LT1678/LT1679
TYPICAL APPLICATIO
Bridge Reversal Eliminates 1/f Noise and Offset Drift of a Low Noise, Non-autozeroed, Bipolar Amplifier.
Circuit Gives 14nV Noise Level or 19 Effective Bits Over a 10mV Span
VREF
3
4
φ1
5,6,7,8
2
100k
1
350Ω
350Ω
350Ω
350Ω
5V
+
1/2 LT1678
–
100Ω
0.1%
VREF
3
100k
4
5,6,7,8
2
1
2X
SILICONIX
Si9801
φ2
–
1/2 LT1678
+
7V
LT1461-5
10Ω
0.047µF 1k
0.1%
1k
0.1%
0.047µF
10Ω
VREF
10µF
0.1µF
100Ω
1µF
100Ω
1µF
REF+
IN+
LTC2440
IN–
REF–
φ1
φ2
≈2s
16789 TA02
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C-Load is a trademark of Linear Technology Corporation.
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
COMMENTS
Lowest Noise 0.85nV/√Hz
0.002% THD, Max Noise 1.2nV/√Hz
Similar to LT1007
Similar to LT1037
1GHz, 2.6nV/√Hz, Gain of 25 Stable
Precision C-LoadTM Stable
Rail-to-Rail 3.2nV/√Hz
4.2nV/√Hz, 10fA/√Hz
6nV/√Hz, 1fA/√Hz, IB = 10pA Max
3.5nV/√Hz
CLOAD to 1000pF, IB = 200pA Max
2.2MHz Bandwidth, 1.2V/µs SR
sn16789 16789fs
LT/TP 0104 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2003