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AD8317
PRODUCTION1 MHz to 10 GHz, 55 dB Log Detector/Controller
- Part Models
- 4
- 1ku List Price
- Starting From $5.63
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Overview
- Wide bandwidth: 1 MHz to 10 GHz
- High accuracy: ±1.0 dB over temperature
- 55 dB dynamic range up to 8 GHz ± 3 dB error
- Stability over temperature: ±0.5 dB
- Low noise measurement/controller output, VOUT
- Pulse response time: 6 ns/10 ns (fall/rise)
- Small footprint, 2 mm × 3 mm LFCSP
- Supply operation: 3.0 V to 5.5 V at 22 mA
- Fabricated using high speed SiGe process
The AD8317 is a demodulating logarithmic amplifier, capable of accurately converting an RF input signal to a corresponding decibel-scaled output. It employs the progressive compression technique over a cascaded amplifier chain, each stage of which is equipped with a detector cell. The device can be used in either measurement or controller modes. The AD8317 maintains accurate log conformance for signals of 1 MHz to 8 GHz and provides useful operation to 10 GHz. The input dynamic range is typically 55 dB (referenced to 50 Ω) with less than ±3 dB error. The AD8317 has 6 ns/10 ns response time (fall time/rise time) that enables RF burst detection to a pulse rate of beyond 50 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature conditions. A supply of 3.0 V to 5.5 V is required to power the device. Current consumption is typically 22 mA, and it decreases to 200 μA when the device is disabled.
The AD8317 can be configured to provide a control voltage to a power amplifier or a measurement output from the VOUT pin. Because the output can be used for controller applications, special attention has been paid to minimize wideband noise. In this mode, the setpoint control voltage is applied to the VSET pin.
The feedback loop through an RF amplifier is closed via VOUT, the output of which regulates the output of the amplifier to a magnitude corresponding to VSET. The AD8317 provides 0 V to (VPOS − 0.1 V) output capability at the VOUT pin, suitable for controller applications. As a measurement device, VOUT is externally connected to VSET to produce an output voltage, VOUT, that is a decreasing linear-in-dB function of the RF input signal amplitude.
The logarithmic slope is –22 mV/dB, determined by the VSET interface. The intercept is 15 dBm (referenced to 50 Ω, CW input) using the INHI input. These parameters are very stable against supply and temperature variations.
The AD8317 is fabricated on a SiGe bipolar IC process and is available in a 2 mm × 3 mm, 8-lead LFCSP with an operating temperature range of –40°C to +85°C.
Applications
- RF transmitter PA setpoint control and level monitoring
- Power monitoring in radio link transmitters
- RSSI measurement in base stations, WLANs, WiMAX, and radars
Documentation
Data Sheet 1
Application Note 2
Technical Articles 7
Evaluation Design File 1
Frequently Asked Question 1
Product Selection Guide 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8317ACHIPS | DIE | ||
| AD8317ACPZ-R2 | 8-Lead LFCSP (3mm x 2mm x 0.75mm w/ EP) | ||
| AD8317ACPZ-R7 | 8-Lead LFCSP (3mm x 2mm x 0.75mm w/ EP) | ||
| AD8317ACPZ-WP | 8-Lead LFCSP (3mm x 2mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Nov 4, 2015 - 15_0048 Conversion of 2x3mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines |
||
| AD8317ACPZ-R2 | PRODUCTION | |
| AD8317ACPZ-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
ADIsimPLL™
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
Open ToolADIsimRF
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
Open ToolEvaluation Kits
AD8317 Evaluation Board