NSi1300
High Reliability Reinforced
Isolated Amplifier
Datasheet (EN) 1.4
Product Overview
NSI1300 is a high-performance isolated amplifier with
output separated from input based on the NOVOSENSE
capacitive isolation technology. The device has a linear
differential input signal range of ±50mV (±64mV full-scale)
or ±250mV (±320mV full-scale). The differential input is
ideally suited to shunt resistor-based current sensing in
high voltage applications where isolation is required.
The device has a fixed gain (8.2 or 41) and provides a
differential analog output.
The low offset and gain drift ensure the accuracy over
the entire temperature range. High common-mode
transient immunity ensures that the device is able to
provide accurate and reliable measurements even in the
presence of high-power switching such as in motor
control applications.
The fail-safe functions including input common-mode
overvoltage detection and missing VDD1 detection
simplify system-level design and diagnostics.
Key Features
Up to 5000Vrms Insulation voltage
±50mV or ±250mV linear Input Voltage Range
Fixed Gain: 8.2 or 41
Low Offset Error and Drift:
NSI1300D25: ±0.2mV (Max), -2~4μV/℃ (Max)
VDD1 monitoring
Input common-mode overvoltage detection
Operation Temperature: -40℃ ~125℃
RoHS-Compliant Packages:
SOP8(300mil)
Safety Regulatory Approvals
UL recognition: up to 5000Vrms for 1 minute per UL1577
CQC certification per GB4943.1-2011
CSA component notice 5A approval IEC60950-1
standard
DIN VDE V 0884-11:2017-01
Applications
Shunt current monitoring
AC motor controls
Uninterruptible Power Suppliers
Automotive onboard chargers
Device Information
Part Number
NSI1300D25-DSWVR
Package
SOP8(300mil)
Body Size
5.85mm × 7.50mm
NSI1300D05-DSWVR
SOP8(300mil)
5.85mm × 7.50mm
Functional Block Diagrams
NSI1300D05: ±0.1mV (Max), -0.8~1μV/℃ (Max)
Low Gain Error and Drift:
±0.3% (Max), ±50ppm/℃ (Max)
Low Nonlinearity and Drift:
±0.03% (Max), ±1ppm/℃ (Typ)
SNR: 86dB (Typ, BW=10kHz), 72dB (Typ, BW=100kHz)
Wide bandwidth: 310kHz (Typ)
High CMTI: 150kV/μs (Typ)
System-Level Diagnostic Features:
Copyright © 2020, NOVOSENSE
Figure 1. NSi1300 Block Diagram
Page 1
NSi1300
INDEX
1. PIN CONFIGURATION AND FUNCTIONS.......................................................................................................................................3
2. ABSOLUTE MAXIMUM RATINGS.................................................................................................................................................. 4
3. RECOMMENDED OPERATING CONDITIONS.................................................................................................................................4
4. THERMAL INFORMATION............................................................................................................................................................. 4
5. SPECIFICATIONS............................................................................................................................................................................ 5
5.1. ELECTRICAL CHARACTERISTICS: NSI1300D05................................................................................................................................ 5
5.2. ELECTRICAL CHARACTERISTICS: NSI1300D25................................................................................................................................ 6
5.3. TYPICAL PERFORMANCE CHARACTERISTICS..................................................................................................................................... 8
5.4. PARAMETER MEASUREMENT INFORMATION................................................................................................................................. 12
6. HIGH VOLTAGE FEATURE DESCRIPTION..................................................................................................................................... 12
6.1. INSULATION AND SAFETY RELATED SPECIFICATIONS........................................................................................................................ 12
6.2. INSULATION CHARACTERISTICS.................................................................................................................................................... 12
6.3. REGULATORY INFORMATION....................................................................................................................................................... 13
7. FUNCTION DESCRIPTION............................................................................................................................................................14
7.1. OVERVIEW...............................................................................................................................................................................14
7.2. ANALOG INPUT........................................................................................................................................................................ 14
7.3. ANALOG OUTPUT..................................................................................................................................................................... 14
8. APPLICATION NOTE.....................................................................................................................................................................16
8.1. TYPICAL APPLICATION CIRCUIT....................................................................................................................................................16
8.2. SHUNT RESISTOR SELECTION...................................................................................................................................................... 16
8.3. PCB LAYOUT............................................................................................................................................................................16
9. PACKAGE INFORMATION............................................................................................................................................................17
10. ORDERING INFORMATION....................................................................................................................................................... 18
11. DOCUMENTATION SUPPORT....................................................................................................................................................18
12. TAPE AND REEL INFORMATION................................................................................................................................................18
13. REVISION HISTORY....................................................................................................................................................................20
NOVOSENSE CONFIDENITIAL PAGE 4
NSi1300
Datasheet (EN) 1.4
1. Pin Configuration and Functions
Figure 1.1 NSi1300 Package
Table 1.1 NSi1300 Pin Configuration and Description
NSi1300 PIN
NO.
