Overview
The AD7942BCPZRL is a 14-bit, successive approximation, analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single power supply, VDD, ranging from 2.3 V to 5.5 V, making it versatile for various applications. The AD7942 features a low power, high speed ADC with no missing codes, an internal conversion clock, and a versatile serial interface port compatible with SPI logic. It also includes a low noise, wide bandwidth, short aperture delay track-and-hold circuit, which is ideal for multiple, multiplexed channel applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 250 kSPS (kilosamples per second) |
| Input Type | Pseudo-Differential |
| Reference Type | External |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Interface Type | 3-Wire, SPI-compatible |
| Operating Temperature | -40°C to +85°C |
| Package | 10-Lead LFCSP (Lead Frame Chip Scale Package) |
| Differential Nonlinearity (DNL) | ±0.7 LSB |
| Integral Nonlinearity (INL) | ±1 LSB |
| Signal to Noise Ratio (SNR) | 85 dB |
Key Features
- Low power consumption, scaling linearly with throughput, making it ideal for battery-powered applications.
- High speed operation with a sampling rate of 250 kSPS.
- No missing codes and internal conversion clock.
- Versatile serial interface port compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using a separate supply (VIO).
- On-chip track-and-hold circuit with low noise and wide bandwidth.
- No pipeline delay or latency, suitable for multiple, multiplexed channel applications.
- Optional busy indicator and daisy-chaining capability for multiple ADCs on a single 3-wire bus.
Applications
- Battery-powered devices due to its low power consumption.
- Industrial automation and control systems.
- Medical devices requiring high precision and low noise.
- Multiplexed channel applications in data acquisition systems.
- Portable and handheld instruments.
Q & A
- What is the resolution of the AD7942BCPZRL ADC?
The AD7942BCPZRL has a resolution of 14 bits.
- What is the sampling rate of the AD7942BCPZRL?
The sampling rate is 250 kSPS (kilosamples per second).
- What type of input does the AD7942BCPZRL support?
The AD7942BCPZRL supports pseudo-differential inputs.
- What is the operating temperature range of the AD7942BCPZRL?
The operating temperature range is -40°C to +85°C.
- What type of package is the AD7942BCPZRL available in?
The AD7942BCPZRL is available in a 10-Lead LFCSP (Lead Frame Chip Scale Package).
- Is the AD7942BCPZRL compatible with different logic levels?
Yes, it is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using a separate supply (VIO).
- Does the AD7942BCPZRL have any pipeline delay or latency?
No, the AD7942BCPZRL does not exhibit any pipeline delay or latency.
- Can multiple AD7942BCPZRL ADCs be daisy-chained on a single bus?
Yes, multiple ADCs can be daisy-chained on a single 3-wire bus.
- What is the typical power consumption of the AD7942BCPZRL at 100 SPS with a 2.5 V power supply?
The typical power consumption is 1.25 μW.
- Is the AD7942BCPZRL suitable for battery-powered applications?
Yes, it is ideal for battery-powered applications due to its low power consumption.
