LTC2053/LTC2053-SYNC Precision, Rail-to-Rail, Zero-Drift, Resistor-Programmable Instrumentation Amplifier. Applications. Typical Application

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1 Features n CMRR Independent of Gain n Maximum Offset Votage: µv n Maximum Offset Votage Drift: nv/ C n Rai-to-Rai Input n Rai-to-Rai Output n -Resistor Programmabe Gain n Suppy Operation:.V to ±.V n Typica Noise:.µV P-P (.Hz to Hz) n Typica Suppy Current: µa n LTC-SYNC Aows Synchronization to Externa Cock n Avaiabe in MS and mm mm.mm DFN Packages Appications n Thermocoupe Ampifiers n Eectronic Scaes n Medica Instrumentation n Strain Gauge Ampifiers n High Resoution Data Acquisition LTC/LTC-SYNC Precision, Rai-to-Rai, Zero-Drift, Resistor-Programmabe Instrumentation Ampifier Description The LTC is a high precision instrumentation ampifier. The CMRR is typicay with a singe or dua V suppy and is independent of gain. The input offset votage is guaranteed beow µv with a temperature drift of ess than nv/ C. The LTC is easy to use; the gain is adjustabe with two externa resistors, ike a traditiona op amp. The LTC uses charge baanced samped data techniques to convert a differentia input votage into a singe ended signa that is in turn ampified by a zero-drift operationa ampifier. The differentia inputs operate from rai-to-rai and the singe-ended output swings from rai-to-rai. The LTC can be used in singe-suppy appications, as ow as.v. It can aso be used with dua ±.V suppies. The LTC requires no externa cock, whie the LTC-SYNC has a CLK pin to synchronize to an externa cock. The LTC is avaiabe in an MS surface mount package. For space imited appications, the LTC is avaiabe in a mm mm.mm dua fine pitch eadess package (DFN). L, LT, LTC, LTM, Linear Technoogy and the Linear ogo are registered trademarks of Linear Technoogy Corporation. A other trademarks are the property of their respective owners. Typica Appication Differentia Bridge Ampifier V R < k LTC,.µF R k.µf R Ω OUT GAIN = R R TA Typica Input Referred Offset vs Input Common Mode Votage (V S = V) V S = V V REF = V G = G = G = G = TAb syncfc

2 LTC/LTC-SYNC Absoute Maximum Ratings (Note ) Tota Suppy Votage (V to V )... V Input Current... ±ma V IN V REF...V VIN V REF...V Output Short-Circuit Duration... Indefinite Operating Temperature Range LTCC, LTCC-SYNC... C to C LTCI, LTCI-SYNC... C to C LTCH... C to C Storage Temperature Range MS Package... C to C DD Package... C to C Lead Temperature (Sodering, sec)... C Pin Configuration TOP VIEW EN IN IN V 9 DD PACKAGE -LEAD (mm mm) PLASTIC DFN V OUT RG REF T JMAX = C, θ JA = C/W, UNDERSIDE METAL INTERNALLY CONNECTED TO V (PCB CONNECTION OPTIONAL) EN/CLK IN IN V TOP VIEW V OUT RG REF MS PACKAGE -LEAD PLASTIC MSOP T JMAX = C, θ JA = C/W PIN IS EN ON LTC, CLK ON LTC-SYNC Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTCCDD#PBF LTCCDD#TRPBF LAEQ -Lead (mm mm) Pastic DFN C to C LTCIDD#PBF LTCIDD#TRPBF LAEQ -Lead (mm mm) Pastic DFN C to C LTCHDD#PBF LTCHDD#TRPBF LAEQ -Lead (mm mm) Pastic DFN C to C LTCCMS#PBF LTCCMS#TRPBF LTVT -Lead Pastic MSOP C to C LTCIMS#PBF LTCIMS#TRPBF LTJY -Lead Pastic MSOP C to C LTCHMS#PBF LTCHMS#TRPBF LTAFB -Lead Pastic MSOP C to C LTCCMS-SYNC#PBF LTCCMS-SYNC#TRPBF LTBNP -Lead Pastic MSOP C to C LTCIMS-SYNC#PBF LTCIMS-SYNC#TRPBF LTBNP -Lead Pastic MSOP C to C Consut LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a abe on the shipping container. Consut LTC Marketing for information on non-standard ead based finish parts. For more information on ead free part marking, go to: For more information on tape and ree specifications, go to: syncfc

