ADCS7476 Datasheet, PDF (1/33 Pages) National Semiconductor (TI) – 1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23

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ADCS7476, ADCS7477, ADCS7478
SNAS192G – APRIL 2003 – REVISED MAY 2016
ADCS747x 1-MSPS, 12-Bit, 10-Bit, and 8-Bit A/D Converters
1 Features
•1 Variable Power Management
• Packaged in 6-Pin SOT-23
• Power Supply Used as Reference
• Single 2.7-V to 5.25-V Supply Operation
• Compatible With SPI™, QSPI™, MICROWIRE™,
and DSP
• Key Specifications
– Resolution With No Missing Codes (12-Bit, 10-
Bit, and 8-Bit)
– Conversion Rate: 1 MSPS
– DNL: 0.5, –0.3 LSB (Typical)
– INL: ±0.4 LSB (Typical)
– Power Consumption:
– 3-V Supply: 2 mW (Typical)
– 5-V Supply: 10 mW (Typical)
2 Applications
• Automotive Navigation
• FA or ATM Equipment
• Portable Systems
• Medical Instruments
• Mobile Communications
• Instrumentation and Control Systems
3 Description
The ADCS7476, ADCS7477, and ADCS7478 devices
are low power, monolithic CMOS 12-, 10-, and 8-bit
analog-to-digital converters that operate at 1 MSPS.
The ADCS747x devices are a drop-in replacement for
Analog Device's AD747x. 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 ADCS747x uses the supply voltage as a
reference, enabling the device 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 ADCS747x is operated with a single supply that
can range from 2.7 V to 5.25 V. Normal power
consumption during continuous conversion, using a
3-V or 5-V 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 5-V supply. All three converters
are available in a 6-pin SOT-23 package, which
provides an extremely small footprint for applications
where space is a critical consideration. These
products are designed for operation over the
automotive and extended industrial temperature
range of −40°C to 125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADCS7476
ADCS7477
ADCS7478
SOT-23 (6)
1.60 mm × 2.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
VIN
T/H
SUCCESSIVE
APPROXIMATION
ADC
ADCS7476
ADCS7477
ACDS7478
CONTROL
LOGIC
SCLK
CS
SDATA
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.