Datasheet > EVAL-AD7994CB

EVAL-AD7994CB

更新时间： 2024-11-24 05:20:43

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	690K
描述
4-Channel, 10- and 12-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP

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EVAL-AD7994CB 数据手册

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

Compatible Interface in 16-Lead TSSOP

AD7993/AD7994

FEATURES

FUNCTIONAL BLOCK DIAGRAM

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

4 single-ended analog input channels

Specified for V_DDof 2.7 V to 5.5 V

Low power consumption

Fast throughput rate: 188 kSPS

Temperature range:−40°C to +125°C

Sequencer operation

AGND

REF

CONVST

AD7993/AD7994

10-/12-BIT

SUCCESSIVE

APPROXIMATION

ADC

CONTROL

LOGIC

T/H

I/P

MUX

OSCILLATOR

Automatic cycle interval mode

I²C®-compatible serial interface

I²C interface supports standard, fast, and high speed modes

Out-of-range indicator/alert function

Pin-selectable addressing via AS

Shutdown mode: 1 µA max

CONVERSION

RESULT

DATA

LIMIT

LOW

CONFIGURATION

ALERT/

BUSY

DATA

LIMIT

HIGH

ALERT STATUS

16-lead TSSOP package

See AD7998 and AD7992 for 8-channel and 2-channel

equivalent devices, respectively.

HYSTERESIS

CYCLE TIMER

SCL

SDA

I C INTERFACE

GENERAL DESCRIPTION

AGND

The AD7993/AD7994 are 4-channel, 10- and 12-bit, low power,

successive approximation ADCs with an I²C-compatible inter-

face. 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 a

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

handle input frequencies up to 11 MHz.

Figure 1.

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.

The AD7993/AD7994 provide a 2-wire serial interface that is

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

AD7993-0/AD7994-0 and AD7993-1/AD7994-1, and each

version allows for at least two different I²C addresses. The I²C

interface on the AD7993-0/AD7994-0 supports standard and

fast I²C interface modes. The I²C interface on the AD7993-1/

AD7994-1 supports standard, fast, and high speed I²C interface

modes.

PRODUCT HIGHLIGHTS

1. 2 µs conversion time with low power consumption.

2. I²C-compatible serial interface with pin-selectable

addresses. Two AD7993/AD7994 versions allow five

AD7993/AD7994 devices to be connected to the same

serial bus.

The AD7993/AD7994 normally remain in a shutdown state

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

3. The parts feature automatic shutdown while not converting

to maximize power efficiency. Current consumption is

1 µA max when in shutdown mode.

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.

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

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

enabled.

The AD7993/AD7994 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.

6. One-shot and automatic conversion rates.

7. Registers can 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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与EVAL-AD7994CB相关器件

型号	品牌	获取价格	描述	数据表
EVAL-AD7997_15	ADI	获取价格	Evaluation Board for the 8-Channel, 10-/12-Bit ADC with I2C-Compatible Interface
EVAL-AD7998_15	ADI	获取价格	Evaluation Board for the 8-Channel, 10-/12-Bit ADC with I2C-Compatible Interface
EVAL-AD7998EBZ	ADI	获取价格	BOARD EVAL FOR AD7998
EVAL-AD79X8CBZ	ADI	获取价格	8-Channel, 1 MSPS, 8-/10-/12-Bit ADCs
EVAL-AD8332/AD9238	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
EVAL-AD8403SDZ	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
EVAL-AD9388AFEZ_1	ADI	获取价格	10-Bit Integrated, Multiformat, HDTV Video Decoder, RGB Graphics Digitizer, and 2:1 Multip
EVAL-AD9388AFEZ_2	ADI	获取价格	10-Bit Integrated, Multiformat, HDTV Video Decoder, RGB Graphics Digitizer, and 2:1 Multip
EVAL-AD9388AFEZ_3	ADI	获取价格	10-Bit Integrated, Multiformat, HDTV Video Decoder, RGB Graphics Digitizer, and 2:1 Multip
EVAL-AD9831EB	ADI	获取价格	CMOS Complete DDS

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