Key facts
- Brand
- Analog Devices
- Model
- AD9980
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-02
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Analog Devices AN-794 Application Note AD9980 Auto-Offset
The document describes the auto-offset function of the AD9980, which calculates the required offset setting to yield a given output code during clamp. When enabled, registers 0x0B to 0x10 are used as target codes rather than offset values. The circuitry compares the output code after clamp to the target code and adjusts the offset accordingly.
The note details the changes to register definitions when auto-offset is enabled versus disabled, providing specific valid target code ranges for ground-clamped and midscale-clamped inputs. It also outlines recommended procedures for enabling auto-offset in both continuous update and hold modes, along with specific clamp timing requirements to ensure proper operation.
Analog Devices AD9980 specifications
| Resolution | 8 bits |
|---|---|
| Maximum Conversion Rate | 95 MSPS |
| Operating Temperature Range | 0 °C to 70 °C |
| Typical Power Dissipation | ≈ 950 mW |
Source: Analog Devices AD9980 High Performance 8‑Bit Display Interface Datasheet
All Analog Devices AD9980 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How is the auto-offset function enabled?
Set register 0x1B, Bit 5 to 1.
From: Analog Devices AN-794 Application Note AD9980 Auto-Offset
How much time is required for the auto-offset circuit to perform its function?
It requires from 16 to 40 data clock cycles.
From: Analog Devices AN-794 Application Note AD9980 Auto-Offset
What is the maximum conversion rate of the AD9980?
The AD9980 can convert at up to 95 MSPS.
From: Analog Devices AD9980 High Performance 8‑Bit Display Interface Datasheet
What is the operating temperature range?
The device is specified for operation from 0 °C to 70 °C.
From: Analog Devices AD9980 High Performance 8‑Bit Display Interface Datasheet