Datasheet > AD7997BRU-1

AD7997BRU-1

更新时间： 2024-09-15 22:27:55

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	1434K
描述
8-Channel, 10- and 12-Bit ADCs with I2CCompatible

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替代型号

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AD7997BRU-1 数据手册

8-Channel, 10- and 12-Bit ADCs with I²C-

Compatible Interface in 20-Lead TSSOP

AD7997/AD7998

FEATURES

FUNCTIONAL BLOCK DIAGRAM

AGND

REF

CONVST

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

8 single-ended analog input channels

Specified for V_DDof 2.7 V to 5.5 V

Low power consumption

Fast throughput rate: up to 188 kSPS

Sequencer operation

AD7997/AD7998

10-/12-BIT

SUCCESSIVE

APPROXIMATION

ADC

CONTROL

LOGIC

T/H

8:1

I/P

MUX

OSCILLATOR

Automatic cycle mode

I²C®-compatible serial interface supports standard, fast,

and high speed modes

CONVERSION

RESULT

DATA

LIMIT

LOW

Out-of-range indicator/alert function

Pin-selectable addressing via AS

Shutdown mode: 1 µA max

Temperature range: −40°C to +85°C

20-lead TSSOP package

CONFIGURATION

ALERT/BUSY

DATA

HIGH

LIMIT

ALERT STATUS

HYSTERESIS

CYCLE TIMER

See the AD7992 and AD7994 for 2-channel and 4-channel

equivalent devices, respectively

SCL

SDA

I C INTERFACE

AGND

GENERAL DESCRIPTION

Figure 1.

The AD7997/AD7998 are 8-channel, 10- and 12-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 parts contain an

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

handle input frequencies up to 11 MHz.

On-chip limit registers can be programmed with high and

low limits for the conversion result, and an open-drain, out-of-

range indicator output (ALERT) becomes active when the

programmed high or low limits are violated by the conversion

result. This output can be used as an interrupt.

PRODUCT HIGHLIGHTS

The AD7997/AD7998 provide a 2-wire serial interface that is

compatible with I²C interfaces. Each part comes in two versions,

AD7997-0/AD7998-0 and AD7997-1/AD7998-1, and each

version allows at least two different I²C addresses. The I²C

interface on the AD7997-0/AD7998-0 supports standard and

fast I²C interface modes. The I²C interface on the AD7997-1/

AD7998-1 supports standard, fast, and high speed I²C interface

modes.

1. 2 µs conversion time with low power consumption.

2. I²C-compatible serial interface with pin-selectable

addresses. Two AD7997/AD7998 versions allow five

AD7997/AD7998 devices to be connected to the same

serial bus.

3. The parts feature automatic shutdown while not converting

to maximize power efficiency. Current consumption is 1 µA

max when in shutdown mode at 3V.

The AD7997/AD7998 normally remain in a shutdown state

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

4. Reference can be driven up to the power supply.

conversion process can be controlled using the

pin,

CONVST

by a command mode where conversions occur across I²C write

operations or an automatic conversion interval mode selected

through software control.

5. Out-of-range indicator that can be software disabled or

enabled.

6. One-shot and automatic conversion rates.

The AD7997/AD7998 require an external reference that should

be applied to the REF_INpin and can be in the range of 1.2 V to

V_DD. This allows the widest dynamic input range to the ADC.

7. Registers store minimum and maximum conversion

results.

Rev. 0

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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AD7997BRU-1 替代型号

型号	品牌	替代类型	描述	数据表
AD7997BRU-1REEL	ADI	完全替代	8-Channel, 10- and 12-Bit ADCs with I2CCompatible

与AD7997BRU-1相关器件

型号	品牌	获取价格	描述	数据表
AD7997BRU-1REEL	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with I2CCompatible
AD7997BRUZ-0	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, LEAD FREE, MO-153-AC, TSS
AD7997BRUZ-03	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with I2CCompatible
AD7997BRUZ-0REEL	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, LEAD FREE, MO-153-AC, TSS
AD7997BRUZ-0REEL3	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with I2CCompatible
AD7997BRUZ-1	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, LEAD FREE, MO-153-AC, TSS
AD7997BRUZ-13	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with I2CCompatible
AD7997BRUZ-1REEL3	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with I2CCompatible
AD7998	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with I2CCompatible
AD7998_15	ADI	获取价格	8-Channel, 10- and 12-Bit ADCs with IC Compatible Interface in 20-Lead TSSOP

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