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data sheet ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com comlinear CLC1200 instrumentation amplifer rev 2c comlinear ? CLC1200 instrumentation amplifer features n 2.3v to 18v supply voltage range n gain range of 1 to 10,000 n gain set with one external resistor n 125v maximum input offset voltage n 0.1v/c input offset drift n 700khz bandwidth at g = 1 n 1.2v/s slew rate n 90db minimum cmrr at g = 10 n 2.2ma maximum supply current n 6.6nv/hz input voltage noise n 70nv/hz output voltage noise n 0.2v pp noise (0.1hz to 10hz) n dip-8 or pb-free soic-8 applications n bridge amplifer n scales n thermocouple amplifer n ecg and medical instrumentation n mri (magnetic resonance imaging) n patient monitors n transducer interface n data acquisition systems n strain gauge amplifer n 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 small - er 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 0.2v pp 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. functional block diagram -in r g out +in ref competitive comparison plots (continued on page 9) ordering information part number package pb-free rohs compliant operating temperature range packaging method CLC1200iso8 soic-8 yes yes -40c to +85c rail CLC1200iso8x soic-8 yes yes -40c to +85c reel CLC1200idp8 dip-8 yes yes -40c to +85c rail moisture sensitivity level for all parts is msl-1. - 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
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 2 pin assignments 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 pin confguration 2 3 4 5 6 7 8 +in1 r g out ref 1 -in1 r g -v s +v s
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 3 electrical characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. g = 1 + (49.4k / r g ); total rti error = v osi + (v oso / g) symbol parameter conditions min typ max units gain gain range 1 10,000 gain error 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 % 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 (2) v s = 16.5 -0.03 0.03 % voltage offset v osi input offset voltage v s = 4.5 to 16.5 -125 125 v average temperature coeffcient v s = 4.5 to 16.5 0.1 v/c v oso output offset voltage v s = 4.5 to 16.5, g = 1 -1500 200 1500 v average temperature coeffcient v s = 4.5 to 16.5 2.5 v/c psr offset referred to the input vs. supply g = 1, v s = 2.3 to 18v 80 100 db g = 10, v s = 2.3 to 18v 95 120 db g = 100, v s = 2.3 to 18v 110 140 db g = 1,000, v s = 2.3 to 18v 110 140 db input current i b input bias current v s = 16.5 -2 0.5 2 na average temperature coeffcient v s = 16.5 3 pa/c i os input offset current v s = 16.5 -1 1 na input input impedance differential 10, 2 g, pf common-mode 10, 2 g, pf input voltage range (3) v s = 4.5, g = 1 -v s +1.9 +v s -1.2 v v s = 16.5, 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 = 1,000, 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 = 18, g = 1 -v s +1.4 +v s -1.2 v i sc short circuit current 20 ma dynamic performance bw -3db small signal bandwidth g = 1 700 khz g = 10 400 khz g = 100 100 khz g = 1,000 12 khz sr slew rate g = 10, v s = 15v 0.6 1.2 v/s
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 4 symbol parameter conditions min typ max units t s settling time to 0.01% g = 1 to 100, 5v step 13 s g = 1,000, 5v step 110 s e ni input voltage noise 1khz, g = 1,000, v s = 15v 6.6 13 nv/hz e no output voltage noise 1khz, g = 1, v s = 15v 70 100 nv/hz rti rti, 0.1hz to 10hz g = 1 5 v pp g = 10, v s = 15v 0.8 v pp g = 100, v s = 15v 0.2 0.4 v pp current noise f = 1khz 100 fa/hz 0.1hz to 10hz 10 pa pp reference input r in input impedance 20 k i in input current v s = 16.5v 50 60 a voltage range v s = 15v -v s +1.6 +v s -1.6 v gain to output 1 0.0001 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. 100% tested at 25c 2. nominal reference voltage gain is 1.0 3. input voltage range = cmv + (g v diff )/2
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 5 absolute maximum ratings the safety of the device is not guaranteed when it is operated above the absolute maximum ratings. the device should not be operated at these absolute limits. adhere to the recommended operating conditions for proper device func - tion. the information contained in the electrical characteristics tables and typical performance plots refect the operating conditions noted on the tables and plots. parameter min max unit supply voltage 0 18 v input voltage range -v s +v s v differential input voltage, g = 1 to 10 25 v differential input voltage, g > 10 0.05 (r g + 800) + 1 v load resistance 0.001 k reliability information parameter min typ max unit junction temperature 150 c storage temperature range -65 150 c lead temperature (soldering, 10s) 260 c package thermal resistance 8-lead soic 100 c/w 8-lead dip tbd c/w notes: package thermal resistance ( q ja ), jdec standard, multi-layer test boards, still air. esd protection product soic-8 dip-8 human body model (hbm) 1.5kv tbd charged device model (cdm) 2kv tbd recommended operating conditions parameter min typ max unit operating temperature range -40 +85 c supply voltage range 2.3 18 v
