Overview
The ADC141S626CIMM/NOPB is a 14-bit analog-to-digital converter (ADC) produced by Texas Instruments. This micro power ADC operates at sampling rates ranging from 50 kSPS to 250 kSPS and features true differential inputs, ensuring excellent common-mode signal rejection. The ADC is based on a successive-approximation register (SAR) architecture and includes an internal sample-and-hold function. It supports independent analog and digital supplies, allowing for flexible power management and communication with various controllers.
Key Specifications
| Parameter | Typical Limits | Units |
|---|---|---|
| Conversion Rate | 50 kSPS to 250 kSPS | kSPS |
| Resolution | 14 Bits | Bits |
| Integral Non-Linearity (INL) | ±0.95 LSB (Max) | LSB |
| Differential Non-Linearity (DNL) | ±0.95 LSB (Max) | LSB |
| Signal-to-Noise Ratio (SNR) | 82 dBc (Max) | dBc |
| Total Harmonic Distortion (THD) | -90 dBc (Typ) | dBc |
| Effective Number of Bits (ENOB) | 13.3 Bits (Min) | Bits |
| Analog Supply Voltage Range (VA) | 2.7V to 5.5V | V |
| Digital Input/Output Supply Voltage Range (VIO) | 2.7V to 5.5V | V |
| Reference Voltage Range (VREF) | 1V to VA | V |
| Power Consumption (200 kSPS, 3V) | 2.0 mW (Typ) | mW |
| Power Consumption (250 kSPS, 5V) | 4.8 mW (Typ) | mW |
| Power Consumption (Power-Down, 3V) | 4 µW (Typ) | µW |
| Power Consumption (Power-Down, 5V) | 13 µW (Typ) | µW |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 10-lead VSSOP |
Key Features
- True Differential Inputs: Maintains the differential nature of the analog inputs from the internal sample-and-hold circuits throughout the A/D converter, providing excellent common-mode signal rejection.
- Successive-Approximation Register (SAR) Architecture: Utilizes a SAR architecture with an inherent sample-and-hold function.
- Independent Analog and Digital Supplies: Allows for flexible power management with VA and VIO ranging from 2.7V to 5.5V.
- External Reference: Supports an external reference voltage (VREF) that can be varied from 1V to VA.
- Zero-Power Track Mode: Minimizes power consumption while the internal sampling capacitor tracks the applied analog input voltage.
- Serial Interface Compatibility: Compatible with SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces.
- No Latency: The conversion result is clocked out by the serial clock input with no latency.
Applications
- Automotive Navigation: Suitable for automotive systems requiring precise and low-power analog-to-digital conversion.
- Portable Systems: Ideal for battery-operated systems due to its low power consumption.
- Medical Instruments: Used in medical devices that require high accuracy and low noise.
- Instrumentation and Control Systems: Applicable in various industrial control and measurement systems.
- Motor Control: Can be used in motor control systems that require precise analog input monitoring.
- Direct Sensor Interface: Directly connects to bridge sensors and transducers in remote data acquisition applications.
Q & A
- What is the resolution of the ADC141S626?
The ADC141S626 has a resolution of 14 bits.
- What is the sampling rate range of the ADC141S626?
The sampling rate ranges from 50 kSPS to 250 kSPS.
- What type of architecture does the ADC141S626 use?
The ADC141S626 uses a successive-approximation register (SAR) architecture.
- What is the operating temperature range of the ADC141S626?
The operating temperature range is from -40°C to +85°C.
- Can the ADC141S626 operate with independent analog and digital supplies?
Yes, the ADC141S626 can operate with independent analog (VA) and digital input/output (VIO) supplies ranging from 2.7V to 5.5V.
- What is the power consumption of the ADC141S626 at 200 kSPS with a 3V supply?
The power consumption is approximately 2.0 mW at 200 kSPS with a 3V supply.
- Does the ADC141S626 have any latency in its conversion result?
No, the conversion result is clocked out by the serial clock input with no latency.
- What serial interfaces is the ADC141S626 compatible with?
The ADC141S626 is compatible with SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces.
- What is the package type of the ADC141S626?
The ADC141S626 is available in a 10-lead VSSOP package.
- What is the zero-power track mode in the ADC141S626?
The zero-power track mode minimizes power consumption while the internal sampling capacitor tracks the applied analog input voltage.
