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Part Name(s) : ML2008 ML2009 ML2008IP ML2008IQ ML2008CP ML2008CQ ML2009IP ML2009IQ ML2009CP ML2009CQ Micro-Linear
Micro Linear Corporation
Description : µP Compatible Logarithmic Gain/Attenuator View

The ML2008 and ML2009 are digitally controlled Logarithmic Gain/Attenuators with a range of –24 to +24dB in 0.1dB steps.
Easy interface to microprocessors is provided by an input latch and control signals consisting of chip select and write.

■ Low noise 0dBrnc max with +24dB gain
■ Low harmonic distortion –60dB max
■ Gain range –24 to +24dB
■ Resolution 0.1dB steps
■ Flat frequency response ±0.05dB from 0.3-4kHz ±0.10dB from 0.1-20kHz
■ Low supply current 4mA max from ±5V supplies
■ TTL/CMOS Compatible digital interface
■ ML2008 is designed to interface to an 8-bit data bus; ML2009 to 16-bit data bus

Part Name(s) : ML2003 ML2003C ML2003CP ML2003CQ ML2003CX ML2003I ML2003IQ ML2003IX ML2004 ML2004C Fairchild
Fairchild Semiconductor
Description : Logarithmic Gain/Attenuator View

General Description

The ML2003 and ML2004 are digitally controlled logarith mic Gain/Attenuators with a range of –24 to +24 dB in 0.1 dB steps.

The gain settings are selected by a 9-bit digital word. The ML2003 digital interface is either parallel or serial. The ML2004 is packaged in a 14-pin DIP with a serial interface only.


• Low noise: 0 dBrnc max with +24dB gain

• Low harmonic distortion: -60dB max

• Gain range: –24 to +24dB

• Resolution: 0.1dB steps

• Flat frequency response:

±0.05dB from .3–4 kHz

±0.10dB from .1-20 kHz

• Low supply current 4mA max from ±5V supplies

• TTL/CMOS Compatible digital interface

• ML2003 has pin selectable serial or parallel interface;

   ML2004 serial interface only

Part Name(s) : ML2003 ML2003CP ML2003CQ ML2003IP ML2003IQ ML2004 ML2004CP ML2004IP Micro-Linear
Micro Linear Corporation
Description : Logarithmic Gain/Attenuator View
Part Name(s) : TDA8783M Philips
Philips Electronics
Description : True Logarithmic amplifier View


The TDA8780M is a true Logarithmic amplifier intended for dynamic range reduction of IF signals at 10.7 MHz in digital radio receivers. It offers true Logarithmic characteristics over a 72 dB input dynamic range, has a small-signal gain-adjustment facility and a constant limiting output voltage for large input levels.


• 72 dB true Logarithmic dynamic range

• Small-signal gain-adjustment facility

• Constant limiting output voltage

• Temperature and DC power supply voltage independent

• Easy interfacing to analog-to-digital converters

• Output DC level shift facility.


• Dynamic range compression

• IF signal dynamic range reduction in digital receivers

• Compression receivers.

Part Name(s) : U4314B U4314B-AFP Temic
Temic Semiconductors
Description : Logarithmic AM Demodulator / RSSI View


The U4314B is a monolithic Integrated Circuit in bipolar technology for low current super-heterodyne receivers. It can be used as a Logarithmic Received Signal Strength Indicator (RSSI) or as a Logarithmic AM demodulator. Its bandwidth is optimized for intermediate frequencies of 9 to 10.7 MHz (see figure 9).


Logarithmic RSSI / AM demodulator output

Sensitive  IF-amplifier for 10.7 MHz operating frequency

Usable for ASK data systems up to several hundred kBauds

Extreme low current consumption typically 0.8 mA

Wide power supply voltage range 3 to 12 V

Temperature compensated reference voltage of 2.4 V externally available

Only one additional part (capacitor) necessary

ESD hardened

Part Name(s) : NTE1792 NTE-Electronic
NTE Electronics
Description : Integrated Circuit Dual Attenuator View


The NTE1792 is a silicon monolithic integrated circuit in a 9–Lead SIP package designed for sound control applications.


• Two separate attenuators

• The characteristic control curve is linear against Logarithmic output.

