DataSheetWiki


AD7482 fiches techniques PDF

Analog Devices - 3MSPS/ 12-Bit SAR ADC

Numéro de référence AD7482
Description 3MSPS/ 12-Bit SAR ADC
Fabricant Analog Devices 
Logo Analog Devices 





1 Page

No Preview Available !





AD7482 fiche technique
7/5/01 5 PM
PRELIMINARY TECHNICAL DATA
=
3MSPS,
12-Bit SAR ADC
Preliminary Technical Data
AD7482
FEATURES
Fast Throughput Rate: 3MSPS
Wide Input Bandwidth: 50MHz
No Pipeline Delays with SAR ADC
Excellent DC Accuracy Performance
Two Parallel Interface Modes
Low Power:
90mW (Full-Power) and 5mW (NAP Mode)
Standby Mode: 1µA max
Single +5V Supply Operation
Internal +2.5V Reference
Full-Scale Overrange Mode (using 13th bit)
System Offset Removal via User Access Offset Register
Nominal 0 to +2.5V Input with Shifted Range Capability
14-Bit Pin Compatible Upgrade (AD7484)
GENERAL DESCRIPTION
The AD7482 is a 12-bit, high speed, low power, succes-
sive-approximation ADC. The part features a parallel
interface with throughput rates of up to 3MSPS. The part
contains a low-noise, wide bandwidth track/hold amplifier
which can handle input frequencies in excess of 50MHz.
The conversion process is a proprietary algorithmic suc-
cessive-approximation technique which results in no
pipeline delays. The input signal is sampled and a conver-
sion is initiated on the falling edge of a CONVST signal.
The conversion process is controlled via an internally
trimmed oscillator. Interfacing is via standard parallel
signal lines making the part directly compatible with
microcontrollers and DSPs.
The AD7482 provides excellent ac and dc performance
specifications. Factory trimming ensures high dc accuracy
resulting in very low INL, offset and gain errors.
The part uses advanced design techniques to achieve very
low power dissipation at high throughput rates. Power
consumption in normal mode of operation is 90mW.
There are two power-saving modes: a NAP mode, which
keeps the reference circuitry alive for a quick power up
while consuming 5mW and a STANDBY mode which
reduces power consumption to a mere 5µW.
FUNCTIONAL BLOCK DIAGRAM
VREF3
AVDD AGND CBIAS DVDD DGND
BUF
2.5V
REFERENCE
VREF1
VREF2
VIN T/H
12-Bit Error
Correcting SAR
AD7482
MODE1
MODE2
CLIP
NAP
STBY
RESET
CONVST
VDRIVE
CONTROL
LOGIC AND I/O
REGISTERS
D12
D11
D10
D9
D8
D7
The AD7482 features an on-board +2.5V reference but
the part can also accomodate an externally provided
+2.5V reference source. The nominal analog input range
is 0 to +2.5V but an offset shift capability allows this
nominal range to be offset by +/-200mV. This allows the
user considerable flexibility in setting the bottom end
reference point of the signal range, a useful feature when
using single-supply op-amps.
The AD7482 also provides the user with an 8% overrange
capability via a 13th bit. Thus, if the analog input range
strays outside the nominal by up to 8%, the user can still
accurately resolve the signal by using the 13th bit.
The AD7482 is powered from a +4.75V to +5.25V sup-
ply. The part also provides a VDRIVE pin which allows the
user to set the voltage levels for the digital interface lines.
The range for this VDRIVE pin is from +2.7V to +5.25V.
The part is housed in a 48-pin LQFP package and is
specified over a -40°C to +85°C temperature range.
REV. PrC
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001

PagesPages 12
Télécharger [ AD7482 ]


Fiche technique recommandé

No Description détaillée Fabricant
AD7482 3MSPS/ 12-Bit SAR ADC Analog Devices
Analog Devices
AD7484 3MSPS/ 14-Bit SAR ADC Analog Devices
Analog Devices
AD7485 Serial 14-Bit SAR ADC Analog Devices
Analog Devices

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche