Overview
The AD7891YSZ-2 is a high-performance, 8-channel, 12-bit data acquisition system produced by Analog Devices Inc. This component is part of the AD7891 series, which integrates an input multiplexer, an on-chip track/hold amplifier, a high-speed 12-bit ADC, and a 2.5 V reference on a single chip. It operates from a single 5 V supply and offers both parallel and serial interface structures, determined by the MODE pin. This flexibility makes it suitable for a wide range of applications, including data acquisition systems, motor control, and mobile communication base stations.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 12-bit | |
| Number of Channels | 8 | Single-ended analog input channels |
| Input Ranges | 0 V to +2.5 V, 0 V to +5 V, ±2.5 V | For AD7891-2 model |
| Conversion Time | 1.6 ms max | |
| Acquisition Time | 0.4 ms max (AD7891-2), 0.6 ms max (AD7891-1 with hardware convert start), 0.7 ms max (AD7891-1 with software convert start) | |
| Sample Rate | Up to 500 kSPS (single channel), up to 62.5 kSPS (channel hopping) | |
| Operating Temperature Range | -40°C to 85°C | |
| Power Supply | Single 5 V supply | |
| Power Dissipation | Typically 82 mW in normal mode, 75 mW in standby mode | |
| Package Type | 44-terminal MQFP |
Key Features
- High-Speed ADC: Fast 12-bit ADC with a conversion time of 1.6 ms.
- Flexible Interface: Offers both parallel and serial interface structures, selectable via the MODE pin.
- On-Chip Components: Includes an input multiplexer, track/hold amplifier, and a 2.5 V reference.
- Overvoltage Protection: Each channel has overvoltage protection to prevent unselected channel overvoltages from affecting the conversion on a selected channel.
- Low Power Operation: Single-supply operation with low power dissipation (typically 82 mW in normal mode and 75 mW in standby mode).
- Dynamic Performance: Specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio.
Applications
- Data Acquisition Systems: Ideal for high-speed data acquisition in various industrial and scientific applications.
- Motor Control: Used in motor control systems for precise monitoring and control.
- Mobile Communication Base Stations: Suitable for use in mobile communication base stations due to its high-speed and low-power characteristics.
- Instrumentation: Applied in various instrumentation systems requiring high accuracy and speed.
Q & A
- What is the resolution of the AD7891YSZ-2?
The AD7891YSZ-2 has a 12-bit resolution.
- How many analog input channels does the AD7891YSZ-2 have?
The AD7891YSZ-2 has 8 single-ended analog input channels.
- What are the input voltage ranges for the AD7891YSZ-2?
The input voltage ranges for the AD7891-2 model are 0 V to +2.5 V, 0 V to +5 V, and ±2.5 V.
- What is the conversion time of the AD7891YSZ-2?
The conversion time is 1.6 ms maximum.
- What is the maximum sample rate of the AD7891YSZ-2?
The maximum sample rate is up to 500 kSPS for single-channel sampling and up to 62.5 kSPS for channel hopping.
- What is the operating temperature range of the AD7891YSZ-2?
The operating temperature range is -40°C to 85°C.
- What type of power supply does the AD7891YSZ-2 require?
The AD7891YSZ-2 operates from a single 5 V supply.
- What is the typical power dissipation of the AD7891YSZ-2 in normal mode?
The typical power dissipation in normal mode is 82 mW.
- Does the AD7891YSZ-2 have overvoltage protection?
Yes, each channel has overvoltage protection.
- In what package type is the AD7891YSZ-2 available?
The AD7891YSZ-2 is available in a 44-terminal MQFP package.