SYMBOL
FUNCTION
1
VDD1
Power supply for isolator side 1(3.0V to 5.5V)
2
INP
3
INN
Negative analog input
4
GND1
Ground 1, the ground reference for Isolator Side 1
5
GND2
Ground 2, the ground reference for Isolator Side 2
6
OUTN
Negative output
7
OUTP
Positive output
8
VDD2
Power supply for isolator side 2 (3.0V to 5.5V)
Copyright © 2020, NOVOSENSE
Positive analog input
(±250mV recommended for NSI1300D25 and ±50mV recommended for NSI1300D05)
Page 3
NSi1300
Datasheet (EN) 1.4
2. Absolute Maximum Ratings
Parameters
Symbol
Min
VDD1, VDD2
-0.3
6.5
V
INP, INN
GND1-6
VDD1+0.5
V
OUTP, OUTN
GND2-0.5
VDD2+0.5
V
Io
-10
10
mA
TOPR
-40
125
℃
Junction Temperature
TJ
-40
150
℃
Storage Temperature
TSTG
-55
150
℃
HBM (1)
±2000
V
CDM (2)
±1000
V
Power Supply Voltage
Input Voltage
Output Voltage
Output current per Output Pin
Operating Temperature
Electrostatic discharge
Typ
Max
Unit
(1) Human body model (HBM), per AEC-Q100-002-RevD
(2) Charged device model (CDM), per AEC-Q100-011-RevB
3. Recommended Operating Conditions
Parameters
Symbol
Min
Typ
Max
Side1 Power Supply
VDD1
3.0
5.0
5.5
V
Side2 Power Supply
VDD2
3.0
3.3
5.5
V
NSI1300D05
NSI1300D25
Unit
Differential input voltage before
clipping output
VClipping
Linear differential input full scale
voltage
VFSR
-50
50
mV
Operating common-mode input
voltage
VCM
-0.032
0.8
V
Differential input voltage before
clipping output
VClipping
Linear differential input full scale
voltage
VFSR
-250
250
mV
Operating common-mode input
voltage
VCM
-0.16
0.8
V
TA
-40
125
℃
Operating Ambient Temperature
±64
mV
±320
mV
4. Thermal Information
Parameters
Symbol
SOP8(300mil)
Unit
Junction–to-ambient thermal resistance
RθJA
86
℃/W
Junction-to-case (top) thermal resistance
RθJC(top)
28
℃/W
Copyright © 2020, NOVOSENSE
Page 4
NSi1300
Datasheet (EN) 1.4
Parameters
Symbol
SOP8(300mil)
Unit
Junction-to-board thermal resistance
RθJB
42
℃/W
Junction–to-top characterization parameter
ΨJT
4
℃/W
Junction-to-board characterization parameter
ΨJB
42
℃/W
5. Specifications
5.1. Electrical Characteristics: NSI1300D05
(VDD1 = 3.0V ~ 5.5V, VDD2 = 3.0V ~ 5.5V, INP = -50mV to +50mV, and INN = GND1 = 0V, TA = -40℃ to 125℃. Unless otherwise
noted, Typical values are at VDD1 = 5V, VDD2 = 3.3V, TA = 25℃)