3 Eectrica Characteristics LTC/LTC-SYNC The denotes the specifications which appy over the fu operating temperature range, otherwise specifications are at. V = V, V = V, REF = mv. Output votage swing is referenced to V. A other specifications reference the OUT pin to the REF pin. PARAMETER CONDITIONS MIN TYP MAX UNITS Gain Error A V =.. % Gain Noninearity A V =, LTC A V =, LTC-SYNC Input Offset Votage (Note ) V CM = mv ± µv Average Input Offset Drift (Note ) T A = C to C T A = C to C Average Input Bias Current (Note ) V CM =.V na Average Input Offset Current (Note ) V CM =.V na Input Noise Votage DC to Hz. µv P-P Common Mode Rejection Ratio (Notes, ) A V =, V CM = V to V, LTCC, LTCC-SYNC A V =, V CM =.V to.9v, LTCI, LTCI-SYNC A V =, V CM = V to V, LTCI, LTCI-SYNC A V =, V CM =.V to.9v, LTCH A V =, V CM = V to V, LTCH Power Suppy Rejection Ratio (Note ) V S =.V to V Output Votage Swing High R L = k to V R L = k to V Output Votage Swing Low mv Suppy Current No Load. ma Suppy Current, Shutdown V EN.V, LTC Ony µa EN/CLK Pin Input Low Votage, V IL. V EN/CLK Pin Input High Votage, V IH. V EN/CLK Pin Input Current V EN/CLK = V. µa Interna Op Amp Gain Bandwidth khz Sew Rate. V/µs Interna Samping Frequency khz The denotes the specifications which appy over the fu operating temperature range, otherwise specifications are at. V = V, V = V, REF = mv. Output votage swing is referenced to V. A other specifications reference the OUT pin to the REF pin. PARAMETER CONDITIONS MIN TYP MAX UNITS Gain Error A V =.. % Gain Noninearity A V = ppm Input Offset Votage (Note ) V CM = mv ± µv Average Input Offset Drift (Note ) T A = C to C T A = C to C Average Input Bias Current (Note ) V CM =.V na Average Input Offset Current (Note ) V CM =.V na Common Mode Rejection Ratio (Notes, ) A V =, V CM = V to V, LTCC A V =, V CM = V to V, LTCC-SYNC A V =, V CM =.V to.9v, LTCI A V =, V CM =.V to.9v, LTCI-SYNC A V =, V CM = V to V, LTCI, LTCI-SYNC A V =, V CM =.V to.9v, LTCH A V =, V CM = V to V, LTCH Power Suppy Rejection Ratio (Note ) V S =.V to V 9 ±. ±. ppm ppm nv/ C µv/ C V V nv/ C µv/ C syncfc

4 LTC/LTC-SYNC Eectrica Characteristics The denotes the specifications which appy over the fu operating temperature range, otherwise specifications are at. V = V, V = V, REF = mv. Output votage swing is referenced to V. A other specifications reference the OUT pin to the REF pin. PARAMETER CONDITIONS MIN TYP MAX UNITS Output Votage Swing High R L = k to V R L = k to V Output Votage Swing Low mv Suppy Current No Load.. ma Suppy Current, Shutdown V EN.V, LTC Ony µa EN/CLK Pin Input Low Votage, V IL. V EN/CLK Pin Input High Votage, V IH. V EN/CLK Pin Input Current V EN/CLK = V µa Interna Op Amp Gain Bandwidth khz Sew Rate. V/µs Interna Samping Frequency khz The denotes the specifications which appy over the fu operating temperature range, otherwise specifications are at. V = V, V = V, REF = V. PARAMETER CONDITIONS MIN TYP MAX UNITS Gain Error A V =.. % Gain Noninearity A V = ppm Input Offset Votage (Note ) V CM = V ± µv Average Input Offset Drift (Note ) T A = C to C T A = C to C Average Input Bias Current (Note ) V CM = V na Average Input Offset Current (Note ) V CM = V na Common Mode Rejection Ratio (Notes, ) A V =, V CM = V to V, LTCC A V =, V CM = V to V, LTCC-SYNC A V =, V CM =.9V to.9v, LTCI A V =, V CM =.9V to.9v, LTCI-SYNC A V =, V CM = V to V, LTCI, LTCI-SYNC A V =, V CM =.9V to.9v, LTCH A V =, V CM = V to V, LTCH Power Suppy Rejection Ratio (Note ) V S =.V to V Maximum Output Votage Swing R L = k to GND, C- and I-Grades R L = k to GND, A Grades R L = k to GND, LTCH Ony Suppy Current No Load.9. ma Suppy Current, Shutdown V EN.V, LTC Ony µa EN Pin Input Low Votage, V IL. V CLK Pin Input Low Votage, V IL. V EN/CLK Pin Input High Votage, V IH. V EN/CLK Pin Input Current V EN/CLK = V µa Interna Op Amp Gain Bandwidth khz Sew Rate. V/µs Interna Samping Frequency khz 9 9 ±. ±. ±. ±. ±.9 ±. ±. V V nv/ C µv/ C V V V syncfc

