ADC121C021-Q1
- 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 Only)
- Out-of-Range Alert Function
- Automatic Power-Down Mode while Not Converting
- Very Small 6-Pin SOT and 8-Pin VSSOP Packages
- ADC121C021Q is an Automotive Grade Product that is AEC-Q100 Grade 2 Qualified
Key Specifications
- Resolution: 12 Bits (No Missing Codes)
- Conversion Time: 1µs (Typ)
- INL & DNL: ±1 LSB (Max) (Up to 22ksps)
- Throughput Rate: 188.9 ksps (Max)
- Power Consumption (at 22 ksps)
- 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.
These converters are low-power, monolithic, 12-bit, analog-to-digital converters (ADCs) that operates from a +2.7 to 5.5V supply. The converter is based upon a successive approximation register architecture with an internal track-and-hold circuit that can handle input frequencies up to 11MHz. These converters operate 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 ADC121C021'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 ADC121C021 comes in two packages: a small 6-pin SOT package with an alert output, and an 8-pin VSSOP package with an alert output and two address selection inputs. The ADC121C021Q is available in a 6-pin SOT package. The ADC121C027 comes in a small 6-pin SOT package with an address selection input. The ADC121C027 provides three pin-selectable addresses while the 8-pin VSSOP version of the ADC121C021 provides nine pin-selectable addresses. Pin-compatible alternatives to the 6-pin SOT 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 ADC121C021 and ADC121C027 are part of a family of pin-compatible ADCs that also provide 8 and 10 bit resolution. For 8-bit ADCs see the ADC081C021 and ADC081C027. For 10-bit ADCs see the ADC101C021 and ADC101C027.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | ADC121C021/C021Q/C027 I2C-Compatible, 12-Bit ADC with Alert Function 数据表 (Rev. F) | 2013年 3月 19日 | |||
应用手册 | A Basic Guide to I2C | PDF | HTML | 2022年 11月 8日 | |||
电子书 | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 2015年 5月 21日 |
设计和开发
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ADC121C021EVM — ADC121C021 评估模块
ADC121C021EVM 是一款演示套件,适用于 12 位 1 通道 188.9ksps 2 线接口 SAR 模数转换器 ADC121C021。此 EVM 可供用户评估 ADC121C021 数据转换器的功能和性能。此板包含外部模拟温度传感器 LMT84,让用户可以快速评估 ADC。此 EVM 采用可直接连接到 MSP430F5529 LaunchPad 板的小尺寸布局
注意:ADC121C021EVM 也可用来评估 ADC121C027
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
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SOT-23-THN (DDC) | 6 | Ultra Librarian |
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