Datasheet TC7652 (Microchip)

TC7652 Low Noise, Chopper Stabilized Operational Amplifier Features General Description
• Low Offset Over Temperature Range: 10V The TC7652 is a lower noise version of the TC7650, • Ultra Low Long Term Drift: 150nV/Month sacrificing some input specifications (bias current and • Low Temperature Drift: 100nV/C bandwidth) to achieve a 10x reduction in noise. All the other benefits of the chopper technique are present, • Low DC Input Bias Current: 15pA (i.e, freedom from offset adjust, drift and reliability prob- • High Gain, CMRR and PSRR: 110dB Min lems from external trim components). Like the TC7650, • Low Input Noise Voltage: 0.2Vp-p (DC to 1Hz) the TC7652 requires only two noncritical external caps • Internally Compensated for Unity Gain Operation for storing the chopped null potentials. There are no • Clamp Circuit for Fast Overload Recovery significant chopping spikes, internal effects or over- range lockup problems.
Applications
• Instrumentation • Medical Instrumentation • Embedded Control • Temperature Sensor Amplifier • Strain Gage Amplifier
Device Selection Table Temperature Part Number Package Range
TC7652CPA 8-Pin Plastic DIP 0°C to +70°C TC7652CPD 14-Pin Plastic DIP 0°C to +70°C
Package Type 8-Pin DIP
CA 1 8 CB -Input 2 7 VDD
TC7652CPA
+Input 3 6 Output V 4 5 Output SS Clamp
14-Pin DIP
CB 1 14 INT/EXT EXT CLK CA 2 13 In INT CLK NC 3 12 Out
TC7652CPD
-Input 4 11 VDD +Input 5 10 Output Output NC 6 9 Clamp V 7 8 C SS RETN NC = No Internal Connection (May Be Used As Input Guard)  2001-2012 Microchip Technology Inc. DS21464C-page 1 Document Outline 1.0 Electrical Characteristics 2.0 pin descriptions TABLE 2-1: pin function table 3.0 detailed description 3.1 Capacitor Connection 3.2 Output Clamp 3.3 Clock Figure 3-1: TEST CIRCUIT 4.0 TYPICAL APPLICATIONS 4.1 Component Selection 4.2 Static Protection 4.3 Output Stage/Load Driving Figure 4-1: CONNECTION OF INPUT GUARDS 4.4 Thermoelectric Effects 4.5 Guarding 4.6 Pin Compatibility 4.7 Some Applications Figure 4-2: Noninverting amplifier with optional clamp Figure 4-3: inverting amplifier with optional clamp Figure 4-4: using 741 to boost output drive capability Figure 4-5: low offset comparator Figure 4-6: 1437 offset nulled by tc7652 Figure 4-7: splitting +15v with the 7660 at >95% efficiency 5.0 typical characteristics 6.0 packaging information 6.1 Package Marking Information 6.2 Package Dimensions 7.0 Revision History Corporate Office Atlanta Boston Chicago Cleveland Fax: 216-447-0643 Dallas Detroit Indianapolis Toronto Fax: 852-2401-3431 Australia - Sydney China - Beijing China - Shanghai India - Bangalore Korea - Daegu Korea - Seoul Singapore Taiwan - Taipei Fax: 43-7242-2244-393 Denmark - Copenhagen France - Paris Germany - Munich Italy - Milan Spain - Madrid UK - Wokingham Worldwide Sales and Service