Parameters
Symbol
Min
Typ
Max
Unit
Comments
Side1 Supply Voltage
VDD1
3.0
5.0
5.5
V
Side2 Supply Voltage
VDD2
3.0
3.3
5.5
V
Side1 Supply Current
IDD1
11.4
15.1
mA
Side2 Supply Current
IDD2
6.3
8.4
mA
2.3
2.7
V
VDD1 falling
V
Detection level has a typical
hysteresis of 96 mV
Power Supply
VDD1 undervoltage detection
threshold voltage
VDD1UV
1.8
VCMov
0.9
VOS
-0.1
±0.01
0.1
TCVOS
-0.8
±0.15
1
Analog Input
Common-mode overvoltage
detection level
Input offset voltage
Input offset drift
mV
INP = INN = GND1
μV/℃
CMRRdc
-120
dB
INP = INN, fIN = 0 Hz, VCM min ≤ VIN ≤
VCM max
CMRRac
-112
dB
INP = INN, fIN = 10 kHz, VCM min ≤
VIN ≤ VCM max
Single-ended input resistance
RIN
4.75
kΩ
INN = GND1
Differential input resistance
RIND
4.9
kΩ
Input capacitance
CI
2
pF
Input bias current
IIB
Common-mode rejection ratio
Input bias current drift
-29
TCIIB
-22
-14
µA
±1.5
nA/℃
41
V/V
INP = INN = GND1, IIB = (IIBP + IIBN) /
2
Analog Output
Nominal Gain
Gain error
Gain error thermal drift
Copyright © 2020, NOVOSENSE
EG
-0.3%
±0.05%
0.3%
TCEG
-50
±15
50
ppm/℃
Page 5
NSi1300
Parameters
Datasheet (EN) 1.4
Symbol
Nonlinearity
Min
Typ
-0.03%
±0.01%
Nonlinearity drift
Total harmonic distortion
THD
Output noise
80
Signal to noise ratio
Unit
VCMout
Failsafe differential output
voltage
VFAILSAFE
±1
ppm/℃
-85
dB
VIN =100mVpp, fIN = 10kHz, BW =
100kHz
260
µVRMS
INP = INN = GND1, BW = 100kHz
84
dB
VIN = 100mVpp, fIN = 1kHz, BW =
10kHz
72
dB
VIN = 100mVpp, fIN = 10kHz, BW =
100kHz
250
1.44
1.49
V
-2.6
-2.5
V
VCM>VCMov, or VDD1 missing
310
kHz
PSRRdc
-118
dB
PSRR vs VDD1, at DC
PSRRac
-116
dB
PSRR vs VDD1, 100mV and 10kHz
ripple
PSRRdc
-108
dB
PSRR vs VDD2, at DC
PSRRac
-97
dB
PSRR vs VDD2, 100mV and 10kHz
ripple
Output resistance
ROUT
< 0.2
Ω
Output short-circuit current
IOUT.OC
±13
mA
Common-mode transient
immunity
CMTI
150
kV/μs
Power supply rejection ratio (1)
BW
1.39
Comments
0.03%
SNR
Common-mode output voltage
Output bandwidth
Max
100
Common-mode transient
immunity
Timing
Rising time of OUTP, OUTN
tr
1.3
μs
Falling time of OUTP, OUTN
tf
1.3
μs
INP, INN to OUTP, OUTN signal
delay (50% - 50%)
tPD
1.6
Analog setting time
tAS
0.5
2.1
μs
ms
VDD1 step to 3.0 V with VDD2 ≥
3.0 V, to OUTP, OUTN valid, 0.1%
settling
(1) Input referred.
