AD7440BRMZ

更新时间： 2024-11-09 12:58:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
28页	770K
描述
Differential Input, 1 MSPS, 12- (AD7450A) & 10-Bit (AD7440) ADCs

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AD7440BRMZ 数据手册

Differential Input, 1 MSPS

10-Bit and 12-Bit ADCs in an 8-Lead SOT-23

AD7440/AD7450A

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Fast throughput rate: 1 MSPS

Specified for V_DDof 3 V and 5 V

Low power at max throughput rate:

4 mW max at 1 MSPS with 3 V supplies

9.25 mW max at 1 MSPS with 5 V supplies

Fully differential analog input

Wide input bandwidth:

IN+

12-BIT

SUCCESSIVE

APPROXIMATION

ADC

T/H

IN–

REF

70 dB SINAD at 100 kHz input frequency

Flexible power/serial clock speed management

No pipeline delays

SCLK

SDATA

High speed serial interface:

AD7440/AD7450A

CONTROL LOGIC

SPI®/QSPI™/MICROWIRE™/DSP compatible

Power-down mode: 1 µA max

8-lead SOT-23 and MSOP packages

GND

APPLICATIONS

Figure 1.

Transducer interface

Battery-powered systems

Data acquisition systems

Portable instrumentation

Motor control

on the falling edge of ; the conversion is also initiated at this

point. The SAR architecture of these parts ensures that there are

no pipeline delays. The AD7440 and the AD7450A use ad-

vanced design techniques to achieve very low power dissipation

at high throughput rates.

PRODUCT HIGHLIGHTS

GENERAL DESCRIPTION

The AD7440/AD7450A¹are 10-bit and 12-bit high speed, low

power, successive approximation (SAR) analog-to-digital

converters with a fully differential analog input. These parts

operate from a single 3 V or 5 V power supply and use advanced

design techniques to achieve very low power dissipation at

throughput rates up to 1 MSPS. The SAR architecture of these

parts ensures that there are no pipeline delays.

1. Operation with either 3 V or 5 V power supplies.

2. High throughput with low power consumption.

With a 3 V supply, the AD7440/AD7450A offer 4 mW

max power consumption for 1 MSPS throughput.

3. Fully 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. These

parts also feature a shutdown mode to maximize power

efficiency at lower throughput rates.

The parts contain a low noise, wide bandwidth, differential

track-and-hold amplifier (T/H) that can handle input

frequencies up to 3.5 MHz. The reference voltage is applied

externally to the V_REFpin and can be varied from 100 mV to

3.5 V depending on the power supply and what suits the

application. The value of the reference voltage determines the

common-mode voltage range of the part. With this truly

differential input structure and variable reference input, the user

can select a variety of input ranges and bias points.

5. Variable voltage reference input.

6. No pipeline delay.

7. Accurate control of the sampling instant via a

once-off conversion control.

input and

8. ENOB > eight bits typically with 100 mV reference.

The conversion process and data acquisition are controlled

using

and the serial clock, allowing the device to interface

with microprocessors or DSPs. The input signals are sampled

¹Protected by U.S. Patent Number 6,681,332.

Rev. B

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

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AD7440BRMZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7440BRM	ADI	完全替代	Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23
AD7440BRM-REEL7	ADI	类似代替	Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23

与AD7440BRMZ相关器件

型号	品牌	获取价格	描述	数据表
AD7440BRMZ2	ADI	获取价格	Differential Input, 1 MSPS ADCs in an 8-Lead SOT-23
AD7440BRT	ADI	获取价格	Differential Input, 1 MSPS ADCs in an 8-Lead SOT-23
AD7440BRT-R2	ADI	获取价格	Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23
AD7440BRT-REEL	ADI	获取价格	IC 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, SOT-23, 8 PIN, Analog t
AD7440BRT-REEL7	ADI	获取价格	Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23
AD7440BRTZ-R2	ROCHESTER	获取价格	1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, LEAD FREE, MO-178BA, SOT-2
AD7440BRTZ-R22	ADI	获取价格	Differential Input, 1 MSPS ADCs in an 8-Lead SOT-23
AD7440BRTZ-REEL7	ROCHESTER	获取价格	1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, LEAD FREE, MO-178BA, SOT-2
AD7440BRTZ-REEL72	ADI	获取价格	Differential Input, 1 MSPS ADCs in an 8-Lead SOT-23
AD7441	ADI	获取价格	Pseudo Differential, 1MSPS, 12- & 10-Bit ADCs in 8-lead SOT-23

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