Amplifiers & Comparators

The LTC6090HS8E#PBF is a high voltage precision monolithic Operational Amplifier for use with high voltage regulators. The LTC6090 is unity gain stable. The LTC6090-5 is stable in noise gain configurations of 5 or greater. Amplifier feature high open loop gain, low input referred offset voltage and noise, pA input bias current and ideal for high voltage, high impedance buffering and/or high gain configurations. The amplifier is internally protected against over-temperature conditions. A thermal warning output, TFLAG, goes active when the die temperature approaches 150°C. The output stage may be turned off with the output disable pin OD. By tying the OD pin to the thermal warning output (TFLAG), the part will disable the output stage when it is out of the safe operating area. These pins easily interface to any logic family. Amplifier may be run from a single 140V or spit ±70V power supplies and are capable of driving up to 200pF of load capacitance.

• ±4.75 to ±70V (140V) Supply range
• 50pA Maximum input bias current
• 1.25mV Maximum low offset voltage
• ±5μV/°C Maximum low offset drift
• 130dB Minimum CMRR
• Rail-to-rail output stage
• 50mA Output sink and source
• 11nV/√Hz Noise density
• Thermal shutdown

The AD8021ARZ is a Low Noise High Speed Voltage Feedback Amplifier that can be used in 16-bit resolution systems. It is designed to have both low voltage and low current noise (2.1nV/√Hz typical and 2.1pA/√Hz typical) while operating at the lowest quiescent supply current (7mA at ±5V) among today’s high speed, low noise op amps. An output disable pin allows further reduction of the quiescent supply current to 1.3mA. The AD8021 allows the user to choose the gain bandwidth product that best suits the application. It is also capable of driving a 75R line with ±3V video signals. The AD8021 is both technically superior and priced considerably less than comparable amps drawing much higher quiescent current. It is a high speed general-purpose amplifier, ideal for a wide variety of gain configurations and can be used throughout a signal processing chain and in control loops.

• Low noise
• Constant bandwidth from G = -1 to G = -10
• High speed
• 34mW or 6.7mA Typical low power for 5V supply
• Low distortion
• 1mV Maximum input offset voltage
• 0.5µV/°C Input offset voltage drift

The AD8244BRMZ is a low power FET input quad Unity-gain Buffer designed to isolate very large source impedances from the rest of the signal chain. The 2pA maximum bias current, near zero current noise and 10 TΩ input impedance introduce almost no error, even with source impedance well into the megaohms. Many traditional operational amplifier pinouts have a supply pin that is next to the non-inverting input. A guard trace must be routed between these pins to avoid leakage currents much larger than the bias current of a FET input op amp. The AD8244 solves this problem with unique pinout that physically separates the high impedance inputs from the low impedance supplies and outputs of the other buffers. The AD8244 design is focused on solving problems specific to buffers. This includes close channel-to-channel matching which allows channels of the AD8244 to be used in differential signal chains with minimal error.

• Extremely high input impedance
• Low noise
• High DC precision – 3μV/°C maximum offset drift (B grade)
• No leakage from inputs to supply pins
• Provides guarding capability
• Rail-to-rail output
• Single-supply operation – Input range extends to ground
• 250μA Maximum supply current per amplifier
• 2pA Maximum input bias current at 25°C

The AD8418 is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ±0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8418 offers excellent input common-mode rejection from −2 V to +70 V. The AD8418 performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, battery management, and solenoid control.

he AD8418 offers breakthrough performance throughout the −40°C to +125°C temperature range. It features a zero drift core, which leads to a typical offset drift of 0.1 µV/°C throughout the operating temperature range and the common-mode voltage range. The AD8418 is fully qualified for automotive applications and includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. The typical input offset voltage is ±200 µV. The AD8418 is offered in 8-lead MSOP and SOIC packages.

• Typical 0.1 µV/°C offset drift
• Maximum ±400 µV voltage offset over full temperature range
• 2.7 V to 5.5 V power supply operating range
• Electromagnetic interference (EMI) filters Included
• High common-mode input voltage range
• −2 V to +70 V operating
• −4 V to +85 V survival
• Initial gain = 20 V/V
• Wide operating temperature range: −40°C to +125°C
• Bidirectional operation
• Available in 8-lead SOIC and 8-lead MSOP
• Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz
• Qualified for automotive applications

The MAX2870ETJ+ is a 23.5MHz to 6000MHz fractional/ integer-N synthesizer/VCO in 32 pin TQFN package. This high performance ultra wideband phase locked loop (PLL) with integrated voltage control oscillator (VCO) is capable of operating in both integer-N and fractional-N modes. The MAX2870 is capable of synthesizing frequencies from 23.5MHz to 6GHz while maintaining superior phase noise and spurious performance when combined with an external reference oscillator and loop filter. The ultra wide frequency range is achieved with help of multiple integrated VCOs covering 3000MHz to 6000MHz and output dividers ranging from 1 to 128. The device also provides dual differential output drivers which can be independently programmable to deliver -4dBm to +5dBm output power. Both outputs can be muted by either software or hardware control. The MAX2870 is used in test and measurement, satellite communications and PMAR/LMAR/public safety radio.