5.2. Electrical Characteristics: NSI1300D25
(VDD1 = 3.0V ~ 5.5V, VDD2 = 3.0V ~ 5.5V, INP = -250mV to +250mV, and INN = GND1 = 0V, TA = -40℃ to 125℃. Unless otherwise
noted, Typical values are at VDD1 = 5V, VDD2 = 3.3V, TA = 25℃)
Parameters
Symbol
Min
Typ
Max
Unit
Comments
Power Supply
Copyright © 2020, NOVOSENSE
Page 6
NSi1300
Parameters
Datasheet (EN) 1.4
Symbol
Min
Typ
Max
Side1 Supply Voltage
VDD1
3.0
5.0
5.5
V
Side2 Supply Voltage
VDD2
3.0
3.3
5.5
V
Side1 Supply Current
IDD1
11.4
15.1
mA
Side2 Supply Current
IDD2
6.3
8.4
mA
2.3
2.7
V
VDD1 falling
V
Detection level has a typical
hysteresis of 96 mV
VDD1 undervoltage detection
threshold voltage
Unit
VDD1UV
1.8
VCMov
0.9
VOS
-0.2
±0.01
0.2
mV
TCVOS
-2
1
4
μV/℃
Comments
Analog Input
Common-mode overvoltage
detection level
Input offset voltage
Input offset drift
INP = INN = GND1
CMRRdc
-106
dB
INP = INN, fIN = 0 Hz, VCM min ≤ VIN ≤
VCM max
CMRRac
-106
dB
INP = INN, fIN = 10 kHz, VCM min ≤
VIN ≤ VCM max
Single-ended input resistance
RIN
19
kΩ
INN = GND1
Differential input resistance
RIND
22
kΩ
Input capacitance
CI
2
pF
Input bias current
IIB
Common-mode rejection ratio
Input bias current drift
-24
TCIIB
-18
-12
µA
±1
nA/℃
8.2
V/V
INP = INN = GND1, IIB = (IIBP + IIBN) /
2
Analog Output
Nominal Gain
Gain error
Gain error thermal drift
EG
-0.3%
±0.05%
0.3%
TCEG
-50
±15
50
-0.03%
±0.01%
0.03%
Nonlinearity
Nonlinearity drift
Total harmonic distortion
THD
Output noise
80
Signal to noise ratio
Common-mode output voltage
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ppm/℃
±1
ppm/℃
-85
dB
VIN =500mVpp, fIN = 10kHz, BW =
100kHz
195
µVRMS
INP = INN = GND1, BW = 100kHz
86
dB
VIN = 500mVpp, fIN = 1kHz, BW =
10kHz
72
dB
VIN = 500mVpp, fIN = 10kHz, BW =
100kHz
SNR
VCMout
1.39
1.44
1.49
V
Page 7
NSi1300
Parameters
Failsafe differential output
voltage
Output bandwidth
Datasheet (EN) 1.4
Symbol
Min
VFAILSAFE
-2.6
250
Max
-2.5
Unit
V
Comments
VCM>VCMov, or VDD1 missing
310
kHz
PSRRdc
-104
dB
PSRR vs VDD1, at DC
PSRRac
-102
dB
PSRR vs VDD1, 100mV and 10kHz
ripple
PSRRdc
-90
dB
PSRR vs VDD2, at DC
PSRRac
-85
dB
PSRR vs VDD2, 100mV and 10kHz
ripple
Output resistance
ROUT
< 0.2
Ω
Common-mode transient
immunity
CMTI
150
kV/μs
Power supply rejection ratio (1)
BW
Typ
100
Common-mode transient
immunity
Timing
Rising time of OUTP, OUTN
tr
1.3
μs
Falling time of OUTP, OUTN
tf
1.3
μs
INP, INN to OUTP, OUTN signal
delay (50% - 50%)
tPD
1.6
Analog setting time
tAS
0.5
2.1
μs
ms
VDD1 step to 3.0 V with VDD2 ≥
3.0 V, to OUTP, OUTN valid, 0.1%
settling
(1) Input referred.
5.3. Typical Performance Characteristics
Unless otherwise noted, test at VDD1 = 5V, VDD2 = 3.3V, Vin = -250mV to 250mV (NSI1300D25) or -50mV to 50mV (NSI1300D05).
