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? 2008-2014 exar corporation 1 / 15 exar.com/clc1200 rev 2e features 2.3v to 18v supply voltage range gain range of 1 to 10,000 gain set with one external resistor 125v maximum input offset voltage 0.1v/c input offset drift 700khz bandwidth at g = 1 1.2v/s slew rate 90db minimum cmrr at g = 10 2.2ma maximum supply current 6.6nv/hz input voltage noise 70nv/hz output voltage noise 0.2v pp input noise (0.1hz to 10hz) dip-8 or pb-free soic-8 applications bridge amplifer weigh scales thermocouple amplifer ecg and medical instrumentation mri (magnetic resonance imaging) patient monitors transducer interface data acquisition systems strain gauge amplifer industrial process controls general description the clc1200 is a low power, general purpose instrumentation amplifer with a gain range of 1 to 10,000. the clc1200 is offered in 8-lead soic or dip packages and requires only one external gain setting resistor making it smaller and easier to implement than discrete, 3-amp designs. while consuming only 2.2ma of supply current, the clc1200 offers a low 6.6nv/hz input voltage noise and 0.2vpp noise from 0.1hz to 10hz. the clc1200 offers a low input offset voltage of 125v that only varies 0.1v/c over its operating temperature range of -40c to +85c. the clc1200 also features 50ppm maximum nonlinearity. these features make it well suited for use in data acquisition systems. typical application 2 1 8 3 4 7 6 5 v out clc1200 ?input to power supply ground reference +input +v s r g ? v s load thermocouple amplifer competitive plot -7 -6 -5 -4 -3 -2 -1 0 1 2 3 0.0001 0.001 0.01 0.1 1 10 normalized gain (db) frequency (mhz) clc1200 competitor a v out = 0.2v pp r l = 2k ? g = 1 v s = 15v ordering information - back page clc1200 instrumentation amplifier
? 2008-2014 exar corporation 2 / 15 exar.com/clc1200 rev 2e absolute maximum ratings stresses beyond the limits listed below may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. supply voltage ........................................................................ 18v input voltage range ............................................................. v s v differential input voltage (g = 1 to 10) ..................................... 25v differential input voltage (g > 10) .............. 0.05 (r g + 800) +1 v load resistance (min) ................................................................ 1 operating conditions supply voltage range ....................... 2.3v to 18v (4.6v to 36v) gain range .................................................................. 1 to 10,000 operating temperature range ................................. -40c to 85c junction temperature ........................................................... 150c storage temperature range ................................... -65c to 150c lead temperature (soldering, 10s) ...................................... 260c package thermal resistance ja (dip-8) ........................................................................ 100c/w ja (soic-8) ..................................................................... 150c/w package thermal resistance ( ja ), jedec standard, multi-layer test boards, still air. esd protection soic-8 (hbm) ....................................................................... 1.5kv esd rating for hbm (human body model). clc1200
