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LTC1967CMS8#TRPBF
MSOP-8 (3x3mm)
The LTC1967CMS8#TRPBF from Analog Devices is a precision RMS-to-DC converter using delta-sigma topology with 500kHz bandwidth and 0.1% accuracy in MSOP-8.
| Package | MSOP-8 (3x3mm) |
The LTC1967CMS8#TRPBF from Analog Devices is a precision RMS-to-DC converter using delta-sigma topology with 500kHz bandwidth and 0.1% accuracy in MSOP-8.
The LTC1967CMS8#TRPBF is a delta-sigma RMS-to-DC converter from Analog Devices in MSOP-8, with 500kHz bandwidth and +/-0.1dB accuracy. It computes the true RMS (Root Mean Square) value of an AC input signal and provides a DC output voltage proportional to the RMS input. The core uses a proprietary delta-sigma demodulator architecture: the input signal is first squared by a Gilbert cell multiplier, then fed into a delta-sigma modulator that converts the squared signal into a 1-bit stream. The output low-pass filter (a single external capacitor on the OUT pin) extracts the DC component (average of the squared signal), and an internal square-root circuit produces the RMS result. This approach is more accurate than the log-antilog method used in older RMS-to-DC converters (AD736) because it eliminates the temperature drift of the log/antilog circuits. The 500kHz bandwidth allows measurement of signals up to 500kHz at +/-1% accuracy. The single-capacitor output filter simplifies design: a 1uF capacitor provides 0.01% ripple at 60Hz. The EN pin (active HIGH, internal pull-up) disables the device to reduce current from 350uA to 0.1uA. Applications include AC voltage measurement, power metering, and audio level detection.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | Power | Supply (2.7-5.5V) |
| 2 | GND | Power | Ground |
| 3 | IN2 | Input | Differential input 2 (high side) |
| 4 | IN1 | Input | Differential input 1 (low side) |
| 5 | NC | – | No connect |
| 6 | OUT | Output | RMS-DC output voltage (DC proportional to RMS input) |
| 7 | NC | – | No connect |
| 8 | EN | Input | Enable (active high, internal pull-up) |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| Analog Devices | LTC1966CMS8#TRPBF | MSOP-8 | 800kHz bandwidth, lower speed version |
| Analog Devices | AD736JNZ | DIP-8 | Classic RMS-to-DC converter, 50kHz bandwidth |
| Analog Devices | LTC1968CMS8#TRPBF | MSOP-8 | 10MHz bandwidth, high-speed version |
| Maxim | MX536AJCWE+ | SOIC-16 | RMS-to-DC, 600kHz bandwidth |
| Analog Devices | AD8436BCPZ-WP | LFCSP-16 | RMS-to-DC, 1MHz, 0.1dB accuracy |
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
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