LTC6800 Rail-to-Rail, Input and Output, Instrumentation Amplifier Features n n n n n n n n Description 116dB CMRR Independent of Gain Maximum Offset Voltage: 100µV Maximum Offset Voltage Drift: 250nV/°C –40°C to 125°C Operation Rail-to-Rail Input Range Rail-to-Rail Output Swing Supply Operation: 2.7V to 5.5V Available in MS8 and 3mm × 3mm × 0.8mm DFN Packages The LTC®6800 is a precision instrumentation amplifier. The CMRR is typically 116dB with a single 5V supply and is independent of gain. The input offset voltage is guaranteed below 100µV with a temperature drift of less than 250nV/°C. The LTC6800 is easy to use; the gain is adjustable with two external resistors, like a traditional op amp. The LTC6800 uses charge balanced sampled data techniques to convert a differential input voltage into a single ended signal that is in turn amplified by a zero-drift operational amplifier. Applications n n n n n The differential inputs operate from rail-to-rail and the single ended output swings from rail-to-rail. The LTC6800 is available in an MS8 surface mount package. For space limited applications, the LTC6800 is available in a 3mm × 3mm × 0.8mm dual fine pitch leadless package (DFN). Thermocouple Amplifiers Electronic Scales Medical Instrumentation Strain Gauge Amplifiers High Resolution Data Acquisition L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application Typical Input Referred Offset vs Input Common Mode Voltage (VS = 3V) High Side Power Supply Current Sense 15 1.5mΩ VS = 3V VREF = 0V TA = 25°C 10 2 3 – 8 7 LTC6800 + 4 5 6 10k 0.1µF 5 OUT 100mV/A OF LOAD CURRENT ILOAD VOS (µV) VREGULATOR LOAD 0 G = 1000 G = 100 –5 G = 10 –10 150Ω G=1 6800 TA01 –15 0 1 1.5 2 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) 3 6800 TA02 6800fb LTC6800 Absolute Maximum Ratings (Note 1) Total Supply Voltage (V+ to V –)................................5.5V Input Current......................................................... ±10mA | V+IN – VREF |.............................................................5.5V | V–IN – VREF |............................................................5.5V Output Short-Circuit Duration........................... Indefinite Operating Temperature Range (Note 7).................................................. –40°C to 125°C Storage Temperature Range DD Package........................................ –65°C to 125°C MS8 Package...................................... –65°C to 150°C Lead Temperature (Soldering, 10 sec)................... 300°C Pin Configuration TOP VIEW NC 1 8 V+ –IN 2 7 OUT +IN 3 V– 4 9 TOP VIEW NC 1 –IN 2 +IN 3 4 V– 6 RG 5 REF 8 7 6 5 V+ OUT RG REF MS8 PACKAGE 8-LEAD PLASTIC MSOP DD PACKAGE 8-LEAD (3mm s 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 200°C/W TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL INTERNALLY CONNECTED TO V– (PCB CONNECTION OPTIONAL) Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6800HDD#PBF LTC6800HDD#TRPBF LAEP 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LTC6800HMS8#PBF LTC6800HMS8#TRPBF LTADE 8-Lead Plastic MSOP –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 6800fb LTC6800 Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, REF = 200mV. Output voltage swing is referenced to V–. All other specifications reference the OUT pin to the REF pin. PARAMETER CONDITIONS Input Offset Voltage (Note 2) VCM = 200mV Average Input Offset Drift (Note 2) TA = –40°C to 85°C TA = 85°C to 125°C l l