參數(shù)資料
型號(hào): ADCS7478
廠商: National Semiconductor Corporation
元件分類: 串行ADC
英文描述: 1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23
中文描述: 1MSPS,12/10/8位的A / D轉(zhuǎn)換器采用6引腳SOT - 23
文件頁數(shù): 1/22頁
文件大小: 514K
代理商: ADCS7478
ADCS7476/ADCS7477/ADCS7478
1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23
General Description
The ADCS7476, ADCS7477, and ADCS7478 are low power,
monolithic CMOS 12-, 10- and 8-bit analog-to-digital con-
verters that operate at 1 MSPS. The ADCS7476/77/78 are
drop-in replacements for Analog Devices’ AD7476/77/78.
Each device is based on a successive approximation regis-
ter architecture with internal track-and-hold. The serial inter-
face is compatible with several standards, such as SPI
,
QSPI
, MICROWIRE
, and many common DSP serial in-
terfaces.
The ADCS7476/77/78 uses the supply voltage as a refer-
ence. This enables the devices to operate with a full-scale
input range of 0 to V
DD
. The conversion rate is determined
from the serial clock (SCLK) speed. These converters offer a
shutdown mode, which can be used to trade throughput for
power consumption. The ADCS7476/77/78 is operated with
a single supply that can range from +2.7V to +5.25V. Normal
power consumption during continuous conversion, using a
+3V or +5V supply, is 2 mW or 10 mW respectively. The
power down feature, which is enabled by a chip select (CS)
pin, reduces the power consumption to under 5 μW using a
+5V supply. All three converters are packaged in a 6-lead,
SOT-23 package that provides an extremely small footprint
for applications where space is a critical consideration.
These products are designed for operation over the
automotive/extended industrial temperature range of 40C
to +125C.
Features
n
Variable power management
n
Packaged in 6-lead, SOT-23
n
Power supply used as reference
n
Single +2.7V to +5.25V supply operation
n
SPI
/QSPI
/MICROWIRE
/DSP compatible
Key Specifications
n
Resolution with no Missing Codes
n
Conversion Rate
n
DNL
n
INL
n
Power Consumption
12/10/8 bits
1 MSPS
+0.5, -0.3 LSB (typ)
±
0.4 LSB (typ)
3V Supply
5V Supply
2 mW (typ)
10 mW (typ)
Applications
n
Automotive Navigation
n
FA/ATM Equipment
n
Portable Systems
n
Medical Instruments
n
Mobile Communications
n
Instrumentation and Control Systems
Connection Diagram
20057701
MICROWIRE
is a trademark of National Semiconductor Corporation.
TRI-STATE
is a trademark of National Semiconductor Corporation.
QSPI
and SPI
are trademarks of Motorola, Inc.
June 2003
A
2003 National Semiconductor Corporation
DS200577
www.national.com
相關(guān)PDF資料
PDF描述
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