Overview
The AD7677AST is a 16-bit, 1 MSPS (Mega Samples Per Second), fully differential analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 5 V power supply and is designed for high-performance applications requiring precise data conversion. The AD7677AST features a charge redistribution successive approximation register (SAR) architecture, internal conversion clock, and error correction circuits. It is available in 48-lead Quad Flatpack (LQFP) and 48-lead Frame Chip Scale (LFCSP) packages, with an operating temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 | Bits | ||
| Analog Input Voltage Range | 0.4 V | OVDD - 0.6 V | V | |
| Power Supplies (AVDD, DVDD) | 4.75 | 5 | 5.25 | V |
| Power Supplies (OVDD) | 2.7 | 5.25 | V | |
| Operating Current (1 MSPS Throughput) | 16.7 mA | mA (AVDD) | ||
| Operating Current (1 MSPS Throughput) | 6.4 mA | mA (DVDD) | ||
| Operating Current (1 MSPS Throughput) | 69 µA | µA (OVDD) | ||
| Power Dissipation (1 MSPS Throughput) | 115 mW | 130 mW | mW | |
| Power Dissipation (Power-Down Mode) | 7 µW | µW | ||
| Temperature Range | –40°C | +85°C | °C |
Key Features
- Excellent Linearity: The AD7677AST has a maximum integral nonlinearity of 1 LSB with no missing 16-bit codes.
- Superior AC Performance: It offers a minimum dynamic range of 92 dB, with a typical value of 94 dB.
- Fast Throughput: The device supports a sampling rate of 1 MSPS and features internal error correction circuitry.
- Single-Supply Operation: It operates from a single 5 V supply, with power dissipation decreasing with throughput.
- Versatile Interface: Offers both parallel (8 bits or 16 bits) and serial interface options, compatible with both 3 V and 5 V logic.
- Low Power Modes: Includes fast mode (Normal), high-speed mode (Warp), and low-power mode (Impulse) to cater to various application needs.
Applications
- CT Scanners: Suitable for high-resolution imaging applications.
- Data Acquisition Instrumentation: Ideal for precision data acquisition systems.
- Spectrum Analysis: Used in spectral analysis due to its high dynamic range.
- Medical Instruments: Applied in medical devices requiring high accuracy and reliability.
- Battery-Powered Systems: Suitable for low-power applications.
- Process Control: Used in industrial process control systems for precise measurement.
Q & A
- What is the resolution of the AD7677AST?
The AD7677AST has a resolution of 16 bits. - What is the maximum sampling rate of the AD7677AST?
The maximum sampling rate is 1 MSPS. - What are the available interface options for the AD7677AST?
The device offers both parallel (8 bits or 16 bits) and serial interface options. - What is the operating voltage range for the AD7677AST?
The device operates from a single 5 V supply. - What are the typical power dissipation values for the AD7677AST?
Typical power dissipation is 115 mW at 1 MSPS throughput, and it decreases with lower throughput rates. - What is the temperature range for the AD7677AST?
The operating temperature range is –40°C to +85°C. - Does the AD7677AST support low-power modes?
Yes, it supports fast mode (Normal), high-speed mode (Warp), and low-power mode (Impulse). - What are some common applications of the AD7677AST?
Common applications include CT scanners, data acquisition instrumentation, spectrum analysis, medical instruments, battery-powered systems, and process control. - What type of ADC architecture does the AD7677AST use?
The AD7677AST uses a charge redistribution successive approximation register (SAR) architecture. - Is the AD7677AST factory calibrated?
Yes, the AD7677AST is hardware factory calibrated and comprehensively tested for various parameters.
