LT1789-1/LT1789-10 Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers FEATURES DESCRIPTION n Micropower: 95A Supply Current Max The LT 1789-1/LT1789-10 are micropower, precision n Low Input Offset Voltage: 100V Max instrumentation amplifiers that are optimized for single n Low Input Offset Voltage Drift: 0.5V/C Max supply operation from 2.2V to 36V. The quiescent current n Single Gain Set Resistor: is 95A max, the inputs common mode to ground and the G = 1 to 1000 (LT1789-1) output swings within 110mV of ground. The gain is set G = 10 to 1000 (LT1789-10) with a single external resistor for a gain range of 1 to 1000 n Inputs Common Mode to V for the LT1789-1 and 10 to 1000 for the LT1789-10. n Wide Supply Range: 2.2V to 36V Total Supply The high accuracy of the LT1789-1 (40ppm maximum non- n CMRR at G = 10: 96dB Min linearity and 0.25% max gain error) is unmatched by other n Gain Error: G = 10, 0.25% Max micropower instrumentation amplifiers. The LT1789-10 n Gain Nonlinearity: G = 10, 40ppm Max maximizes both the input common mode range and dynamic n Input Bias Current: 40nA Max output range when an amplification of 10 or greater is required, n PSRR at G = 10: 100dB Min allowing precise signal processing where other instrumenta- n 1kHz Voltage Noise: 48nV/Hz tion amplifiers fail to operate. The LT1789-1/LT1789-10 are n 0.1Hz to 10Hz Noise: 1.5V P-P laser trimmed for very low input offset voltage, low input offset voltage drift, high CMRR and high PSRR. The output can handle capacitive loads up to 400pF (LT1789-1), 1000pF APPLICATIONS (LT1789-10) in any gain configuration while the inputs are n Portable Instrumentation ESD protected up to 10kV (human body). n Bridge Amplifiers n Strain Gauge Amplifiers The LT1789-1/LT1789-10 are offered in the 8-pin SO n Thermocouple Amplifiers package, requiring significantly less PC board area than n Differential to Single-Ended Converters discrete multi op amp and resistor designs. n Medical Instrumentation 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 0.5A to 4A Voltage Controlled Current Source C1 V S 4700pF C3 V 120 S R1 0.1F 8k 90.9k 2 7 R3 TIP127* V IN 100 6 R2 LT1636 10k 3 + V * ENSURE ADEQUATE POWER 5 S DISSIPATION CAPABILITY AT 4 7 3 HIGHER VOLTAGES, 3 CURRENTS AND DUTY CYCLES R4 8 1 10k 6 R * LT1789-1 SENSE REF 0.1 I LOAD 2 C2 V = 3.3V TO 32V 1 S 3300pF 5 V 4 IN I = LOAD 2 R 10 SENSE 4 R * LOAD = 1A PER VOLT AS SHOWN RISE TIME 250s, 10% TO 90%, 1A TO 2A OUTPUT STEP INTO 0.25 LOAD 1789 TA01 1789fc 1 +LT1789-1/LT1789-10 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) + TOP VIEW Supply Voltage (V to V )..........................................36V R 1 8 R Input Differential Voltage ..........................................36V G G IN 2 7 +V Input Current (Note 3) ......................................... 20mA S +IN OUT 3 6 Output Short-Circuit Duration .......................... Indefinite V 4 5 REF Operating Temperature Range .................40C to 85C S Specified Temperature Range (Note 4) S8 PACKAGE 8-LEAD PLASTIC SO LT1789C-1, LT1789C-10 .......................40C to 85C T = 150C, = 190C/W JMAX JA LT1789I-1, LT1789I-10 ........................40C to 85C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec)...................300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT1789CS8-1 PBF LT1789CS8-1 TRPBF 17891 8-Lead Plastic SO 40C to 85C LT1789IS8-1 PBF LT1789IS8-1 TRPBF 1789I1 8-Lead Plastic SO 40C to 85C LT1789CS8-10 PBF LT1789CS8-10 TRPBF 178910 8-Lead Plastic SO 40C to 85C LT1789IS8-10 PBF LT1789IS8-10 TRPBF 789I10 8-Lead Plastic SO 40C to 85C LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT1789CS8-1 LT1789CS8-1 TR 17891 8-Lead Plastic SO 40C to 85C LT1789IS8-1 LT1789IS8-1 TR 1789I1 8-Lead Plastic SO 40C to 85C LT1789CS8-10 LT1789CS8-10 TR 178910 8-Lead Plastic SO 40C to 85C LT1789IS8-10 LT1789IS8-10 TR 789I10 8-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: