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EVAL-CONTROL-BRD2 Datasheet(PDF) 1 Page - Analog Devices

Part # EVAL-CONTROL-BRD2
Description  4-Channel, 1.5 MSPS, 10-Bit and 12-Bit Parallel ADCs with a Sequencer
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

EVAL-CONTROL-BRD2 Datasheet(HTML) 1 Page - Analog Devices

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4-Channel, 1.5 MSPS, 10-Bit and 12-Bit
Parallel ADCs with a Sequencer
AD7933/AD7934
Rev. B
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
©2005–2007 Analog Devices, Inc. All rights reserved.
FEATURES
Throughput rate: 1.5 MSPS
Specified for VDD of 2.7 V to 5.25 V
Low power
6 mW maximum at 1.5 MSPS with 3 V supplies
13.5 mW maximum at 1.5 MSPS with 5 V supplies
4 analog input channels with a sequencer
Software configurable analog inputs
4-channel single-ended inputs
2-channel fully differential inputs
2-channel pseudo differential inputs
Accurate on-chip 2.5 V reference
±0.2% maximum @ 25°C, 25 ppm/°C maximum (AD7934)
70 dB SINAD at 50 kHz input frequency
No pipeline delays
High speed parallel interface—word/byte modes
Full shutdown mode: 2 μA maximum
28-lead TSSOP package
FUNCTIONAL BLOCK DIAGRAM
VIN3
T/H
PARALLEL INTERFACE/CONTROL REGISTER
SEQUENCER
12-/10-BIT
SAR ADC
AND
CONTROL
I/P
MUX
2.5V
VREF
DB0 DB11
VDRIVE
VDD
AD7933/AD7934
VIN0
AGND
VREFIN/
VREFOUT
CLKIN
BUSY
CONVST
CS
DGND
RD WR W/B
Figure 1.
GENERAL DESCRIPTION
The AD7933/AD7934 are 10-bit and 12-bit, high speed, low
power, successive approximation (SAR) analog-to-digital
converters (ADCs). The parts operate from a single 2.7 V to
5.25 V power supply and feature throughput rates up to 1.5 MSPS.
The parts contain a low noise, wide bandwidth, differential track-
and-hold amplifier that handles input frequencies up to 50 MHz.
The AD7933/AD7934 feature four analog input channels with a
channel sequencer that allows a preprogrammed selection of
channels to be sequentially converted. These parts can accept
either single-ended, fully differential, or pseudo differential
analog inputs.
The conversion process and data acquisition are controlled
using standard control inputs that allow for easy interfacing to
microprocessors and DSPs. The input signal is sampled on the
falling edge of CONVST, and the conversion is also initiated at
this point.
The AD7933/AD7934 has an accurate on-chip 2.5 V reference
that is used as the reference source for the analog-to-digital
conversion. Alternatively, this pin can be overdriven to provide
an external reference.
These parts use advanced design techniques to achieve very low
power dissipation at high throughput rates. They also feature
flexible power management options. An on-chip control
register allows the user to set up different operating conditions,
including analog input range and configuration, output coding,
power management, and channel sequencing.
PRODUCT HIGHLIGHTS
1.
High throughput with low power consumption.
2.
Four analog inputs with a channel sequencer.
3.
Accurate on-chip 2.5 V reference.
4.
Single-ended, pseudo differential or fully differential
analog inputs that are software selectable.
5.
Single-supply operation with VDRIVE function.
The VDRIVE function allows the parallel interface to connect
directly to 3 V or 5 V processor systems independent of VDD.
6.
No pipeline delay.
7.
Accurate control of the sampling instant via a CONVST
input and once-off conversion control.
Table 1. Related Devices
Device
No. of Bits
No. of Channels
Speed
AD7938/AD7939
12/10
8
1.5 MSPS
AD7938-6
12
8
625 kSPS
AD7934-6
12
4
625 kSPS


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