Common Mode Rejection Ratio (Notes 4, 5) A V = 1, VCM = 0V to 3V l Integrated Input Bias Current (Note 3) VCM = 1.2V 4 10 nA Integrated Input Offset Current (Note 3) VCM = 1.2V 1 3 nA Input Noise Voltage DC to 10Hz 2.5 µVP-P Power Supply Rejection Ratio (Note 6) VS = 2.7V to 5.5V l 110 116 dB Output Voltage Swing High RL = 2k to V – RL = 10k to V – l l 2.85 2.95 2.94 2.98 V V Output Voltage Swing Low MIN TYP –1 85 AV = 1 Gain Nonlinearity AV = 1 Supply Current No Load l UNITS ±100 µV ±250 –2.5 nV/°C µV/°C 113 l Gain Error MAX dB 20 mV 0.1 % 100 ppm 1.2 mA Internal Op Amp Gain Bandwidth 200 kHz Slew Rate 0.2 V/µs 3 kHz Internal Sampling Frequency The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V+ = 5V, V– = 0V, REF = 200mV. Output voltage swing is referenced to V–. All other specifications reference the OUT pin to the REF pin. PARAMETER CONDITIONS Input Offset Voltage (Note 2) VCM = 200mV Average Input Offset Drift (Note 2) TA = –40°C to 85°C TA = 85°C to 125°C l l Common Mode Rejection Ratio (Notes 4, 5) A V = 1, VCM = 0V to 5V l Integrated Input Bias Current (Note 3) VCM = 1.2V Integrated Input Offset Current (Note 3) VCM = 1.2V Power Supply Rejection Ratio (Note 6) VS = 2.7V to 5.5V Output Voltage Swing High = 2k to V – RL RL = 10k to V – Output Voltage Swing Low MIN TYP –1 85 MAX UNITS ±100 µV ±250 –2.5 nV/°C µV/°C 116 dB 4 10 nA 1 3 nA l 110 116 dB l l 4.85 4.95 4.94 4.98 V V 20 l mV Gain Error AV = 1 0.1 % Gain Nonlinearity AV = 1 100 ppm Supply Current No Load 1.3 mA l Internal Op Amp Gain Bandwidth 200 kHz Slew Rate 0.2 V/µs 3 kHz Internal Sampling Frequency Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: These parameters are guaranteed by design. Thermocouple effects preclude measurement of these voltage levels in high speed automatic test systems. VOS is measured to a limit determined by test equipment capability. 6800fb LTC6800 Electrical Characteristics Note 3: If the total source resistance is less than 10k, no DC errors result from the input bias currents or the mismatch of the input bias currents or the mismatch of the resistances connected to –IN and +IN. Note 4: The CMRR with a voltage gain, A V, larger than 10 is 120dB (typ). Note 5: At temperatures above 70°C, the common mode rejection ratio lowers when the common mode input voltage is within 100mV of the supply rails. Note 6: The power supply rejection ratio (PSRR) measurement accuracy depends on the proximity of the power supply bypass capacitor to the device under test. Because of this, the PSRR is 100% tested to relaxed limits at final test. However, their values are guaranteed by design to meet the data sheet limits. Note 7: The LTC6800H is guaranteed functional over the operating temperature range of –40°C to 125°C. Specifications over the –40°C to 125°C range (denoted by l) are assured by design and characterization but are not tested or QA sampled at these temperatures. Typical Performance Characteristics Input Offset Voltage vs Input Common Mode Voltage 5 0 G = 1000 G = 100 –5 G = 10 –10 0 G=1 G = 10 –10 0 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) –15 3.0 60 INPUT OFFSET VOLTAGE (µV) 10 5 0 TA = 70°C –5 TA = 25°C –10 –15 TA = –55°C 0 2 3 4 1 INPUT COMMON MODE VOLTAGE (V) 0 6800 G01 VS = 5V 15 VREF = 0V G = 10 5 6800 G04 2 3 4 1 INPUT COMMON MODE VOLTAGE (V) 10 5 0 TA = 70°C –5 TA = 25°C –10 –20 5 TA = –55°C 60 VS = 3V VREF = 0V G = 10 20 0 TA = 85°C –20 –40 TA = 125°C 0 