? 2008-2014 exar corporation 3 / 15 exar.com/clc1200 rev 2e electrical characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. gain = 1 + (49.4k/r g ); total rti error = v osi + (v oso /g) symbol parameter conditions min ty p max units gain gain range 1 10,000 gain error (1) g = 1, v out = 10v -0.1 0.1 % g = 10, v out = 10v -0.375 0.375 % g = 100, v out = 10v -0.375 0.375 % g = 1,000, v out = 10v -0.8 0.8 % gain nonlinearity g = 1 - 100, v out = -10v to 10v, r l = 10k 10 50 ppm g = 1 - 100, v out = -10v to 10v, r l = 2k 10 95 ppm gain vs. temperature g = 1 <10 ppm/c g > 1 <-50 ppm/c reference gain error (1) v s = 16.5v -0.03 0.03 % voltage offset v osi input offset voltage v s = 4.5v to 16.5v -125 125 v average temperature coefficient v s = 4.5v to 16.5v 0.1 v/c v oso output offset voltage v s = 4.5v to 16.5v, g = 1 -1500 200 1500 v average temperature coefficient v s = 4.5v to 16.5v 2.5 v/c psr offset referred to the input vs. supply g = 1, v s = 2.3v to 18v 80 100 db g = 10, v s = 2.3v to 18v 95 120 db g = 100, v s = 2.3v to 18v 110 140 db g = 1000, v s = 2.3v to 18v 110 140 db input current i b input bias current v s = 16.5v -2 0.5 2 na average temperature coefficient v s = 16.5v 3 pa/c i os input offset current v s = 16.5v -1 1 na input input impedance differential 10, 2 g, pf common-mode 10, 2 g, pf ivr input voltage range (2) v s = 4.5v, g = 1 -v s + 1.9 +v s - 1.2 v v s = 16.5v, g = 1 -v s + 1.9 +v s - 1.4 v cmrr common-mode rejection ratio g = 1, v s = 16.5v 70 90 db g = 10, v s = 16.5v 90 110 db g = 100, v s = 16.5v 108 130 db g = 1000, v s = 16.5v 108 130 db output v out output swing v s = 2.3v to 4.5v -v s + 1.1 +v s - 1.2 v v s = 18v, g = 1 -v s + 1.4 +v s - 1.2 v i sc short circuit current 20 ma dynamic performance bw -3db small signal -3db bandwidth g = 1 700 khz g = 10 400 khz g = 100 100 khz g = 1000 12 khz sr slew rate g = 10, v s = 15v 0.6 1. 2 v/s t s settling time to 0.01% 5v step, g = 1 to 100 13 s 5v step, g = 1000 110 s clc1200
? 2008-2014 exar corporation 4 / 15 exar.com/clc1200 rev 2e electrical characteristics continued t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. gain = 1 + (49.4k/r g ); total rti error = v osi + (v oso /g) symbol parameter conditions min ty p max units noise e ni input voltage noise 1khz, g = 1000, v s = 15v 6.6 13 nv/hz e no output voltage noise 1khz, g = 1, v s = 15v 70 100 nv/hz e npp peak-to-peak noise (rti) g = 1, 0.1hz to 10hz 5 v pp g = 10, 0.1hz to 10hz, v s = 15v 0.8 v pp g = 100, 0.1hz to 10hz, v s = 15v 0.2 0.4 v pp i n current noise f = 1khz 100 fa/hz i npp peak-to-peak current noise 0.1hz to 10hz 10 pa pp reference input r in input resistance 20 k i in input current v s = 16.5v 50 60 a voltage range -v s + 1.6 +v s - 1.6 v gain to output 10.0001 power supply v s operating range 2.3 18 v i s supply current v s = 16.5v 1. 3 2.2 ma notes: 1. nominal reference voltage gain is 1.0 2. input voltage range = cmv + (g v diff )/2 clc1200
? 2008-2014 exar corporation 5 / 15 exar.com/clc1200 rev 2e clc1200 pin assignments soic-8, dip-8 pin no. pin name description 1, 8 r g r g sets gain 2 -in negative input 3 +in positive input 4 -v s negative supply 5 ref output is referred to the ref pin potential 6 out output 7 +v s positive supply clc1200 pin confgurations soic-8, dip-8 - + 1 2 3 4 r g -in1 +in1 -v s r g +v s out ref 8 7 6 5 clc1200
? 2008-2014 exar corporation 6 / 15 exar.com/clc1200 rev 2e typical performance characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. input offset current distribution (typical) input offset distribution (typical) input bias current distribution (typical) clc1200
? 2008-2014 exar corporation 7 / 15 exar.com/clc1200 rev 2e typical performance characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. large signal pulse response (g = 1) large signal settling time (g = 1) input voltage range vs. v s output voltage swing vs. r l gain vs. frequency output voltage swing vs. v s -20 -10 0 10 20 30 40 50 60 70 0.0001 0.001 0.01 0.1 1 10 gain (db) frequency (mhz) g = 1000 g = 100 g = 10 g = 1 -1.5 -1 -0.5 0 0.5 1 1.5 0 5 10 15 20 output voltage swing (v) supply voltage (+/ - v) g = 10 r l =2k ? r l =2k ? r l =10k ? r l =10k ? +v s - - v s + referred to supply voltages -2 -1 0 1 2 0 5 10 15 20 input voltage swing (v) supply voltage (+/ - v) g = 10 +v s - - v s + referred to supply voltages g = 10 +v s - - v s + 0 10 20 30 0.01 0.1 1 10 output voltage swing (v pp ) load resistance (k ? ) -7.5 -5 -2.5 0 2.5 5 7.5 0 20 40 60 80 100 output voltage (v) time (us) g = 1, r l =2k -0.01 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0 5 10 15 20 25 30 35 40 45 output settling (%) time (us) g = 1, 5v step clc1200