5 Eectrica Characteristics Note : Stresses beyond those isted under Absoute Maximum Ratings may cause permanent damage to the device. Exposure to any Absoute Maximum Rating condition for extended periods may affect device reiabiity and ifetime. Note : These parameters are guaranteed by design. Thermocoupe effects precude measurement of these votage eves in high speed automatic test systems. V OS is measured to a imit determined by test equipment capabiity. Note : If the tota source resistance is ess than k, no DC errors resut from the input bias currents or the mismatch of the input bias currents or the mismatch of the resistances connected to IN and IN. LTC/LTC-SYNC Note : The CMRR with a votage gain, A V, arger than is (typ). Note : At temperatures above C, the common mode rejection ratio owers when the common mode input votage is within mv of the suppy rais. Note : The power suppy rejection ratio (PSRR) measurement accuracy depends on the proximity of the power suppy bypass capacitor to the device under test. Because of this, the PSRR is % tested to reaxed imits at fina test. However, their vaues are guaranteed by design to meet the data sheet imits. Typica Performance Characteristics Input Offset Votage vs Input Common Mode Votage V S = V V REF = V G = G = G = G = G Input Offset Votage vs Input Common Mode Votage V S = V V REF = V G = G = G = G = G Input Offset Votage vs Input Common Mode Votage V S = ±V V REF = V G = G = G = G = G Input Offset Votage vs Input Common Mode Votage V S = V V REF = V G = T A = C T A = C T A = C G Input Offset Votage vs Input Common Mode Votage V S = V V REF = V G = T A = C T A = C T A = C G Input Offset Votage vs Input Common Mode Votage V S = ±V V REF = V G = T A = C T A = C T A = C G syncfc

6 LTC/LTC-SYNC Typica Performance Characteristics Input Offset Votage vs Input Common Mode Votage H-GRADE PARTS V S = V V REF = V G = T A = C T A = C G Input Offset Votage vs Input Common Mode Votage H-GRADE PARTS V S = V V REF = V G = T A = C T A = C G Input Offset Votage vs Input Common Mode Votage H-GRADE PARTS V S = ±V V REF = V G = T A = C T A = C G9 Error Due to Input R S vs Input Common Mode (C IN < pf) V S = V V REF = V R = R = R S C IN < pf G = R S SMALL C IN R S R S = k R S = k R S = k R S = k R S = k G Error Due to Input R S vs Input Common Mode (C IN < pf) V S = V V REF = V R = R = R S C IN < pf G = R S = k R S = k R S = k R S = k G Error Due to Input R S vs Input Common Mode (C IN < pf) V S = ±V V REF = V R = R = R S C IN < pf G = R S = k R S = k R S = k G Error Due to Input R S Mismatch vs Input Common Mode (C IN < pf) V S = V V REF = V C IN < pf R = k, R = k G = R = k, R = k R = k, R = k SMALL C IN R = k, R = k R R = k, R = k R R = k, R = k G Error Due to Input R S Mismatch vs Input Common Mode (C IN < pf) V S = V V REF = V C IN < pf G = R IN = k, RIN = k R IN = k, RIN = k R IN = k, RIN = k R IN = k, RIN = k R IN = k, RIN = k R IN = k, RIN = k G Error Due to Input R S Mismatch vs Input Common Mode (C IN < pf) V S = ±V V REF = V C IN < pf G = R = k, R = k R = k, R = k R = k, R = k R = k, R = k G syncfc

