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NSi1306

High Reliability Reinforced

Isolated Sigma-Delta Modulator

Datasheet (EN) 1.5

Page

Product Overview

The NSI1306 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 data is

synchronous to the external clock with a frequency range

from 5MHz to 21MHz. By using an appropriate digital

filter (such as sinc3 filter) to decimate the bitstream, the

device can achieve 16 bits resolution and an

86dB/82.5dB signal to noise ratio (SNR) at 78.125kSPS

with a 20MHz master clock.

The fail-safe functions including input common-mode

overvoltage detection and missing AVDD detection

simplify system-level design and diagnostics.

Key Features

 Up to 5000V

RMS

Insulation Voltage

 Clock frequency: 5MHz to 21MHz

 ±50mV or ±250mV Linear Input Voltage Range

 Excellent DC Performance:

 Offset Error: ±50μV or ±100μV (Max)

 Offset Drift: -0.5~1.5μV/℃ (Max)

 Gain Error: ±0.2% (Max)

 Gain Drift: ±40ppm/

℃

(Max)

 SNR: 82.5dB or 86dB (Typ)

 High CMTI: 150kV/μs (Typ)

 System-Level Diagnostic Features:

 AVDD monitoring

 Input common-mode overvoltage detection

 Operation Temperature: -40

℃

~125

℃

 RoHS-Compliant Packages:

 SOP8(300mil)

 SOP16(300mil)

Safety Regulatory Approvals

 UL recognition: up to 5000V

rms

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

 Power and solar inverters

 Uninterruptible Power Suppliers

 Automotive onboard chargers

Device Information

Part Number

Package

Body Size

NSI1306x-DSWVR

SOP8(300mil)

5.85mm × 7.50mm

NSI1306x-DSWR

SOP16(300mil)

10.30mm × 7.50mm

Functional Block Diagrams

Figure 1. NSi1306 Block Diagram

NSi1306

Datasheet (EN) 1.5

Page 2

INDEX

1. PIN CONFIGURATION AND FUNCTIONS

.......................................................................................................................................

2. ABSOLUTE MAXIMUM RATINGS

..................................................................................................................................................

3. RECOMMENDED OPERATING CONDITIONS

.................................................................................................................................

4. THERMAL INFORMATION

.............................................................................................................................................................

5. SPECIFICATIONS

............................................................................................................................................................................

5.1. ELECTRICAL CHARACTERISTICS: NSI1306M05

................................................................................................................................

5.2. ELECTRICAL CHARACTERISTICS: NSI1306M25

................................................................................................................................

5.3. TYPICAL PERFORMANCE CHARACTERISTICS

...................................................................................................................................

6. HIGH VOLTAGE FEATURE DESCRIPTION

.....................................................................................................................................

6.1. INSULATION AND SAFETY RELATED SPECIFICATIONS

........................................................................................................................

6.2. INSULATION CHARACTERISTICS

....................................................................................................................................................

6.3. REGULATORY INFORMATION

.......................................................................................................................................................

7. FUNCTION DESCRIPTION

............................................................................................................................................................

7.1. OVERVIEW

...............................................................................................................................................................................

7.2. ANALOG INPUT

........................................................................................................................................................................

7.3. DIGITAL INPUT

..........................................................................................................................................................................

7.4. DIGITAL OUTPUT

......................................................................................................................................................................

7.5. FAIL-SAFE OUTPUT

....................................................................................................................................................................

8. APPLICATION NOTE

.....................................................................................................................................................................

8.1. TYPICAL APPLICATION CIRCUIT

....................................................................................................................................................

8.2. SHUNT RESISTOR SELECTION

.......................................................................................................................................................

8.3. DIGITAL FILTER

.........................................................................................................................................................................

8.4. PCB LAYOUT

............................................................................................................................................................................

9. PACKAGE INFORMATION

............................................................................................................................................................

10. ORDERING INFORMATION

.......................................................................................................................................................

11. DOCUMENTATION SUPPORT

....................................................................................................................................................

12. TAPE AND REEL INFORMATION

................................................................................................................................................

13. REVISION HISTORY

....................................................................................................................................................................