LTC6268/LTC6269
6
62689f
For more information www.linear.com/LTC6268
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current in Shutdown
(Per Amplifier)
l
0.23 0.6
0.8
mA
mA
I
SHDN
Shutdown Pin Current V
SHDN
= 0.75V
V
SHDN
= 1.5V
l
l
–12
–12
2
2
12
12
µA
µA
V
IL
SHDN Input Low Voltage Disable
l
0.75 V
V
IH
SHDN Input High Voltage Enable. If SHDN is Unconnected, Amp Is Enabled
l
1.5 V
t
ON
Turn On Time, Delay from SHDN Toggle
to Output Reaching 90% of Target
SHDN Toggle from 0V to 2V 710 ns
t
OFF
Turn Off Time, Delay from SHDN Toggle
to Output High Z
SHDN Toggle from 2V to 0V 620 ns
BW –3dB Closed Loop Bandwidth A
V
= 1 350 MHz
GBW Gain-Bandwidth Product f = 10MHz 370 420 MHz
SR+ Slew Rate+ A
V
= 6 (R
F
= 499, R
G
= 100),
V
OUT
= 0.5V to 2.8V, Measured 20% to 80%,
C
LOAD
= 10pF
l
300
200
400
V/µs
V/µs
SR–
Slew Rate– A
V
= 6 (R
F
= 499, R
G
= 100),
V
OUT
= 2.8V to 0.5V, Measured 80% to 20%,
C
LOAD
= 10pF
l
180
130
260
V/µs
V/µs
FPBW Full Power Bandwidth (Note 7)
2V
P-P
40 MHz
HD Harmonic Distortion(HD2/HD3) A = 1, 10MHz. 1V
P-P
, V
CM
= 1.65V, R
L
= 1k –81/–90 dB
THD+N Total Harmonic Distortion and Noise A = 1, 10MHz. 1V
P-P
, V
CM
= 1.65V, R
L
= 1k 0.01
–78
%
dB
3.3V ELECTRICAL CHARACTERISTICS
The l denotes specifications that apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
SUPPLY
= 3.3V (V
+
= 3.3V, V
–
= 0V, V
CM
= mid-supply) R
L
= 1kΩ,
C
L
= 10pF, V
SHDN
is unconnected.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The inputs are protected by two series connected ESD protection
diodes to each power supply. The input current should be limited to less
than 1mA. The input voltage should not exceed 200mV beyond the power
supply.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 4: The LTC6268I/LTC6269I is guaranteed to meet specified
performance from –40°C to 85°C. The LTC6268H/LTC6269H is guaranteed
to meet specified performance from –40°C to 125°C.
Note 5: Thermal resistance varies with the amount of PC board metal
connected to the package. The specified values are for short traces
connected to the leads.
Note 6: The input bias current is the average of the currents
into the
positive and negative input pins. T
ypical measurement is for S8 package.
Note 7: Full Power Bandwidth is calculated from slew rate using the
following equation: FPBW = SR/(2π • V
PEAK
)
Note 8: This parameter is specified by design and/or characterization and
is not tested in production.
Note 9: The LTC6268/LTC6269 is capable of producing peak output
currents in excess of 135mA. Current density limitations within the
IC require the continuous current supplied by the output (sourcing or
sinking) over the operating lifetime of the part be limited to under 135mA
(Absolute Maximum).
