Overview
The AD7450ARZ, produced by Analog Devices Inc., is a high-performance, 12-bit successive approximation (SAR) analog-to-digital converter (ADC). This device is notable for its high throughput rates, low power consumption, and flexible operating conditions. It features a fully differential analog input and operates from a single 3 V or 5 V power supply, making it versatile for various applications. The AD7450ARZ includes a low noise, wide bandwidth differential track-and-hold amplifier and supports throughput rates up to 1 MSPS with a 5 V supply and 833 kSPS with a 3 V supply. The device is designed to interface with microprocessors or DSPs, offering accurate control over the sampling instant and conversion process.
Key Specifications
| Parameter | Conditions/Comments | Value |
|---|---|---|
| Resolution | - | 12 bits |
| Throughput Rate | VDD = 5 V | 1 MSPS max |
| Throughput Rate | VDD = 3 V | 833 kSPS max |
| Conversion Time | With an 18 MHz SCLK | 888 ns |
| Track-and-Hold Acquisition Time | - | 200 ns max |
| Signal-to-(Noise + Distortion) Ratio (SINAD) | VDD = 5 V | 70 dB min |
| Signal-to-(Noise + Distortion) Ratio (SINAD) | VDD = 3 V | 68 dB min |
| Total Harmonic Distortion (THD) | VDD = 5 V | -80 dB typ |
| Power Supply | - | 3 V ± 10% or 5 V ± 5% |
| Normal Mode (Operational) Current | VDD = 5 V; fSAMPLE = 1 MSPS | 1.8 mA max |
| Normal Mode (Operational) Current | VDD = 3 V; fSAMPLE = 833 kSPS | 1.25 mA max |
| Reference Voltage Range | - | 100 mV to 3.5 V |
Key Features
- High throughput rates up to 1 MSPS with a 5 V supply and 833 kSPS with a 3 V supply.
- Low power consumption: 3.75 mW max at 833 kSPS with a 3 V supply.
- Fully differential analog input with a low noise, wide bandwidth differential track-and-hold amplifier.
- Variable reference voltage input from 100 mV to 3.5 V.
- No pipeline delay due to SAR architecture.
- Accurate control of the sampling instant via the CS input.
- Flexible power and serial clock speed management.
- Shutdown mode for power efficiency at lower throughput rates.
Applications
The AD7450ARZ is suitable for a variety of applications that require high-speed, low-power analog-to-digital conversion. These include:
- Industrial automation and control systems.
- Medical devices such as patient monitoring systems.
- Aerospace and defense systems requiring high reliability and performance.
- Automotive systems, particularly those needing high-speed data acquisition.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7450ARZ?
The AD7450ARZ has a resolution of 12 bits. - What are the throughput rates of the AD7450ARZ?
The throughput rates are up to 1 MSPS with a 5 V supply and 833 kSPS with a 3 V supply. - What is the power supply range for the AD7450ARZ?
The device operates from a single 3 V ± 10% or 5 V ± 5% power supply. - What is the typical power consumption of the AD7450ARZ?
Typical power consumption is 1.8 mA max at 1 MSPS with a 5 V supply and 1.25 mA max at 833 kSPS with a 3 V supply. - Does the AD7450ARZ have a differential analog input?
Yes, it features a fully differential analog input. - What is the range of the reference voltage for the AD7450ARZ?
The reference voltage can be varied from 100 mV to 3.5 V. - How is the conversion process initiated and controlled?
The conversion process is initiated and controlled using the CS input and the serial clock. - Does the AD7450ARZ have any pipeline delays?
No, the SAR architecture ensures there are no pipeline delays. - What is the purpose of the shutdown mode in the AD7450ARZ?
The shutdown mode is used to maximize power efficiency at lower throughput rates. - What types of applications is the AD7450ARZ suitable for?
The AD7450ARZ is suitable for industrial automation, medical devices, aerospace and defense systems, automotive systems, and test and measurement equipment.
