ADC081C027CIMK Datasheet, PDF (1/41 Pages) National Semiconductor (TI) – ADC081C021/ADC081C027 I2C-Compatible, 8-Bit Analog-to-Digital Converter (ADC) with Alert Function

ADC081C021, ADC081C027
www.ti.com
SNAS447C – FEBRUARY 2008 – REVISED MARCH 2013
ADC081C021/ADC081C027 I²C-Compatible, 8-Bit Analog-to-Digital Converter with Alert
Function
Check for Samples: ADC081C021, ADC081C027
FEATURES
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•23 I²C-Compatible 2-Wire Interface Which
Supports Standard (100kHz), Fast (400kHz),
and High Speed (3.4MHz) Modes
• Extended Power Supply Range (+2.7V to
+5.5V)
• Up to Nine Pin-Selectable Chip Addresses
(VSSOP-8 only)
• Out-of-Range Alert Function
• Automatic Power-Down Mode While Not
Converting
• Very Small SOT-6 and VSSOP-8 Packages
• ±8kV HBM ESD Protection (SDA, SCL)
APPLICATIONS
• System Monitoring
• Peak Detection
• Portable Instruments
• Medical Instruments
• Test Equipment
KEY SPECIFICATIONS
• Resolution: 8 bits; No Missing Codes
• Conversion Time 1 µs (Typ)
• INL & DNL: ±0.2 LSB (Max)
• Throughput Rate: 188.9 ksps (Max)
• Power Consumption (at 22ksps):
– 3V Supply: 0.26 mW (Typ)
– 5V Supply: 0.78 mW (Typ)
DESCRIPTION
The ADC081C021 is a low-power, monolithic, 8-bit,
analog-to-digital converter (ADC) that operates from a
+2.7 to 5.5V supply. The converter is based on a
successive approximation register architecture with
an internal track-and-hold circuit that can handle input
frequencies up to 11MHz. The ADC081C021
operates from a single supply which also serves as
the reference. The device features an I²C-compatible
serial interface that operates in all three speed
modes, including high speed mode (3.4MHz).
The ADC's Alert feature provides an interrupt that is
activated when the analog input violates a
programmable upper or lower limit value. The device
features an automatic conversion mode, which frees
up the controller and I²C interface. In this mode, the
ADC continuously monitors the analog input for an
"out-of-range" condition and provides an interrupt if
the measured voltage goes out-of-range.
The ADC081C021 comes in two packages: a small
SOT-6 package with an alert output, and an VSSOP-
8 package with an alert output and two address
selection inputs. The ADC081C027 comes in a small
SOT-6 package with an address selection input. The
ADC081C027 provides three pin-selectable
addresses while the VSSOP-8 version of the
ADC081C021 provides nine pin-selectable
addresses. Pin-compatible alternatives to the SOT-6
options are available with additional address options.
Normal power consumption using a +3V or +5V
supply is 0.26mW or 0.78mW, respectively. The
automatic power-down feature reduces the power
consumption to less than 1µW while not converting.
Operation over the industrial temperature range of
−40°C to +105°C is ensured. Their low power
consumption and small packages make this family of
ADCs an excellent choice for use in battery operated
equipment.
The ADC081C021 and ADC081C027 are part of a
family of pin-compatible ADCs that also provide 10-
and 12-bit resolution. For 10-bit ADCs see the
ADC101C021 and ADC101C027. For 12-bit ADCs
see the ADC121C021 and ADC121C027.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I2C is a registered trademark of Phillips Corporation..
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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