Datasheet LT1996 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Precision, 100µA Gain Selectable Amplifier |
| Pages / Page | 24 / 8 — BLOCK DIAGRA. APPLICATIO S I FOR ATIO. Introduction. The Resistors. The … |
| File Format / Size | PDF / 351 Kb |
| Document Language | English |
BLOCK DIAGRA. APPLICATIO S I FOR ATIO. Introduction. The Resistors. The Op Amp
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Text Version of Document
LT1996
W BLOCK DIAGRA
10 9 8 7 6 M9 M27 M81 VCC OUT 450k/81 450k 4pF 450k/27 450k/9 – OUT 450k/9 + LT1996 450k/27 450k/81 4pF 450k P9 P27 P81 VEE REF 1 2 3 4 5 1996 BD
U U W U APPLICATIO S I FOR ATIO Introduction
of VEE. For many configurations though, the chip inputs will function rail-to-rail because of effective attenuation to The LT1996 may be the last op amp you ever have to stock. the +input. The output is truly rail-to-rail, getting to within Because it provides you with several precision matched 40mV of the supply rails. The gain bandwidth product of resistors, you can easily configure it into several different the op amp is about 560kHz. In noise gains of 2 or more, classical gain circuits without adding external compo- it is stable into capacitive loads up to 500pF. In noise gains nents. The several pages of simple circuits in this data below 2, it is stable into capacitive loads up to 100pF. sheet demonstrate just how easy the LT1996 is to use. It can be configured into difference amplifiers, as well as into
The Resistors
inverting and noninverting single ended amplifiers. The fact that the resistors and op amp are provided together in The resistors internal to the LT1996 are very well matched such a small package will often save you board space and SiChrome based elements protected with barrier metal. reduce complexity for easy probing. Although their absolute tolerance is fairly poor (±30%), their matching is to within 0.05%. This allows the chip to
The Op Amp
achieve a CMRR of 80dB, and gain errors within 0.05%. The resistor values are (450k/9), (450k/27), (450k/81) The op amp internal to the LT1996 is a precision device and 450k, connected to each of the inputs. The resistors with 15µV typical offset voltage and 3nA input bias cur- have power limitations of 1watt for the 450k and (450k/81) rent. The input offset current is extremely low, so match- resistors, 0.3watt for the (450k/27) resistors and 0.5watt ing the source resistance seen by the op amp inputs will for the (450k/9) resistors; however, in practice, power provide for the best output accuracy. The op amp inputs dissipation will be limited well below these values by the are not rail-to-rail, but extend to within 1.2V of VCC and 1V 1996f 8
W BLOCK DIAGRA
10 9 8 7 6 M9 M27 M81 VCC OUT 450k/81 450k 4pF 450k/27 450k/9 – OUT 450k/9 + LT1996 450k/27 450k/81 4pF 450k P9 P27 P81 VEE REF 1 2 3 4 5 1996 BD
U U W U APPLICATIO S I FOR ATIO Introduction
of VEE. For many configurations though, the chip inputs will function rail-to-rail because of effective attenuation to The LT1996 may be the last op amp you ever have to stock. the +input. The output is truly rail-to-rail, getting to within Because it provides you with several precision matched 40mV of the supply rails. The gain bandwidth product of resistors, you can easily configure it into several different the op amp is about 560kHz. In noise gains of 2 or more, classical gain circuits without adding external compo- it is stable into capacitive loads up to 500pF. In noise gains nents. The several pages of simple circuits in this data below 2, it is stable into capacitive loads up to 100pF. sheet demonstrate just how easy the LT1996 is to use. It can be configured into difference amplifiers, as well as into
The Resistors
inverting and noninverting single ended amplifiers. The fact that the resistors and op amp are provided together in The resistors internal to the LT1996 are very well matched such a small package will often save you board space and SiChrome based elements protected with barrier metal. reduce complexity for easy probing. Although their absolute tolerance is fairly poor (±30%), their matching is to within 0.05%. This allows the chip to
The Op Amp
achieve a CMRR of 80dB, and gain errors within 0.05%. The resistor values are (450k/9), (450k/27), (450k/81) The op amp internal to the LT1996 is a precision device and 450k, connected to each of the inputs. The resistors with 15µV typical offset voltage and 3nA input bias cur- have power limitations of 1watt for the 450k and (450k/81) rent. The input offset current is extremely low, so match- resistors, 0.3watt for the (450k/27) resistors and 0.5watt ing the source resistance seen by the op amp inputs will for the (450k/9) resistors; however, in practice, power provide for the best output accuracy. The op amp inputs dissipation will be limited well below these values by the are not rail-to-rail, but extend to within 1.2V of VCC and 1V 1996f 8
