Product details

Resolution (Bits) 8 Number of input channels 1 Sample rate (Max) (kSPS) 189 Interface type I2C Architecture SAR Input type Single-Ended Multi-channel configuration Rating Catalog Reference mode Supply Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Oscillator, Small Size Operating temperature range (C) -40 to 105 Power consumption (Typ) (mW) 0.26 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 49.8 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 0.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5
Resolution (Bits) 8 Number of input channels 1 Sample rate (Max) (kSPS) 189 Interface type I2C Architecture SAR Input type Single-Ended Multi-channel configuration Rating Catalog Reference mode Supply Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Oscillator, Small Size Operating temperature range (C) -40 to 105 Power consumption (Typ) (mW) 0.26 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 49.8 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 0.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5
SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6
  • 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)

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)

All trademarks are the property of their respective owners. I2C is a trademark of Texas Instruments.

  • 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)

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)

All trademarks are the property of their respective owners. I2C is a trademark of Texas Instruments.

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.

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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Technical documentation

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Type Title Date
* Data sheet ADC081C021/C027 I2C-Compatible, 8-Bit ADC with Alert Function datasheet (Rev. C) 25 Mar 2013
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015
User guide ADC1X1C02X Evaluation Board User Guide 25 Jan 2012

Design & development

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Driver or library

ADC081C021SW-LINUX — Linux Driver for ADC081C021

The Linux driver supports the ADC081C021 series of ADCs. The Linux driver supports communication through the I2C bus and interfaces with the IIO sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • adc081c021
  • adc081c027

 

Linux Source (...)

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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SOT-23-THIN (DDC) 6 View options

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