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ADCS7478

National Semiconductor
Part Number ADCS7478
Manufacturer National Semiconductor
Description 1MSPS/ 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23
Published Mar 24, 2005
Detailed Description ADCS7476/ADCS7477/ADCS7478 1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 June 2003 ADCS7476/ADCS7477/ADCS7478 1...
Datasheet PDF File ADCS7478 PDF File

ADCS7478
ADCS7478

Overview
ADCS7476/ADCS7477/ADCS7478 1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 June 2003 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 converters 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 register architecture with internal track-and-hold.
The serial interface is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many common DSP serial interfaces.
The ADCS7476/77/78 uses the supply voltage as a reference.
This enables the devices to operate with a full-scale input range of 0 to VDD.
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 −40˚C to +125˚C.
Features n n n n n Variable power management Packaged in 6-lead, SOT-23 Power supply used as reference Single +2.
7V to +5.
25V supply operation SPI™/QSPI™/MICROWIRE™/DSP compatible Key Specifications n n n n n Resolution with no Missing Codes Conversion Rate DNL INL Power Consumption 3V Supply 5V Supply 12/10/8 bits 1 MSPS +0.
5, -0.
3 LSB (typ) ± 0.
4 LSB (typ) 2 mW (typ) 10 mW (typ) Applications n n n n n n Automotive Navigat...


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