7 Typica Performance Characteristics LTC/LTC-SYNC Error Due to Input R S vs Input Common Mode (C IN > µf) V S = V V REF = V R = R = R S C IN > µf G = R S BIG C IN R S R S = k R S = k R S = k G Error Due to Input R S vs Input Common Mode (C IN > µf) V S = V V REF = V R = R = R S C IN > µf G = R S = k R S = k R S = k R S = Ω G Error Due to Input R S vs Input Common Mode (C IN > µf) V S = ±V V REF = V R = R = R S C IN > µf G = R S = k R S = k R S = k R S = Ω G Error Due to Input R S Mismatch vs Input Common Mode (C IN >µf) V S = V V REF = V R = k, R = k R = k, R = Ω R = k, R = Ω R = Ω, R = k R R = Ω, R = k BIG C IN R = k, R = k R G9 Error Due to Input R S Mismatch vs Input Common Mode (C IN >µf) V S = V V REF = V R = k, R = k R = k, R = Ω R = k, R = Ω R = Ω, R = k R = Ω, R = k R = k, R = k G Error Due to Input R S Mismatch vs Input Common Mode (C IN >µf) V S = ±V V REF = V R = k, R = k R = k, R = Ω R = k, R = Ω R = Ω, R = k R = Ω, R = k R = k, R = k G Offset Votage vs Temperature V OS vs REF (Pin ) V OS vs REF (Pin ) V S = V V S = ±V V S = V V OS (µv) V IN = V IN = REF G = V S = V V S = V V OS (µv) V IN = V IN = REF G = V S = V TEMPERATURE ( C) G V REF (V) G 9 V REF (V) G syncfc

8 LTC/LTC-SYNC Typica Performance Characteristics NONLINEARITY (ppm) Gain Noninearity, G = Gain Noninearity, G = CMRR vs Frequency V S = ±.V V REF = V G = R L = k OUTPUT VOLTAGE (V) G NONLINEARITY (ppm). V S = ±.V V REF = V G = R L = k..... OUTPUT VOLTAGE (V) G CMRR (db) 9 V S = V, V, ±V V IN = V P-P R = k, R = k R R R = R = k R = R = k R = k, R = k FREQUENCY (Hz) G INPUT REFERRED NOISE DENSITY (nv/ Hz) Input Votage Noise Density vs Frequency G = V S = ±V V S = V V S = V FREQUENCY (Hz) G INPUT REFERRED NOISE VOLTAGE (µv) Input Referred Noise in Hz Bandwidth V S = V TIME (s) G9 INPUT REFERRED NOISE VOLTAGE (µv) Input Referred Noise in Hz Bandwidth V S = V TIME (s) G OUTPUT VOLTAGE SWING (V) Output Votage Swing vs Output Current. V S = V, SOURCING V S = V, SOURCING V S = V, SINKING V S = V, SINKING. OUTPUT CURRENT (ma) G OUTPUT VOLTAGE SWING (V). Output Votage Swing vs Output Current V S = ±V SOURCING SINKING. OUTPUT CURRENT (ma) G syncfc

9 Typica Performance Characteristics LTC/LTC-SYNC SUPPLY CURRENT Suppy Current vs Suppy Votage T A = C T A = C T A = C T A = C SETTLING TIME (ms) Low Gain Setting Time vs Setting Accuracy V S = V dv OUT = V G < SUPPLY VOLTAGE (V). G.... SETTLING ACCURACY (%) G SETTLING TIME (ms) Setting Time vs Gain V S = V dv OUT = V.% ACCURACY CLOCK FREQUENCY (khz)..... Interna Cock Frequency vs Suppy Votage T A = C T A = C GAIN (V/V) G. T A = C..... SUPPLY VOLTAGE (V). G Pin Functions EN (Pin, LTC Ony): Active Low Enabe Pin. CLK (Pin, LTC-SYNC Ony): Cock input for Synchronizing to Externa System Cock. IN (Pin ): Inverting Input. IN (Pin ): Noninverting Input. V (Pin ): Negative Suppy. REF (Pin ): Votage Reference (V REF ) for Ampifier Output. RG (Pin ): Inverting Input of Interna Op Amp. See Figure. OUT (Pin ): Ampifier Output. See Figure. V (Pin ): Positive Suppy. syncfc

