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| 型號： | AD7453ARTZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT DFF 600KSPS SOT23-8 |
| 設(shè)計(jì)資源： | Measuring -48 V High-Side Current Using AD629, AD8603, AD780, and AD7453 (CN0100) |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 555k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 7.25mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-8 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-8 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 輸入數(shù)目和類型： | 1 個(gè)偽差分，單極 |
| 其它名稱： | AD7453ARTZ-REEL7DKR |
Pseudo Differential, 555 kSPS
12-Bit ADC in an 8-Lead SOT-23
AD7453
Rev. B
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
2004 Analog Devices, Inc. All rights reserved.
FEATURES
Specified for VDD of 2.7 V to 5.25 V
Low power at max throughput rate:
3.3 mW max at 555 kSPS with VDD = 3 V
7.25 mW max at 555 kSPS with VDD = 5 V
Pseudo differential analog input
Wide input bandwidth:
70 dB SINAD at 100 kHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface:
SPI/QSPI/MICROWIRE/DSP compatible
Power-down mode: 1 A max
8-lead SOT-23 package
APPLICATIONS
Transducer interface
Battery-powered systems
Data acquisition systems
Portable instrumentation
GENERAL DESCRIPTION
The AD74531 is a 12-bit, high speed, low power, successive
approximation (SAR) analog-to-digital converter that features a
pseudo differential analog input. This part operates from a
single 2.7 V to 5.25 V power supply and features throughput
rates up to 555 kSPS.
The part contains a low noise, wide bandwidth, differential
track-and-hold amplifier (T/H) that can handle input frequen-
cies up to 3.5 MHz. The reference voltage for the AD7453 is
applied externally to the VREF pin and can range from 100 mV to
VDD, depending on the power supply and what suits the
application.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the device to interface
with microprocessors or DSPs. The input signals are sampled on
the falling edge of CS; the conversion is also initiated at this
point.
The SAR architecture of this part ensures that there are no
pipeline delays. The AD7453 uses advanced design techniques
to achieve very low power dissipation.
FUNCTIONAL BLOCK DIAGRAM
VREF
T/H
CONTROL LOGIC
12-BIT
SUCCESSIVE
ADC
GND
SCLK
SDATA
CS
VDD
AD7453
VIN+
VIN–
APPROXIMATION
03155-A
-001
Figure 1.
PRODUCT HIGHLIGHTS
1.
Operation with 2.7 V to 5.25 V Power Supplies.
2.
High Throughput with Low Power Consumption. With a
3 V supply, the AD7453 offers 3.3 mW max power
consumption for a 555 kSPS throughput rate.
3.
Pseudo Differential Analog Input.
4.
Flexible Power/Serial Clock Speed Management. The
conversion rate is determined by the serial clock, allowing
the power to be reduced as the conversion time is reduced
through the serial clock speed increase. This part also
features a shutdown mode to maximize power efficiency at
lower throughput rates.
5.
Variable Voltage Reference Input.
6.
No Pipeline Delay.
7.
Accurate control of the sampling instant via a CS input and
once-off conversion control.
8.
ENOB > 10 bits Typically with 500 mV Reference.
1Protected by U.S. Patent Number 6,681,332.
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