Overview
The LMF100CIWMX/NOPB is a high-performance dual switched capacitor filter produced by Texas Instruments. This device is part of the LMF100 series, which offers advanced filtering capabilities in a compact and cost-effective package. The LMF100 is designed to replace active RC filters with improved accuracy and tunability, and it is pin-compatible with the industry-standard MF10 but provides significantly enhanced performance.
The device consists of two independent general-purpose, high-performance switched capacitor filters. Each filter block can realize various second-order and first-order filtering functions, including allpass, highpass, notch, bandpass, and lowpass configurations. The center frequency of each filter stage can be tuned using an external clock or a combination of a clock and resistors.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage | V | 4 | - | 15 |
| Operating Temperature | °C | -40 | - | 85 |
| Clock Frequency | Hz | 5 | - | 1,500,000 |
| Offset Voltage (Vos1, Vos2, Vos3) | mV | ±5, ±15, ±15 | - | ±70, ±70, ±60 |
| Crosstalk | dB | -60 | - | -60 |
| Output Noise (20 kHz Bandwidth) | µV | 300 (LP), 320 (BP) | - | - |
| Package Type | - | - | - | 20-SOIC |
| Junction-to-Ambient Thermal Resistance (RθJA) | °C/W | - | - | 63.8 |
Key Features
- Wide 4-V to 15-V power supply range
- Operation up to 100 kHz and fo x Q range up to 1.8 MHz
- Low offset voltage: typically ±5 mV, ±15 mV, and ±15 mV for Vos1, Vos2, and Vos3 respectively
- Low crosstalk: -60 dB
- Pin-compatible with the MF10 but with improved performance
- Configurable filter modes: allpass, highpass, notch, bandpass, and lowpass
- External clock or clock and resistor tuning for center frequency
- High-performance CMOS technology (LMCMOS™)
Applications
- Replacing active RC filters with reduced form factors and higher accuracy
- An alternative to integrated continuous time filters
- Audio and communication systems
- Instrumentation and medical devices
- Telemetry and industrial applications
Q & A
- What is the LMF100CIWMX/NOPB?
The LMF100CIWMX/NOPB is a high-performance dual switched capacitor filter produced by Texas Instruments.
- What is the power supply range of the LMF100?
The LMF100 operates over a wide 4-V to 15-V power supply range.
- What are the typical offset voltages for the LMF100?
The typical offset voltages are ±5 mV, ±15 mV, and ±15 mV for Vos1, Vos2, and Vos3 respectively.
- What is the maximum clock frequency for the LMF100?
The maximum clock frequency is 1,500,000 Hz.
- Is the LMF100 pin-compatible with other devices?
Yes, it is pin-compatible with the MF10 but offers improved performance.
- What types of filtering functions can the LMF100 perform?
The LMF100 can perform allpass, highpass, notch, bandpass, and lowpass filtering functions.
- How is the center frequency of the filter stages tuned?
The center frequency can be tuned using an external clock or a combination of a clock and resistors.
- What is the thermal resistance of the SOIC package?
The junction-to-ambient thermal resistance (RθJA) for the SOIC package is 63.8 °C/W.
- What are some common applications of the LMF100?
Common applications include audio and communication systems, instrumentation, medical devices, telemetry, and industrial applications.
- Is the LMF100CIWMX/NOPB still in production?
No, the LMF100CIWMX/NOPB is obsolete and no longer manufactured.
