −16V to +80V
100
123
0.5
dB
IN+
V
= +12V to +80V
100
dB
IN+
(1)
Offset Voltage, RTI
V
OS
2.5
3
mV
mV
mV
µV/°C
µV/V
µA
+25°C to +125°C
−40°C to +25°C
vs Temperature
vs Power Supply
3.5
dV /dT
OS
T
to T
5
2.5
9
MIN
MAX
= +18V, 2.7V
PSR
V
= 2V, V
100
16
OUT
IN+
Input Bias Current, V
Pin
I
B
IN−
OUTPUT (V
Gain:
≥ 20mV)
SENSE
G
INA200
20
50
V/V
V/V
V/V
%
INA201
INA202
100
0.2
Gain Error
V
= 20mV to 100mV
1
SENSE
Over Temperature
V
= 20mV to 100mV
2
%
SENSE
(2)
Total Output Error
V
= 120mV, V = +16V
0.75
2.2
3.5
%
SENSE
S
Over Temperature
V
= 120mV, V = +16V
%
SENSE
S
(3)
Nonlinearity Error
V
= 20mV to 100mV
0.002
1.5
%
SENSE
Output Impedance
R
O
Ω
Maximum Capacitive Load
No Sustained Oscillation
10
nF
(4)
< 20mV)
OUTPUT (V
SENSE
INA200, INA201, INA202
INA200
−16V ≤ V
< 0V
300
mV
V
CM
0V ≤ V
0V ≤ V
0V ≤ V
≤ V , V = 5V
≤ V , V = 5V
≤ V , V = 5V
0.4
1
CM
CM
S
S
INA201
V
S
S
INA202
2
V
CM
S
S
INA200, INA201, INA202
V
S
< V
≤ 80V
300
mV
CM
(5)
VOLTAGE OUTPUT
Output Swing to the Positive Rail
V
= 11V, V
= 12V
(V+) − 0.15
(V+) − 0.25
V
V
IN−
IN+
(6)
Output Swing to GND
V
IN−
= 0V, V
= −0.5V
(V ) + 0.004
GND
(V ) + 0.05
GND
IN+
FREQUENCY RESPONSE
Bandwidth:
INA200
BW
SR
C
C
C
= 5pF
= 5pF
= 5pF
< 10nF
500
300
200
40
kHz
kHz
LOAD
LOAD
LOAD
INA201
INA202
kHz
Phase Margin
Slew Rate
C
LOAD
Degrees
V/µs
1
V
= 10mV to 100mV
,
SENSE
PP
PP
Settling Time (1%)
2
µs
C
LOAD
= 5pF
NOISE, RTI
Voltage Noise Density
40
nV/√Hz
(1)
(2)
(3)
(4)
(5)
(6)
Offset is extrapolated from measurements of the output at 20mV and 100mV V
.
SENSE
Total output error includes effects of gain error and V
Linearity is best fit to a straight line.
.
OS
For details on this region of operation, see the Accuracy Variations as a Result of V
See Typical Characteristic curve Output Swing vs Output Current.
Specified by design.
and Common-Mode Voltage section in the Applications Information.
SENSE
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SBOS374 − NOVEMBER 2006
ELECTRICAL CHARACTERISTICS: COMPARATOR
Boldface limits apply over the specified temperature range: T = −40°C to +125°C.
A
At T = +25°C, V = +12V, V
= +12V, V
= 100mV, R = 10kΩ to GND, and R
= 5.1kΩ connected from CMP
to V , unless otherwise
S
A
S
CM
SENSE
L
PULL-UP
OUT
noted.
