DataSheetWiki


AD7658-1 fiches techniques PDF

Analog Devices - 16-/14-/12-Bit ADC

Numéro de référence AD7658-1
Description 16-/14-/12-Bit ADC
Fabricant Analog Devices 
Logo Analog Devices 





1 Page

No Preview Available !





AD7658-1 fiche technique
Data Sheet
250 kSPS, 6-Channel, Simultaneous
Sampling, Bipolar, 16-/14-/12-Bit ADC
AD7656-1/AD7657-1/AD7658-1
FEATURES
Pin and software compatible with AD7656/AD7657/AD7658
featuring reduced decoupling requirements
6 independent ADCs
True bipolar analog inputs
Pin-/software-selectable ranges: ±10 V, ±5 V
Fast throughput rate: 250 kSPS
iCMOS process technology
Low power
140 mW at 250 kSPS with 5 V supplies
High noise performance with wide bandwidth
88 dB SNR at 10 kHz input frequency
On-chip reference and reference buffers
High speed parallel, serial, and daisy-chain interface modes
High speed serial interface
SPI/QSPI™/MICROWIRE™/DSP compatible
Standby mode: 315 µW maximum
64-lead LQFP
APPLICATIONS
Power line monitoring and measuring systems
Instrumentation and control systems
Multiaxis positioning systems
GENERAL DESCRIPTION
The AD7656-1/AD7657-1/AD7658-11 are reduced decoupling pin-
and software-compatible versions of AD7656/AD7657/AD7658.
The AD7656-1/AD7657-1/AD7658-1 devices contain six 16-/
14-/12-bit, fast, low power successive approximation ADCs in
a package designed on the iCMOS® process (industrial CMOS).
iCMOS is a process combining high voltage silicon with submicron
CMOS and complementary bipolar technologies. It enables the
development of a wide range of high performance analog ICs
capable of 33 V operation in a footprint that no previous generation
of high voltage parts could achieve. Unlike analog ICs using conven-
tional CMOS processes, iCMOS components can accept bipolar
input signals while providing increased performance, which
dramatically reduces power consumption and package size.
The AD7656-1/AD7657-1/AD7658-1 feature throughput rates
of up to 250 kSPS. The parts contain low noise, wide bandwidth
track-and-hold amplifiers that can handle input frequencies
up to 4.5 MHz.
FUNCTIONAL BLOCK DIAGRAM
VDD CONVST A CONVST B CONVST C AVCC DVCC
REF
CLK
OSC
CONTROL
LOGIC
V1 T/H
BUF
16-/14-/
12-BIT SAR
OUTPUT
DRIVERS
CS
SER/PAR SEL
VDRIVE
STBY
DB8/DOUT A
V2 T/H
V3 T/H
BUF
16-/14-/
12-BIT SAR
16-/14-/
12-BIT SAR
OUTPUT
DRIVERS
OUTPUT
DRIVERS
DB6/SCLK
DB9/DOUT B
DB10/DOUT C
V4 T/H
V5 T/H
V6 T/H
BUF
16-/14-/
12-BIT SAR
16-/14-/
12-BIT SAR
OUTPUT
DRIVERS
DATA/
CONTROL
LINES
RD
16-/14-/
12-BIT SAR
AD7656-1/AD7657-1/AD7658-1
WR/REFEN/DIS
VSS AGND DGND
Figure 1.
The conversion process and data acquisition are controlled
using the CONVST signals and an internal oscillator. Three
CONVST pins (CONVST A, CONVST B, and CONVST C)
allow independent, simultaneous sampling of the three ADC
pairs. The AD7656-1/AD7657-1/AD7658-1 have a high speed
parallel and serial interface, allowing the devices to interface with
microprocessors or DSPs. When the serial interface is selected,
each part has a daisy-chain feature that allows multiple ADCs to
connect to a single serial interface. The AD7656-1/AD7657-1/
AD7658-1 can accommodate true bipolar input signals in the
±4 × VREF and ±2 × VREF ranges. Each AD7656-1/AD7657-1/
AD7658-1 also contains an on-chip 2.5 V reference.
PRODUCT HIGHLIGHTS
1. Six 16-/14-/12-bit, 250 kSPS ADCs on board.
2. Six true bipolar, high impedance analog inputs.
3. High speed parallel and serial interfaces.
4. Reduced decoupling requirements and reduced bill of
materials cost compared with the AD7656/AD7657/
AD7658 devices.
1 Protected by U.S. Patent No. 6,731,232.
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
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 ©2008–2012 Analog Devices, Inc. All rights reserved.

PagesPages 30
Télécharger [ AD7658-1 ]


Fiche technique recommandé

No Description détaillée Fabricant
AD7658-1 16-/14-/12-Bit 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