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Número de pieza INA205
Descripción (INA203 - INA205) Unidirectional Measurement Current-Shunt Monitor
Fabricantes Burr-Brown 
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No Preview Available ! INA205 Hoja de datos, Descripción, Manual

BurrĆBrown Products
from Texas Instruments
INA203
INA203
INA203
INA203
INA204
INA205
SBOS393 – MARCH 2007
Unidirectional Measurement
Current-Shunt Monitor with Dual Comparators
FEATURES
COMPLETE CURRENT SENSE SOLUTION
DUAL COMPARATORS:
– Comparator 1 with Latch
– Comparator 2 with Optional Delay
COMMON-MODE RANGE: –16V to +80V
HIGH ACCURACY: 3.5% (max) Over
Temperature
BANDWIDTH: 500kHz
QUIESCENT CURRENT: 1.8mA
PACKAGES: SO-14, TSSOP-14, MSOP-10
APPLICATIONS
NOTEBOOK COMPUTERS
CELL PHONES
TELECOM EQUIPMENT
AUTOMOTIVE
POWER MANAGEMENT
BATTERY CHARGERS
WELDING EQUIPMENT
INA203-INA205
VS 1
OUT 2
CMP1 IN-/0.6V REF 3
CMP1 IN+ 4
CMP2 IN+ 5
CMP2 IN-/0.6V REF 6
GND 7
1.2V REF
14 VIN+
13 VIN-
12 1.2V REF OUT
11 CMP1 OUT
10 CMP2 OUT
9 CMP2 DELAY
8 CMP1 RESET
SO-14, TSSOP-14
DESCRIPTION
The INA203, INA204, and INA205 are a family of
unidirectional, current-shunt monitors with voltage
output, dual comparators, and voltage reference. The
INA203, INA204, and INA205 can sense drops
across shunts at common-mode voltages from –16V
to +80V. The INA203, INA204, and INA205 are
available with three output voltage scales: 20V/V,
50V/V, and 100V/V, with up to 500kHz bandwidth.
The INA203, INA204, and INA205 also incorporate
two open-drain comparators with internal 0.6V
references. On 14-pin versions, the comparator
references can be overridden by external inputs.
Comparator 1 includes a latching capability, and
Comparator 2 has a user-programmable delay.
14-pin versions also provide a 1.2V reference output.
The INA203, INA204, and INA205 operate from a
single +2.7V to +18V supply. They are specified over
the extended operating temperature range of –40°C
to +125°C.
INA203-INA205
VS 1
OUT 2
CMP1 IN+ 3
CMP2 IN+ 4
GND 5
0.6V REF
MSOP-10
10 VIN+
9 VIN-
8 CMP1 OUT
7 CMP2 OUT
6 CMP1 RESET
DEVICE
INA203
INA204
INA205
GAIN
20V/V
50V/V
100V/V
RELATED PRODUCTS
FEATURES
Variant of INA203–INA205 Comparator 2 polarity
Current-shunt monitor with single Comparator
and VREF
Current-shunt monitor only
Current-shunt monitor with split stages for filter
options
PRODUCT
INA206–INA208
INA200–INA202
INA193–INA198
INA270–INA271
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.
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 © 2007, Texas Instruments Incorporated

1 page




INA205 pdf
www.ti.com
INA203
INA204
INA205
SBOS393 – MARCH 2007
ELECTRICAL CHARACTERISTICS: REFERENCE
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 = 10kto GND, and RPULL-UP = 5.1keach connected from
CMP1 OUT and CMP2 OUT to VS, unless otherwise noted.
INA203, INA204, INA205
REFERENCE PARAMETERS
CONDITIONS
MIN TYP MAX UNIT
REFERENCE VOLTAGE
1.2VREFOUT Output Voltage
1.188 1.2 1.212
V
Reference Drift
dVOUT/dT
TA = –40°C to +85°C
40 100 ppm/°C
0.6VREF Output Voltage (Pins 3 and 6 of 14-pin packages only)
0.6 V
Reference Drift
dVOUT/dT
TA = –40°C to +85°C
40 100 ppm/°C
LOAD REGULATION
dVOUT/dILOAD
Sourcing
0mA < ISOURCE < 0.5mA
0.4 2 mV/mA
Sinking
0mA < ISINK < 0.5mA
0.4 mV/mA
LOAD CURRENT
ILOAD
1 mA
LINE REGULATION
dVOUT/dVS
2.7V < VS < 18V
30 µV/V
CAPACITIVE LOAD
Reference Output Maximum Capacitive Load
No Sustained Oscillations
10
nF
OUTPUT IMPEDANCE
Pins 3 and 6 of 14-Pin Packages Only
10 k
ELECTRICAL CHARACTERISTICS: GENERAL
Boldface limits apply over the specified temperature range: TA = –40°C to +125°C.
All specifications at TA = +25°C, VS = +12V, VCM = +12V, VSENSE = 100mV, RL = 10kto GND, RPULL-UP = 5.1keach
connected from CMP1 OUT and CMP2 OUT to VS, and CMP1 IN+ = 1V and CMP2 IN– = GND, unless otherwise noted.
INA203, INA204, INA205
GENERAL PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNIT
POWER SUPPLY
Operating Power Supply
Quiescent Current
Over Temperature
Comparator Power-On Reset Threshold(1)
VS
IQ
VOUT = 2V
VSENSE = 0mV
+2.7
+18 V
1.8 2.2 mA
2.8 mA
1.5 V
TEMPERATURE
Specified Temperature Range
–40
+125
°C
Operating Temperature Range
–55
+150
°C
Storage Temperature Range
–65
+150
°C
Thermal Resistance
MSOP-10 Surface-Mount
θJA
200 °C/W
SO-14, TSSOP-14 Surface-Mount
150 °C/W
(1) The INA203, INA204, and INA205 are designed to power-up with the comparator in a defined reset state as long as CMP1 RESET is
open or grounded. The comparator will be 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 CMP1 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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INA205 arduino
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INA203
INA204
INA205
SBOS393 – MARCH 2007
APPLICATIONS INFORMATION
BASIC CONNECTIONS
Figure 30 shows the basic connections of the
INA203, INA204, and INA205. 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 INA203, INA204, and
INA205 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 INA203, INA204, and INA205
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
Normal Case 1: VSENSE 20mV, VCM VS
This region of operation provides the highest
accuracy. Here, the input offset voltage is
characterized and measured using a two-step
method. First, the gain is determined by Equation 1.
G = VOUT1 - VOUT2
100mV - 20mV
(1)
where:
VOUT1 = Output Voltage with VSENSE = 100mV
VOUT2 = Output Voltage with VSENSE = 20mV
Then the offset voltage is measured at VSENSE =
100mV and referred to the input (RTI) of the current
shunt monitor, as shown in Equation 2.
VOSRTI (Referred-To-Input) =
VOUT1
G
- 100mV
(2)
Load Supply
-18V to +80V
RSHUNT
3mW
Load
5V Supply
Current Shunt
Monitor Output
CBYPASS
0.01mF
VS
OUT
CMP1 IN-/0.6 REF
CMP1 IN+
CMP2 IN+
CMP2 IN-/0.6 REF
GND
INA203
x20
1.2V REF
VIN+
VIN-
1.2V REF OUT
CMP1 OUT
CMP2 OUT
CMP2 DELAY
CMP1 RESET
Transparent/Reset
RPULL-UP
4.7kW
Optional Delay
Capacitor
0.2mF
Latch
RPULL-UP
4.7kW
Figure 30. INA20x Basic Connection
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