Key facts
- Brand
- Analog Devices
- Model
- AD8323
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-09
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Analog Devices AD8323 Datasheet
The AD8323 is a low‑cost, digitally controlled, variable‑gain line driver optimized for DOCSIS upstream applications such as cable modems and set‑top boxes. It provides a programmable gain range of about 53 dB in 0.75 dB steps, maintains a constant 75 Ω output impedance during power‑up and power‑down, and includes a sleep mode that reduces quiescent current to 4 mA.
The document includes full electrical specifications, pin descriptions, timing requirements, absolute maximum ratings, and layout guidelines. It also provides an evaluation board bill of materials, typical performance graphs, and application notes on SPI programming and power‑down operation.
Analog Devices AD8323 specifications
| Input Resistance (Single‑Ended) | 800 Ω |
|---|---|
| Input Resistance (Differential) | 1600 Ω |
| Gain Range | 52.5 – 54.5 dB |
| Output Noise Spectral Density (Max Gain, 10 MHz) | 34 dBmV in 160 kHz |
| Power‑Supply Operating Range | 4.75 V – 5.25 V |
| Quiescent Current (Power‑Up Mode) | 133 mA (typical) |
| Sleep Mode Current | 4 mA (typical) |
| Operating Temperature Range | -40 °C to +85 °C |
Source: Analog Devices AD8323 Datasheet
All Analog Devices AD8323 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What interface is used to program the gain of the AD8323?
Gain programming is performed via a serial peripheral interface (SPI) using the DATEN, SDATA, and CLK pins.
How does the AD8323 maintain a constant 75 Ω output impedance?
The device internally maintains a differential output impedance of 75 Ω regardless of forward or power‑down mode, eliminating the need for external termination resistors.
How is the gain programmed on the AD8323?
Gain is set with an 8‑bit serial word over an SPI interface using the DATEN, SDATA, and CLK pins.
What is the allowable supply voltage range for the AD8323?
The device operates from a single 5 V supply with an acceptable range of 4.75 V to 5.25 V.