LT1806CS8 Linear Technology, LT1806CS8 Datasheet - Page 28

• Manufacturer Part Number: LT1806CS8
• Description: IC OPAMP R-R IN/OUT SNGL 8-SOIC
• Manufacturer: Linear Technology

Specifications of LT1806CS8

• Amplifier Type: General Purpose
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 140 V/µs
• Gain Bandwidth Product: 325MHz
• Current - Input Bias: 5µA
• Voltage - Input Offset: 100µV
• Current - Supply: 11mA
• Current - Output / Channel: 85mA
• Voltage - Supply, Single/dual (±): 2.5 V ~ 12.6 V, ±1.25 V ~ 6.3 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• -3db Bandwidth: -

FET Input, Fast, High Gain Photodiode Amplifi er
Figure 10 shows a fast, high gain transimpedance
amplifi er applied to a photodiode. A JFET buffer is used
for its extremely low input bias current and high speed.
The LT1097 and 2N3904 keep the JFET biased at I
for zero offset and lowest voltage noise. The JFET then
drives the LT1806, with R
back to the JFET input and setting the transimpedance
gain. C4 helps improve the phase margin of the fast loop.
Output voltage noise density was measured as 9nV/√Hz
with R
LT1806/LT1807
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION
LT1395
LT1399
LT1632/LT1633
LT1809/LT1810
LT1812/LT1813
LT1818/LT1819
LT6200/LT6201
LT6202/LT6203
28
PHOTODIODE
SIEMENS/
SFH213FA
INFINEON
F
short circuited. With R
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
V
S
–
400MHz Current Feedback Amplifi er
Triple 300MHz Current Feedback Amplifi er
Dual/Quad 45MHz, 45V/μs Rail-to-Rail Input and Output Amplifi ers
Single/Dual 180MHz Input and Output Rail-to-Rail Amplifi ers
3mA, 100MHz, 750V/μs Op Amp
9mA, 400MHz, 2500V/μs Op Amp
165MHz Rail-to-Rail Input and Output, 0.95nV/√Hz Low Noise
Op Amp
100MHz Rail-to-Rail Input and Output, 1.9nV/√Hz Op Amp
R1
10M
3
2
Figure 10. Fast, High Gain Photodiode Amplifi er
+
–
LT1097
●
V
V
FAX: [phone]
S
S
+
7
4
–
2200pF
C2
F
6
closing the high speed loop
0.1μF
C3
F
C1
100pF
varied from 100k to 1M,
1M
R2
R3
10k
R4
2.4k
●
www.linear.com
V
V
2N3904
S
S
2N5486
–
+
R5
33Ω
2
3
–
+
LT1806
R
F
V
V
S
S
*
+
7
4
–
*ADJUST PARASITIC CAPACITANCE AT
V
R
CHARACTERISTICS
S
F
= 5V
DSS
3pF
C4
FOR DESIRED RESPONSE
6
49.9Ω
total output noise was below 1mV
10MHz bandwidth. Table 4 shows results achieved with
various values of R
response with R
Table 4. Results Achieved for Various R
100k
200k
499k
1M
R
COMMENTS
800V/μs Slew Rate, Shutdown
0.1dB Gain Flatness to 150MHz, Shutdown
High DC Accuracy 1.35mV V
Max Supply Current 5.2mA/Amp
350V/μs Slew Rate, Shutdown, Low Distortion –90dBc at 5MHz
High Slew Rate
Ultrahigh Slew Rate
Lowest Noise
I
CC
F
= 2.5mA
50W
18067 F10
V
OUT
F
= 499k.
F
10% to 90%
and Figure 11 shows the time domain
RISE TIME
100mV/DIV
154ns
263ns
64ns
94ns
© LINEAR TECHNOLOGY CORPORATION 2000
OS(MAX)
Figure 11. Step Response
with R
, 70mA Output Current,
RMS
F
LT 0809 REV C • PRINTED IN USA
F
, 1.2V Output Step
= 499k
BANDWIDTH
20ns/DIV
measured over a
6.8MHz
4.6MHz
1.8MHz
3MHz
–3dB
18067fc
18067 F11