Overview
The ADC12138CIWM is a 12-bit plus sign successive approximation analog-to-digital converter (ADC) produced by Texas Instruments. This component features a serial I/O interface compatible with MICROWIRE, SPI, and QSPI protocols. It is designed with an 8-channel multiplexer and includes a sample/hold circuit, making it suitable for various data acquisition applications. The ADC operates on a single supply voltage of either 3.3V or 5V and is known for its low power consumption and high accuracy.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12-bit plus sign |
| Sampling Rate | 114 ksamples/s |
| Number of Inputs | 8 channels |
| Input Type | Differential, Pseudo-Differential, Single Ended |
| Data Interface | SPI |
| Architecture | Successive Approximation (SAR) |
| Reference Type | External |
| Voltage - Supply, Analog | 3 V to 5.5 V |
| Voltage - Supply, Digital | 3 V to 5.5 V |
| Operating Temperature | -40°C to 85°C |
| Package | 28-SOIC (0.295", 7.50mm Width) |
| Power Consumption (Active) | +3.3V: 15 mW (max), +5V: 33 mW (max) |
| Power Consumption (Power Down) | +3.3V: 40 μW (typ), +5V: 100 μW (typ) |
Key Features
- Serial I/O interface compatible with MICROWIRE, SPI, and QSPI protocols
- Programmable acquisition time and variable digital output word length
- No zero or full scale adjustment required
- Integral linearity error of ±2 LSB (max)
- Single supply operation at 3.3V or 5V ±10%
- Power down mode with low power consumption
- Configurable input multiplexer with 8 channels
- Supports differential, pseudo-differential, and single-ended input modes
Applications
The ADC12138CIWM is suitable for a variety of data acquisition applications, including industrial control systems, medical devices, automotive systems, and other environments where high accuracy and low power consumption are critical. Its ability to operate with multiple input channels and its compatibility with various serial interfaces make it a versatile component for complex data acquisition tasks.
Q & A
- What is the resolution of the ADC12138CIWM?
The ADC12138CIWM has a resolution of 12 bits plus sign.
- What is the sampling rate of the ADC12138CIWM?
The sampling rate is 114 ksamples/s.
- How many input channels does the ADC12138CIWM have?
The ADC12138CIWM has 8 input channels.
- What types of input modes are supported by the ADC12138CIWM?
The ADC supports differential, pseudo-differential, and single-ended input modes.
- What is the power consumption of the ADC12138CIWM in active mode?
In active mode, the power consumption is up to 15 mW at 3.3V and up to 33 mW at 5V.
- What is the power consumption of the ADC12138CIWM in power down mode?
In power down mode, the power consumption is typically 40 μW at 3.3V and 100 μW at 5V.
- What is the operating temperature range of the ADC12138CIWM?
The operating temperature range is -40°C to 85°C.
- What package type is the ADC12138CIWM available in?
The ADC12138CIWM is available in a 28-SOIC package.
- Does the ADC12138CIWM require zero or full scale adjustments?
No, the ADC12138CIWM does not require zero or full scale adjustments.
- What is the integral linearity error of the ADC12138CIWM?
The integral linearity error is ±2 LSB (max).