Figure 5.1 Common-Mode Overvoltage Detection Level vs Temperature
Copyright © 2020, NOVOSENSE
Figure 5.2 Input Offset Voltage vs Temperature (NSI1300D25)
Page 8
NSi1300
Datasheet (EN) 1.4
Figure 5.3 Input Offset Voltage vs Temperature (NSI1300D05)
Figure 5.7 Gain Error vs Temperature (NSI1300D05)
Figure 5.4 Common-Mode Rejection Ratio vs Temperature
Figure 5.8 Nonlinearity vs Temperature
Figure 5.5 Input Bias Current vs Temperature
Figure 5.9 THD vs Supply Voltage (NSI1300D05)
Figure 5.6 Gain Error vs Temperature (NSI1300D25)
Figure 5.10 THD vs Supply Voltage (NSI1300D25)
Copyright © 2020, NOVOSENSE
Page 9
NSi1300
Figure 5.11 THD vs Temperature (NSI1300D25)
Figure 5.12 THD vs Temperature (NSI1300D05)
Figure 5.13 Nonlinearity vs Input Voltage (NSI1300D25)
Figure 5.14 Nonlinearity vs Input Voltage (NSI1300D05)
Copyright © 2020, NOVOSENSE
Datasheet (EN) 1.4
Figure 5.15 SNR vs Supply Voltage (NSI1300D05)
Figure 5.16 SNR vs Supply Voltage (NSI1300D25)
Figure 5.17 SNR vs Temperature
Figure 5.18 Output Common-Mode Voltage vs Side2 Supply Voltage
Page 10
NSi1300
Figure 5.19 Output Common-Mode Voltage vs Temperature
Datasheet (EN) 1.4
Figure 5.23 Power-Supply Rejection Ratio vs Ripple Frequency
Figure 5.20 Fail-Safe Output Voltage vs Temperature
Figure 5.24 Supply Current vs Temperature (NSI1300D25)
Figure 5.21 Vin to Vout Delay vs Temperature
Figure 5.25 Supply Current vs Temperature (NSI1300D05)
Figure 5.22 Supply Current vs Supply Voltage
Figure 5.26 Output Voltage vs Input Voltage (NSi1300D25)
Copyright © 2020, NOVOSENSE
Page 11
NSi1300
Datasheet (EN) 1.0
5.4. Parameter Measurement Information
Figure 5.1 Common-Mode Transient Immunity Test Circuit
6. High Voltage Feature Description
6.1. Insulation and Safety Related Specifications
Parameters
Symbol
Value
Unit
Comments
Minimum External Air Gap
(Clearance)
CLR
8
mm
Shortest terminal-to-terminal distance
through air
Minimum External Tracking
(Creepage)
CPG
8
mm
Shortest terminal-to-terminal distance
across the package surface
Minimum internal gap
DTI
32
μm
Distance through insulation
Tracking Resistance (Comparative
Tracking Index)
CTI
>600
V
Material Group
I
DIN EN 60112 (VDE 0303-11); IEC
60112
IEC 60664-1
6.2. Insulation Characteristics
Description
Test Condition
Symbol
Value
Unit
DIN VDE 0110
For Rated Mains Voltage ≤ 150Vrms
I to IV
For Rated Mains Voltage ≤ 400Vrms
I to IV
For Rated Mains Voltage ≤ 300Vrms
I to IV
Climatic Classification
40/125/21
Pollution Degree per DIN VDE 0110,
2
Table 1
Maximum repetitive isolation voltage
Maximum working isolation voltage
Copyright © 2020, NOVOSENSE
VIORM
AC Voltage
DC Voltage
VIOWM
2121
VPEAK
1500
VRMS
2121
VDC
Page 12
NSi1300
Datasheet (EN) 1.4
Description
Test Condition
Input to Output Test Voltage, Method B1
VIORM × 1.875 = Vpd (m), 100%
production test,
tini = tm = 1 sec, partial discharge < 5
pC
Symbol
Value
Unit
V pd (m)
3977
VPEAK
Input to Output Test Voltage, Method A
After Environmental Tests Subgroup 1
VIORM × 1.6 = Vpd (m), tini = 60 sec, tm =
10 sec, partial discharge < 5 pC
V pd (m)
3394
VPEAK
After Input and /or Safety Test Subgroup 2
and Subgroup 3
VIORM × 1.2= Vpd (m), tini = 60 sec, tm =
10 sec, partial discharge < 5 pC
V pd (m)
2545
VPEAK
t = 60 sec
VIOTM
8000
VPEAK
Test method per IEC60065,1.2/50us
waveform, VTEST=VIOSM × 1.6
VIOSM
6250
VPEAK
VIO =500V, Tamb=Ts
RIO
>109
Ω
VIO =500V, 100℃ ≤ Tamb ≤ 125℃
RIO
>1011
Ω
f = 1MHz
CIO
0.8
pF
θJA = 86 ℃/W, VI = 5.5V, TJ = 150 ℃,
TA = 25 ℃
Ps
1430
mW
θJA = 86 ℃/W, VI = 5.5V, TJ = 150 ℃,
TA = 25 ℃
Is
260
mA
Ts
150
℃
VISO
5000
VRMS
Maximum transient isolation voltage
Maximum Surge Isolation Voltage
Isolation resistance
Isolation capacitance
Total Power Dissipation at 25℃
Safety input, output, or supply current
Maximum safety temperature
UL1577
VTEST = VISO, t = 60 s (qualification),
Insulation voltage per UL
VTEST = 1.2 × VISO, t = 1 s (100%
production test)
Figure 6.1 NSi1300 Thermal Derating Curve, Dependence of Safety Limiting Values with Case Temperature per DIN VDE V 0884-11
6.3. Regulatory Information
The NSi1300 are approved or pending approval by the organizations listed in table.
