AD8317: 1 MHz to 10 GHz, 50 dB Log Detector/Controller
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 ...More
AD8317: 1 MHz to 10 GHz, 50 dB Log Detector/Controller
Product Description
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 50 dB (re: 50 Ω) with error less than ±1 dB. The AD8317 has 8 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 (re: 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
Data Sheet, Rev. A, 8/07
快速链接
- 产品数据手册 Rev B, 03/2008(pdf 775kB)
- (About Data Sheets)
- 无铅（Pb）数据
Features
- Wide bandwidth: 1 MHz to 10 GHz
- High accuracy: ±1.0 dB over temperature
- 50 dB dynamic range up to 8 GHz
- Stability over temperature: ±0.5 dB
- Low noise measurement/controller
output VOUT
- Pulse response time: 8 ns/10 ns (fall/rise)
- Small footprint, 2 mm × 3 mm LFCSP
- Supply operation: 3.0 V to 5.5 V @ 22 mA
- Fabricated using high speed SiGe process
Verified Circuits Using This Part
Verified Circuits are designed for ease of use and proven to work by ADI applications engineers. To learn more about Verified Circuits from ADI, please visit Verified Circuits Home.
Diagrams
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- 原理图符号和PCB封装
Functional Block Diagram for AD8317
1 MHz to 10 GHz, 50 dB Log Detector/Controller
Functional Block Diagram for AD8317
| Part# | Product Description | RF Frequency (MHz) | Dynamic Range (dB) | Temp Stability (dB) | Response Time (ns typ) | Voltage Supply (V) | Supply Current (max) | Package | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|
| AD606 | Limiter Output | - | 80 | - | 400 | 4.5 to 5.5 | 13 | 16-Lead DIP, 16-Lead SOIC | $22.00 |
| AD640 | Military Specified Part Available | - | 50 | ±1 | 10 | +/- 4.5 to +/- 7.5 | 44 | 20-Lead DIP, 20-Lead LCC, 20-Lead PLCC | $36.48 |
| AD641 | Military Specified Part Available | - | 44 | ±1 | 10 | +/- 4.5 to +/- 7.5 | 44 | 20-Lead DIP, 20-Lead LCC, 20-Lead PLCC | $32.82 |
| AD8302 | Dual-Channel Gain and Phase Outputs | 2,700 | 60 | ±1 | 60 | 2.7 to 5.5 | 19 | 14-Lead TSSOP | $12.14 |
| AD8306 | Military Specified Part Available | 5 to 400 | 100 | ±1 | 73 | 2.7 to 5.5 | 16 | 16-Lead SOP | $14.67 |
| AD8307 | High Dynamic Range | dc to 500 | 92 | ±1 | 400 | 2.7 to 5.5 | 8 | 8-Lead SOIC/DIP | $6.07 |
| AD8309 | Limiter Output | 5 to 500 | 100 | ±1 | 67 | 2.7 to 5.5 | 16 | 16-Lead TSSOP | $7.84 |
| AD8310 | High Dynamic Range | dc to 440 | 100 | ±1 | 15 | 2.7 to 5.5 | 8 | 8-Lead SOIC | $4.00 |
| AD8311 | Low Power for Battery Operation | 100 to 2500 | 50 | ±0.5 | 150 | 2.7 to 5.5 | 8.5 | WLCSP | $1.27 |
| AD8312 | Low Power for Battery Operation | 50 to 3500 | 45 | ±0.5 | 70 | 2.7 to 5.5 | 4.2 | WLCSP | $1.27 |
| AD8313 | Industry Standard | 100 to 2500 | 70 | ±1.25 | 40 | 2.7 to 5.5 | 14 | 8-Lead uSOIC | $7.99 |
| AD8314 | Industry Standard | 100 to 2700 | 45 | ±1 | 70 | 2.7 to 5.5 | 4.5 | 8-Lead uSOIC/CSP | $1.10 |
| AD8315 | Low Power for Battery Operation | 100 to 2500 | 50 | ±1 | 150 | 2.7 to 5.5 | 8.5 | 8-Lead uSOIC | $4.00 |
| AD8317 | Available in Die | 1 to 10000 | 55 | ±0.5 | 6 | 3 to 5.5 | 20 | 8-Lead CSP | $3.98 |
| AD8318 | Integrated Temp Sensor | 1 to 8000 | 70 | ±0.5 | 10 | 4.5 to 5.5 | 68 | 16-Lead CSP | $5.05 |