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 6 typical performance characteristics t a = 25c, v s = 15v, r l = 2k to gnd; unless otherwise noted. input offset distribution (typical) input offset distribution (typical) input bias current distribution (typical)
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 7 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 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
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 8 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
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 9 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
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 10 typical competitive comparison plots t a = 25c, v s = 15v, r l = 2k, cadeka evaluation board; unless otherwise noted. large signal settling time (g = 1) large signal settling time (g = 10) frequency response (g = 100) frequency response (g = 1,000) 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
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 11 application information basic operation the CLC1200 is a monolithic instrumentation amplifer based on the classic three op amp solution, refer to the functional block diagram on page 1. the CLC1200 produces a single-ended output reffered to the ref pin potential. the internal resistors are trimmed which allows the gain to be accurately adjusted with one external resistor r g . 49.4k g - 1 r g = 49.4k g = r 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 releated 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 impeadance 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 acheive 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 1: common-mode shield driver CLC1200 + _ + - +v s output -v s ref + input - input 100 + - r g 100 -v s figure 2: differential shield driver
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 12 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 applicaiton 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 CLC1200 g = 7 + _ 8.25k r1 10k g = 143 0.03hz high-pass filter clcxxx + _ 3v output 1v/mv r3 24.9k r2 24.9k c1 r4 1m -3v patient/circuit protection/insulation patient figure 3: pressure monitoring circuits operating on a single 5v supply figure 4: typical circuit for ecg monitor applications
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 13 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-aquisistion 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. c adeka 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 5-7. these evaluation boards are built for dual- supply operation. follow these steps to use the board in a single-supply application: 1. short -vs to ground. 2. use c3 and c4, if the -v s pin of the amplifer is not directly connected to the ground plane. figure 5. ceb00x schematic figure 6. ceb024 top view figure 7. ceb024 bottom view
data sheet comlinear CLC1200 instrumentation amplifer rev 2c ?2008, 2010-2011 cadeka microcircuits llc www.cadeka.com 14
for additional information regarding our products, please visit cadeka at: cadeka.com cadeka, the cadeka logo design, comlinear, and the comlinear logo design are trademarks or registered trademarks of cadeka microcircuits llc. all other brand and product names may be trademarks of their respective companies. cadeka reserves the right to make changes to any products and services herein at any time without notice. cadeka does not assume any responsibility or liability arising out of the application or use of any product or service described herein, except as expressly agreed to in writing by cadeka; nor does the purchase, lease, or use of a product or service from cadeka convey a license under any patent rights, copyrights, trademark rights, or any other of the intellectual property rights of cadeka or of third parties. copyright ?2008, 2010-2011 by cadeka microcircuits llc. all rights reserved. cadeka headquarters loveland, colorado t: 970.663.5452 t: 877.663.5452 (toll free) data sheet comlinear CLC1200 instrumentation amplifer rev 2c mechanical dimensions soic-8 package

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