Datasheet LTC5583 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Matched Dual-Channel 6GHz RMS Power Detector |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Output Voltage … |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Output Voltage and Linearity Error. vs RF Input Power, 2140MHz CW
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LTC5583 Matched Dual-Channel 6GHz RMS Power Detector
FEATURES DESCRIPTION
n Frequency Range: 40MHz to 6GHz The LTC®5583 is a dual-channel RMS power detector, n Linear Dynamic Range: Up to 60dB capable of measuring two AC signals with wide dynamic n ±0.5dB (Typ) Accuracy Over Temperature range, from –59dBm to 4dBm, depending on frequency. n 40dB Channel-to-Channel Isolation at 2GHz Even Each AC signal’s power in decibel-scaled value is precisely with Single-Ended RF Inputs converted to a DC voltage on a linear scale, independent n Matched Dual-Channel Outputs: <1.25dB (Typ) of the crest factor of the input signal waveforms. The n Single-Ended RF Inputs—No Transformer Required LTC5583 is suitable for precision power measurement and n Accurate RMS Power Measurement of High Crest level control for a variety of RF standards, including LTE, Factor Modulated Waveforms EDGE, W-CDMA, CDMA2000, TD-SCDMA, and WiMAX. n Difference Output Provides VSWR Measurement Good channel-to-channel isolation is necessary for oper- n Fast Envelope Detector Outputs ating the dual channels simultaneously. For applications n Fast Response Time: 140ns Rise Time where the two input signals are at the same frequency (e.g. n Small 4mm × 4mm QFN24 Package measuring VSWR), the LTC5583 provides 40dB isolation at 2.14GHz even with single-ended inputs. No baluns are
APPLICATIONS
needed. When the two input signals are at different frequen- cies, the isolation can be as high as 50dB. The isolation n VSWR Monitor can be improved to >55dB with differential inputs. n MIMO Transmit Power Control n Basestation PA Control The power difference of the two input signals is provided n Transmit and Receive Gain Control at a difference output pin. Each channel also has a fast n RF Instrumentation envelope detector, which tracks the RF input signal’s en- velope and outputs a voltage directly proportional to the L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. signal’s instantaneous power. The envelope detectors can Protected by U.S. Patents including 7262661, 7317357, 7622981. be disabled to reduce power consumption.
TYPICAL APPLICATION Output Voltage and Linearity Error vs RF Input Power, 2140MHz CW Block Diagram Inputs, Single-Ended Drive
2.5 2.5 IN+A IN–A 2.0 ENVA VOA 2.0 1.5 LINEARITY ERROR (dB) ENVELOPE RMS DETECT DETECT 1.0 1.5 0.5 + (V) VODF OB 0 , V OAV 1.0 –0.5 – 85°C, CH A ENVB –1.0 DIFFERENCE 85°C, CH B 25°C, CH A ENVELOPE RMS AMPLIFIER V 0.5 –1.5 OB 25°C, CH B DETECT DETECT –40°C, CH A –2.0 –40°C, CH B 0 –2.5 LTC5583 IN+B IN–B INV VOS –65 –55 –45 –35 –25 –15 –5 5 INPUT POWER (dBm) 5583 BD 5583 TA01b 5583fa 1
FEATURES DESCRIPTION
n Frequency Range: 40MHz to 6GHz The LTC®5583 is a dual-channel RMS power detector, n Linear Dynamic Range: Up to 60dB capable of measuring two AC signals with wide dynamic n ±0.5dB (Typ) Accuracy Over Temperature range, from –59dBm to 4dBm, depending on frequency. n 40dB Channel-to-Channel Isolation at 2GHz Even Each AC signal’s power in decibel-scaled value is precisely with Single-Ended RF Inputs converted to a DC voltage on a linear scale, independent n Matched Dual-Channel Outputs: <1.25dB (Typ) of the crest factor of the input signal waveforms. The n Single-Ended RF Inputs—No Transformer Required LTC5583 is suitable for precision power measurement and n Accurate RMS Power Measurement of High Crest level control for a variety of RF standards, including LTE, Factor Modulated Waveforms EDGE, W-CDMA, CDMA2000, TD-SCDMA, and WiMAX. n Difference Output Provides VSWR Measurement Good channel-to-channel isolation is necessary for oper- n Fast Envelope Detector Outputs ating the dual channels simultaneously. For applications n Fast Response Time: 140ns Rise Time where the two input signals are at the same frequency (e.g. n Small 4mm × 4mm QFN24 Package measuring VSWR), the LTC5583 provides 40dB isolation at 2.14GHz even with single-ended inputs. No baluns are
APPLICATIONS
needed. When the two input signals are at different frequen- cies, the isolation can be as high as 50dB. The isolation n VSWR Monitor can be improved to >55dB with differential inputs. n MIMO Transmit Power Control n Basestation PA Control The power difference of the two input signals is provided n Transmit and Receive Gain Control at a difference output pin. Each channel also has a fast n RF Instrumentation envelope detector, which tracks the RF input signal’s en- velope and outputs a voltage directly proportional to the L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. signal’s instantaneous power. The envelope detectors can Protected by U.S. Patents including 7262661, 7317357, 7622981. be disabled to reduce power consumption.
TYPICAL APPLICATION Output Voltage and Linearity Error vs RF Input Power, 2140MHz CW Block Diagram Inputs, Single-Ended Drive
2.5 2.5 IN+A IN–A 2.0 ENVA VOA 2.0 1.5 LINEARITY ERROR (dB) ENVELOPE RMS DETECT DETECT 1.0 1.5 0.5 + (V) VODF OB 0 , V OAV 1.0 –0.5 – 85°C, CH A ENVB –1.0 DIFFERENCE 85°C, CH B 25°C, CH A ENVELOPE RMS AMPLIFIER V 0.5 –1.5 OB 25°C, CH B DETECT DETECT –40°C, CH A –2.0 –40°C, CH B 0 –2.5 LTC5583 IN+B IN–B INV VOS –65 –55 –45 –35 –25 –15 –5 5 INPUT POWER (dBm) 5583 BD 5583 TA01b 5583fa 1