? 2008-2014 exar corporation 8 / 15 exar.com/clc1200 rev 2e typical performance characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. large signal pulse response (g = 1000) large signal settling time (g = 1000) large signal pulse response (g = 100) large signal settling time (g = 100) large signal pulse response (g = 10) large signal settling time (g = 10) -7.5 -5 -2.5 0 2.5 5 7.5 0 20 40 60 80 100 output voltage (v) time (us) g = 10, r l =2k -0.01 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0 5 10 15 20 25 30 35 40 45 output settling (%) time (us) g = 10, 5v step -7.5 -5 -2.5 0 2.5 5 7.5 0 20 40 60 80 100 output voltage (v) time (us) g = 100, r l =2k -0.01 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0 5 10 15 20 25 30 35 40 45 output settling (%) time (us) g = 100, 5v step -7.5 -5 -2.5 0 2.5 5 7.5 0 200 400 600 800 1000 output voltage (v) time (us) g = 1000, r l =2k -0.01 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0 50 100 150 200 250 300 350 400 450 output settling (%) time (us) g = 1000, 5v step clc1200
? 2008-2014 exar corporation 9 / 15 exar.com/clc1200 rev 2e typical performance characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. small signal pulse response (g = 100) small signal pulse response (g = 1000) small signal pulse response (g = 1) small signal pulse response (g = 10) -0.1 -0.05 0 0.05 0.1 0 20 40 60 80 100 output voltage (v) time (us) g = 1, r l =2k, c l =100pf -0.1 -0.05 0 0.05 0.1 0 20 40 60 80 100 output voltage (v) time (us) g = 10, r l =2k, c l =100pf -0.1 -0.05 0 0.05 0.1 0 20 40 60 80 100 output voltage (v) time (us) g = 100, r l =2k, c l =100pf -0.1 -0.05 0 0.05 0.1 0 100 200 300 400 500 output voltage (v) time (us) g = 1000, r l =2k, c l =100pf clc1200
? 2008-2014 exar corporation 10 / 15 exar.com/clc1200 rev 2e typical competitive comparison plots t a = 25c, v s = 15v, r l = 2k, exar evaluation board; unless otherwise noted. small signal pulse response (g = 1) small signal pulse response (g = 10) frequency response (g = 100) frequency response (g = 1000) frequency response (g = 1) frequency response (g = 10) -7 -6 -5 -4 -3 -2 -1 0 1 2 3 0.0001 0.001 0.01 0.1 1 10 normalized gain (db) frequency (mhz) clc1200 competitor a v out = 0.2v pp r l = 2k ? g = 1 v s = 15v -7 -6 -5 -4 -3 -2 -1 0 1 0.0001 0.001 0.01 0.1 1 10 normalized gain (db) frequency (mhz) competitor a clc1200 v out = 0.2v pp r l = 2k ? g = 10 v s = 15v -7 -6 -5 -4 -3 -2 -1 0 1 0.0001 0.001 0.01 0.1 1 10 normalized gain (db) frequency (mhz) competitor a clc1200 v out = 0.2v pp r l = 2k ? g = 100 v s = 15v -7 -6 -5 -4 -3 -2 -1 0 1 0.0001 0.001 0.01 0.1 1 10 normalized gain (db) frequency (mhz) competitor a clc1200 v out = 0.2v pp r l = 2k ? g = 1,000 v s = 15v -0.050 -0.025 0.000 0.025 0.050 0.075 0.100 0.125 0.150 25 35 45 55 65 75 output amplitude (v) time (us) competitor a clc1200 v out = 0.1v pp c l = 100pf -0.025 0.000 0.025 0.050 0.075 0.100 0.125 25 35 45 55 65 75 output amplitude (v) time (us) competitor a clc1200 v out = 0.1v pp c l = 100pf clc1200