INA200, INA201, INA202
COMPARATOR PARAMETERS
OFFSET VOLTAGE
CONDITIONS
MIN
TYP
MAX
UNITS
Threshold
T
= +25°C
590
600
−8
610
mV
mV
mV
A
Over Temperature
586
614
(1)
Hysteresis
T = −40°C to +85°C
A
(2)
INPUT BIAS CURRENT
CMP Pin
IN
0.005
10
nA
vs Temperature
15
nA
INPUT VOLTAGE RANGE
CMP Pin
IN
0V to V − 1.5V
S
V
OUTPUT (OPEN-DRAIN)
Large-Signal Differential Voltage Gain
CMP V
1V to 4V, R ≥ 15kΩ Connected to 5V
200
0.0001
220
V/mV
µA
mV
OUT
L
(3)(4)
High-Level Leakage Current
I
V
ID
= 0.4V, V
= V
1
LKG
OH
S
(3)
Low-Level Output Voltage
V
V
ID
= −0.6V, I = 2.35mA
300
OL
OL
RESPONSE TIME
(5)
Response Time
R
L
to 5V, C = 15pF, 100mV Input Step with 5mV Overdrive
1.3
µs
L
RESET
(6)
RESET Threshold
1.1
2
V
MΩ
µs
Logic Input Impedance
Minimum RESET Pulse Width
RESET Propagation Delay
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 1.
Specified by design.
(2)
(3)
(4)
(5)
(6)
V
refers to the differential voltage at the comparator inputs.
ID
Open-drain output can be pulled to the range of +2.7V to +18V, regardless of V .
S
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 1. Typical Comparator Hysteresis
4
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SBOS374 − NOVEMBER 2006
ELECTRICAL CHARACTERISTICS: GENERAL
Boldface limits apply over the specified temperature range: T = −40°C to +125°C.
A
At T = +25°C, V = +12V, V
= +12V, V
= 100mV, R = 10kΩ to GND, R
= 5.1kΩ connected from CMP
to V , and CMP = 1V,
A
S
CM
SENSE
L
PULL-UP
OUT
S
IN
unless otherwise noted.
INA200, INA201, INA202
GENERAL PARAMETERS
POWER SUPPLY
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Power Supply
Quiescent Current
V
+2.7
+18
1800
1850
V
µA
µA
V
S
I
Q
V
= 2V
1350
1.5
OUT
Over Temperature
V
= 0mV
SENSE
(1)
Comparator Power-On Reset Threshold
TEMPERATURE
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Resistance
MSOP-8 Surface-Mount
SO-8
−40
−55
−65
+125
+150
+150
°C
°C
°C
q
JA
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.
5
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TYPICAL CHARACTERISTICS
At T = +25°C, V = +12V, V
= 12V, and V = 100mV, unless otherwise noted.
SENSE
A
S
IN+
GAIN vs FREQUENCY
GAIN vs FREQUENCY
45
45
40
35
30
25
20
15
10
5
CLOAD = 1000pF
G = 100
G = 50
G = 100
G = 50
40
35
30
25
20
15
10
5
G = 20
G = 20
10k
1M
100k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
COMMON−MODE AND POWER−SUPPLY REJECTION
vs FREQUENCY
GAIN PLOT
20
18
16
14
12
10
8
140
130
120
110
100
90
100V/V
CMR
50V/V
PSR
80
20V/V
70
6
60
4
50
2
40
0
100
20
200 300 400 500 600 700 800 900
VDIFFERENTIAL (mV)
10
100
1k
10k
100k
Frequency (Hz)
OUTPUT ERROR vs VSENSE
OUTPUT ERROR vs COMMON−MODE VOLTAGE
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
−
−
8
50 100
350
−
12
−
16 20
0
150 200 250 300
VSENSE (mV)
400 450 500
16
4
0
4
8
12
...
76 80
Common−Mode Voltage (V)
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TYPICAL CHARACTERISTICS (continued)
At T = +25°C, V = +12V, V
= 12V, and V
= 100mV, unless otherwise noted.
A
S
IN+
SENSE
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
capability
approximately 400 A.
3
2
sinking
is
µ
1
_
+125 C
0
0
5
10
20
25
15
30
0
1
2
3
4
5
6
7
8
9
10
Output Current (mA)
Output Voltage (V)
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
−
_
40 C
VSENSE = 100mV
+
_
25 C
VS = 2.7V
VS = 12V
_
+125 C
VS = 12V
VS = 2.7V
VSENSE = 0mV
−
−
−
−
8 4
16 12
0
4
20 24 28 32
36
8
12 16
3.5
10.5
11.5 17
2.5
4.5 5.5 6.5 7.5 8.5 9.5
Supply Voltage (V)
18
VCM (V)
STEP RESPONSE
STEP RESPONSE
G = 20
G = 20
VSENSE = 10mV to 100mV
Time (2 s/div)
VSENSE = 10mV to 20mV
Time (2 s/div)
µ
µ
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SBOS374 − NOVEMBER 2006
TYPICAL CHARACTERISTICS (continued)
At T = +25°C, V = +12V, V
= 12V, and V
= 100mV, unless otherwise noted.
