ADuM7701 Datasheet | Sigma-Delta Modulator





(Datasheet) ADuM7701 Datasheet PDF Download

Part Number ADuM7701
Description Sigma-Delta Modulator
Manufacture Analog Devices
Total Page 22 Pages
PDF Download Download ADuM7701 Datasheet PDF

Features: 16234-001 Data Sheet FEATURES 5 MHz to 21 MHz master clock input frequency Off set drift vs. temperature: ±0.6 μV/° C maximum SNR: 86 dB typical 16 bits, n o missing codes Full-scale analog input voltage range: ±320 mV ENOB: 14 bits typical IDD1: 10 mA maximum On-board di gital isolator Operating temperature ra nge: −40°C to +125°C High common-mo de transient immunity: 150 kV/μs minim um, VDD2 = 3.3 V Wide-body SOICs 16-lea d SOIC_W 8-lead SOIC_IC with increased creepage Safety and regulatory approval s (pending) UL recognition 5700 V rms f or 1 minute per UL 1577 CSA Component A cceptance Notice 5A VDE Certificate of Conformity DIN V VDE V 0884-10: VIORM = 1270 VPEAK DIN V VDE V 0884-11: VIORM = 1060 VPEAK APPLICATIONS Shunt current monitoring AC motor controls Power and solar inverters Wind turbine inverters Analog-to-digital and optoisolator rep lacement GENERAL DESCRIPTION The ADuM77 01 is a high performance, second-order, Σ-Δ modulator that converts an analog input signal into a high speed, s.

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Data Sheet
FEATURES
5 MHz to 21 MHz master clock input frequency
Offset drift vs. temperature: ±0.6 μV/°C maximum
SNR: 86 dB typical
16 bits, no missing codes
Full-scale analog input voltage range: ±320 mV
ENOB: 14 bits typical
IDD1: 10 mA maximum
On-board digital isolator
Operating temperature range: −40°C to +125°C
High common-mode transient immunity: 150 kV/μs minimum,
VDD2 = 3.3 V
Wide-body SOICs
16-lead SOIC_W
8-lead SOIC_IC with increased creepage
Safety and regulatory approvals (pending)
UL recognition
5700 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
VDE Certificate of Conformity
DIN V VDE V 0884-10: VIORM = 1270 VPEAK
DIN V VDE V 0884-11: VIORM = 1060 VPEAK
APPLICATIONS
Shunt current monitoring
AC motor controls
Power and solar inverters
Wind turbine inverters
Analog-to-digital and optoisolator replacement
GENERAL DESCRIPTION
The ADuM7701 is a high performance, second-order, Σ-Δ
modulator that converts an analog input signal into a high
speed, single-bit data stream, with on-chip digital isolation
based on Analog Devices, Inc., iCoupler® technology. The
device operates from a 4.5 V to 5.5 V power supply range
(VDD1) and accepts a pseudo differential input signal of
±250 mV (±320 mV full-scale). The pseudo differential input
is ideally suited to shunt voltage monitoring in high voltage
applications where galvanic isolation is required.
The analog input is continuously sampled by a high performance
analog modulator and converted to a ones density digital output
stream with a data rate of up to 21 MHz. The original information
16-Bit, Isolated,
Sigma-Delta Modulator
ADuM7701
FUNCTIONAL BLOCK DIAGRAM
VDD1
VDD2
ADuM7701
CLK
DECODER
CLK
ENCODER
MCLKIN
VIN+
VIN–
GAIN
Σ-Δ ADC
DATA
ENCODER
DATA
DECODER
MDAT
GND1
Figure 1.
GND2
can be reconstructed with an appropriate sinc3 digital filter to
achieve an 86 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a
256 decimation rate and a 20 MHz master clock. The serial
input and output operates from a 5 V or a 3 V supply (VDD2).
The serial interface is digitally isolated. High speed complementary
metal-oxide semiconductor (CMOS) technology, combined with
monolithic transformer technology, results in the on-chip
isolation providing outstanding performance characteristics,
superior to alternatives such as optocoupler devices. The
ADuM7701 device is available in both a 16-lead and an 8-lead
wide-body SOIC and has an operating temperature range of
−40°C to +125°C.
Rev. 0
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