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) 0 2053 G02 Input Offset Voltage vs Input Common Mode Voltage, 85°C ≤ TA ≤ 125°C 40 –60 VS = 3V 15 VREF = 0V G = 10 –15 G=1 20 INPUT OFFSET VOLTAGE (µV) G = 100 –5 Input Offset Voltage vs Input Common Mode Voltage –20 G = 1000 5 INPUT OFFSET VOLTAGE (µV) –15 20 VS = 5V VREF = 0V 10 TA = 25°C INPUT OFFSET VOLTAGE (µV) 10 Input Offset Voltage vs Input Common Mode Voltage 15 VS = 3V VREF = 0V TA = 25°C INPUT OFFSET VOLTAGE (µV) INPUT OFFSET VOLTAGE (µV) 15 Input Offset Voltage vs Input Common Mode Voltage 3.0 6800 G05 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) 3.0 6800 G03 Input Offset Voltage vs Input Common Mode Voltage, 85°C ≤ TA ≤ 125°C VS = 5V VREF = 0V G = 10 40 20 0 TA = 85°C –20 –40 –60 TA = 125°C 0 2 3 4 1 INPUT COMMON MODE VOLTAGE (V) 5 6800 G06 6800fb LTC6800 Typical Performance Characteristics RS = 10k –20 RS = 15k RS + SMALL CIN –40 – RS = 20k RS 0 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) 3.0 ADDITIONAL OFFSET ERROR (µV) 0 –10 100 50 R+ –100 R+ = 500Ω, R– = 0Ω + BIG CIN –150 –200 R+ = 0Ω, R– = 500Ω R+ = 100Ω, R– = 0Ω –50 R– 0 R+ = 1k, R– = 0Ω – 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) 2 3 4 1 INPUT COMMON MODE VOLTAGE (V) 5 3.0 6800 G13 –20 –30 RS = 10k RS = 5k + – 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) VS = 5V VREF = 0V TA = 25°C G = 10 100 + R+ = 1k, R– = 0Ω RS = 10k RS = 5k 30 RS = 1k 10 RS = 500Ω –10 RS –30 + BIG CIN –50 VS = 5V VREF = 0V R+ = R– = RS CIN > 1µF G = 10 TA = 25°C – RS 0 2 3 4 1 INPUT COMMON MODE VOLTAGE (V) 5 6800 G12 40 20 0 VS = 3V –20 VS = 5V –40 –60 – 1 6800 G09 60 R+ = 500Ω, R– = 0Ω BIG CIN 0 3.0 Offset Voltage vs Temperature R+ = 0Ω, R– = 500Ω R+ = 0Ω, R– = 100Ω –50 R– R+ = 15k, R– = 0k 1.0 1.5 2.0 2.5 0.5 INPUT COMMON MODE VOLTAGE (V) 80 R+ = 100Ω, R– = 0Ω –150 0 6800 G11 0 R+ – R– 50 –70 3.0 R+ = 0Ω, R– = 1k 50 –100 + SMALL CIN Additional Input Offset Due to Input RS vs Input Common Mode (CIN > 1µF) RS 0 R+ = 5k, R– = 0k R+ = 10k, R– = 0k + R –10 6800 G08 RS = 15k BIG CIN 150 –200 0 70 RS –30 R+ = 0k, R– = 15k R+ = 0k, R– = 10k R+ = 0k, R– = 5k 10 –50 Additional Input Offset Due to Input RS Mismatch vs Input Common Mode (CIN > 1µF) R+ = 0Ω, R– = 1k 20 –40 –10 –20 VS = 3V VREF = 0V CIN < 100pF G = 10 TA = 25°C 30 Additional Input Offset Due to Input RS vs Input Common Mode (CIN > 1µF) 6800 G10 R+ = 0Ω, R– = 100Ω 0 0 200 VS = 3V VREF = 0V TA = 25°C G = 10 – RS 0 –40 5 + VS = 3V V = 0V 30 REF R+ = R– = RS C > 1µF 20 GIN= 10 TA = 25°C 10 Additional Input Offset Due to Input RS Mismatch vs Input Common Mode (CIN > 1µF) 150 RS –20 SMALL CIN 40 VS = 5V RIN+ = 0k, RIN– = 20k 30 VREF = 0V CIN < 100pF RIN+ = 0k, RIN– = 15k 20 G = 10 RIN+ = 0k, RIN– = 10k TA = 25°C RIN+ = 10k, RIN– = 0k 10 200 RS = 5k 6800 G07 Additional Input Offset Due to Input RS Mismatch vs Input Common Mode (CIN < 100pF) RIN+ = 15k, RIN– = 0k RIN+ = 20k, RIN– = 0k R+ –20 + SMALL CIN –30 – R– –40 0 2 3 4 1 INPUT COMMON MODE VOLTAGE (V) RS = 10k –10 Additional Input Offset Due to Input RS Mismatch vs Input Common Mode (CIN < 100pF) 40 RS = 15k 0 –30 50 RS = 20k ADDITIONAL OFFSET ERROR (µV) RS = 0k 0 40 ADDITIONAL OFFSET ERROR (µV) RS = 5k VS = 5V VREF = 0V + – 20 RIN = RIN = RS CIN < 100pF G = 10 10 TA = 25°C INPUT OFFSET VOLTAGE (µV) 20 30 ADDITIONAL OFFSET ERROR (µV) 40 –60 ADDITIONAL OFFSET ERROR (µV) VS = 3V VREF = 0V R+ = R– = RS CIN < 100pF G = 10 TA = 25°C ADDITIONAL OFFSET ERROR (µV) ADDITIONAL OFFSET ERROR (µV) 60 Additional Input Offset Due to Input RS vs Input Common Mode (CIN < 100pF) ADDITIONAL OFFSET ERROR (µV) Additional Input Offset Due to Input RS vs Input Common Mode (CIN < 100pF) 2 4 3 INPUT COMMON MODE VOLTAGE (V) 5 6800 G14 –80 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 125 6800 G15 6800fb LTC6800 Typical Performance Characteristics VOS vs VREF VIN+ = VIN– = REF G = 10 TA = 25°C 6 0 VS = 5V VS = 3V –10 2 0 –2 –4 2 VREF (V) 3 –10 –2.4 –1.9 –1.4 –0.9 –0.4 0.1 0.6 OUTPUT VOLTAGE (V) 4 6800 G16 INPUT REFERRED NOISE DENSITY (nV/Hz) 130 R+ = R– = 1k CMRR (db) 110 R+ = R– = 10k 100 R+ = 10k, R– = 0Ω R+ = 0Ω, R– = 10k 90 R+ 80 70 R– + – 1 10 100 FREQUENCY (Hz) 1000 300 250 VS = 3V 100 50 0 1 10 4.5 0 –1 –2 TA = 25°C –1 1 TIME (s) 2 3.5 3.0 3 5 0 –1 –2 6800 G22 –3 –1 1 TIME (s) 3 5 6800 G21 Supply Current vs Supply Voltage VS = 5V, SOURCING 0.95 VS = 3V, SOURCING 1.5 VS = 3V, SINKING VS = 5V, SINKING 1 0.1 OUTPUT CURRENT (mA) –5 1.00 2.0 0 0.01 2.6 6800 G18 VS = 3V TA = 25°C 6800 G20 2.5 1.0 0.6 –0.4 1.6 OUTPUT VOLTAGE (V) 1 –3 10000 4.0 0.5 –3 100 1000 FREQUENCY (Hz) –1.4 Input Referred Noise in 10Hz Bandwidth VS = 5V 150 5.0 VS = 5V TA = 25°C –5 1.6 6800 G17 Output Voltage Swing vs Output Current 1 –3 –4 3 6800 G19 OUTPUT VOLTAGE SWING (V) INPUT REFFERED NOISE VOLTAGE (µV) 2 1.1 G = 10 TA = 25°C 200 Input Referred Noise in 10Hz Bandwidth 3 –2 Input Voltage Noise Density vs Frequency CMRR vs Frequency VS = 3V, 5V VIN = 1VP-P 120 TA = 25°C 0 –10 –2.4 INPUT REFFERED NOISE VOLTAGE (µV) 1 2 –8 –8 0 VS = ±2.5V 8 VREF = 0V G = 10 6 RL = 10k 4 TA = 25°C –6 –6 –20 –30 4 SUPPLY CURRENT (mA) VOS (µV) 10 10 VS = ±2.5V VREF = 0V G=1 RL = 10k TA = 25°C 8 NONLINEARITY (ppm) 20 Gain Nonlinearity, G = 10 Gain Nonlinearity, G = 1 10 NONLINEARITY (ppm) 30 0.90 0.85 TA = 85°C TA = 125°C 0.80 0.75 0.70 TA = –55°C TA = 0°C 0.65 10 6800 G23 0.60 2.5 3.5 4.5 SUPPLY VOLTAGE (V) 5.5 6 6800 G24 6800fb LTC6800 Typical Performance Characteristics Low Gain Settling Time vs Settling Accuracy 6 SETTLING TIME (ms) SETTLING TIME (ms) 7 5 4 3 2 3.40 VS = 5V dVOUT = 1V 30 0.1% ACCURACY TA = 25°C 25 3.35 20 15 10 0.01 0.001 SETTLING ACCURACY (%) 0.1 0 3.30 1 10 6800 G25 100 GAIN (V/V) 1000 10000 TA = 125°C 3.25 TA = 85°C 3.20 3.15 5 1 0 0.0001 35 VS = 5V dVOUT = 1V G < 100 TA = 25°C CLOCK FREQUENCY (kHz) 8 Internal Clock Frequency vs Supply Voltage Settling Time vs Gain TA = 25°C 3.10 2.5 6800 G26 TA = –55°C 3.5 4.5 SUPPLY VOLTAGE (V) 5.5 6 6800 G27 Pin Functions NC (Pin 1): Not Connected. –IN (Pin 2): Inverting Input. +IN (Pin 3): Noninverting Input. V– (Pin 4): Negative Supply. RG (Pin 6): Inverting Input of Internal Op Amp. See Figure 1. OUT (Pin 7): Amplifier Output. See Figure 1. V+ (Pin 8): Positive Supply. REF (Pin 5): Voltage Reference (VREF) for Amplifier Output. 6800fb LTC6800 Block Diagram 8 +IN + 3 –IN V+ CS OUT CH 7 – 2 REF 5 V– RG 6 4 6800 BD Applications Information Theory of Operation The LTC6800 uses an internal capacitor (CS) to sample a differential input signal riding on a DC common mode voltage (see the Block Diagram). This capacitor’s charge is transferred to a second internal hold capacitor (CH) translating the common mode of the input differential signal to that of the REF pin. The resulting signal is amplified by a zero-drift op amp in the noninverting configuration. The RG pin is the negative input of this op amp and allows external programmability