? 2008-2014 exar corporation 11 / 15 exar.com/clc1200 rev 2e application information basic information the clc1200 is a monolithic instrumentation amplifer based on the classic three op amp solution, refer to the functional block diagram shown in figure 1. the clc1200 produces a single-ended output referred to the ref pin potential. -in +in ref out ? + ? + + ? r g figure 1: functional block diagram the internal resistors are trimmed which allows the gain to be accurately adjusted with one external resistor r g . g = + 1; r g = 49.4k r g 49.4k g - 1 r g also determines the transconductance of the preamp stage. as r g is reduced for larger gains, the transconductance increases to that of the input transistors. producing the following advantages: open-loop gain increases as the gain is increased, reducing gain related errors gain-bandwidth increases as the gain is increased, optimizing frequency response reduced input voltage noise which is determined by the collector current and base resistance of the input devices gain selection the impedance between pins 1 and 8, r g , sets the gain of the clc1200. table 1 shows the required standard table values of r g for various calculated gains. for g = 1, r g = . 1% r g () caclulated gain 0.1% r g () calculated gain 49.9k 1.990 49.3k 2.002 12.4k 4.984 12.4k 4.984 5.49k 9.998 5.49k 9.998 2.61k 19.93 2.61k 19.93 1.00k 50.40 1.01k 49.91 499 100.0 499 100.0 249 199.4 249 199.4 100 495.0 98.8 501.0 49.9 991.0 49.3 1,003.0 table 1: recommended r g values follow these guidelines for improved performance: to maintain gain accuracy, use 0.1% to 1% resistors to minimize gain error, avoid high parasitic resistance in series with r g to minimize gain drift, use low tc resistors (<10ppm/c) common mode rejection the clc1200 offers high cmrr. to achieve optimal cmrr performance: connect the reference terminal (pin 5) to a low impedance source minimize capacitive and resistive differences between the inputs in many applications, shielded cables are used to minimize noise. properly drive the shield for best cmrr performance over frequency. figures 1 and 2 show active data guards that are confgured to improve ac common-mode rejections. the capacitances of input cable shields are bootstrapped to minimize the capacitance mismatch between the inputs. clc1200 + _ clcxxx + _ +v s output r g / 2 -v s ref r g / 2 + input - input 100 figure 2: common-mode shield driver clc1200
? 2008-2014 exar corporation 12 / 15 exar.com/clc1200 rev 2e clc1200 + _ + - +v s output -v s ref + input - input 100 + - r g 100 -v s figure 3: differential shield driver pressure measurement applications the clc1200 is especially suitable for higher resistance pressure sensors powered at lower voltages where small size and low power become more signifcant. figure 3 shows a 3k pressure transducer bridge powered from 5v. in such a circuit, the bridge consumes only 1.7ma. adding the clc1200 and a buffered voltage divider allows the signal to be conditioned for only 3.8ma of total supply current. small size and low cost make the clc1200 especially attractive for voltage output pressure transducers. since it delivers low noise and drift, it will also serve applications such as diagnostic noninvasive blood pressure measurement. medical ecg the clc1200 is perfect for ecg monitors because of its low current noise. a typical application is shown in figure 4. the clc1200s low power, low supply voltage requirements, and space-saving 8-lead soic package offerings make it an excellent choice for battery-powered data recorders. furthermore, the low bias currents and low current noise, coupled with the low voltage noise of the clc1200, improve the dynamic range for better performance. the value of capacitor c1 is chosen to maintain stability of the right leg drive loop. proper safeguards, such as isolation, must be added to this circuit to protect the patient from possible harm. clc1200 + _ ref 499 g = 100 3k 5v 3k 3k 3k 1.7ma in agnd digital data output clcxxx + _ 1.3ma 5v 5v 20k 10k 20k 0.1ma ref 5v figure 4: pressure monitoring circuits operating on a single 5v supply g = 7 clc1200 0.03hz high-pass filter output 1v/mv +3v ? 3v r g 8.25k 24.9k 24.9k clc1003 g = 143 c 1 1m r 4 10k r 1 r 3 r 2 output ampli?er patient/circuit protection/isolation 3 7 4 5 6 8 1 2 figure 5: typical circuit for ecg monitor applications clc1200
