LT1168 Linear Technology, LT1168 Datasheet
LT1168
Available stocks
Related parts for LT1168
LT1168 Summary of contents
Page 1
... The low voltage noise of 10nV/ Hz (at 1kHz) is not compromised by low power dissipation (350 A typical for 15V supplies). The wide supply range of 2.3V to 18V allows the LT1168 to fit into a wide variety of industrial as well as battery-powered applications. The high accuracy of the LT1168 is due to a 20ppm maximum nonlinearity and 0 ...
Page 2
... Input Current (Note 2) ....................................... 20mA Output Short-Circuit Duration (Note 3) ............ Indefinite Operating Temperature Range (Note 4) .. – Specified Temperature Range LT1168AC/LT1168C (Note 5) ............. – LT1168AI/LT1168I ............................. – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ELECTRICAL CHARACTERISTICS ...
Page 3
... 0.0001 = 15V 0V 10k unless LT1168C TYP MAX MIN TYP MAX 0.01 0.03 0.012 0.04 0.40 1.5 0.500 1.6 0.45 1.6 0.550 1.7 0.50 1.7 0.600 1 100 200 ...
Page 4
... – 1.5 – 0.48 0.25 0.48 +V – 1.6 – 15V 0V 10k unless LT1168I TYP MAX MIN TYP MAX 0.014 0.04 0.015 0.05 0.600 1.9 0.700 2.0 0.600 2.0 0.700 2.1 0.600 2.1 0.700 2 100 100 ...
Page 5
... C and 85 C. Note 5: The LT1168AC/LT1168C are guaranteed to meet specified performance from The LT1168AC/LT1168C are designed, characterized and expected to meet specified performance from – and 85 C but are not tested or QA sampled at these temperatures. The LT1168AI/LT1168I are guaranteed to meet specified performance from – ...
Page 6
... GAIN = 1 100 1/f CORNER = 7Hz GAIN = 10 GAIN = 100, 1000 10 1/f CORNER = 3Hz BW LIMIT GAIN = 100 BW LIMIT GAIN = 1000 100 1k 10k 100k FREQUENCY (Hz) LT1168 • G01 Current Noise Density vs Frequency 1000 V = 15V 100 1/f CORNER = 55Hz 100 1000 FREQUENCY (Hz) ...
Page 7
... OUT 100 100 GAIN 0.10 0.05 0 0.05 0.10 1168 G29 FALLING EDGE 300 1000 1168 G26 LT1168 Settling Time (0.1%) vs Load Capacitance FALLING EDGE RISING EDGE 100, FALLING EDGE 100 10, 24 RISING EDGE FALLING EDGE 10 15V ...
Page 8
... LT1168 W U TYPICAL PERFOR A CE CHARACTERISTICS Output Voltage Swing vs Load Current + 15V – 0 – 1 – 1 – 2 – 2.5 S – 2.5 S – 2.0 S – 1.5 S – 1.0 S – 0.5 S – 0.01 0 OUTPUT CURRENT (mA) Large-Signal Transient Response ...
Page 9
... I OS 100 –100 –200 –300 –400 –500 –75 –50 – 100 125 TEMPERATURE 1168 G30 R6 30k 6 OUTPUT – – 30k REF 5 – – DIFFERENCE AMPLIFIER STAGE 1168 F01 LT1168 1k 10k 100k 1168 G23 9 ...
Page 10
... The reference terminal is one end of one of the four 30k resistors around the difference amplifier. The output volt age of the LT1168 (Pin 6) is referenced to the voltage on also flows through G the reference terminal (Pin 5). Resistance in series with the REF pin must be minimized for best common mode rejection ...
Page 11
... REF pin where resistance must be kept to minimum for best CMRR and lowest gain error. Input Bias Current Return Path The low input bias current of the LT1168 (250pA) and the high input impedance (200G ) allow the use of high impedance sources without introducing additional offset voltage errors, even when the full common mode range is – ...
Page 12
... INFORMATION The LT1168 is a low power precision instrumentation amplifier that requires only one external resistor to accu- rately set the gain anywhere from 1 to 1000. The LT1168 is trimmed for critical DC parameters such as gain error (0.04 10), input offset voltage (40 V, RTI), CMRR (90dB min and PSRR (103dB min 1). These trims allow the amplifier to achieve very high DC accuracy ...
Page 13
... The LT1168’s low current noise makes it ideal for EMG monitors that have high source impedances. Demonstrat- ing the LT1168’s ability to amplify low level signals, the circuit in Figure 6 takes advantage of the amplifier’s high gain and low noise operation. This circuit amplifies the low level nerve impulse signals received from a patient at Pins 2 and 3 ...
Page 14
... The LT1168’s low supply current, low supply voltage operation and low input bias currents allow it to fit nicely into battery-powered applications. Low overall power dissipation necessitates using higher impedance bridges. The single supply pressure monitor application, Figure 7, shows the LT1168 connected to the differential output 3.5k 3.5k ...
Page 15
... TYP 0.125 0.020 (3.175) MIN (0.508) MIN 0.018 0.003 0.100 (2.54) (0.457 0.076) BSC LT1168 OUTPUT –3dB (2 )(R1)(C1) = 1.59Hz 1168 TA02 LT1168 4-DIGIT 4 DVM 1/4 LT1114 9 – 180k 50k 100k R4 100k 1168 TA04 0.400* (10 ...
Page 16
... COMMENTS 100 50pA 100 105 100, Slew Rate = 30V/ s Lower Noise than LT1168 7.5nV 1168i LT/TP 0300 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 0 < 0.8V 1 > 2.4V Hz 1168 TA06 SO8 1298 ...