Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsLinear ICsLinear IC - Op-amp Scrambler (zero drift) PDIP 8

 2001-2012 Microchip Technology Inc. DS21463C-page 1

Features

• Low Input Offset Voltage: 0.7µV Typ

• Low Input Offset Voltage Drift: 0.05V/°C Max

• Low Input Bias Current: 10pA Max

• High Impedance Differential CMOS Inputs: 10



• High Open Loop Voltage Gain: 120dB Min.

• Low Input Noise Voltage: 2.0Vp-p

• High Slew Rate: 2.5V/sec.

• Low Power Operation: 20mW

• Output Clamp Speeds Recovery Time

• Compensated Internally for Stable Unity Gain

Operation

• Direct Replacement for ICL7650

• Available in 8-Pin Plastic DIP and 14-Pin Plastic

DIP Packages

Applications

• Instrumentation

• Medical Instrumentation

• Embedded Control

• Temperature Sensor Amplifier

• Strain Gage Amplifier

Device Selection Table

Package Type

Part

Number

Package

Temperature

Range

Max V

TC7650CPA 8-Pin PDIP 0°C to +70°C 5V

TC7650CPD 14-Pin PDIP 0°C to +70°C 5V

8-Pin DIP

INT/EXT

EXT CLK IN

INT CLK OUT

OUTPUT

OUTPUT CLAMP

RETN

TC7650CPD

OUTPUT

TC7650CPA

INPUT

–

OUTPUT CLAMP

INPUT

–

INPUT

14-Pin DIP

NC = NO INTERNAL CONNECTION

TC7650

Chopper Stabilized Operational Amplifier

Summary of content (14 pages)

PAGE 1
TC7650 Chopper Stabilized Operational Amplifier Package Type Features • • • • • • • • • • Low Input Offset Voltage: 0.7µV Typ Low Input Offset Voltage Drift: 0.05V/°C Max Low Input Bias Current: 10pA Max High Impedance Differential CMOS Inputs: 1012 High Open Loop Voltage Gain: 120dB Min. Low Input Noise Voltage: 2.0Vp-p High Slew Rate: 2.5V/sec.
PAGE 2
TC7650 General Description The TC7650 CMOS chopper stabilized operational amplifier practically removes offset voltage error terms from system error calculations. The 5V maximum VOS specification, for example, represents a 15 times improvement over the industry standard OP07E. The 50nV/°C offset drift specification is over 25 times lower than the OP07E. The increased performance eliminates VOS trim procedures, periodic potentiometer adjustment and the reliability problems caused by damaged trimmers.
PAGE 3
TC7650 1.0 ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS* Total Supply Voltage (VDD to VSS) ....................... +18V Input Voltage .................... (VDD +0.3V) to (VSS – 0.3V) Storage Temperature Range.............. -65°C to +150°C Voltage on Oscillator Control Pins...............VDD to VSS Duration of Output Short Circuit .....................Indefinite Current Into Any Pin............................................ 10mA While Operating (Note 3)............................
PAGE 4
TC7650 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1.
PAGE 5
TC7650 tion region, where the main amplifier takes over from the null amplifier. The clock frequency sets the transition region. 3.3 Intermodulation Previous chopper stabilized amplifiers have suffered from intermodulation effects between the chopper frequency and input signals. These arise because the finite AC gain of the amplifier results in a small AC signal at the input.
PAGE 6
TC7650 positive duty cycle is desired for frequencies above 500Hz to ensure transients settle before the internal switches open. The external clock input can also be used as a strobe input. If a strobe signal is connected at the external clock input so that it is LOW during the time an overload signal is applied, neither capacitor will be charged. The leakage currents at the capacitors pins are very low. At 25°C a typical TC7650 will drift less than 10V/sec. 3.
PAGE 7
TC7650 3.9 Pin Compatibility On the 8-pin mini-DIP TC7650, the external null storage capacitors are connected to pins 1 and 8. On most other operational amplifiers these are left open or are used for offset potentiometer or compensation capacitor connections.
PAGE 8
TC7650 TYPICAL CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Positive Clamp Current vs.
PAGE 9
TC7650 5.0 PACKAGING INFORMATION 5.1 Package Marking Information Package marking information not available at this time. 5.2 Package Dimensions Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 8-Pin Plastic DIP PIN 1 .260 (6.60) .240 (6.10) .045 (1.14) .030 (0.76) .070 (1.78) .040 (1.02) .310 (7.87) .290 (7.37) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .040 (1.02) .020 (0.51) .150 (3.81) .115 (2.
PAGE 10
TC7650 6.0 REVISION HISTORY Revision C (December 2012) Added a note to each package outline drawing. DS21463C-page 10  2001-2012 Microchip Technology Inc.
PAGE 11
TC7650 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. Your local Microchip sales office The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
PAGE 12
TC7650 NOTES: DS21463C-page 12  2001-2012 Microchip Technology Inc.
PAGE 13
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 14
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