Overview
The AD7854ARS is a high-speed, low-power, 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. This component operates from a single 3 V or 5 V power supply, making it versatile for various applications. The AD7854ARS is optimized for speed, with a throughput rate of 200 kHz, and features self-calibration and system calibration options to ensure accurate operation over time and temperature. It is part of the AD7854 series, which includes a lower power version, the AD7854L, but the AD7854ARS is specifically designed for high-speed applications.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Package | 28-SSOP (0.209", 5.30mm Width) |
| Number of Bits | 12 |
| Sampling Rate (Per Second) | 200 kSPS |
| Number of Inputs | 1 |
| Input Type | Pseudo-Differential |
| Data Interface | Parallel |
| Configuration | S/H-ADC |
| Ratio - S/H:ADC | 1:1 |
| Number of A/D Converters | 1 |
| Architecture | SAR (Successive Approximation Register) |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 3 V ~ 5.5 V |
| Voltage - Supply, Digital | 3 V ~ 5.5 V |
| Operating Temperature | -40°C ~ 85°C |
Key Features
- Operates with either 3 V or 5 V power supplies, providing flexibility in power management.
- Flexible power management options, including automatic power-down after conversion, to achieve superior power performance at slower throughput rates.
- Self-calibration and system calibration options to ensure accurate operation over time and temperature.
- Versatile parallel I/O port for easy integration into various systems.
- Pseudo-differential sampling scheme with an input track-and-hold acquisition time of 500 ns.
- Analog input ranges from 0 V to VREF (unipolar) and –VREF/2 to +VREF/2 (bipolar).
- Low power consumption, with the AD7854ARS consuming 15 mW at 3 V and the AD7854L consuming 5.5 mW at 3 V.
Applications
- Battery-Powered Systems: Suitable for personal digital assistants, medical instruments, and mobile communications due to its low power consumption.
- Pen Computers: Ideal for portable computing devices requiring high-speed and low-power ADCs.
- Instrumentation and Control Systems: Used in various measurement and control applications where precision and speed are critical.
- High Speed Modems: Applicable in high-speed data transmission systems requiring fast and accurate analog-to-digital conversion.
Q & A
- What is the sampling rate of the AD7854ARS?
The AD7854ARS has a sampling rate of 200 kSPS (kilosamples per second).
- What are the power supply options for the AD7854ARS?
The AD7854ARS can operate with either 3 V or 5 V power supplies.
- What is the input type of the AD7854ARS?
The AD7854ARS features a pseudo-differential input type.
- Does the AD7854ARS support self-calibration?
Yes, the AD7854ARS supports both self-calibration and system calibration.
- What is the operating temperature range of the AD7854ARS?
The operating temperature range is from -40°C to 85°C.
- What is the package type of the AD7854ARS?
The AD7854ARS comes in a 28-SSOP (Shrink Small Outline Package) with a width of 0.209 inches (5.30 mm).
- How many bits does the AD7854ARS ADC have?
The AD7854ARS is a 12-bit ADC.
- What is the data interface type of the AD7854ARS?
The AD7854ARS uses a parallel data interface.
- Is the AD7854ARS suitable for battery-powered systems?
Yes, it is suitable due to its low power consumption and flexible power management options.
- What are the typical power consumption values for the AD7854ARS?
The AD7854ARS typically consumes 15 mW at 3 V, and the AD7854L version consumes 5.5 mW at 3 V.