of the DC gain. Simple filtering can be realized by using an external capacitor across the feedback resistor. Input Voltage Range The input common mode voltage range of the LTC6800 is rail-to-rail. However, the following equation limits the size of the differential input voltage: V– ≤ (V+IN – V–IN) + VREF ≤ V+ – 1.3 Where V+IN and V–IN are the voltages of the +IN and –IN pins, respectively, VREF is the voltage at the REF pin and V+ is the positive supply voltage. For example, with a 3V single supply and a 0V to 100mV differential input voltage, VREF must be between 0V and 1.6V. Settling Time The sampling rate is 3kHz and the input sampling period during which CS is charged to the input differential voltage VIN is approximately 150µs. First assume that on each input sampling period, CS is charged fully to VIN. Since CS = CH (= 1000pF), a change in the input will settle to N bits of accuracy at the op amp noninverting input after N clock cycles or 333µs(N). The settling time at the OUT pin is also affected by the settling of the internal op amp. Since the gain bandwidth of the internal op amp is typically 200kHz, the settling time is dominated by the switched capacitor front end for gains below 100 (see the Typical Performance Characteristics section). 6800fb LTC6800 Applications Information UNITY GAIN UNITY GAIN 5V V+IN + VIN V–IN – 3 2 5V 8 + 7 – NONUNITY GAIN 5 6 V+IN VOUT + VIN V–IN – 3 2 5V 8 + 7 – 4 5 6 V+IN VOUT + VIN V–IN – 3 2 5V 8 + 7 – 4 5 6 R2 4 VREF 0V < V+IN < 5V 0V < V–IN < 5V 0V < VIN < 3.7V VOUT = VIN NONUNITY GAIN V+IN VOUT + VIN V–IN – 3 2 8 + – VOUT = VIN + VREF VOUT = 1 + R2 R1 VIN + VREF VOUT R1 VREF VREF 0V < V–IN < 5V AND |V–IN – VREF| < 5.5V 0V < V+IN < 5V AND |V+IN – VREF| < 5.5V 0V < VIN + VREF < 3.7V 5 4 R1 0V < V–IN < 5V AND |V–IN – VREF| < 5.5V 0V < V+IN < 5V AND |V+IN – VREF| < 5.5V 0V < VIN + VREF < 3.7V 7 6 R2 0V < V–IN < 5V AND |V–IN – VREF| < 5.5V 0V < V+IN < 5V AND |V+IN – VREF| < 5.5V 0V < VIN + VREF < 3.7V VOUT = 1 + R2 R1 (VIN + VREF) 6800 F01 Figure 1 Input Current Whenever the differential input VIN changes, CH must be charged up to the new input voltage via CS. This results in an input charging current during each input sampling period. Eventually, CH and CS will reach VIN and, ideally, the input current would go to zero for DC inputs. In reality, there are additional parasitic capacitors which disturb the charge on CS every cycle even if VIN is a DC voltage. For example, the parasitic bottom plate capacitor on CS must be charged from the voltage on the REF pin to the voltage on the –IN pin every cycle. The resulting input charging current decays exponentially during each input sampling period with a time constant equal to RSCS. If the voltage disturbance due to these currents settles before the end of the sampling period, there will be no errors due to source resistance or the source resistance mismatch between –IN and +IN. With RS less than 10k, no DC errors occur due to this input current. In the Typical Performance Characteristics section of this data sheet, there are curves showing the additional error from nonzero source resistance in the inputs. If there are no large capacitors across the inputs, the amplifier is less sensitive to source resistance and source resistance mismatch. When large capacitors are placed across the inputs, the input charging currents previously described result in larger DC errors, especially with source resistor mismatches. Power Supply Bypassing The LTC6800 uses a sampled data technique and, therefore, contains some clocked digital circuitry. It is, therefore, sensitive to supply bypassing. A 0.1µF ceramic capacitor must be connected between Pin 8 (V+) and Pin 4 (V–) with leads as short as possible. 