NSI1303M/Dx
High Reliability Reinforced Isolated
Sigma-Delta Modulator with Internal Clock
Datasheet (EN) 1.0
RoHS-Compliant Packages:
Product Overview
SOP8(300mil)
SOP16(300mil)
The NSI1303 is a high performance Σ-Δ modulator 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 analog input is amplified and continuously sampled
by a second-order Σ-Δ modulator and converted to a
high speed, single bit data stream. The output bit-stream
of the NSI1303 is synchronized to the internally
generated clock. NSI1303 can achieve 16 bits resolution
and an 85dB (typ) signal to noise ratio (SNR) at
78.125kSPS by using an appropriate digital filter (such as
sinc3 filter) to decimate the bitstream from 20MHz
internal sampling clock.
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
The fail-safe functions including input common-mode
overvoltage detection and missing AVDD detection
simplify system-level design and diagnostics.
Device Information
Part Number
Package
Body Size
Key Features
NSI1303M/Dx-DSWVR
NSI1303M/Dx-DSWR
SOP8(300mil)
5.85mm × 7.50mm
Up to 5000VRMS Insulation Voltage
SOP16(300mil) 10.30mm × 7.50mm
10MHz and 20MHz internal clock frequency options
50mV or 250mV Linear Input Voltage Range
Excellent DC Performance:
Functional Block Diagrams
Offset Error: 50μV or 100μV (Max)
Offset Drift: 1μV/℃(Max)
Gain Error: 0.2% (Max)
AVDD
DVDD
VDD1 detection
Reference
INP
INN
Σ-Δ modulator
TX
RX
DOUT
RX
TX
Gain Drift: 40ppm/℃(Max)
High CMTI: 150kV/μs (Typ)
Os cilla tor
CLKO UT
VCM detection
System-Level Diagnostic Features:
AGND
DGND
AVDD monitoring
Figure 1. NSI1303M/Dx Block Diagram
Input common-mode overvoltage detection
Operation Temperature: -40℃~125℃
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