Microchip Technology has introduced cascaded dual op-amps: the MCP627X (2 MHz), MCP628X (5 MHz) and MCP629X (10 MHz). Features of this new topology include:
* Chip select (CS) pin for both amplifiers.
* Small 8-pin packages (PDIP-8, SOIC-8, MSOP-8).
* Pinout similar to the industry standard for duals.
The two op-amps are connected in one device so they will support many application circuits. Looking at Figure 1 we see that the output of op-amp A is connected internally to the non-inverting input of op-amp B. Combining these into one pin (VOUTA/VINB+ = pin #1) makes it possible to add a CS input (pin #5) to an 8-pin package. Both op-amps function as normal op-amps.
Figure 1. Pinout configuration
The CS input helps conserve power in many popular dual op-amp applications. This pinout makes it relatively easy to modify many existing designs for these parts.
Applications
The most common application circuit supported by these devices is cascaded amplifiers, allowing for easy layout in this common application. Usually, most of the gain is produced by the first stage.
There are several interesting variations of the circuit in Figure 2 that are supported by these parts. For instance, the input op-amp (op-amp A) can be configured as an inverting amplifier, as an inverting (Miller) integrator or as a difference amplifier. The output amplifier can be set up as a unity-gain buffer to isolate the load from op-amp A. This results in an overall performance improvement when driving heavy loads (eg, 1 kilo-ohm).
Figure 2. Cascaded amplifiers
It is also possible to make a low-pass filter using just resistors (no capacitors) as in Figure 3. This is a high bandwidth, second-order filter. The resistors R1 and R2 set the DC gain, while R3 maintains stability and controls the filter Q. The filter cutoff frequency is typically 10% to 50% of the op-amp's gain bandwidth product (GBWP).
Ryzen-based computer on module Altron Arrow
AI & ML
SolidRun announced the launch of its new Ryzen V3000 CX7 Com module, configurable with the eight-core/16-thread Ryzen Embedded V3C48 processor.
Read more...Robust and customisable SBC Altron Arrow
DSP, Micros & Memory
Pairing the powerful i.MX8M Plus System on Module (SoM) from SolidRun, which features the i.MX 8M Plus SoC from NXP, this high-performance SBC is set to transform industrial environments.
Read more...New family supports future cryptography Altron Arrow
DSP, Micros & Memory
NXP has introduced its new i.MX 94 family, which contains an i.MX MPU with an integrated time-sensitive networking (TSN) switch, enabling configurable, secure communications with rich protocol support in industrial and automotive environments.
Read more...NXP’s all-purpose microcontroller series Altron Arrow
DSP, Micros & Memory
NXP has released its MCX A14x and A15x series of all-purpose microcontrollers which are part of the larger MCX portfolio that shares a common Arm Cortex-M33 core platform.
Read more...Non-terrestrial network module Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Fibocom unveiled its MA510-GL (NTN), a non-terrestrial networks module which is compliant with 3GPP Release 17 standard.
Read more...Cellular IoT connectivity via satellite Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The Telit Cinterion cellular LPWA module will enable satellite data communication using the NB-IoT protocol, without any special hardware changes required for the integration of the cellular module in the customer application.
Read more...Low noise 3-axis MEMS accelerometers Altron Arrow
DSP, Micros & Memory
The ADXL357 and ADXL357B from Analog Devices are digital outputs, low noise density, low 0 g offset drift, low power, three-axis accelerometers with selectable measurement ranges.
Read more...Infineon launches Edge Ai software solution Altron Arrow
Analogue, Mixed Signal, LSI
Infineon has introduced DEEPCRAFT, a new software solution category brand for Edge AI and machine learning, after the company recognised the huge potential of Edge AI for the market.
Read more...Cree: Illuminating the future of LED technology Altron Arrow
Editor's Choice Opto-Electronics
As a pioneer in this field, Cree LED has been instrumental in shaping the LED landscape, driving innovation and performance in this sector.
Read more...Ultra-wideband LNA Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The ADL8120 from Analog Devices is an ultra-wideband low-noise amplifier that operates from 30 kHz to 20 GHz, with typical gain and noise figure of 14 dB and 1,9 dB.
printer friendly version