A
S
IN+
SENSE
STEP RESPONSE
STEP RESPONSE
G = 50
G = 20
VSENSE = 10mV to 20mV
VSENSE = 90mV to 100mV
µ
Time (5 s/div)
µ
Time (2 s/div)
STEP RESPONSE
STEP RESPONSE
G = 50
G = 50
VSENSE = 10mV to 100mV
VSENSE = 90mV to 100mV
µ
Time (5 s/div)
µ
Time (5 s/div)
COMPARATOR VOL vs ISINK
STEP RESPONSE
600
G = 100
500
400
300
200
100
VSENSE = 10mV to 100mV
Time (10 s/div)
0
0
1
2
3
4
5
6
µ
ISINK (mA)
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TYPICAL CHARACTERISTICS (continued)
At T = +25°C, V = +12V, V
= 12V, and V
= 100mV, unless otherwise noted.
A
S
IN+
SENSE
COMPARATOR TRIP POINT vs TEMPERATURE
COMPARATOR TRIP POINT vs SUPPLY VOLTAGE
602
601
600
599
598
597
596
600
599
598
597
596
595
594
593
592
591
590
−
−
25
50
0
25
50
75
100
4
125
2
6
8
10
12
14
16
18
_
Temperature ( C)
Supply Voltage (V)
COMPARATOR RESET VOLTAGE vs
SUPPLY VOLTAGE
COMPARATOR PROPAGATION DELAY
vs OVERDRIVE VOLTAGE
1.2
1.0
0.8
0.6
0.4
0.2
0
200
175
150
125
100
75
50
4
20
2
6
8
10
12
14
16
0
40
60
80 100 120 140 160 180
18
200
Supply Voltage (V)
Overdrive Voltage (mV)
COMPARATOR PROPAGATION DELAY vs
TEMPERATURE
COMPARATOR PROPAGATION DELAY
300
275
250
225
200
175
150
125
Input
200mV/div
Output
2V/div
µ
2 s/div
−
−
25
50
0
25
50
75
100
125
_
Temperature ( C)
9
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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
This section addresses the accuracy of these specific
operating regions:
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.
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
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.
Normal Case 1: V
≥ 20mV, V
≥ V
CM S
SENSE
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.
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.
VOUT1 * VOUT2
G +
100mV * 20mV
(1)
where:
OUT1 = Output Voltage with VSENSE = 100mV
VOUT2 = Output Voltage with VSENSE = 20mV
V
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
SENSE
V
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
VOUT1
(
)
RTI Referred−To−Input + ǒ Ǔ* 100mV
VOS
G
(2)
RSHUNT
Ω
3m
Load Supply
Load
−
18V to +80V
5V Supply
INA200
(G = 20)
1
2
V+
RPULL−UP
VIN+
8
7
Ω
4.7k
OUT
G
VIN−
CBYPASS
0.6V
Reference
R1
µ
0.01 F
CMPIN
GND
3
CMPOUT
RESET
6
5
Comparator
R2
4
Latch
Transparent/Reset
Figure 2. INA200 Basic Connections
10
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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.
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.
Normal Case 2: V
≥ 20mV, V
< V
CM S
SENSE
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 V
Case 1:
SENSE
V
< 20mV, −16V ≤ V
< 0; and
CM
SENSE
Low V
Case 3:
2.4
SENSE
INA202 VOUT Tested Limit(1)
V
< 20mV, V < V
≤ 80V
CM
2.2
SENSE
S
VCM1
2.0
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.
Ideal
1.8
VCM2
1.6
1.4
VCM3
1.2
1.0
V
OUT tested limit at
0.8
0.6
0.4
0.2
0
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.
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).
0
2
4
6
8
10 12 14 16 18 20 22
VSENSE (mV)
24
NOTE: (1) INA200 VOUT Tested Limit = 0.4V. INA201 VOUT Tested Limit = 1V.