6800fb LTC6800 Typical Applications Precision ÷2 5V 0.1µF 3 VIN + 8 7 LTC6800 2 – 5 4 VOUT 6 V VOUT = IN 2 1k 0.1µF 6800 TA03 Precision Doubler (General Purpose) 2.5V 3 VIN + 0.1µF 8 7 LTC6800 2 – 5 4 6 VOUT VOUT = 2VIN 0.1µF 0.1µF –2.5V 6800 TA04 Precision Inversion (General Purpose) 2.5V 3 + 0.1µF 8 7 LTC6800 VIN 2 – 4 5 6 VOUT VOUT = –VIN 0.1µF –2.5V 6800 TA05 6800fb 10 LTC6800 Package Description DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698 Rev C) 0.70 p0.05 3.5 p0.05 1.65 p0.05 2.10 p0.05 (2 SIDES) PACKAGE OUTLINE 0.25 p 0.05 0.50 BSC 2.38 p0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (NOTE 6) 0.200 REF 3.00 p0.10 (4 SIDES) R = 0.125 TYP 5 0.40 p 0.10 8 1.65 p 0.10 (2 SIDES) 0.75 p0.05 4 0.25 p 0.05 1 (DD8) DFN 0509 REV C 0.50 BSC 2.38 p0.10 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE 6800fb 11 LTC6800 Package Description MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 3.00 p 0.102 (.118 p .004) (NOTE 3) 0.889 p 0.127 (.035 p .005) 5.23 (.206) MIN 0.254 (.010) 7 6 5 0.52 (.0205) REF 3.00 p 0.102 (.118 p .004) (NOTE 4) 4.90 p 0.152 (.193 p .006) DETAIL “A” 0o – 6o TYP GAUGE PLANE 3.20 – 3.45 (.126 – .136) 0.53 p 0.152 (.021 p .006) DETAIL “A” 0.42 p 0.038 (.0165 p .0015) TYP 8 0.65 (.0256) BSC 1 1.10 (.043) MAX 2 3 4 0.86 (.034) REF 0.18 (.007) RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.1016 p 0.0508 (.004 p .002) MSOP (MS8) 0307 REV F 6800fb 12 LTC6800 Revision History (Revision history begins at Rev B) REV DATE DESCRIPTION PAGE NUMBER B 7/10 Corrected text in the Absolute Maximum Ratings section 2 Updated Pin 6 and Pin 7 text in the Pin Functions section 7 Replaced Figure 1 9 6800fb Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 13 LTC6800 Typical Application Differential Bridge Amplifier 3V 0.1µF R < 10k 2 3 8 – 7 LTC6800 + 4 5 6 OUT R2 10k 0.1µF R1 10Ω GAIN = 1 + R2 R1 6800 TA06 Related Parts PART NUMBER DESCRIPTION COMMENTS LTC1100 Precision Zero-Drift Instrumentation Amplifier Fixed Gains of 10 or 100, 10µV Offset, 50pA Input Bias Current LT 1101 Precision, Micropower, Single Supply Instrumentation Amplifier Fixed Gains of 10 or 100, IS < 105µA LT1167 Single Resistor, Gain-Programmable, Precision Instrumentation Amplifier Single-Gain Set Resistor: G = 1 to 10,000, Low Noise: 7.5nV√Hz LT1168 Low Power, Single Resistor, Gain-Programmable, Precision Instrumentation Amplifier ISUPPLY = 530µA LTC1043 Dual Precision Instrumentation Switched-Capacitor Building Block Rail-to-Rail Input, 120dB CMRR LT1789-1 Single Supply, Rail-to-Rail Output, Micropower Instrumentation Amplifier ISUPPLY = 80µA Maximum LTC2050 Zero-Drift Operational Amplifier SOT-23 Package, 3µV Max VOS, 30nV/°C Max Drift LTC2051 Dual Zero-Drift Operational Amplifier MS8 Package, 3µV Max VOS, 30nV/°C Max Drift LTC2052 Quad Zero-Drift Operational Amplifier GN-16 Package, 3µV Max VOS, 30nV/°C Max Drift LTC2053 Single Supply, Zero-Drift, Rail-to-Rail Input and Output Instrumentation Amplifier MS8 Package, 10µV Max VOS, 50nV/°C Max Drift ® 6800fb 14 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LT 0710 REV B • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2002