? 2008-2014 exar corporation 13 / 15 exar.com/clc1200 rev 2e grounding the output voltage of the clc1200 is developed with respect to the potential on the reference terminal (pin 8). simply tie the ref pin to the appropriate local ground to resolve many grounding problems. to isolate low level analog signals from a noisy digital environment, many data acquisition components have separate analog and digital ground pins. use separate ground lines (analog and digital) to minimize current fow from sensitive areas to system ground. these ground returns must be tied together at some point, usually best at the adc. layout considerations general layout and supply bypassing play major roles in high frequency performance. exar has evaluation boards to use as a guide for high frequency layout and as an aid in device testing and characterization. follow the steps below as a basis for high frequency layout: include 6.8f and 0.1f ceramic capacitors for power supply decoupling place the 6.8f capacitor within 0.75 inches of the power pin place the 0.1f capacitor within 0.1 inches of the power pin remove the ground plane under and around the part, especially near the input and output pins to reduce parasitic capacitance minimize all trace lengths to reduce series inductances refer to the evaluation board layouts below for more information. evaluation board information the following evaluation boards are available to aid in the testing and layout of these devices: evaluation board # products ceb024 clc1200 in soic-8 evaluation board schematics evaluation board schematics and layouts are shown in figures 6-8. these evaluation boards are built for dual- supply operation. follow these steps to use the board in a single-supply application: 1. short -v s to ground. 2. use c3 and c4, if the -v s pin of the amplifer is not directly connected to the ground plane. figure 6. ceb024 schematic figure 7. ceb024 top view figure 8. ceb024 bottom view clc1200
? 2008-2014 exar corporation 14 / 15 exar.com/clc1200 rev 2e mechanical dimensions soic-8 package dip-8 package clc1200
for further assistance: email: c ustomersupport@exar.com or hpatechsupport@exar.com exar technical documentation: http://www.exar.com/techdoc/ exar corporation headquarters and sales offices 48760 kato road tel.: +1 (510) 668-7000 fremont, ca 94538 - usa fax: +1 (510) 668-7001 ? 2008-2014 exar corporation 15 / 15 exar.com/clc1200 rev 2e ordering information part number package green operating temperature range packaging clc1200iso8x soic-8 ye s -40c to +85c tape & reel clc1200iso8mtr soic-8 ye s -40c to +85c mini tape & reel clc1200iso8evb evaluation board n/a n/a n/a CLC1200IDP8 dip-8 ye s -40c to +85c rail moisture sensitivity level for all parts is msl-1. mini tape and reel contains 250 pieces. revision history revision date description 2e (ecn 1513-02) march 2015 reformat into exar data sheet template. updated pods and thermal resistance numbers. updated ordering information table to include mtr and evb part numbers. updated evaluation board top and bottom views to rev b. added schematic used for evaluation boards. notice exar corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. exar corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. charts and schedules contained here in are only for illustration purposes and may vary depending upon a users specifc application. while the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. exar corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to signifcantly affect its safety or effectiveness. products are not authorized for use in such applications unless exar corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of exar corporation is adequately protected under the circumstances. reproduction, in part or whole, without the prior written consent of exar corporation is prohibited. clc1200

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