Figure 4. Example for Low V
Case 2
SENSE
(INA202, Gain = 100)
SELECTING R
S
2.0
1.8
1.6
1.4
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.
1.2
Actual
1.0
0.8
Ideal
0.6
0.4
0.2
0
2
TRANSIENT PROTECTION
0
4
6
8
10
12
14
16
18
20
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
VSENSE (mV)
Figure 3. Example for Low V
Cases 1 and 3
SENSE
(INA202, Gain = 100)
Low V
Case 2: V < 20mV, 0V ≤ V
≤ V
S
SENSE
SENSE
CM
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
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:
5kW
5kW ) RFILT
Gain Error % + 100 * ǒ100
Ǔ
(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 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.
OUTPUT VOLTAGE RANGE
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.
COMPARATOR
INPUT FILTERING
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
Ω
3m
VSUPPLY
Load
Ω
Ω
RFILTER <100
RFILTER < 100
−
INA200 INA202
CFILTER
VIN+
V+
OUT
1
2
3
4
8
7
6
5
VIN−
G
0.6V
Reference
f−3dB
CMPOUT
RESET
CMPIN
GND
1
2 (2RFILTER)CFILTER
f−
=
3dB
π
Comparator
SO−14, TSSOP−14
Figure 5. Input Filter (Gain Error — 1.5% to −2.2%)
12
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SBOS374 − NOVEMBER 2006
0.6V
VIN
0V
CMPOUT
RESET
Figure 6. Comparator Latching Capability
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
2
INA201 (G = 50)
INA202 (G = 100)
V+
To VIN+
Shunt
Option 3
VIN+
VIN
8
7
From
Shunt Option
1, 2, or 3
OUT
G
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 7. High-Side Switch Over-Current Shutdown
13
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Shunt
Option 1
Supply
To VIN+
To VIN
−
4.5V to 5.5V
Load
To VIN+
To VIN−
Shunt
Option 2
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
R4
2.2k
1
Ω
V+
VIN+
VIN−
8
7
R1
22k
From
Shunt Option
1, 2, or 3
2
OUT
Ω
G
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 8. Low-Side Switch Over-Current Shutdown
14
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RSHUNT
Supply
4.5V to 5.5V
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
2
V+
R5
2.2k
VIN+
VIN−
8
7
Ω
OUT
G
0.6V
Reference
R1
R2
CMPIN
GND
3
CMPOUT
RESET
6
5
Comparator
4
RESET
INA200 (G = 20)
INA201 (G = 50)
INA202 (G = 100)
1
2
R6
2.2k
V+
Ω
VIN+
VIN−
8
7
OUT
G
0.6V
R3
R4
Reference
CMPIN
GND
3
CMPOUT
RESET
6
5
Comparator
CMPOUT
R7
4
RESET
Ω
200k
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
INA200AIDGKR
INA200AIDGKRG4
INA200AIDGKT
Status (1)
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
MSOP
DGK
8
8
8
8
8
8
8
8
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
MSOP
MSOP
MSOP
MSOP
MSOP
MSOP
MSOP
MSOP
MSOP
MSOP
MSOP
DGK
DGK
DGK
DGK
DGK
DGK
DGK
DGK
DGK
DGK
DGK
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
250 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
INA200AIDGKTG4
INA201AIDGKR
INA201AIDGKRG4
INA201AIDGKT
250 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
250 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
INA201AIDGKTG4
INA202AIDGKR
INA202AIDGKRG4
INA202AIDGKT
250 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
250 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
INA202AIDGKTG4
250 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
(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
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products
Applications
Audio
Amplifiers
amplifier.ti.com
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DSP
dsp.ti.com
Broadband
Digital Control
Military
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/military
Interface
Logic
interface.ti.com
logic.ti.com
Power Mgmt
Microcontrollers
power.ti.com
Optical Networking
Security
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
microcontroller.ti.com
Low Power Wireless www.ti.com/lpw
Telephony
Video & Imaging
Wireless
www.ti.com/wireless
Mailing Address:
Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2006, Texas Instruments Incorporated
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500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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