Overview
The ADC121C021CIMK from Texas Instruments is a low-power, monolithic, 12-bit analog-to-digital converter (ADC) designed for a wide range of applications. This device operates from a single supply voltage ranging from +2.7V to +5.5V and features an I2C-compatible serial interface that supports standard, fast, and high-speed modes up to 3.4MHz. The ADC is based on a successive approximation register architecture with an internal track-and-hold circuit capable of handling input frequencies up to 11MHz. The device is available in small packages, including a 6-pin SOT and an 8-pin VSSOP, making it an excellent choice for battery-operated equipment due to its low power consumption and compact size.
Key Specifications
| Parameter | Value |
|---|---|
| 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) | 0.26 mW (Typ) at 3V, 0.78 mW (Typ) at 5V |
| Operating Temperature Range | -40°C to +105°C |
| Package | 6-pin SOT-23-THN (DDC), 8-pin VSSOP |
| Supply Voltage | +2.7V to +5.5V |
Key Features
- I2C-Compatible 2-Wire Interface supporting standard, fast, and high-speed modes up to 3.4MHz
- Extended Power Supply Range (+2.7V to +5.5V)
- Up to nine pin-selectable chip addresses (VSSOP only)
- Out-of-Range Alert Function with programmable upper or lower limit values
- Automatic Power-Down Mode while not converting, reducing power consumption to less than 1µW
- Very small 6-pin SOT and 8-pin VSSOP packages
- ADC121C021Q is an Automotive Grade Product that is AEC-Q100 Grade 2 Qualified
Applications
The ADC121C021CIMK is suitable for a variety of applications, particularly those requiring low power consumption and compact size. These include:
- Battery-operated equipment
- Industrial automation and control systems
- Automotive systems (especially the ADC121C021Q which is AEC-Q100 Grade 2 Qualified)
- Medical devices requiring precise analog-to-digital conversion
- Consumer electronics where space and power efficiency are critical
Q & A
- What is the resolution of the ADC121C021CIMK?
The ADC121C021CIMK has a resolution of 12 bits with no missing codes.
- What are the supported I2C interface speeds for the ADC121C021CIMK?
The device supports standard (100kHz), fast (400kHz), and high-speed (3.4MHz) I2C interface modes.
- What is the operating temperature range of the ADC121C021CIMK?
The operating temperature range is from -40°C to +105°C.
- How does the out-of-range alert function work?
The out-of-range alert function provides an interrupt when the analog input violates a programmable upper or lower limit value.
- What are the available package options for the ADC121C021CIMK?
The device is available in a 6-pin SOT-23-THN (DDC) package and an 8-pin VSSOP package.
- What is the typical power consumption of the ADC121C021CIMK at different supply voltages?
The typical power consumption is 0.26 mW at 3V and 0.78 mW at 5V.
- Does the ADC121C021CIMK have an automatic power-down mode?
Yes, the device has an automatic power-down mode that reduces power consumption to less than 1µW when not converting.
- Is the ADC121C021CIMK suitable for automotive applications?
Yes, the ADC121C021Q is an automotive grade product that is AEC-Q100 Grade 2 Qualified.
- What is the maximum throughput rate of the ADC121C021CIMK?
The maximum throughput rate is 188.9 ksps.
- Can the chip addresses be selected via pins?
Yes, up to nine pin-selectable chip addresses are available, especially in the VSSOP package.
