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Overview
Features and Benefits
- Specified for VDD of 3 V and 5 V
- Low power at max throughput rate
3.3 mW max at 555 kSPS with 3 V supplies
7.25 mW max at 555 kSPS with 5 V supplies - Fully differential analog input
- Wide input bandwidth
70 dB SINAD at 100 kHz input frequency
- Flexible power/serial clock speed management
- No pipeline delays
- High speed serial interface
SPI/QSPI™/MICROWIRE™/ DSP compatible - Power-down mode: 1 μA max
- 8-lead SOT-23 package
Product Details
The AD74521 is a 12-bit, high speed, low power, successive-approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply and features throughput rates up to 555 kSPS.
The part contains a low noise, wide bandwidth, differential track-and-hold amplifier (T/H) that can handle input frequencies up to 3.5 MHz. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.
The conversion process and data acquisition are controlled using CS and the serial clock allowing the device to interface with Microprocessors or DSPs. The input signals are sampled on the falling edge of CS and the conversion is also initiated at this point.
The SAR architecture of this part ensures that there are no pipeline delays.
The AD7452 uses advanced design techniques to achieve very low power dissipation at high throughput rates.
1 Protected by U.S. Patent Number 6,681,332.
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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Technical Articles (2)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
