Overview
The AD4114BCPZ from Analog Devices Inc. is a low power, low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC) that integrates an analog front end (AFE) for eight fully differential or 16 single-ended, high impedance (≥1 MΩ), bipolar, ±10 V voltage inputs. This ADC is designed to provide high precision and flexibility, making it suitable for a variety of applications requiring accurate signal conversion. The AD4114 features a maximum channel scan rate of 6.21 kSPS (161 µs) for fully settled data and includes an embedded 2.5 V, low drift internal reference, which reduces the need for external components. The device operates with a single power supply and supports a wide temperature range of −40°C to +105°C, housed in a 40-lead LFCSP package.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Number of Input Channels | 16 single-ended or 8 differential |
| Input Voltage Range | ±10 V |
| Input Impedance | ≥1 MΩ |
| Sampling Rate | 1.25 SPS to 31.25 kSPS |
| Channel Scan Rate | 6.21 kSPS per channel (161 µs settling) |
| Noise Free Bits | 17.3 bits at 1007 SPS per channel |
| Common Mode Rejection | 120 dB at 50 Hz and 60 Hz at 20 SPS per channel |
| Internal Reference | 2.5 V, ±0.12% initial accuracy, ±5 ppm/°C drift |
| Power Supply | AVDD = 3.0 V to 5.5 V, IOVDD = 2 V to 5.5 V |
| Total Current Consumption | 3.9 mA (AVDD + IOVDD) |
| Temperature Range | −40°C to +105°C |
| Digital Interface | 3-wire or 4-wire serial, SPI, QSPI, Microwire, DSP compatible |
Key Features
- Integrated analog front end (AFE) for high impedance inputs
- Flexible output rate: 1.25 SPS to 31.25 kSPS
- Automatic channel sequencer for switching through enabled channels
- Digital filter with simultaneous 50 Hz and 60 Hz rejection
- Embedded 2.5 V, low drift internal reference
- Low power consumption with sleep mode down to 1 μA
- Pulse width modulation (PWM) output with frequency up to 100 kHz
- Digital voltage regulator (DVR) with low dropout and high PSRR
- Proprietary iPassives® technology for precision performance
Applications
- Process control
- Programmable logic controller (PLC) and distributed control system (DCS) modules
- Instrumentation and measurement
- Machine control systems
- Automation components
Q & A
- Q: What is the resolution of the AD4114BCPZ ADC?
A: The AD4114BCPZ has a resolution of 24 bits.
- Q: How many input channels does the AD4114BCPZ support?
A: The AD4114BCPZ supports 16 single-ended or 8 differential input channels.
- Q: What is the input voltage range of the AD4114BCPZ?
A: The input voltage range is ±10 V.
- Q: What is the maximum sampling rate of the AD4114BCPZ?
A: The maximum sampling rate is 31.25 kSPS.
- Q: What is the temperature range of the AD4114BCPZ?
A: The temperature range is −40°C to +105°C.
- Q: Does the AD4114BCPZ have an internal reference voltage?
A: Yes, it has an embedded 2.5 V internal reference with ±0.12% initial accuracy and ±5 ppm/°C drift.
- Q: What digital interfaces does the AD4114BCPZ support?
A: It supports 3-wire or 4-wire serial, SPI, QSPI, Microwire, and DSP compatible interfaces.
- Q: What is the power consumption of the AD4114BCPZ?
A: The total current consumption is 3.9 mA (AVDD + IOVDD).
- Q: Does the AD4114BCPZ have any special power-saving modes?
A: Yes, it has a low-power sleep mode with current consumption down to 1 μA.
- Q: What kind of applications is the AD4114BCPZ suitable for?
A: It is suitable for process control, PLC and DCS modules, instrumentation and measurement, machine control systems, and automation components.
