Datasheet > AD7457_05

AD7457_05

更新时间： 2024-11-23 12:50:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	538K
描述
Low Power, Pseudo Differential, 100 kSPS

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AD7457_05 数据手册

Low Power, Pseudo Differential, 100 kSPS

12-Bit ADC in an 8-Lead SOT-23

AD7457

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Specified for V_DDof 2.7 V to 5.25 V

Low power:

0.9 mW max at 100 kSPS with V_DD= 3 V

3 mW max at 100 kSPS with V_DD= 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

12-BIT

SUCCESSIVE

APPROXIMATION

ADC

IN+

T/H

–

REF

High speed serial interface—SPI®-/QSPI™-/

MICROWIRE™-/DSP-compatible

Automatic power-down mode

8-lead SOT-23 package

SCLK

SDATA

AD7457

CONTROL LOGIC

APPLICATIONS

Transducer interface

GND

Battery-powered systems

Data acquisition systems

Portable instrumentation

Figure 1.

GENERAL DESCRIPTION

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.

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.

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.

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 V_REFpin and can range from 100 mV to

V_DD, depending on what suits the application.

5. Variable voltage reference input.

6. No pipeline delays.

7. Accurate control of the sampling instant via the

and once-off conversion control.

8. ENOB > 10 bits typically with 500 mV reference.

The conversion process and data acquisition are controlled

using

and the serial clock, allowing the device to interface

input

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.

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

www.analog.com

12 3 4 5 6 7...20

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与AD7457_05相关器件

型号	品牌	获取价格	描述	数据表
AD7457BRM	ADI	获取价格	IC 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MICRO, SOIC-8, Analog t
AD7457BRT	ADI	获取价格	Low Power, Pseudo Differential, 100 kSPS 12-Bit ADC in an 8-Lead SOT-23
AD7457BRT-R2	ADI	获取价格	Low Power, Pseudo Differential, 100 kSPS 12-Bit ADC in an 8-Lead SOT-23
AD7457BRT-REEL	ADI	获取价格	IC 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, SOT-23, 8 PIN, Analog t
AD7457BRT-REEL7	ADI	获取价格	Low Power, Pseudo Differential, 100 kSPS 12-Bit ADC in an 8-Lead SOT-23
AD7457BRTZ-REEL7	ADI	获取价格	Low Power, Pseudo Differential, 100 kSPS 12-Bit ADC in an 8-Lead SOT-23
AD745AN	ADI	获取价格	Ultralow Noise, High Speed, BiFET Op Amp
AD745AN	ROCHESTER	获取价格	OP-AMP, 1500 uV OFFSET-MAX, 20 MHz BAND WIDTH, PDIP8, MINI, PLASTIC, DIP-8
AD745AQ	ADI	获取价格	IC OP-AMP, 1500 uV OFFSET-MAX, 20 MHz BAND WIDTH, CDIP8, CERDIP-8, Operational Amplifier
AD745AQ	ROCHESTER	获取价格	Operational Amplifier, 1 Func, 1500uV Offset-Max, BIPolar, CDIP8, CERDIP-8

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