Overview
The AD7476WARJZ-RL7, produced by Analog Devices Inc., is a high-performance 12-bit analog-to-digital converter (ADC) designed for applications requiring high throughput and low power consumption. This device is part of the AD7476/AD7477/AD7478 family, which features advanced design techniques to achieve low power dissipation at high conversion rates. The AD7476 is packaged in a compact 6-lead SOT-23 package, making it ideal for space-constrained designs.
The ADC includes a low noise, wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 6 MHz. The conversion process is controlled using the chip select (CS) and serial clock (SCLK) signals, allowing seamless interface with microprocessors or digital signal processors (DSPs). The internal reference taken from VDD ensures a wide dynamic input range from 0 V to VDD.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12 | Bits | |
| Conversion Time | 800 | ns | 16 SCLK cycles with SCLK at 20 MHz |
| Throughput Rate | 1 | MSPS | |
| Track-and-Hold Acquisition Time | 400 | ns | |
| Aperture Delay | 10 | ns | typ |
| Aperture Jitter | 30 | ps | typ |
| Full Power Bandwidth | 6.5 | MHz | typ @ 3 dB |
| SINAD (fIN = 100 kHz sine wave, fSAMPLE = 1 MSPS) | 61 | dB | min |
| THD (fIN = 100 kHz sine wave, fSAMPLE = 1 MSPS) | -73 | dB | max |
| SFDR (fIN = 100 kHz sine wave, fSAMPLE = 1 MSPS) | -74 | dB | max |
| IMD (Second-Order Terms, fa = 103.5 kHz, fb = 113.5 kHz) | -78 | dB | typ |
| VDD | 2.7 to 5.25 | V | min/max |
| IDD (Normal Mode, Static, VDD = 4.75 V to 5.25 V, SCLK on or off) | 2 | mA | typ |
| IDD (Normal Mode, Operational, VDD = 4.75 V to 5.25 V, fSAMPLE = 1 MSPS) | 3.5 | mA | max |
| Full Power-Down Mode | 1 | μA | max, SCLK off |
Key Features
- High Throughput Rate: The AD7476 supports a throughput rate of up to 1 MSPS, making it suitable for high-speed data acquisition applications.
- Low Power Consumption: The device features low power dissipation, with a typical current consumption of 2 mA in static mode and 3.5 mA in operational mode at VDD = 4.75 V to 5.25 V.
- Wide Dynamic Input Range: The analog input range is from 0 V to VDD, allowing for a wide range of input signal levels.
- Compact Package: The 6-lead SOT-23 package is ideal for space-constrained designs.
- Flexible Power and Serial Clock Speed Management: The conversion rate can be adjusted through the serial clock speed, allowing for reduced power consumption when not converting.
- No Pipeline Delays: The conversion process is initiated on the falling edge of CS, with no pipeline delays associated with the device.
Applications
- High-Speed Data Acquisition Systems: Suitable for applications requiring fast and accurate analog-to-digital conversion.
- Medical Devices: Can be used in medical equipment that requires high precision and low power consumption.
- Industrial Automation: Ideal for control systems and monitoring applications in industrial environments.
- Consumer Electronics: Used in various consumer electronic devices that require high-speed ADCs.
- Aerospace and Defense: Suitable for applications in aerospace and defense due to its high reliability and performance.
Q & A
- What is the resolution of the AD7476WARJZ-RL7?
The AD7476WARJZ-RL7 has a resolution of 12 bits.
- What is the maximum throughput rate of the AD7476WARJZ-RL7?
The maximum throughput rate is 1 MSPS.
- What is the typical power consumption of the AD7476WARJZ-RL7 in normal mode?
The typical power consumption in normal mode is 2 mA (static) and up to 3.5 mA (operational) at VDD = 4.75 V to 5.25 V.
- What is the input voltage range for the AD7476WARJZ-RL7?
The analog input range is from 0 V to VDD.
- How is the conversion process controlled in the AD7476WARJZ-RL7?
The conversion process is controlled using the chip select (CS) and serial clock (SCLK) signals.
- What is the package type of the AD7476WARJZ-RL7?
The device is packaged in a 6-lead SOT-23 package.
- Does the AD7476WARJZ-RL7 have pipeline delays?
No, there are no pipeline delays associated with this device.
- What is the full power bandwidth of the AD7476WARJZ-RL7?
The full power bandwidth is 6.5 MHz at 3 dB.
- How does the AD7476WARJZ-RL7 manage power consumption during idle periods?
The device features a full power-down mode with a maximum current consumption of 1 μA when SCLK is off.
- What are some typical applications of the AD7476WARJZ-RL7?
Typical applications include high-speed data acquisition systems, medical devices, industrial automation, consumer electronics, and aerospace and defense.
