Datasheet LT1678, LT1679 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps |
| Pages / Page | 16 / 1 — FEATURES. DESCRIPTIO. Rail-to-Rail Input and Output. 100% Tested Low … |
| File Format / Size | PDF / 300 Kb |
| Document Language | English |
FEATURES. DESCRIPTIO. Rail-to-Rail Input and Output. 100% Tested Low Voltage Noise:. 3.9nV/. Hz Typ at 1kHz. 5.5nV/. Hz Max at 1kHz
Model Line for this Datasheet
Text Version of Document
LT1678/LT1679 Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps
U FEATURES DESCRIPTIO
■
Rail-to-Rail Input and Output
The LT®1678/LT1679 are dual/quad rail-to-rail op amps ■
100% Tested Low Voltage Noise:
offering both low noise and precision: 3.9nV/√Hz wideband
3.9nV/
√
Hz Typ at 1kHz
noise, 1/f corner frequency of 4Hz and 90nV peak-to-peak
5.5nV/
√
Hz Max at 1kHz
0.1Hz to 10Hz noise are combined with outstanding ■
Single Supply Operation from 2.7V to 36V
precision: 100µV maximum offset voltage, greater than ■
Offset Voltage: 100
µ
V Max
100dB common mode and power supply rejection and ■ Low Input Bias Current: 20nA Max 20MHz gain bandwidth product. The LT1678/LT1679 bring ■ High AVOL: 3V/µV Min, RL = 10k precision as well as low noise to single supply applications as ■ High CMRR: 100dB Min low as 3V. The input range exceeds the power supply by ■ High PSRR: 106dB Min 100mV with no phase inversion while the output can swing ■ Gain Bandwidth Product: 20MHz to within 170mV of either rail. ■ Operating Temperature Range: – 40°C to 85°C The LT1678/LT1679 are offered in the SO-8 and SO-14 ■ Matching Specifications packages. A full set of matching specifications are also ■ No Phase Inversion provided, facilitating their use in matching dependent appli- ■ 8-Lead SO and 14-Lead SO Packages
U
cations such as a two op amp instrumentation amplifier
APPLICATIO S
design. The LT1678/LT1679 are specified for supply volt- ages of ±15V, single 5V as well as single 3V. For a single ■ Strain Gauge Amplifiers amplifier with similiar performance, see the LT1677 data ■ Portable Microphones sheet. ■ Battery-Powered Rail-to-Rail Instrumentation ■ Low Noise Signal Processing , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Microvolt Accuracy Threshold Detection ■ Infrared Detectors
U TYPICAL APPLICATIO Instrumentation Amplifier with Shield Driver
3
0.1Hz to 10Hz Voltage Noise
+ 1/4 1 1k 30k LT1679 VS = ±2.5V 2 – RF 3.4k 15V 5 4 GUARD + RG 1/4 7 100Ω OUTPUT + 10 LT1679 6 + – 8 1/4 11 RG 30k INPUT LT1679 – 100Ω – 9 –15V VOLTAGE NOISE (50nV/DIV) GUARD GAIN = 1000 13 R 0 2 4 6 8 10 – F 3.4k TIME (sec) 1/4 14 16789 TA01 LT1679 16789 TA01b 12 + 1k sn16789 16789fs 1
U FEATURES DESCRIPTIO
■
Rail-to-Rail Input and Output
The LT®1678/LT1679 are dual/quad rail-to-rail op amps ■
100% Tested Low Voltage Noise:
offering both low noise and precision: 3.9nV/√Hz wideband
3.9nV/
√
Hz Typ at 1kHz
noise, 1/f corner frequency of 4Hz and 90nV peak-to-peak
5.5nV/
√
Hz Max at 1kHz
0.1Hz to 10Hz noise are combined with outstanding ■
Single Supply Operation from 2.7V to 36V
precision: 100µV maximum offset voltage, greater than ■
Offset Voltage: 100
µ
V Max
100dB common mode and power supply rejection and ■ Low Input Bias Current: 20nA Max 20MHz gain bandwidth product. The LT1678/LT1679 bring ■ High AVOL: 3V/µV Min, RL = 10k precision as well as low noise to single supply applications as ■ High CMRR: 100dB Min low as 3V. The input range exceeds the power supply by ■ High PSRR: 106dB Min 100mV with no phase inversion while the output can swing ■ Gain Bandwidth Product: 20MHz to within 170mV of either rail. ■ Operating Temperature Range: – 40°C to 85°C The LT1678/LT1679 are offered in the SO-8 and SO-14 ■ Matching Specifications packages. A full set of matching specifications are also ■ No Phase Inversion provided, facilitating their use in matching dependent appli- ■ 8-Lead SO and 14-Lead SO Packages
U
cations such as a two op amp instrumentation amplifier
APPLICATIO S
design. The LT1678/LT1679 are specified for supply volt- ages of ±15V, single 5V as well as single 3V. For a single ■ Strain Gauge Amplifiers amplifier with similiar performance, see the LT1677 data ■ Portable Microphones sheet. ■ Battery-Powered Rail-to-Rail Instrumentation ■ Low Noise Signal Processing , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Microvolt Accuracy Threshold Detection ■ Infrared Detectors
U TYPICAL APPLICATIO Instrumentation Amplifier with Shield Driver
3
0.1Hz to 10Hz Voltage Noise
+ 1/4 1 1k 30k LT1679 VS = ±2.5V 2 – RF 3.4k 15V 5 4 GUARD + RG 1/4 7 100Ω OUTPUT + 10 LT1679 6 + – 8 1/4 11 RG 30k INPUT LT1679 – 100Ω – 9 –15V VOLTAGE NOISE (50nV/DIV) GUARD GAIN = 1000 13 R 0 2 4 6 8 10 – F 3.4k TIME (sec) 1/4 14 16789 TA01 LT1679 16789 TA01b 12 + 1k sn16789 16789fs 1
