Features • I 2C-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 (MSOP-8 only) • Out-of-range Alert Function • Automatic Power-down mode while not converting • Very small TSOT-6 and MSOP-8 packages • ±8kV HBM ESD protection (SDA, SCL) 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 I 2C-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 I 2C 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 TSOT-6 package with an alert output, and an MSOP-8 package with an alert output and two address selection inputs. The ADC081C027 comes in a small TSOT-6 package with an address selection input. The ADC081C027 provides three pin-selectable addresses while the MSOP-8 version of the ADC081C021 provides nine pin-selectable addresses. Pin-compatible alternatives to the TSOT-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 guaranteed. 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. Key Specification Resolution 8 bits; no missing codes Conversion Time 1µs (typ) INL & DNL ±0.2 LSB (max) Throughput Rate 188.9ksps (max) Power Consumption (at 22ksps) 3V Supply 0.26 mW (typ) 5V Supply 0.78 mW (typ) Applications • System Monitoring • Peak Detection • Portable Instruments • Medical Instruments • Test Equipment

Typical Application Circuit MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image Typical Application Circuit	Block Diagram click for larger image Block Diagram
Typical Performance click for larger image INL vs. CODE - Va=3.0V

Datasheet

Title		Size	Date	Other Language
	ADC081C021/ADC081C027 I 2 C-Compatible, 8-Bit Analog-to-Digital Converter with Alert Function	790 Kbytes	5-Feb-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-258: Application Note 258 Data Acquisition Using the ADC0816 and ADC0817 8-Bit A/D Converter with On-Chip 16 Channel Multiplexer	683 Kbytes	4-Oct-04
	AN-280: AN-280 A/D Converters Easily Interface with 70 Series Microprocessors	134 Kbytes	4-Oct-04
	AN-247: Application Note 247 Using the ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Analog Multiplexer	547 Kbytes	3-Oct-02

More Application Notes

Title		Size	Date	Other Language
	AN-258: Application Note 258 Data Acquisition Using the ADC0816 and ADC0817 8-Bit A/D Converter with On-Chip 16 Channel Multiplexer	683 Kbytes	4-Oct-04
	AN-247: Application Note 247 Using the ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Analog Multiplexer	547 Kbytes	3-Oct-02
	AN-280: AN-280 A/D Converters Easily Interface with 70 Series Microprocessors	134 Kbytes	4-Oct-04
	AN-193: AN-193 Single Chip Data Acquisition System Simplifies Analog-to-Digital Conversion	106 Kbytes	4-Oct-04

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC081C027CIMK	CMOS7	0	18406	0	0	1089000	4	309006723
ADC081C027CIMKX	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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