10 LTC/LTC-SYNC Bock Diagram IN IN V ZERO-DRIFT OP AMP OUT C S C H REF RG V EN/CLK* BD *NOTE: PIN IS EN ON THE LTC AND CLK ON THE LTC-SYNC Appications Information Theory of Operation The LTC uses an interna capacitor (C S ) to sampe a differentia input signa riding on a DC common mode votage (see the Bock Diagram). This capacitor s charge is transferred to a second interna hod capacitor (C H ) transating the common mode of the input differentia signa to that of the REF pin. The resuting signa is ampified by a zero-drift op amp in the noninverting configuration. The RG pin is the negative input of this op amp and aows externa programmabiity of the DC gain. Simpe fitering can be reaized by using an externa capacitor across the feedback resistor. Input Votage Range The input common mode votage range of the LTC is rai-to-rai. However, the foowing equation imits the size of the differentia input votage: V (VIN V IN) V REF V. Where VIN and V IN are the votages of the IN and IN pins, respectivey, V REF is the votage at the REF pin and V is the positive suppy votage. For exampe, with a V singe suppy and a V to mv differentia input votage, V REF must be between V and.v. ± Vot Operation When using the LTC with suppies over.v, care must be taken to imit the maximum difference between any of the input pins (IN or IN) and the REF pin to.v; if not, the device wi be damaged. For exampe, if rai-to-rai input operation is desired when the suppies are at ±V, the REF pin shoud be V, ±.V. As a second exampe, if V is V and V and REF are at V, the inputs shoud not exceed.v. Setting Time The samping rate is khz and the input samping period during which C S is charged to the input differentia votage V IN is approximatey µs. First assume that on each input samping period, C S is charged fuy to V IN. Since C S = C H (= pf), a change in the input wi sette to N bits of accuracy at the op amp noninverting input after N cock cyces or µs(n). The setting time at the OUT pin is aso affected by the setting of the interna op amp. Since the gain bandwidth of the interna op amp is typicay khz, the setting time is dominated by the switched capacitor front end for gains beow (see the Typica Performance Characteristics section). syncfc

