Description

The AD7892AN-3 is a high speed, low power, 12-bit A/D converter that operates from a single +5 V supply. It has a 1.47 µs successive approximation ADC, an on-chip track/hold amplifier, an internal +2.5 V reference, and versatile interface structures that allow both serial and parallel connection to a microprocessor. The part accepts different analog input ranges depending on the model, including ±10 V or ±5 V for AD7892-1, 0 V to +2.5 V for AD7892-2, and ±2.5 V for AD7892-3. The AD7892AN-3 also features overvoltage protection on the analog inputs, allowing the input voltage to go beyond the specified range without damaging the ports. This model is fabricated in Analog Devices' Linear Compatible CMOS (LC2MOS) process, which combines precision bipolar circuits with low power CMOS logic. It is available in a 24-lead, 0.3" wide, plastic or hermetic DIP package, as well as a 24-lead SOIC package.

Specifications and features

• Fast 12-Bit ADC with 1.47 µs Conversion Time
• 600 kSPS Throughput Rate (AD7892-3)
• 500 kSPS Throughput Rate (AD7892-1, AD7892-2)
• Single Supply Operation
• On-Chip Track/Hold Amplifier
• Selection of Input Ranges:
• ±10 V or ±5 V for AD7892-1
• 0 V to +2.5 V for AD7892-2
• ±2.5 V for AD7892-3
• High Speed Serial and Parallel Interface
• Low Power, 60 mW typ
• Overvoltage Protection on Analog Inputs (AD7892-1 and AD7892-3)

Application Scenarios

The AD7892AN-3 can be used in various applications that require high speed and low power analog-to-digital conversion. Some possible application scenarios include:

1. Data acquisition systems
2. Industrial automation
3. Medical equipment
4. Scientific instruments
5. Audio processing systems

Comparison

• High speed conversion with a fast conversion time of 1.47 µs
• Multiple input ranges available to accommodate different input signal levels
• Versatile interface structures allow for both serial and parallel connection
• Low power consumption with a typical power usage of 60 mW
• Overvoltage protection on analog inputs for added protection

• Limited input voltage range for certain models (±10 V or ±5 V for AD7892-1, 0 V to +2.5 V for AD7892-2)