INPUT CURRENT NOISE DENSITY (pA/ Hz)
LTC6405
2.7GHz, 5V, Low Noise,
Rail-to-Rail Input Differential
Amplifier/Driver
Features Description
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Low Noise: 1.6nV/Hz RTI
The LTC 6405 is a very low noise, low distortion, fully
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Low Power: 18mA at 5V
differential input/output amplifier optimized for 5V, single
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Low Distortion (HD2/HD3):
supply operation. The LTC6405 input common mode range
82dBc/65dBc at 50MHz, 2V
is rail-to-rail, while the output common mode voltage is
P-P
97dBc/91dBc at 25MHz, 2V
independently adjustable by applying a voltage on the
P-P
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Rail-to-Rail Differential Input
V pin. This makes the LTC6405 ideal for level shifting
OCM
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4.5V to 5.25V Supply Voltage Range
signals with a wide common mode range for driving 12-bit
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Fully Differential Input and Output
to 16-bit single supply, differential input ADCs.
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Adjustable Output Common Mode Voltage
A 2.7GHz gain-bandwidth product results in 65dB linearity
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800MHz 3dB Bandwidth with A = 1
V
for 50MHz input signals. The LTC6405 is unity gain stable
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Gain-Bandwidth Product: 2.7GHz
and the closed-loop bandwidth extends from DC to 800MHz.
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Low Power Shutdown
The output voltage swing extends from near-ground to
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Available in 8-Lead MSOP and 16-Lead
4V, to be compatible with a wide range of ADC converter
3mm 3mm 0.75mm QFN Packages
input requirements. The LTC6405 draws only 18mA, and
has a hardware shutdown feature which reduces current
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consumption to 400A.
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Differential Input ADC Driver
The LTC6405 is available in a compact 3mm 3mm 16-pin
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Single-Ended to Differential Conversion
leadless QFN package, as well as an 8-lead MSOP package,
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Level-Shifting Ground-Referenced Signals
and operates over a 40C to 85C temperature range.
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Level-Shifting V -Referenced Signals
CC
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
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High-Linearity Direct Conversion Receivers
Technology Corporation. All other trademarks are the property of their respective owners.
t a
Single-Ended Input to Differential Output Input Noise Density vs Input
with Common Mode Level Shifting Common Mode Voltage
4 4
2V
P-P
V = 5V
S
1.8pF
NOISE MEASURED AT f = 1MHz
0V
V
S
50 196
200
3 3
i
n
5V
0.1F
61.9
2 2
SIGNAL
1V
P-P
GENERATOR
e
2.5V n
+
V
OCM
LTC6405UD 1 1
0.01F
2.5V
1V
P-P
0 0
200
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
1.8pF INPUT COMMON MODE VOLTAGE (V)
221
6405 TA01b
6405 TA01
6405fb
1
For more information www.linear.com/6405
INPUT VOLTAGE NOISE DENSITY (nV/ Hz)
pplication ypical
pplicationsLTC6405
a Maxi Mu M r (Note 1)
+
Total Supply Voltage (V to V ) ................................5.5V Specified Temperature Range (Note 5)
Input Current LTC6405I .............................................40C to 85C
(+IN, IN, V , SHDN, V ) (Note 2) ............ 10mA LTC6405C ................................................ 0C to 70C
OCM TIP
Output Short-Circuit Duration (Note 3) ............ Indefinite Junction Temperature ........................................... 150C
Operating Temperature Range Storage Temperature Range .................. 65C to 150C
(Note 4) ...............................................40C to 85C
p c F
TOP VIEW
16 15 14 13
TOP VIEW
SHDN 1 12 V
IN 11 8 +IN
9
+ +
V 2 11 V
V 22 7 SHDN
OCM
+ 17
V 33 6 V +
V 3 10 V
+OUT 44 5 OUT
V 4 9 V
OCM
MS8E PACKAGE
5 6 7 8
8-LEAD PLASTIC MSOP
T = 150C, = 40C/W, = 10C/W
JMAX JA JC
EXPOSED PAD (PIN 9) IS V , MUST BE SOLDERED TO PCB
UD PACKAGE
16-LEAD (3mm 3mm) PLASTIC QFN
T = 150C, = 68C/W, = 4.2C/W
JMAX JA JC
EXPOSED PAD (PIN 17) IS V , MUST BE SOLDERED TO PCB
D F M
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6405CMS8E#PBF LTC6405CMS8E#TRPBF LTDKN 8-Lead Plastic MSOP 0C to 70C
LTC6405IMS8E#PBF LTC6405IMS8E#TRPBF LTDKN 8-Lead Plastic MSOP 40C to 85C
LTC6405CUD#PBF LTC6405CUD#TRPBF LDKP 16-Lead (3mm 3mm) Plastic QFN 0C to 70C
LTC6405IUD#PBF LTC6405IUD#TRPBF LDKP 16-Lead (3mm 3mm) Plastic QFN 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: