Overview
The AD7450ARMZ is a 12-bit, high-speed, low-power successive approximation (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This component features a fully differential analog input and operates from a single 3 V or 5 V power supply. It is designed for high throughput rates, achieving up to 1 MSPS with a 5 V supply and 833 kSPS with a 3 V supply. The AD7450ARMZ includes a low noise, wide bandwidth differential track-and-hold amplifier, making it suitable for applications requiring precise and fast analog-to-digital conversion.
Key Specifications
| Parameter | Conditions/Comments | Value |
|---|---|---|
| Resolution | 12 bits | |
| Throughput Rate | VDD = 5 V | 1 MSPS max |
| VDD = 3 V | 833 kSPS max | |
| Power Supply | 3 V ± 10% or 5 V ± 5% | |
| Power Consumption | Normal Mode (Operational), VDD = 5 V, fSAMPLE = 1 MSPS | 1.8 mA max |
| Normal Mode (Operational), VDD = 3 V, fSAMPLE = 833 kSPS | 1.25 mA 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 |
| VDD = 3 V | 68 dB min | |
| Total Harmonic Distortion (THD) | VDD = 5 V | -80 dB typ |
Key Features
- Fully differential analog input with a variable reference voltage input (100 mV to 3.5 V).
- High throughput rates with low power consumption.
- No pipeline delay due to SAR architecture.
- Flexible power and serial clock speed management, including a shutdown mode for power efficiency.
- Accurate control of the sampling instant via the CS input.
- Low noise, wide bandwidth differential track-and-hold amplifier.
- Operates from a single 3 V or 5 V power supply.
Applications
The AD7450ARMZ is suitable for a variety of applications requiring high-speed, low-power analog-to-digital conversion. These include:
- Medical devices: For precise and fast data acquisition in medical imaging and diagnostic equipment.
- Industrial automation: For high-speed data conversion in control systems and monitoring applications.
- Aerospace and defense: For applications requiring low power consumption and high reliability.
- Test and measurement: For use in oscilloscopes, signal analyzers, and other test equipment.
Q & A
- What is the resolution of the AD7450ARMZ ADC?
The AD7450ARMZ has a resolution of 12 bits. - What are the possible power supply voltages for the AD7450ARMZ?
The AD7450ARMZ can operate from a single 3 V or 5 V power supply. - What is the maximum throughput rate of the AD7450ARMZ with a 5 V power supply?
The maximum throughput rate is 1 MSPS with a 5 V power supply. - How does the AD7450ARMZ manage power consumption?
The AD7450ARMZ features flexible power and serial clock speed management, including a shutdown mode to maximize power efficiency at lower throughput rates. - What type of analog input does the AD7450ARMZ have?
The AD7450ARMZ features a fully differential analog input. - What is the typical signal-to-(noise + distortion) ratio (SINAD) of the AD7450ARMZ with a 5 V power supply?
The typical SINAD is 70 dB min with a 5 V power supply. - How is the conversion process initiated and controlled in the AD7450ARMZ?
The conversion process is initiated and controlled using the CS input and the serial clock. - Does the AD7450ARMZ have any pipeline delays?
No, the AD7450ARMZ does not have any pipeline delays due to its SAR architecture. - What is the maximum track-and-hold acquisition time of the AD7450ARMZ?
The maximum track-and-hold acquisition time is 200 ns. - What are some common applications of the AD7450ARMZ?
Common applications include medical devices, industrial automation, aerospace and defense, and test and measurement equipment.
