ad7476-ep Analog Devices, Inc., ad7476-ep Datasheet

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ad7476-ep

Manufacturer Part Number
ad7476-ep
Description
12-bit Adc In 6-lead Sot-23 Ad7476-ep
Manufacturer
Analog Devices, Inc.
Datasheet
FEATURES
Specified for V
Low power
Wide input bandwidth
High speed serial interface
Standby mode: 1 μA maximum
6-lead SOT-23 package
ENHANCED PRODUCT FEATURES
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available upon request
APPLICATIONS
Battery-powered systems
Instrumentation and control systems
Data acquisition systems
GENERAL DESCRIPTION
The AD7476
approximation ADC. The part operates from a single 2.35 V
to 5.25 V power supply and features throughput rates up to
600 kSPS. The part contains a low noise, wide bandwidth, track-
and-hold amplifier that can handle input frequencies in excess
of 6 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the device to interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS and the conversion is initiated at this
point. There are no pipeline delays associated with this part.
The AD7476 uses advanced design techniques to achieve very
low power dissipation at high throughput rates.
1
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Protected by U.S. Patent No. 6,681,332.
3.6 mW at 600 kSPS with 3 V supplies
15 mW at 600 kSPS with 5 V supplies
70 dB SNR at 100 kHz input frequency
SPI/QSPI™/MICROWIRE™/DSP compatible
Personal digital assistants
Medical instruments
Mobile communications
1
is a 12-bit, high speed, low power, successive
DD
of 2.35 V to 5.25 V
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The reference for the part is taken internally from V
allows the widest dynamic input range to the ADC. Thus, the
analog input range for the part is 0 V to V
rate is determined by the SCLK pin.
Additional application and technical information can be found
in the
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
First 12-Bit ADC in a SOT-23 Package.
High Throughput with Low Power Consumption.
Flexible Power/Serial Clock Speed Management. The
conversion rate is determined by the serial clock, allowing
the conversion time to be reduced through the serial clock
speed increase. This allows the average power consumption
to be reduced while not converting. The part also features a
shutdown mode to maximize power efficiency at lower
throughput rates. Current consumption is 1 μA maximum
when in shutdown mode.
Reference Derived from the Power Supply.
No Pipeline Delay. The part features a standard successive-
approximation ADC with accurate control of the sampling
instant via a CS input and once-off conversion control.
AD7476
FUNCTIONAL BLOCK DIAGRAM
V
IN
data sheet.
©2010 Analog Devices, Inc. All rights reserved.
APPROXIMATION
AD7476-EP
SUCCESSIVE-
CONTROL
in 6-Lead SOT-23
LOGIC
12-BIT
Figure 1.
ADC
GND
V
DD
AD7476-EP
12-Bit ADC
DD
. The conversion
SCLK
SDATA
CS
www.analog.com
DD
. This

Related parts for ad7476-ep

ad7476-ep Summary of contents

Page 1

... ADC with accurate control of the sampling instant via a CS input and once-off conversion control. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2010 Analog Devices, Inc. All rights reserved. 12-Bit ADC AD7476-EP SCLK SDATA CS . This DD . The conversion DD www ...

Page 2

... AD7476-EP TABLE OF CONTENTS Features .............................................................................................. 1 Enhanced Product Features ............................................................ 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 REVISION HISTORY 8/10—Revision 0: Initial Version   Timing Specifications ...................................................................5   Absolute Maximum Ratings ............................................................6   ESD Caution...................................................................................6   Pin Configuration and Function Descriptions..............................7   Typical Performance Characteristics ..............................................8   ...

Page 3

... V max ±10 μA max 10 pF max Straight (natural) binary 1.33 μs max 500 ns max 400 ns max 600 kSPS max Rev Page AD7476- unless otherwise noted. A MIN MAX Test Conditions/Comments f = 100 kHz sine wave 25° 103.5 kHz 113.5 kHz fa = 103 ...

Page 4

... AD7476-EP Parameter POWER REQUIREMENTS Normal Mode (Static) Normal Mode (Operational) Full Power-Down Mode Power Dissipation Normal Mode (Operational) Full Power-Down 1 S version specifications apply as typical figures when V 2 Guaranteed by characterization MAX = 600 kSPS. SAMPLE S Version Unit 2.35/5.25 V min/max 2 mA typ ...

Page 5

... the true bus relinquish time of the part and is independent of the bus 8 200µ OUTPUT PIN C L 50pF 200µ Figure 2. Load Circuit for Digital Output Timing Specifications Rev Page and timed from a voltage level of 1 1.6V AD7476-EP ...

Page 6

... AD7476-EP ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND DD Analog Input Voltage to GND Digital Input Voltage to GND Digital Output Voltage to GND Input Current to Any Pin Except Supplies Operating Temperature Range Enhanced Plastic (EP Version) Storage Temperature Range Junction Temperature SOT-23 Package θ ...

Page 7

... Data Out. Logic output. The conversion result is provided on this output as a serial data stream. The bits are clocked out on the falling edge of the SCLK input. The data stream from the AD7476-EP consists of four leading zeros followed by the 12 bits of conversion data; this is provided MSB first. ...

Page 8

... THD = –80.88dB SFDR = –83.23dB 200 250 3 00 Rev Page –69.0 SCLK = 12MHz –69.5 –70.0 –70.5 –71.0 –71.5 –72.0 –72.5 10k 100k INPUT FREQUENCY (kHz) Figure 5. AD7476-EP SINAD vs. Input Frequency at 605 kSPS V = 2.35V 2. 5.25V 4.75V 3. ...

Page 9

... MIN 0.95 MIN 10° SEATING 0.50 MAX PLANE 0.30 MIN COMPLIANT TO JEDEC STANDARDS MO-178-AB Figure 6. 6-Lead Small Outline Transistor Package [SOT-23] (RJ-6) Dimensions shown in millimeters Package Description 2 Linearity Error (LSB) ±1.5 maximum 6-Lead SOT-23 Rev Page AD7476-EP 0.55 0.45 0.60 4° 0.35 BSC 0° Package Option RJ-6 Branding C73# ...

Page 10

... AD7476-EP NOTES Rev Page ...

Page 11

... NOTES Rev Page AD7476-EP ...

Page 12

... AD7476-EP NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09224-0-8/10(0) Rev Page ...

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