UL
Copyright © 2020, NOVOSENSE
VDE
CQC
Page 13
NSi1300
Datasheet (EN) 1.4
UL
VDE
CQC
Certified by CQC11-4715432012
UL 1577 Component
Recognition Program
Approved under CSA
Component Acceptance
Notice 5A
DIN VDE V 0884-11(VDE V
0884-11):2017-01
Single Protection, 5000Vrms
Isolation voltage
Single Protection, 5000Vrms
Isolation voltage
Reinforce Insulation
2121Vpeak, VIOSM=6250Vpeak
Reinforced insulation
Certificate No.E500602
Certificate No.E500602
Certificate No.40052820
CQC20001264938
GB4943.1-2011
7. Function Description
7.1. Overview
The NSI1300 is a high performance isolated amplifier that accept fully-differential input. The fully-differential input is ideally suited to
shunt current monitoring in high voltage applications where isolation is required. The analog input is continuously sampled by a
second-order Σ-Δ modulator in the device, which is driven by a pre-stage fully-differential amplifier in the device. With the internal
voltage reference and clock generator, the modulator convert the analog input signal to a digital bitstream. The output of the
modulator is transferred by the drivers (called TX in the Functional Block Diagram) across the isolation barrier that separates the
isolated side1 and side2 voltage. The received bitstream and clock are synchronized and processed, as shown in the Functional Block
Diagram, by a fourth-order analog filter on the side2 and has a differential output.
Figure 7.1 Function Block Diagram
7.2. Analog Input
There are two restrictions on the analog input signals (VINP and VINN).
If the input voltage exceeds the range GND1 – 6 V to VDD1 + 0.5 V, the input current must be limited to 10 mA because the
device input electrostatic discharge (ESD) diodes turn on.
The linearity and noise performance of the device are ensured only when the analog input voltage remains within the specified
linear full-scale range (FSR) and within the specified common-mode input voltage range.
7.3. Analog Output
For linear input range, the analog output of NSI1300 has a fixed gain (8.2 for NSI1300D25 and 41 for NSI1300D05). If a full-scale
input signal is applied to the NSI1300 (VIN ≥ VClipping), the analog output will be clipped (typically, 2.45V for positive clipping and 2.45V for negative clipping).
In addition, NSI1300 integrates some diagnostic measures and offers a fail-safe output to simplify system-level design. The fail-safe
output is a negative differential output voltage that does not occur under normal device operation, and it will only be activated in
following conditions:
When the undervoltage of VDD1 is detected (VDD1< VDD1UV).
When the overvoltage of common-mode input voltage is detected (VCM>VCMov).
Copyright © 2020, NOVOSENSE
Page 14
NSi1300
Datasheet (EN) 1.4
Vout (differential)
VNeg_Clip = -2.45V(Typical)
Figure 7.2 Typical negative clipping output
VDD1
Vout (differential)
VFailsafe = -2.6V(Typical)
Figure 7.3 Typical Failsafe output when VDD1 undervoltage
VCM
Vout (differential)
VFailsafe = -2.6V(Typical)
Figure 7.4 Typical Failsafe output when input common mode signal overvoltage
Copyright © 2020, NOVOSENSE
Page 15
NSi1300
Datasheet (EN) 1.4
8. Application Note
8.1. Typical Application Circuit
NSI1300 is ideally suited to shunt resistor-based current sensing in high voltage applications such as frequency inverters. The typical
application circuit is shown in Figure 8.1.
