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| 型號(hào)： | EVAL-AD7298SDZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 1/25頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7298 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | DSP，串行，SPI? |
| 工作溫度： | -40°C ~ 125°C |
| 已用 IC / 零件： | AD7298 |
| 已供物品： | 板，纜線，CD |
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8-Channel, 1 MSPS, 12-Bit SAR ADC
with Temperature Sensor
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2010–2011 Analog Devices, Inc. All rights reserved.
FEATURES
12-bit SAR ADC
8 single-ended inputs
Channel sequencer functionality
Fast throughput of 1 MSPS
Analog input range: 0 V to 2.5 V
12-bit temperature-to-digital converter
Temperature sensor accuracy of ±1°C
Temperature range: 40°C to +125°C
Specified for VDD: 2.8 V to 3.6 V
Logic voltage VDRIVE : 1.65 V to 3.6 V
Power-down current: <10 μA
Internal 2.5 V reference
Internal power-on reset
High speed serial interface SPI
20-lead LFCSP
GENERAL DESCRIPTION
The AD7298 is a 12-bit, high speed, low power, 8-channel,
successive approximation ADC with an internal temperature
sensor. The part operates from a single 3.3 V power supply and
features throughput rates up to 1 MSPS. The device contains a
low noise, wide bandwidth track-and-hold amplifier that can
handle input frequencies in excess of 30 MHz.
The AD7298 offers a programmable sequencer, which enables
the selection of a preprogrammable sequence of channels for
conversion. The device has an on-chip, 2.5 V reference that can
be disabled to allow the use of an external reference.
The AD7298 includes a high accuracy band gap temperature
sensor, which is monitored and digitized by the 12-bit ADC to
give a resolution of 0.25°C. The device offers a 4-wire serial
interface compatible with SPI and DSP interface standards.
The AD7298 uses advanced design techniques to achieve very
low power dissipation at high throughput rates. The part also
offers flexible power/throughput rate management options.
The part is offered in a 20-lead LFCSP package.
FUNCTIONAL BLOCK DIAGRAM
TEMP
SENSOR
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
INPUT
MUX
T/H
VDD
GND
PD/RST
SCLK
DOUT
DIN
CS
VDRIVE
VIN7
VIN0
CONTROL
LOGIC
SEQUENCER
VREF
BUF
REF
AD7298
08
75
4-
0
1
TSENSE_BUSY
Figure 1.
PRODUCT HIGHLIGHTS
1.
Ideally Suited to Monitoring System Variables in a Variety
of Systems. This includes telecommunications, and process
and industrial control.
2.
High Throughput Rate of 1 MSPS with Low Power
Consumption.
3.
Eight Single-Ended Inputs with a Channel Sequencer.
A consecutive sequence of channels can be selected on
which the ADC cycles and converts.
4.
Integrated Temperature Sensor with 0.25°C Resolution.
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