900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Analog Devices Semiconductor Electronic Components Datasheet

AD7495 Datasheet

1 MSPS / 12-Bit ADCs

No Preview Available !

Data Sheet
FEATURES
Fast throughput rate: 1 MSPS
Specified for VDD of 2.7 V to 5.25 V
Low power
4.5 mW max at 1 MSPS with 3 V supplies
10.5 mW max at 1 MSPS with 5 V supplies
Wide input bandwidth: 68 dB SNR at 300 kHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface
SPI-/QSPI™-/MICROWIRE-/DSP-compatible
On-board reference: 2.5 V (AD7495 only)
Standby mode: 1 μA max
8-lead MSOP and SOIC packages
APPLICATIONS
Battery-powered systems
Personal digital assistants
Medical instruments
Mobile communications
Instrumentation and control systems
Data acquisition systems
Optical sensors
GENERAL DESCRIPTION
The AD7475/AD74951 are 12-bit, high speed, low power,
successive-approximation ADCs that operate from a single
2.7 V to 5.25 V power supply with throughput rates up to 1 MSPS.
They contain a low noise, wide bandwidth track-and-hold
amplifier that can handle input frequencies above 1 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the devices to interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS and conversion is initiated at this point.
The conversion time is determined by the SCLK frequency.
There are no pipeline delays associated with the device.
The AD7475/AD7495 use advanced design techniques to
achieve very low power dissipation at high throughput rates.
With 3 V supplies and a 1 MSPS throughput rate, the AD7475
consumes just 1.5 mA, while the AD7495 consumes 2 mA. With
5 V supplies and 1 MSPS, the current consumption is 2.1 mA
for the AD7475 and 2.6 mA for the AD7495.
The analog input range for the devices is 0 V to REF IN. The
2.5 V reference for the AD7475 is applied externally to the REF IN
pin, while the AD7495 has an on-board 2.5 V reference.
1Protected by U.S. Patent No. 6,681,332
Rev. C
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
1 MSPS,12-Bit ADCs
AD7475/AD7495
FUNCTIONAL BLOCK DIAGRAM
VDD
VIN
REF IN
T/H 12-BIT
SUCCESSIVE
APPROXIMATION
ADC
AD7475
VDD
CONTROL
LOGIC
GND
SCLK
SDATA
CS
VDRIVE
VIN
REF OUT
T/H
BUF
2.5V
REFERENCE
AD7495
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
CONTROL
LOGIC
SCLK
SDATA
CS
VDRIVE
GND
Figure 1.
PRODUCT HIGHLIGHTS
1. The AD7475 offers 1 MSPS throughput rates with 4.5 mW
power consumption.
2. Single-supply operation with VDRIVE function. The
AD7475/AD7495 operate from a single 2.7 V to 5.25 V
supply. The VDRIVE function allows the serial interface to
connect directly to either 3 V or 5 V processor systems
independent of VDD.
3. 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. The devices also feature shutdown modes
to maximize power efficiency at lower throughput rates.
This allows the average power consumption to reduce while
not converting. Power consumption is 1 μA when in full
shutdown.
4. No pipeline delay. The devices feature a standard successive
approximation 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 ©2001-2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD7495 Datasheet

1 MSPS / 12-Bit ADCs

No Preview Available !

AD7475/AD7495
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
AD7475 Specifications ..................................................................... 3
AD7495 Specifications ..................................................................... 5
Timing Specifications....................................................................... 7
Timing Example 1 ........................................................................ 8
Timing Example 2 ........................................................................ 8
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Pin Configurations and Function Descriptions ......................... 10
Terminology .................................................................................... 11
Typical Performance Characteristics ........................................... 12
Theory of Operation ...................................................................... 13
REVISION HISTORY
7/15—Rev. B to Rev. C
Changes to Ordering Guide .......................................................... 24
5/05—Rev. A to Rev. B
Updated Format..................................................................Universal
Added Patent Information............................................................... 1
Updated Outline Dimensions ....................................................... 23
Changes to Ordering Guide .......................................................... 24
Data Sheet
Converter Operation.................................................................. 13
ADC Transfer Function............................................................. 13
Typical Connection Diagram ................................................... 14
Operating Modes............................................................................ 16
Normal Mode.............................................................................. 16
Partial Power-Down Mode ....................................................... 16
Full Power-Down Mode ............................................................ 17
Power vs. Throughput Rate....................................................... 19
Serial Interface ................................................................................ 20
Microprocessor Interfacing........................................................... 21
AD7475/AD7495 to TMS320C5X/C54X................................. 21
AD7475/AD7495 to ADSP-21xx.............................................. 21
AD7475/AD7495 to DSP56XXX ............................................... 22
AD7475/AD7495 to MC68HC16............................................. 22
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 24
Rev. C | Page 2 of 24


Part Number AD7495
Description 1 MSPS / 12-Bit ADCs
Maker Analog Devices
Total Page 24 Pages
PDF Download

AD7495 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 AD7490 12-Bit ADC
Analog Devices
2 AD7492 Evaluation Board for 12-bit high speed/ low power/ successive-approximation ADC
Analog Devices
3 AD7495 1 MSPS / 12-Bit ADCs
Analog Devices





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy