參數(shù)資料
型號(hào)： EVAL-AD7401EDZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 1/20頁(yè)
文件大小： 0K
描述： BOARD EVALUATION FOR AD7401
標(biāo)準(zhǔn)包裝： 1
系列： iCoupler®
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 20M
數(shù)據(jù)接口： 串行
輸入范圍： ±320 mV
在以下條件下的電源（標(biāo)準(zhǔn)）： 100mW @ 20MSPS
工作溫度： -40°C ~ 105°C
已用 IC / 零件： AD7401
已供物品： 板
Isolated Sigma-Delta Modulator
AD7401
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2006–2011 Analog Devices, Inc. All rights reserved.
FEATURES
20 MHz maximum external clock rate
Second-order modulator
16 bits no missing codes
±2 LSB INL typical at 16 bits
3.5 μV/°C maximum offset drift
On-board digital isolator
On-board reference
Low power operation: 20 mA maximum at 5.25 V
40°C to +105°C operating range
16-lead SOIC package
Safety and regulatory approvals
UL recognition
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 891 V peak
APPLICATIONS
AC motor controls
Data acquisition systems
A/D + opto-isolator replacements
GENERAL DESCRIPTION
The AD74011 is a second-order, sigma-delta (Σ-Δ) modulator
that converts an analog input signal into a high speed, 1-bit data
stream with on-chip digital isolation based on Analog Devices,
Inc. iCoupler technology. The AD7401 operates from a 5 V
power supply and accepts a differential input signal of ±200 mV
(±320 mV full scale). The analog input is continuously sampled
by the analog modulator, eliminating the need for external
sample-and-hold circuitry. The input information is contained
in the output stream as a density of ones with a data rate up to
20 MHz. The original information can be reconstructed with an
appropriate digital filter. The serial I/O can use a 5 V or a 3 V
supply (VDD2).
The serial interface is digitally isolated. High speed CMOS,
combined with monolithic air core transformer technology,
means the on-chip isolation provides outstanding performance
characteristics, superior to alternatives such as optocoupler
devices. The part contains an on-chip reference. The AD7401
is offered in a 16-lead SOIC and has an operating temperature
range of 40°C to +105°C.
An internal clock version, AD7400, is also available.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.
FUNCTIONAL BLOCK DIAGRAM
VIN+
VDD1
VDD2
VIN–
Σ- ADC
CONTROL LOGIC
AD7401
BUF
T/H
REF
WATCHDOG
GND1
GND2
MDAT
MCLKIN
DECODE
ENCODE
DECODE
ENCODE
UPDATE
WATCHDOG
UPDATE
05
85
1-
0
01
Figure 1.
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