The voltage across the shunt resistor Rsense is applied to the differential input of NSI1300 through a RC filter. The differential output
of the isolated amplifier is converted to a single-ended analog output with an operational-amplifier-based circuit. Suggest to
add >1kΩ resistor on the OUTP and OUTN pin to prevent output over-current. An analog-to-digital converter usually receives the
analog output and converts to digital signal for controller processing.
Figure 8.1 Typical application circuit in phase current sensing
8.2. Shunt Resistor Selection
Choosing a particular shunt resistor is usually a compromise between minimizing power dissipation and maximizing accuracy.
Smaller sense resistor decreases power dissipation, while larger sense resistor can improve measure accuracy by utilizing the full
input range of isolated amplifier.
There are two other factors should be considered when selecting the shunt resistor:
The voltage-drop caused by the rated current range must not exceed the recommended linear input voltage range: VSHUNT ≤ FSR.
The voltage-drop caused by the maximum allowed overcurrent must not exceed the input voltage that causes a clipping output:
VSHUNT ≤ VClipping.
8.3. PCB Layout
There are some key guidelines or considerations for optimizing performance in PCB layout:
NSI1300 requires a 0.1µF bypass capacitor between VDD1 and GND1, VDD2 and GND2. The capacitor should be placed as close
as possible to the VDD pin. If better filtering is required, an additional 1~10µF capacitor may be used.
Kelvin rules is recommended for the connection between shunt resistor to NSI1300. Because of the Kelvin connection, any
voltage drops across the trace and leads should have no impact on the measured voltage.
Place the shunt resistor close to the INP and INN inputs and keep the layout of both connections symmetrical and run very
close to each other to the input of the NSI1300. This minimizes the loop area of the connection and reduces the possibility of
stray magnetic fields from interfering with the measured signal.
Copyright © 2020, NOVOSENSE
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NSi1300
Datasheet (EN) 1.4
9. Package Information
Figure 9.1 SOW8 Package Shape and Dimension in millimeters
Copyright © 2020, NOVOSENSE
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NSi1300
Datasheet (EN) 1.4
Figure 9.2 SOW8 Package Board Layout Example
10. Ordering Information
Part No.
NSI1300D05 DSWVR
NSI1300D25 DSWVR
Isolation
Rating(kV)
Linear
Input
Range(mV)
Moisture
Sensitivity
Level
Temperature
Automotive
5
-50 ~ 50
Level-3
-40 to 125℃
NO
5
-250 ~ 250
Level-3
-40 to 125℃
NO
Package
Type
SOP8
(300mil)
SOP8
(300mil)
Package
Drawing
SPQ
SOW8
1000
SOW8
1000
11. Documentation Support
Part Number
Product Folder
Datasheet
Technical Documents
Isolator selection guide
NSi1300
Click here
Click here
Click here
Click here
12. Tape and Reel Information
Copyright © 2020, NOVOSENSE
Page 18
NSi1300
Datasheet (EN) 1.4
Figure 12.1 Tape and Reel Information of SOP8(300mil)
Copyright © 2020, NOVOSENSE
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NSi1300
Datasheet (EN) 1.4
13. Revision History
Revision
1.0
1.1
1.2
1.3
1.4
Description
Initial Release
Add Nonlinearity vs Input Voltage, Power-Supply Rejection Ratio vs Ripple
Frequency and Output Voltage vs Input Voltage Performance
Characteristics in 5.3
Update Certificate number of Regulatory Information in 6.3
Add VISO specification in 6.2 Insulation Characteristics and AEC-Q100
Date
2020/8/29
2021/1/16
Remove NSI1300x-Q1 order information and add in NSI1300x-Q1 datasheet
Add SOW8 package layout example
Update insulation characteristics
2021/7/12
qualification
Copyright © 2020, NOVOSENSE
2021/4/12
2021/7/17
Page 20