Datasheet

LTC6421-20
3
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DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input/Output Characteristic
G
DIFF
Gain V
IN
= ±100mV Differential
l
19.6 20 20.4 dB
ΔG Gain Matching Channel-to-Channel
l
±0.1 ±0.25 dB
TC
GAIN
Gain Temperature Drift V
IN
= ±100mV Differential
l
0.0015 dB/°C
V
SWINGMIN
Output Swing Low (V
OCM
= 1.5V) Each Output, V
IN
= ±400mV Differential
l
0.1 0.25 V
V
SWINGMAX
Output Swing High (V
OCM
= 1.5V) Each Output, V
IN
= ±400mV Differential
l
2.75 2.9 V
V
OUTDIFFMAX
Maximum Differential Output Swing
l
5 5.6 V
P-P
I
OUT
Output Current Drive 2V
P-P, OUT
(Note 10)
l
10 mA
V
OS
Input Offset Voltage Differential
l
–2 ±0.4 2 mV
TCV
OS
Input Offset Voltage Drift Differential
l
1.4 μV/°C
I
VRMIN
Input Common Mode Voltage Range, MIN
l
1V
I
VRMAX
Input Common Mode Voltage Range, MAX
l
1.6 V
R
INDIFF
Input Resistance (+IN, –IN) Differential
l
170 200 230
Ω
ΔR
IN
Input Impedance Matching Channel-to-Channel
l
±1 ±2.5 %
C
INDIFF
Input Capacitance (+IN, –IN) Differential, Includes Parasitic 1 pF
R
OUTDIFF
Output Resistance (+OUT, –OUT) Differential
l
20 25 36
Ω
CMRR Common Mode Rejection Ratio Input Common Mode Voltage 1V to 1.6V
l
45 68 dB
Output Common Mode Voltage Control
G
CM
Common Mode Gain V
OCM
= 1V to 1.6V 1 V/V
V
OCMMIN
Output Common Mode Range, MIN
l
1V
V
OCMMAX
Output Common Mode Range, MAX
l
1.6 V
V
OSCM
Common Mode Offset Voltage V
OCM
= 1.25V to 1.5V
l
–10 ±2 10 mV
TCV
OSCM
Common Mode Offset Voltage Drift
l
6 μV/°C
IV
OCM
V
OCM
Input Current
l
–15 –3 0 μA
ENABLEx Pins (x = A, B)
V
IL
ENABLEx Input Low Voltage
l
0.8 V
V
IH
ENABLEx Input High Voltage
l
2.4 V
ENABLEx Input Current
ENABLEx ≤ 0.8V
ENABLEx ≥ 2.4V
l
l
1.5
±0.5
3
μA
μA
Power Supply
V
S
Operating Supply Range
l
2.85 3 3.5 V
I
S
Supply Current ENABLEx ≤ 0.8V; per Amplifi er
l
40 50 mA
I
SHDN
Shutdown Supply Current ENABLEx ≥ 2.4V; per Amplifi er,
Inputs Floating
l
13 mA
PSRR Power Supply Rejection Ratio (Differential
Outputs)
V
+
= 2.85V to 3.5V
l
55 86 dB
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
+
= 3V, V
–
= 0V, +IN = –IN = V
OCM
= 1.25V, ENABLE = 0V, No R
L
unless
otherwise noted.