11 Appications Information LTC/LTC-SYNC SINGLE SUPPLY, UNITY GAIN SINGLE SUPPLY, UNITY GAIN DUAL SUPPLY, NONUNITY GAIN DUAL SUPPLY, NONUNITY GAIN V V V V V IN V IN V IN VOUT V IN V IN V IN V REF VOUT V IN V IN V IN V R R VOUT V IN V IN V IN V V REF R R VOUT V REF V < V IN < V V < V IN < V V < V IN <.V V OUT = V IN V < V IN < V AND V IN V REF <.V V < V IN < V AND V IN V REF <.V V < V IN V REF <.V V OUT = V IN V REF V < V IN < V AND V IN V REF <.V V < V IN < V AND V IN V REF <.V V < V IN V REF <.V R V OUT = R V IN V REF V < V IN < V AND V IN V REF <.V V < V IN < V AND V IN V REF <.V V < V IN V REF <.V R V OUT = (V IN V REF ) R F Figure Input Current Whenever the differentia input V IN changes, C H must be charged up to the new input votage via C S. This resuts in an input charging current during each input samping period. Eventuay, C H and C S wi reach V IN and, ideay, the input current woud go to zero for DC inputs. In reaity, there are additiona parasitic capacitors which disturb the charge on C S every cyce even if V IN is a DC votage. For exampe, the parasitic bottom pate capacitor on C S must be charged from the votage on the REF pin to the votage on the IN pin every cyce. The resuting input charging current decays exponentiay during each input samping period with a time constant equa to R S C S. If the votage disturbance due to these currents settes before the end of the samping period, there wi be no errors due to source resistance or the source resistance mismatch between IN and IN. With R S ess than k, no DC errors occur due to this input current. In the Typica Performance Characteristics section of this data sheet, there are curves showing the additiona error from non-zero source resistance in the inputs. If there are no arge capacitors across the inputs, the ampifier is ess sensitive to source resistance and source resistance mismatch. When arge capacitors are paced across the inputs, the input charging currents previousy described resut in arger DC errors, especiay with source resistor mismatches. Power Suppy Bypassing The LTC uses a samped data technique and, therefore, contains some cocked digita circuitry. It is, therefore, sensitive to suppy bypassing. For singe or dua suppy operation, a.µf ceramic capacitor must be connected between Pin (V ) and Pin (V ) with eads as short as possibe. Synchronizing to an Externa Cock (LTC-SYNC Ony) The LTC has an internay generated sampe cock that is typicay khz. There is no need to provide the LTC with a cock. However, in some appications, it may be desirabe for the user to contro the samping frequency more precisey to avoid undesirabe aiasing. This can be done with the LTC-SYNC. This device uses Pin as a cock input whereas the LTC uses Pin as an enabe pin. If CLK (Pin ) is eft foating on the LTC-SYNC, the device wi run on its interna osciator, simiar to the LTC. However, if not externay synchronizing to a system cock, it is recommended that the LTC be used instead of the LTC-SYNC because the LTC- SYNC is sensitive to parasitic capacitance on the CLK pin when eft foating. Cocking the LTC-SYNC is accompished by driving the CLK pin at times the desired sampe cock frequency. This competey disabes the interna cock. For exampe, to achieve the nomina LTC sampe cock rate of khz, a khz externa cock shoud be appied to the CLK pin of the LTC SYNC. syncfc

12 LTC/LTC-SYNC Appications Information If a square wave is used to drive the CLK pin, a µs RC time constant shoud be paced in front of the CLK pin to maintain ow offset votage performance (see Figure ). This avoids interna and externa couping of the high frequency components of the externa cock at the instant the LTC-SYNC hods the samped input. V IN V IN V D LTC-SYNC V CLK R VOUT EXTERNAL CLOCK F Figure. Centered Justified for a Singe Line of Text R k.nf V V The LTC-SYNC is tested with a sampe cock of khz (f CLK = khz) to the same specifications as the LTC. In addition, the LTC-SYNC is tested at one-haf and x this frequency to verify proper operation. The curves in the Typica Performance Characteristics section of this data sheet appy to the LTC-SYNC when driving it with a khz cock at Pin (f CLK = khz, khz sampe cock rate). Beow are three curves that show the behavior of the LTC-SYNC as the cock frequency is varied. The offset is essentiay unaffected over a : increase or decrease of the typica LTC sampe cock speed. The bias current is directy proportiona to the cock speed. The noise is roughy proportiona to the square root of the cock frequency. For optimum noise and bias current performance, drive the LTC-SYNC with a nomina khz externa cock (khz sampe cock). INPUT OFFSET (µv) V S = ±V V S = V V S = V TYP LTC SAMPLE FREQUENCY SAMPLE FREQUENCY (Hz) (= F CLK /) F INPUT BIAS CURRENT (na) V S = V V REF = V CM = V TYP LTC SAMPLE FREQUENCY SAMPLE FREQUENCY (Hz) (= F CLK /) F INPUT REFERRED NOISE VOLTAGE (µv PP ) V S = V NOISE IN Hz BANDWIDTH TYP LTC SAMPLE FREQUENCY SAMPLE FREQUENCY (F CLK /) F Figure. LTC-SYNC Input Offset vs Sampe Frequency Figure. LTC-SYNC Average Input Bias Current vs Sampe Frequency Figure. LTC-SYNC Input Referred Noise vs Sampe Frequency syncfc

13 Typica Appications Precision Current Source LTC/LTC-SYNC Precision (Low Noise.V Reference) V V.µF R V OUT i LOAD V C LTC RG REF.µF EN k.k V i = C, i ma R < V OUT < (V V C ) LT µf k.µf LTC.V (nv/ Hz) TA.µF TA Precision Douber (Genera Purpose) Precision Inversion (Genera Purpose) V.µF V.µF V IN LTC VOUT V IN LTC V OUT V OUT = V IN. F.µF.µF V OUT = V IN V TA V TA syncfc

