AD7923-EP ADC Datasheet

AD7923-EP Datasheet, PDF, Equivalent


Part Number

AD7923-EP

Description

200kSPS 12-Bit ADC

Manufacture

Analog Devices

Total Page 9 Pages
Datasheet
Download AD7923-EP Datasheet


AD7923-EP
Enhanced Product
4-Channel, 200 kSPS 12-Bit ADC
with Sequencer in 16-Lead TSSOP
AD7923-EP
FEATURES
Fast throughput rate: 200 kSPS
Specified for AVDD of 2.7 V to 5.25 V
Low power
3.6 mW max at 200 kSPS with 3 V supply
7.5 mW max at 200 kSPS with 5 V supply
4 (single-ended) inputs with sequencer
Wide input bandwidth
70 dB min SNR at 50 kHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-
compatible
Shutdown mode: 0.5 μA max
16-lead TSSOP package
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC standard)
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Product change notification
Qualification data available on request
APPLICATIONS
Aerospace and defense
Milcom
Avionics
Unmanned systems
GENERAL DESCRIPTION
The AD7923-EP is a 12-bit, high speed, low power, 4-channel,
successive approximation (SAR) ADC. It operates from a single
2.7 V to 5.25 V power supply and features throughput rates up to
200 kSPS. It contains a low noise, wide bandwidth track-and-hold
amplifier that can handle input frequencies in excess of 8 MHz.
The conversion process and data acquisition are controlled by
CS and the serial clock, allowing the device to easily interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS; the conversion is also initiated at this point.
The AD7923-EP uses advanced design techniques to achieve
very low power dissipation at maximum throughput rates. At
maximum throughput rates, it consumes 1.2 mA maximum with
3 V supplies and 1.5 mA maximum with 5 V supplies.
Through the configuration of the control register, the analog
input range can be selected as 0 V to REFIN or 0 V to 2 × REFIN,
with either straight binary or twos complement output coding.
Rev. A
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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.
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FUNCTIONAL BLOCK DIAGRAM
AV DD
REFIN
VIN0
VIN3
INPUT
MUX
T/H
SEQUENCER
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
CONTROL LOGIC
AD7923-EP
GND
Figure 1.
SCLK
DOUT
DIN
CS
VDRIVE
The AD7923-EP features four single-ended analog inputs with a
channel sequencer to allow a preprogrammed selection of channels
to be converted sequentially.
The serial clock (SCLK) frequency determines the conversion
time for the AD7923-EP because this is used as the master clock
to control the conversion. The conversion time can be as short
as 800 ns with a 20 MHz SCLK. Additional application and
technical information can be found in the AD7923 data sheet.
PRODUCT HIGHLIGHTS
1. High Throughput with Low Power Consumption. The
AD7923-EP offers up to 200 kSPS throughput rates. At the
maximum throughput rate with 3 V supplies, the AD7923-EP
dissipates just 3.6 mW of power.
2. Four Single-Ended Inputs with a Channel Sequencer.
3. Single-Supply Operation with VDRIVE Function. The VDRIVE
function allows the serial interface to connect directly to
either 3 V or 5 V processor systems independent of AVDD.
4. Flexible Power/Serial Clock Speed Management. The serial
clock determines the conversion rate, allowing the conversion
time to reduce through the serial clock speed increase. The
device also features various shutdown modes to maximize
power efficiency at lower throughput rates. Current
consumption is 0.5 μA maximum when in full shutdown.
5. No Pipeline Delay. The device features a SAR 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 ©2011–2018 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

AD7923-EP
AD7923-EP
TABLE OF CONTENTS
Features .............................................................................................. 1
Enhanced Product Features ............................................................ 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Specifications..................................................................................... 3
Timing Specifications .................................................................. 5
REVISION HISTORY
4/2018—Rev. 0 to Rev. A
Changes to Features Section............................................................ 1
Added Enhanced Product Features Section.................................. 1
Changes to Ordering Guide ............................................................ 9
10/2011—Revision 0: Initial Version
Enhanced Product
Absolute Maximum Ratings ............................................................6
ESD Caution...................................................................................6
Pin Configuration and Function Description ...............................7
Typical Performance Characteristics ..............................................8
Outline Dimensions ..........................................................................9
Ordering Guide .............................................................................9
Rev. A | Page 2 of 9


Features Enhanced Product 4-Channel, 200 kSPS 12 -Bit ADC with Sequencer in 16-Lead TSSO P AD7923-EP FEATURES Fast throughput r ate: 200 kSPS Specified for AVDD of 2.7 V to 5.25 V Low power 3.6 mW max at 20 0 kSPS with 3 V supply 7.5 mW max at 20 0 kSPS with 5 V supply 4 (single-ended) inputs with sequencer Wide input bandw idth 70 dB min SNR at 50 kHz input freq uency Flexible power/serial clock speed management No pipeline delays High spe ed serial interface SPI®-/QSPI™-/MIC ROWIRE™-/DSP- compatible Shutdown mod e: 0.5 μA max 16-lead TSSOP package EN HANCED PRODUCT FEATURES Supports defens e and aerospace applications (AQEC stan dard) Military temperature range (−55 °C to +125°C) Controlled manufacturin g baseline One assembly/test site One f abrication site Product change notifica tion Qualification data available on re quest APPLICATIONS Aerospace and defens e Milcom Avionics Unmanned systems GENE RAL DESCRIPTION The AD7923-EP is a 12-b it, high speed, low power, 4-channel, successive approximation (SAR) ADC..
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