Overview
The AD7778ASZ is a high-speed, 8-channel, 10-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is designed for use in high-density applications, particularly in R/W head positioning servos found in hard disk drives. It features unique input signal conditioning capabilities, making it ideal for single-supply applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 8 |
| Resolution | 10-bit |
| Supply Voltage | 5 V |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 44-Lead Metric Quad Flat Package (MQFP) |
| Input Signal Range | VBIAS ± VSWING (VBIAS = REFIN, VSWING = REFIN/2) |
| Input Resistance | 10 kΩ or greater |
| Reference Voltage Range | 1.9 V to 2.1 V (nominal 2.0 V) |
Key Features
- Fast 10-bit ADC conversion
- Half scale conversion option
- Fast interface port
- Power-down mode
- Independent or simultaneous sampling of input channels
- Onboard reference available (REFOUT) or external voltage reference (REFIN)
- Signal return path for input channels (RTN)
Applications
The AD7778ASZ is primarily used in high-density hard disk drives for R/W head positioning servos. Its unique input signal conditioning features make it suitable for various single-supply applications in instrumentation and other high-speed data acquisition systems.
Q & A
- What is the resolution of the AD7778ASZ ADC?
The AD7778ASZ has a resolution of 10 bits. - How many channels does the AD7778ASZ have?
The AD7778ASZ has 8 channels. - What is the supply voltage for the AD7778ASZ?
The supply voltage for the AD7778ASZ is 5 V. - What is the operating temperature range of the AD7778ASZ?
The operating temperature range is -40°C to +85°C. - What type of package does the AD7778ASZ come in?
The AD7778ASZ comes in a 44-Lead Metric Quad Flat Package (MQFP). - How is the input signal range defined for the AD7778ASZ?
The input signal range is defined as VBIAS ± VSWING, where VBIAS is equal to REFIN and VSWING is nominally equal to REFIN/2. - What is the input resistance of the AD7778ASZ?
The input resistance is 10 kΩ or greater. - Can the AD7778ASZ sample channels independently or simultaneously?
Yes, the AD7778ASZ can sample channels independently or simultaneously. - What is the purpose of the RTN pin on the AD7778ASZ?
The RTN pin serves as the signal return path for the input channels. - Is the AD7778ASZ RoHS compliant?
Yes, the AD7778ASZ is RoHS compliant.