• Supply voltage range is 3V to 3.6V
• Operating temperature range from -40°C to 85°C
• Manual or automatic VCO selection
• Output binary buffers/dividers for extended frequency range
• Wide frequency PLL with integrated VCO simplifies signal chain & improves performance
• 105MHz in integer-N mode and 50MHz in fractional-N mode
• Reference frequency up to 200MHz and VCO phase noise of -149dBc/Hz at 5MHz offset (VCO at 3000MHz)
• Analogue and digital lock detect indicators, hardware and software shutdown control
• Controlled by 3-wire serial interface and compatible with 1.8V control logic
• In-band noise floor of -226.4 dBc/Hz and 1/f noise of -116dBc/Hz

The LT1677CN8#PBF is a lowest noise performance Operational Amplifier for use with tape head preamplifiers. Available for a rail-to-rail operational amplifier, 3.2nV/√Hz wideband noise, 1/f corner frequency of 13Hz and 90nV peak-to-peak 0.1Hz to 10Hz noise. Low noise is combined with outstanding precision is 20μV offset voltage and 0.2μV/°C drift, 130dB common mode, power supply rejection and 7.2MHz gain bandwidth product. The common mode range exceeds the power supply by 100mV. The voltage gain of the LT1677 is extremely high, 19 million (typical) driving a 10k load. In the design, processing and testing of the device, particular attention has been paid to the optimization of the entire distribution of several key parameters. Consequently, the specifications have been spectacularly improved compared to competing rail-to-rail amplifiers.

• 60μV Maximum offset voltage
• 0.2μV/°C Typical Low VOS Drift
• 20nA Maximum low input bias current
• 3 to ±18V Wide supply range
• 109dB Minimum high CMRR
• 108dB Minimum high PSRR

The MAX4063 is a differential-input microphone preamplifier optimized for high-performance, portable applications. The device features two selectable inputs, differential outputs, adjustable gain, an integrated lownoise bias source, and a low-power shutdown mode. Two input paths provide both differential and singleended microphone sensing. The high-noise rejection of the differential input is ideally suited to an internal microphone where system noise and long-run PC board traces can degrade low-level signals. The single-ended input provides a simple connection to an external microphone.

The differential and single-ended inputs have independent, adjustable gains that are set with a single external resistor. Differential outputs provide a full-scale signal of up to 6VP-P from a single 3V supply, optimizing the dynamic range of the amplified signal. A complete shutdown mode reduces the supply current to only 0.3µA and disables the microphone bias for the ultimate in power savings. The MAX4063 operates from 2.4V to 5.5V and is specified over the extended -40°C to +85°C operating temperature range. The MAX4063 is available in both 16-pin TQFN (4mm x 4mm x 0.8mm) and 14-pin TSSOP packages.

The MCP6292-E/MS is a 10MHz rail-to-rail Operational Amplifier provides wide bandwidth for the current. It features a gain bandwidth product (GBWP) and a 65° phase margin. This family also operates from a single supply voltage as low as 2.4V, while drawing 1mA (typical) quiescent current. Additionally, the MCP6291 supports rail-to-rail input and output swing, with a common mode input voltage range of +300mV VDD to -300mV VSS. This family of operational amplifiers is designed with an advanced CMOS process.

• ±3mV Maximum input offset voltage
• 65dB (typical) Common mode rejection ratio
• 70dB Typical power supply rejection ratio

These devices consist of two independent, high-gain, frequency-compensated operational amplifiers designed to operate from a single supply over a wide range of voltages. Operation from split supplies also is possible if the difference between the two supplies is 3 V to 32 V, and VCC is at least 1.5 V more positive than the input common-mode voltage. The low supply-current drain is independent of the magnitude of the supply voltage.

• Wide supply voltage ranges
• Low supply-current drain independent of supply voltage
• Common-mode input voltage range includes ground, allowing direct sensing near ground
• Low input bias and offset parameters
• Internal frequency compensation

The LM124J is a low power quad Operational Amplifier designed to operate from a single power supply over a wide range of voltages. Operation from split-power supplies is also possible and the low-power supply current drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, DC gain blocks and all the conventional op-amp circuits which now can be more easily implemented in single power supply systems. For example, the LM124 series can directly operate off of the standard 5V power supply voltage which is used in digital systems and easily provides the required interface electronics without requiring the additional ±15V power supplies.

• Internally frequency compensated for unity gain
• 45nA Low input biasing current
• 2mV Low input offset voltage
• 5nA Offsets current
• Input common-mode voltage range includes ground
• Differential input voltage range equal to the power supply voltage
• Military rated

These devices consist of four independent high-gain frequency-compensated operational amplifiers that are designed specifically to operate from a single supply or split supply over a wide range of voltages.

The LMx39x and the LM2901x devices consist of four independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. Operation from dual supplies also is possible, as long as the difference between the two supplies is 2 V to 36 V, and VCC is at least 1.5 V more positive than the input common-mode voltage. Current drain is independent of the supply voltage. The outputs can be connected to other open-collector outputs to achieve wired-AND relationships.

The LM139 and LM139A devices are characterized for operation over the full military temperature range of –55°C to +125°C. The LM239 and LM239A devices are characterized for operation from –25°C to +85°C. The LM339 and LM339A devices are characterized for operation from 0°C to 70°C. The LM2901, LM2901AV, and LM2901V devices are characterized for operation from –40°C to +125°C.