Showing posts with label Mixed. Show all posts
Showing posts with label Mixed. Show all posts

Wednesday, June 03, 2015

ICL7107 DPM and DVM chip from Intersil

The Intersil ICL7106 and ICL7107 are high performance, low power, 31/2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the ICL7107 will directly drive an instrument size light emitting diode (LED) display.

ICL7107 DPM and DVM chip from Intersil

ICL7107 DPM and DVM chip from Intersil

  • Guaranteed Zero Reading for 0V Input on All Scales
  • True Polarity at Zero for Precise Null Detection
  • 1pA Typical Input Current
  • True Differential Input and Reference, Direct Display Drive
  • LCD ICL7106, LED lCL7107
  • Low Power Dissipation - Typically Less Than 10mW
Ananth -

ICL7109 12-Bit A/D Converter with 3-State Binary Outputs

This is one of the first mixed CMOS IC, I used it after studying Intersil CMOS Hot Ideas Book. It is also the most widely used Display chip. Many Millions of Instruments are built using this chip both in Instrumentation and Industrial Automation. The ICL7106 was most popular in Hand Held DMM's and Clamp Meters as it used to drive a LCD Display. ICL7109 was to interface with Digital Comparators and Microprocessors.

Friday, February 06, 2015

Quad-Differential-Comparator-LM339-TI

These 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.

Quad General Purpose Differential Comparator - LM339

An application from an old TI datasheet showing the versatility of this comparator. For me it was a workhorse and like LM324 was used in many products.

Quad General Purpose Differential Comparator - LM339 
Current drain is independent of the supply voltage. The outputs can be connected to other open-collector outputs to achieve wired-AND relationships.

Differential to TTL convertor using LM339
  • Single Supply or Dual Supplies
  • Wide Range of Supply Voltage:
  • Low Supply-Current Drain Independent of Supply Voltage... 0.8 mA Typ
  • Low Input Bias Current ...25 nA Typ
  • Low Input Offset Voltage . . . 2 mV Typ
  • Common-Mode Input Voltage Range Includes Ground
  • Differential Input Voltage Range Equal to Maximum-Rated Supply Voltage . . . ±36 V
  • Low Output Saturation Voltage
  • Output Compatible With TTL, MOS, and CMOS

Monday, December 24, 2012

Cirrus Logic - Analog and Mixed-signal

Cirrus Logic - Analog and Mixed-signal

Cirrus Logic is recognized worldwide for its expertise in developing high-precision analog and mixed-signal integrated circuits (ICs) for a broad range of consumer and industrial markets. The most respected brands in the audio and industrial markets such as Bose, Harman International, IO, Onkyo, Marantz, Panasonic, Philips, Pioneer, Samsung and Sony rely on Cirrus Logic technology.

Founded in 1984 with headquarters in Austin, Texas, Cirrus Logic is fabless.

Cirrus Logic's CS161x family of LED driver ICs for TRIAC dimmer systems solves the global challenges of dimmer compatibility.

CRD1611 Reference Design Board and the CS161x Chip With LED Lamp

CS161x family of LED driver ICs for TRIAC dimmer systems

The CS1610/11/12/13 digital control ICs are engineered to deliver a high-efficiency, cost effective, flicker-free, phase-dimmable, solid state lighting (SSL) solution for the incandescent lamp replacement market.

Cirrus Logic, Inc.
800 West 6th Street, Austin, Texas 78701, United States

Monday, October 01, 2007

LM311 - Voltage Comparator

The LM111, LM211 and LM311 are voltage comparators that have input currents nearly a thousand times lower than devices like the LM106 or LM710. They are also designed to operate over a wider range of supply voltages: from standard ±15V op amp supplies down to the single 5V supply used for IC logic.

LM311 - Voltage Comparator

LM311 - Voltage Comparator

Both the inputs and the outputs of the LM111, LM211 or the LM311 can be isolated from system ground, and the output can drive loads referred to ground, the positive supply or the negative supply. Offset balancing and strobe capability are provided and outputs can be wire ORed.
  • Operates from single 5V supply
  • Input current: 150 nA max. over temperature
  • Offset current: 20 nA max. over temperature
  • Differential input voltage range: ±30V
  • Power consumption: 135 mW at ±15V
Related Resources -

Voltage Comparator Information And Circuits

This page provides basic information about voltage comparator integrated circuits and is to act as reference material for other circuits. The circuits shown are based on the LM339 Quad Voltage Comparator chip or the LM393 Dual Voltage Comparator chip. These devices are functionally the same. The LM311 Voltage Comparator can be used for these applications as well but it also has a number of unique features.

Comparators and Schmitt Triggers

An LM311 in a comparator circuit is shown at the right, with the pin numbers for the connections. The open-collector output is at pin 7, and the ground for this transistor is at pin 1. It is shown pulled up to the logic voltage of +5 with a 1k resistor, which is typical. The output of the LM311 can sink 8 mA. A comparator's output is essentially binary, YES or NO.

Thursday, July 05, 2007

LF398 - Monolithic Sample and Hold Circuit

LF398 - Monolithic Sample and Hold Circuit
The LF198/LF298/LF398  are monolithic sample-and-hold circuits which utilize BI-FET technology to obtain ultra-high dc accuracy with fast acquisition of signal and low droop rate. Operating as a unity gain follower, dc gain accuracy is 0.002% typical and acquisition time is as low as 6 µs to 0.01%. A bipolar input stage is used to achieve low offset voltage and wide bandwidth. Input offset adjust is accomplished with a single pin, and does not degrade input offset drift. The wide bandwidth allows the LF198 to be included inside the feedback loop of 1 MHz op amps without having stability problems. Input impedance of 1010Ohm allows high source impedances to be used without degrading accuracy.
P-channel junction FET's are combined with bipolar devices in the output amplifier to give droop rates as low as 5 mV/min with a 1 µF hold capacitor. The JFET's have much lower noise than MOS devices used in previous designs and do not exhibit high temperature instabilities. The overall design guarantees no feed-through from input to output in the hold mode, even for input signals equal to the supply voltages.

Related Circuits and Projects

Tuesday, July 03, 2007

LM3914 - Dot Bar Display Driver

The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. This feature is one that allows operation of the whole system from less than 3V.

LM3914 - Versatile and Easy use Display
  • Drives LEDs, LCDs or vacuum fluorescents
  • Bar or dot display mode externally selectable by user
  • Expandable to displays of 100 steps
  • Internal voltage reference from 1.2V to 12V
  • Operates with single supply of less than 3V
  • LED driver outputs are current regulated, open-collectors
The circuit contains its own adjustable reference and accurate 10-step voltage divider. The low-bias-current input buffer accepts signals down to ground, or V-, yet needs no protection against inputs of 35V above or below ground. The buffer drives 10 individual comparators referenced to the precision divider. Indication non-linearity can thus be held typically to ½%, even over a wide temperature range.

My LM3914 Circuits

Millivolt Meter using a LM3914 LED Dot Display
Millivolt Meter using a LM3914 LED Dot Display