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参数资料
型号： AD7478AAKSZ-REEL7
厂商： ANALOG DEVICES INC
元件分类： ADC
英文描述： GT 12C 6#12 6#16 SKT RECP WALL
中文描述： 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO6
封装： ROHS COMPLIANT, MO-203AB, SC-70, 6 PIN
文件页数： 1/24页
文件大小： 580K
代理商： AD7478AAKSZ-REEL7
REV. C
a
AD7476A/AD7477A/AD7478A
*
2.35 V to 5.25 V, 1 MSPS,
12-/10-/8-Bit ADCs in 6-Lead SC70
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
Tel: 781/329-4700
Fax: 781/326-8703
FEATURES
Fast Throughput Rate: 1 MSPS
Specified for V
DD
of 2.35 V to 5.25 V
Low Power:
3.6 mW Typ at 1 MSPS with 3 V Supplies
12.5 mW Typ at 1 MSPS with 5 V Supplies
Wide Input Bandwidth:
71 dB SNR at 100 kHz Input Frequency
Flexible Power/Serial Clock Speed Management
No Pipeline Delays
High Speed Serial Interface
SPI
/QSPI/MICROWIRE/DSP Compatible
Standby Mode: 1 A Max
6-Lead SC70 Package
8-Lead MSOP Package
APPLICATIONS
Battery-Powered Systems
Personal Digital Assistants
Medical Instruments
Mobile Communications
Instrumentation and Control Systems
Data Acquisition Systems
High Speed Modems
Optical Sensors
FUNCTIONAL BLOCK DIAGRAM
12-/10-/8-BIT
SUCCESSIVE-
APPROXIMATION
ADC
CONTROL
LOGIC
AD7476A/AD7477A/AD7478A
GND
V
DD
V
IN
SCLK
SDATA
CS
T/H
GENERAL DESCRIPTION
The AD7476A/AD7477A/AD7478A are 12-bit, 10-bit, and 8-bit
high speed, low power, successive-approximation ADCs, respec-
tively. The parts operate from a single 2.35 V to 5.25 V power
supply and feature throughput rates up to 1 MSPS. The parts
contain a low noise, wide bandwidth track-and-hold amplifier
that can handle input frequencies in excess of 13 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 the conversion is also initiated at this point.
There are no pipeline delays associated with the parts.
The AD7476A/AD7477A/AD7478A use advanced design tech-
niques to achieve low power dissipation at high throughput rates.
The reference for the part is taken internally from V
DD
,
which
allows the widest dynamic input range to the ADC. Thus, the
analog input range for the part is 0 to V
DD
. The conversion rate is
determined by the SCLK.
PRODUCT HIGHLIGHTS
1. First 8-/10-/12-bit ADCs in an SC70 package.
2. High throughput with low power consumption.
3. Flexible power/serial clock speed management. The conversion
rate is determined by the serial clock, allowing the conver-
sion time to be reduced through the serial clock speed increase.
This allows the average power consumption to be reduced
when a power-down mode is used while not converting. The
parts also feature a power-down mode to maximize power
efficiency at lower throughput rates. Current consumption is
1
μ
A max and 50 nA typically when in power-down mode.
4. Reference derived from the power supply.
5. No pipeline delay. The parts feature a standard successive-
approximation ADC with accurate control of the sampling
instant via a
CS
input and once-off conversion control.
*
Protected by U.S.Patent No. 6,681,332.
相关PDF资料
PDF描述
AD7476AYKSZ-REEL7 2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70
AD7476SRTZ-R2 PTSE 11C 11#16 STR PLUG
AD7476ART-500RL7 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SOT-23
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