14 LTC/LTC-SYNC Typica Appications Differentia Thermocoupe Ampifier M M V.µF C C TYPE K THERMOCOUPLE (.µv/ C) YELLOW ORANGE.µF M M k.µf k LTC REF RG EN.µF 9k % mv/ C THERMAL COUPLING V.µF k % Ω LT V O R k V LTC SCALE FACTOR TRIM TA High Side Power Suppy Current Sense V REG. I LOAD.µF LOAD LTC, k.µf OUT mv/a OF LOAD CURRENT Ω TA syncfc

15 Package Description DD Package -Lead Pastic DFN (mm mm) (Reference LTC DWG # --9 Rev C) LTC/LTC-SYNC ( SIDES) PACKAGE OUTLINE... BSC.. RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R =. TYP.. PIN TOP MARK (NOTE ). REF.. ( SIDES) ( SIDES).... BOTTOM VIEW EXPOSED PAD. BSC (DD) DFN 9 REV C NOTE:. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M-9 VARIATION OF (WEED-). DRAWING NOT TO SCALE. ALL DIMENSIONS ARE IN MILLIMETERS. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED.mm ON ANY SIDE. EXPOSED PAD SHALL BE SOLDER PLATED. SHADED AREA IS ONLY A REFERENCE FOR PIN LOCATION ON TOP AND BOTTOM OF PACKAGE syncfc

16 LTC/LTC-SYNC Package Description MS Package -Lead Pastic MSOP (Reference LTC DWG # -- Rev F).. (..) (NOTE ). (.) REF. (.) MIN.. (..) TYP.9. (..).. (..). (.) BSC RECOMMENDED SOLDER PAD LAYOUT GAUGE PLANE. (.). (.) DETAIL A DETAIL A TYP.. (..) NOTE:. DIMENSIONS IN MILLIMETER/(INCH). DRAWING NOT TO SCALE. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED.mm (.") PER SIDE. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED.mm (.") PER SIDE. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE.mm (.") MAX SEATING PLANE.9. (.9.). (.) MAX.. (.9.) TYP. (.) BSC.. (..) (NOTE ). (.) REF.. (..) MSOP (MS) REV F syncfc

17 LTC/LTC-SYNC Revision History (Revision history begins at Rev C) REV DATE DESCRIPTION PAGE NUMBER C / Corrected text in the Absoute Maximum Ratings section Updated Pin and Pin text in the Pin Functions section 9 Repaced Figure Information furnished by Linear Technoogy Corporation is beieved to be accurate and reiabe. However, no responsibiity is assumed for its use. Linear Technoogy Corporation makes no representation that the interconnection of its circuits as described herein wi not infringe on existing patent rights. syncfc

18 LTC/LTC-SYNC Typica Appication Linearized Patinum RTD Ampifier PT* -WIRE RTD.k i ma V LTC V LTC.µF.µF.k M.µF.k.µF GAIN CW *CONFORMING TO IEC OR DIN R T = R O (.9 T. T ), R O = Ω (e.g., Ω AT C,.9Ω AT C,.Ω AT C) k 9.k k.µf CW.9k k 9k 9.9Ω LINEARITY LT-. ZERO CW V.9k k Ω 9Ω TA mv/ C C C (±. C) Reated Parts PART NUMBER DESCRIPTION COMMENTS LT Singe Resistor Gain-Programmabe, Precision Instrumentation Ampifier LTC/LTC Zero-Drift Singe/Dua Operation Ampifier SOT- and MS Packages Singe-Gain Set Resistor: G = to,, Low Noise:.nV Hz LTC/LTC Zero-Drift µpower Operationa Ampifier SOT- and MS Packages, µa/op Amp LTC Singe-Suppy, Zero-Drift, Rai-to-Rai Input and Output Instrumentation Ampifier MS Package, µv Max V OS, nv/ C Max Drift syncfc LT REV C PRINTED IN USA Linear Technoogy Corporation McCarthy Bvd., Mipitas, CA 9- () -9 FAX: () - LINEAR TECHNOLOGY CORPORATION