• Channel Separation: 64dB MIN

• Typical Application: Sound MPX attenuator for TV, Radio and mobile receiver.


Part Name(s) : AD641 AD641A AD641S AD641AN AD641AP 5962-9559801MRA AD641-EB AD
Analog Devices
Description : 250 MHz Demodulating Logarithmic Amplifier View

The AD641 is a 250 MHz, demodulating Logarithmic amplifier with an accuracy of ±2.0 dB and 44 dB dynamic range. The AD641 uses a successive detection architecture to provide an output current that is Logarithmically proportional to its input voltage.

    Logarithmic Amplifier Performance
        Usable to 250 MHz
        44 dB Dynamic Range
        ±2.0 dB Log Conformance
        37.5 mV/√dB Voltage Output
        Stable Slope and Intercepts
    2.0 nV/√Hz Input Noise Voltage
    50 μV Input Offset Voltage
    Low Power
        ±5 V Supply Operation
        9 mA (+VS), 35 mA (–VS) Quiescent Current
    Onboard Resistors
    Onboard 103x Attenuator
    Dual Polarity Current Outputs
    Direct Coupled Differential Signal Path

    IF/RF Signal Processing
    Received Signal Strength Indicator (RSSI)
    High Speed Signal Compression
    High Speed Spectrum Analyzer

Part Name(s) : AD606 AD606-EB AD606JCHIPS AD606JN AD606JR AD606JR-REEL AD606JR-REEL7 ADI
Analog Devices
Description : 50 MHz, 80 dB Demodulating Logarithmic Amplifier with Limiter Output View


The AD606 is a complete, monolithic Logarithmic amplifier using a 9-stage “successive-detection” technique. It provides both Logarithmic and limited outputs. The Logarithmic output is from a three-pole post-demodulation low-pass filter and provides a loadable output voltage of +0.1 V dc to +4 V dc. The Logarithmic scaling is such that the output is +0.5 V for a sinusoidal input of –75 dBm and +3.5 V at an input of +5 dBm; over this range the Logarithmic linearity is typically within ±0.4 dB. All scaling parameters are proportional to the supply voltage.

The AD606 can operate above and below these limits, with reduced linearity, to provide as much as 90 dB of conversion range. A second low-pass filter automatically nulls the input offset of the first stage down to the submicrovolt level. Adding external capacitors to both filters allows operation at input frequencies as low as a few hertz.


  Logarithmic Amplifier Performance

     –75 dBm to +5 dBm Dynamic Range

     ≤1.5 nV/√Hz Input Noise

     Usable to >50 MHz

     37.5 mV/dB Voltage Output

     On-Chip Low-Pass Output Filter

  Limiter Performance

     61 dB Output Flatness over 80 dB Range

     638 Phase Stability at 10.7 MHz over 80 dB Range

     Adjustable Output Amplitude

  Low Power

     +5 V Single Supply Operation

     65 mW Typical Power Consumption

     CMOS-Compatible Power-Down to 325 mW typ

     <5 ms Enable/Disable Time


  Ultrasound and Sonar Processing

  Phase-Stable Limiting Amplifier to 100 MHz

  Received Signal Strength Indicator (RSSI)

  Wide Range Signal and Power Measurement


Part Name(s) : ML2036 ML2036CP ML2036CS ML2036IP ML2036IS Micro-Linear
Micro Linear Corporation
Description : Serial Input Programmable Sine Wave Generator with Digital Gain Control View


The ML2036 is a monolithic sine wave generator whose output is programmable from DC to 50kHz. No external components are required. The frequency of the sinewave output is derived from either an external crystal or clock input, providing a stable and accurate frequency reference. The frequency is programmed by a 16-bit serial data word.


Programmable output frequency - DC to 50kHz

Low gain error and total harmonic distortion

3-wire SPI Compatible serial microprocessor interface with double buffered data latch

Fully integrated solution - no external components required

Frequency resolution of 1.5Hz (±0.75Hz) with a 12MHz clock input

Onboard 3 to 12MHz crystal oscillator

Clock outputs of 1/2 or 1/8 of the input clock frequency

Synchronous or asynchronous data loading capability

Compatible with ML2031 and ML2032 tone detectors and ML2004 Logarithmic Gain/Attenuator

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