Datasheet > AD7991

AD7991

更新时间： 2024-11-05 04:04:19

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
25页	259K
描述
4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23

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AD7991 数据手册

4-Channel, 12-/10-/8-Bit ADC with I²C-

Compatible Interface in 8-Lead SOT23

Preliminary Technical Data

AD7991/AD7995/AD7999

FEATURES

FUNCTIONAL BLOCK DIAGRAM

12-/10-/8-bit ADC with fast conversion time: 2 µs typ

4 Channel / 3 Channel with Reference input

Specified for V_DDof 2.7 V to 5.5 V

Sequencer operation

Temperature Range: -40 °C to 125 °C

I²C®-compatible serial interface supports standard, fast,

and High-speed modes

IN0

12-/10-/8-BIT

SAR

I/P

MUX

IN1

T/H

IN2

IN3/Vref

ADC

2 versions allow 2 I²C addresses

Low power consumption

Shutdown mode: 1 µA max

8-lead SOT23 package

CONTROL

LOGIC &

SCL

SDA

I C

INTERFACE

AD7991/7995/7999

APPLICATIONS

GND

Figure 1.

System Monitoring

Battery Powered Systems

Data Acquisition

Medical Instruments

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

The AD7991/AD7995/AD7999 are 12-/10-/8-bit, low power,

successive approximation ADCs with an I²C-compatible

interface. The parts operate from a single 2.7 V to 5.5 V power

supply and feature a 2 µs conversion time. The part contains a

4-channel multiplexer and track-and-hold amplifier that can

handle input frequencies up to 11 MHz.

1. 4 single ended analog input channels, with the option of

having 3 single ended analog input channels and 1

reference input channel.

2. I²C compatible serial Interface. Standard, Fast and Hs-

Modes

The AD7991/AD7995/AD7999 provides a 2-wire serial

interface compatible with I²C interfaces. The parts come in two

versions with each part having an individual I²C address. This

will allow two of the same devices be connected to the same I²C

bus. Both parts support standard, fast and high-speed I²C

interface modes

3. Automatic shutdown.

4. Reference derived from the power supply or external

reference.

5. 8-lead SOT23 Package.

Table 1 Related Devices

Device Number

Resolution

Input Channels

The AD7991/AD7995/AD7999 normally remain in a shutdown

state while not converting, and power up only for conversions.

The conversion process is controlled by a command mode,

where every time an I²C read operation is executed on the

AD7991/AD7995/AD7999, a conversion is performed and the

result is returned on the I²C bus.

AD7998

AD7997

AD7994

AD7993

AD7992

The reference for the part is taken from V_DD, this allows the

widest dynamic input range to the ADC. Thus the analog input

range to the ADC is 0V to V_DD. An external reference may also

be used with this part. The external reference may be applied

through the Ain3 input.

Rev. PrB

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 registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

12 3 4 5 6 7...25

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与AD7991相关器件

型号	品牌	获取价格	描述	数据表
AD7991_07	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2C-Compatible Interface in 8-Lead SOT-23
AD7991_09	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2C-Compatible Interface in 8-Lead SOT-23
AD7991_15	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with IC-Compatible Interface in 8-Lead SOT-23
AD7991BRJZ-0	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23
AD7991BRJZ-1	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23
AD7991YRJZ-0	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23
AD7991YRJZ-0500RL7	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2C-Compatible Interface in 8-Lead SOT-23
AD7991YRJZ-0RL	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2C-Compatible Interface in 8-Lead SOT-23
AD7991YRJZ-1	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23
AD7991YRJZ-1500RL7	ADI	获取价格	4-Channel, 12-/10-/8-Bit ADC with I2C-Compatible Interface in 8-Lead SOT-23

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