8-Bit Analog-to-Digital Converter - Texas Instruments
Description
ADC081C021, ADC081C027
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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
1
•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 VSSOP8 package with an alert output and tw...
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