LTC6255/LTC6256/LTC6257
6
625567fb
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 back-to-back diodes as well as ESD
protection diodes to each power supply. If the differential input voltage
exceeds 3.6V or the input extends more than 500mV beyond the power
supply, the input current should be limited to less than 10mA.
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 LTC6255C/LTC6256C/LTC6257C and LTC6255I/LTC6256I/
LTC6257I are guaranteed functional over the temperature range of –40°C
to 85°C. The LTC6255H/LTC6256H/LTC6257H are guaranteed functional
over the temperature range of –40°C to 125°C.
1.8V electricAl chArActeristics The
l
denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 1.8V, VCM = VOUT = 0.4V, CL = 10pF, VSHDN is
unconnected.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VOH
Output Swing High (Input Overdrive 30mV),
Measured from V+
No Load
l
24
55
60
mV
ISOURCE = 100A
l
30
65
75
mV
ISOURCE = 1mA
l
75
135
150
mV
ISC
Output Short-Circuit Current
l
12
3
17
mA
IS
Supply Current per Amplifier
l
53
35
60
68
83
A
Supply Current in Shutdown
l
1.4
2.0
3.0
A
ISHDN
Shutdown Pin Current
VSHDN = 0.5V
VSHDN = 1.3V
l
–480
–160
–350
–40
nA
VIL
SHDN Input Low Voltage
Disable
l
0.5
V
VIH
SHDN Input High Voltage
Enable
l
1.3
V
tON
Turn-On Time
SHDN Toggle From 0V to 1.8V
150
s
tOFF
Turn-Off Time
SHDN Toggle From 1.8V to 0V
50
s
BW
–3dB Closed Loop Bandwidth
AV = 1
4
MHz
GBW
Gain-Bandwidth Product
f = 200kHz
l
2.4
1.8
6
MHz
TS
Settling Time, 0.3V to 1.5V, Unity Gain
0.1%
0.01%
4
6
s
SR
Slew Rate
AV = –1, VOUT = 0.3V to 1.5V, CLOAD = 10pF
l
0.9
0.75
1.5
V/s
FPBW
Full Power Bandwidth (Note 8)
1.2VP-P
400
kHz
THD+N
Total Harmonic Distortion and Noise
f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V
VIN = 0.25V to 0.75V
0.006
84
%
dB
Note 5: The LTC6255C/LTC6256C/LTC6257C are guaranteed to meet
the specified performance from 0°C to 70°C. The LTC6255C/LTC6256C/
LTC6257C are designed, characterized and expected to meet specified
performance from –40°C to 85°C but are not tested or QA sampled at
these temperatures. The LTC6255I/LTC6256I/LTC6257I are guaranteed
to meet specified performance from –40°C to 85°C. The LTC6255H/
LTC6256H/LTC6257H are guaranteed to meet specified performance
from –40°C to 125°C.
Note 6: 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 7: The input bias current is the average of the currents through the
positive and negative input pins.
Note 8: Full power bandwidth is calculated from the slew rate FPBW =
SR/π VP-P.