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AD7997 датащи(PDF) 1 Page - Analog Devices

номер детали AD7997
подробное описание детали  8-Channel, 10- and 12-Bit ADCs with IC Compatible Interface in 20-Lead TSSOP
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домашняя страница  http://www.analog.com
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AD7997 датащи(HTML) 1 Page - Analog Devices

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8-Channel, 10- and 12-Bit ADCs with I2C-
Compatible Interface in 20-Lead TSSOP
AD7997/AD7998
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
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
FEATURES
10- and 12-bit ADC with fast conversion time: 2 µs typ
8 single-ended analog input channels
Specified for VDD of 2.7 V to 5.5 V
Low power consumption
Fast throughput rate: up to 188 kSPS
Sequencer operation
Automatic cycle mode
I2C®-compatible serial interface supports standard, fast,
and high speed modes
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
See the AD7992 and AD7994 for 2-channel and 4-channel
equivalent devices, respectively
GENERAL DESCRIPTION
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.
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.
The AD7997/AD7998 normally remain in a shutdown state
while not converting, and power up only for conversions. The
conversion process can be controlled using the CONVST pin,
by a command mode where conversions occur across I2C write
operations or an automatic conversion interval mode selected
through software control.
The AD7997/AD7998 require an external reference that should
be applied to the REFIN pin and can be in the range of 1.2 V to
VDD. This allows the widest dynamic input range to the ADC.
FUNCTIONAL BLOCK DIAGRAM
VIN1
10-/12-BIT
SUCCESSIVE
APPROXIMATION
ADC
CONTROL
LOGIC
8:1
I/P
MUX
AD7997/AD7998
VDD
SCL
I2C INTERFACE
CYCLE TIMER
REGISTER
ALERT STATUS
REGISTER
CONFIGURATION
REGISTER
CONVERSION
RESULT
REGISTER
SDA
AGND
ALERT/BUSY
CONVST
AGND
AS
OSCILLATOR
REFIN
VIN8
DATALOWLIMIT
REGISTER CH1–CH4
T/H
DATAHIGHLIMIT
REGISTER CH1–CH4
HYSTERESIS
REGISTER CH1–CH4
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.
PRODUCT HIGHLIGHTS
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.
4.
Reference can be driven up to the power supply.
5.
Out-of-range indicator that can be software disabled or
enabled.
6.
One-shot and automatic conversion rates.
7.
Registers store minimum and maximum conversion
results.


Аналогичный номер детали - AD7997_15

производительномер деталидатащиподробное описание детали
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Analog Devices
AD7997BRU-0 AD-AD7997BRU-0 Datasheet
1Mb / 32P
   8-Channel, 10- and 12-Bit ADCs with I2CCompatible
REV. 0
AD7997BRU-0REEL AD-AD7997BRU-0REEL Datasheet
1Mb / 32P
   8-Channel, 10- and 12-Bit ADCs with I2CCompatible
REV. 0
AD7997BRU-1 AD-AD7997BRU-1 Datasheet
1Mb / 32P
   8-Channel, 10- and 12-Bit ADCs with I2CCompatible
REV. 0
AD7997BRU-1REEL AD-AD7997BRU-1REEL Datasheet
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   8-Channel, 10- and 12-Bit ADCs with I2CCompatible
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AD7997BRUZ-03 AD-AD7997BRUZ-03 Datasheet
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Аналогичное описание - AD7997_15

производительномер деталидатащиподробное описание детали
logo
Analog Devices
AD7998 AD-AD7998_15 Datasheet
1Mb / 32P
   8-Channel, 10- and 12-Bit ADCs with IC Compatible Interface in 20-Lead TSSOP
REV. 0
AD7993 AD-AD7993_15 Datasheet
1Mb / 32P
   4-Channel, 10- and 12-Bit ADCs with IC Compatible Interface in 16-Lead TSSOP
REV. 0
AD7994 AD-AD7994_15 Datasheet
1Mb / 32P
   4-Channel, 10- and 12-Bit ADCs with IC Compatible Interface in 16-Lead TSSOP
REV. 0
AD7993 AD-AD7993 Datasheet
693Kb / 32P
   4-Channel, 10- and 12-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP
REV. 0
AD7994 AD-AD7994 Datasheet
277Kb / 27P
   4-Channel, 12-/10-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP
REV. PrF 09/03
AD7918 AD-AD7918_15 Datasheet
557Kb / 28P
   8-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 20-Lead TSSOP
Rev. E
AD7928BRUZ AD-AD7928BRUZ Datasheet
456Kb / 32P
   8-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 20-Lead TSSOP
REV. D
AD7908 AD-AD7908 Datasheet
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   8-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 20-Lead TSSOP
REV. A
AD7908 AD-AD7908_15 Datasheet
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   8-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 20-Lead TSSOP
Rev. E
AD7928 AD-AD7928_15 Datasheet
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