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| 型號： | AD7457BRTZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT PSEUDO-DIFF SOT23-8 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 100k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 3mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-8 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-8 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 輸入數(shù)目和類型： | 1 個偽差分，雙極 |
| 產(chǎn)品目錄頁面： | 777 (CN2011-ZH PDF) |
| 其它名稱： | AD7457BRTZ-REEL7DKR |
Low Power, Pseudo Differential, 100 kSPS
12-Bit ADC in an 8-Lead SOT-23
AD7457
Rev. A
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.
Specifications subject to change without notice. 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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2005 Analog Devices, Inc. All rights reserved.
FEATURES
Specified for VDD of 2.7 V to 5.25 V
Low power:
0.9 mW max at 100 kSPS with VDD = 3 V
3 mW max at 100 kSPS with VDD = 5 V
Pseudo differential analog input
Wide input bandwidth:
70 dB SINAD at 30 kHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface—SPI-/QSPI-/
MICROWIRE-/DSP-compatible
Automatic power-down mode
8-lead SOT-23 package
APPLICATIONS
Transducer interface
Battery-powered systems
Data acquisition systems
Portable instrumentation
FUNCTIONAL BLOCK DIAGRAM
VREF
T/H
CONTROL LOGIC
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
GND
SCLK
SDATA
CS
VDD
AD7457
VIN+
VIN–
03157-0-013
Figure 1.
GENERAL DESCRIPTION
The AD7457 is a 12-bit, low power, successive approximation
(SAR) analog-to-digital converter that features a pseudo
differential analog input. This part operates from a single 2.7 V
to 5.25 V power supply and features throughput rates of up to
100 kSPS.
The part contains a low noise, wide bandwidth, differential
track-and-hold (T/H) amplifier that can handle input frequen-
cies in excess of 1 MHz. The reference voltage for the AD7457 is
applied externally to the VREF pin and can range from 100 mV to
VDD, depending on what suits the application.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the device to interface
with microprocessors or DSPs. The SAR architecture of this
part ensures that there are no pipeline delays.
The AD7457 uses advanced design techniques to achieve very
low power dissipation.
PRODUCT HIGHLIGHTS
1.
Operation with 2.7 V to 5.25 V power supplies.
2.
Low power consumption. With a 3 V supply, the AD7457
offers 0.9 mW maximum power consumption for a
100 kSPS throughput rate.
3.
Pseudo differential analog input.
4.
Flexible power/serial clock speed management. The
conversion rate is determined by the serial clock, allowing
the power to be reduced as the conversion time is reduced
through the serial clock speed increase. Automatic power-
down after conversion allows the average power consump-
tion to be reduced.
5.
Variable voltage reference input.
6.
No pipeline delays.
7.
Accurate control of the sampling instant via the CS input
and once-off conversion control.
8.
ENOB > 10 bits typically with 500 mV reference.
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| AD745AN | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultralow Noise, High Speed, BiFET Op Amp |
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| AD745AR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Operational Amplifier |
| AD745BQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD745JN | 制造商:Rochester Electronics LLC 功能描述:ULTRA-LOW NOISE OP-AMP IC - Bulk 制造商:Analog Devices 功能描述: |
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