LT6234IDD#PBF Linear Technology, LT6234IDD#PBF Datasheet - Page 24

• Manufacturer Part Number: LT6234IDD#PBF
• Description: IC OP AMP DUAL 60MHZ R-R 8-DFN
• Manufacturer: Linear Technology

Specifications of LT6234IDD#PBF

• Amplifier Type: General Purpose
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 17 V/µs
• Gain Bandwidth Product: 60MHz
• Current - Input Bias: 1.5µA
• Voltage - Input Offset: 75µV
• Current - Supply: 1.15mA
• Current - Output / Channel: 55mA
• Voltage - Supply, Single/dual (±): 3 V ~ 12.6 V, ±1.5 V ~ 6.3 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -

LT6233/LT6233-10
LT6234/LT6235
Typical applicaTions
The LT6233 is applied as a transimpedance amplifier with
an I-to-V conversion gain of 10kΩ set by R1. The LT6233
is ideally suited to this application because of its low in-
put offset voltage and current, and its low noise. This is
because the 10k resistor has an inherent thermal noise of
13nV/√Hz or 1.3pA/√Hz at room temperature, while the
LT6233 contributes only 2nV and 0.8pA/√Hz. So, with
respect to both voltage and current noises, the LT6233 is
actually quieter than the gain resistor.
The circuit uses an avalanche photodiode with the cathode
biased to approximately 200V. When light is incident on
relaTeD parTs
PART NUMBER
LT1028
LT1677
LT1806/LT1807
LT6200/LT6201
LT6202/LT6203/LT6204
24
Low Power Avalanche Photodiode Transimpedance Amplifier
WWW.ADVANCEDPHOTONIX.COM
ADVANCED PHOTONIX
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
012-70-62-541
OUTPUT OFFSET = 500µV TYPICAL
BANDWIDTH = 7.8MHz
OUTPUT NOISE = 1mV
DESCRIPTION
Single, Ultralow Noise 50MHz Op Amp
Single, Low Noise Rail-to-Rail Amplifier
Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifier
Single/Dual, Low Noise 165MHz
Single/Dual/Quad, Low Noise, Rail-to-Rail Amplifier
≈ 200V BIAS
●
FAX: [phone]
I
0.1µF
S
10k
R2
C2
= 1.2mA
P-P
(20MHz MEASUREMENT BW)
–
+
LT6233
ENABLE
2.7pF
10k
●
R1
C1
www.linear.com
–5V
5V
623345 TA02a
the photodiode, it induces a current I
the amplifier circuit. The amplifier output falls negative
to maintain balance at its inputs. The transfer function
is therefore V
good settling characteristics. Output offset was measured
at better than 500µV, so low in part because R2 serves to
cancel the DC effects of bias current. Output noise was
measured at below 1mV
bandwidth, with C2 shunting R2’s thermal noise. As shown
in the scope photo, the rise time is 45ns, indicating a signal
bandwidth of 7.8MHz.
COMMENTS
0.85nV/√Hz
3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V
2.5V Operation, 550µV Max V
0.95nV√Hz, Rail-to-Rail Input and Output
1.9nV/√Hz, 3mA Max, 100MHz Gain Bandwidth
Photodiode Amplifier Time Domain Response
OUT
= –I
PD
• 10k. C1 ensures stability and
P-P
100ns/DIV
 LINEAR TECHNOLOGY CORPORA TION 2003
on a 20MHz measurement
OS
, 3.5nV/√Hz
LT 0111 REV C • PRINTED IN USA
PD
623345 TA02b
which flows into
OS
623345fc