Overview
The AD7922ARM is a 12-bit, high-speed, low-power successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7912/AD7922 family and is designed for applications requiring high throughput rates and low power consumption. The AD7922ARM operates from a single 2.35 V to 5.25 V power supply and features a throughput rate of up to 1 MSPS. It includes a low noise, wide bandwidth track-and-hold amplifier capable of handling input frequencies in excess of 6 MHz.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Throughput Rate | Up to 1 MSPS |
| Power Supply | 2.35 V to 5.25 V |
| Input Range | 0 to VDD |
| Package Type | 8-lead MSOP, 8-lead TSOT |
| Operating Temperature | -40°C to +85°C |
| Standby Current | 1 µA maximum |
| Interface | SPI/QSPI/MICROWIRE/DSP compatible |
Key Features
The AD7922ARM features several key attributes that make it suitable for a variety of applications. These include:
- High-speed serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- No pipeline delays, allowing for real-time conversion.
- Flexible power and serial clock speed management.
- Daisy-chain mode for connecting multiple ADCs.
- Low power dissipation with a standby current of 1 µA maximum.
- A low noise, wide bandwidth track-and-hold amplifier.
- Internal reference taken from VDD, providing the widest dynamic input range.
Applications
The AD7922ARM is versatile and can be used in various applications, including:
- Battery-powered systems such as personal digital assistants and mobile communications devices.
- Medical instruments and optical sensors.
- Instrumentation and control systems.
- Data acquisition systems and high-speed modems.
Q & A
- What is the resolution of the AD7922ARM?
The AD7922ARM has a resolution of 12 bits.
- What is the maximum throughput rate of the AD7922ARM?
The maximum throughput rate is up to 1 MSPS.
- What is the power supply range for the AD7922ARM?
The device operates from a single 2.35 V to 5.25 V power supply.
- What types of packages are available for the AD7922ARM?
The device is available in 8-lead MSOP and 8-lead TSOT packages.
- What is the operating temperature range for the AD7922ARM?
The operating temperature range is -40°C to +85°C.
- Does the AD7922ARM support daisy-chain mode?
Yes, the AD7922ARM supports daisy-chain mode for connecting multiple ADCs.
- What is the standby current of the AD7922ARM?
The standby current is 1 µA maximum.
- What interfaces are supported by the AD7922ARM?
The device supports SPI, QSPI, MICROWIRE, and DSP compatible interfaces.
- What is the input range for the AD7922ARM?
The input range is 0 to VDD.
- What kind of amplifier does the AD7922ARM include?
The device includes a low noise, wide bandwidth track-and-hold amplifier.
