Overview
The AD7777ARZ-REEL is a high-speed, 10-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is primarily designed for use in high-density hard disk drives, particularly in read/write head positioning servos. It features unique input signal conditioning capabilities, making it ideal for single-supply applications. The AD7777 is available in a 28-lead, wide-body SOIC package and is fabricated using linear compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low-power CMOS logic.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7777ARZ-REEL |
| Package | 28-SOIC (0.295, 7.50mm Width) |
| Number of Bits | 10 |
| Number of A/D Converters | 4 |
| Sampling Rate | 378 ksps |
| Integral Nonlinearity (INL) | 1 LSB |
| Differential Nonlinearity | 1 LSB |
| Min Supply Voltage | 4.75 V |
| Supply Voltage | 5 V |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- High-Speed Conversion: The AD7777 operates at a sampling rate of 378 ksps, making it suitable for high-speed applications.
- Input Signal Conditioning: It features unique input signal conditioning capabilities, allowing for independent or simultaneous sampling of input channels.
- Flexible Input Range: The analog input range can be adjusted by setting the bias voltage (VBIAS) and swing voltage (VSWING) via the reference voltage applied to REFIN.
- Low Power CMOS Logic: Fabricated using LC2MOS technology, which combines precision bipolar circuits with low-power CMOS logic.
- Ease of Interface: Easily interfaced to a standard 16-bit microprocessor unit bus via its 10-bit data port and standard microprocessor control lines.
Applications
- High-Density Hard Disk Drives: Primarily intended for use in read/write head positioning servos.
- Single-Supply Applications: Ideal for applications requiring unique input signal conditioning features.
- Industrial Automation: Can be used in various industrial automation applications requiring high-speed and precise analog-to-digital conversion.
Q & A
- What is the primary application of the AD7777ARZ-REEL?
The AD7777ARZ-REEL is primarily intended for use in read/write head positioning servos found in high-density hard disk drives.
- What is the sampling rate of the AD7777ARZ-REEL?
The sampling rate of the AD7777ARZ-REEL is 378 ksps.
- What is the package type of the AD7777ARZ-REEL?
The AD7777ARZ-REEL is available in a 28-lead, wide-body SOIC package.
- How many analog-to-digital converters does the AD7777ARZ-REEL have?
The AD7777ARZ-REEL has 4 analog-to-digital converters.
- What is the operating temperature range of the AD7777ARZ-REEL?
The operating temperature range of the AD7777ARZ-REEL is -40°C to +85°C.
- How can the input signal range be adjusted on the AD7777ARZ-REEL?
The input signal range can be adjusted by setting the bias voltage (VBIAS) and swing voltage (VSWING) via the reference voltage applied to REFIN.
- What technology is used to fabricate the AD7777ARZ-REEL?
The AD7777ARZ-REEL is fabricated using linear compatible CMOS (LC2MOS) technology.
- How is the AD7777ARZ-REEL interfaced to a microprocessor?
The AD7777ARZ-REEL is easily interfaced to a standard 16-bit microprocessor unit bus via its 10-bit data port and standard microprocessor control lines.
- What is the minimum supply voltage for the AD7777ARZ-REEL?
The minimum supply voltage for the AD7777ARZ-REEL is 4.75 V.
- Can the input channels be sampled independently or simultaneously?
Yes, the input channels can be sampled independently or simultaneously by setting a bit in the control register.
