LT1568 Ver la hoja de datos (PDF) - Linear Technology
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LT1568 Datasheet PDF : 16 Pages
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LT1568
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications and typical values are at TA = 25°C. VS = single 5V, EN pin to logic “low,” RL = 400Ω,
connected to midsupply, RFIL = R11 = R21 = R31 = R12 = R22 = R32, unless otherwise noted (see Block Diagram).
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
IB
Op Amp Input Bias Current
Inverter Bandwidth (Note 4)
VS = 3V
VS = 5V
VS = ±5V
q
0.5
2
µA
q
0.4
2
µA
q
– 0.2
2
µA
55
MHz
Inverter Gain (Sections A and B, Note 5)
Frequency = DC
Frequency = 2MHz
Frequency = 10MHz
q –0.2 0.01
0.2
dB
0.01
dB
0.27
dB
Inverter Phase Shift (Sections A and B,
Note 5)
Frequency = DC
Frequency = 2MHz
Frequency = 10MHz
180
DEG
179
DEG
176
DEG
SR
Slew Rate (OUTA, OUTB, OUTA,
OUTB) Pins
53
V/µs
VCM
Common Mode Input Voltage Range
VS = 3V
(GNDA and GNDB Pins, Note 6)
VS = ±5V
Single Supply GND Reference Voltage
VS = 5V, GNDA Tied to GNDB
VIL
EN Input Logic Low Level
VS = 3V, 5V or ±5V
VIH
EN Input Logic High Level
VS = 3V, 5V or ±5V
EN Input Pull-Up Resistor
tDIS
Disable (Shutdown) Time
tEN
Enable (Start-Up) Time
EN Pin Steps from 0V to V+
EN Pin Steps from V+ to 0V
1 to 1.9
V
–3.4 to 2.7
V
2.5
V
q
V+ – 2.1
V
q V+ – 0.6
V
30
40
kΩ
20
µs
100
µs
FILTER ELECTRICAL CHARACTERISTICS
Specifications are for the output (OUTA or OUTB) of a single 2nd order section (A or B) with respect to VGND = VGNDA = VGNDB,
gain = –1, RFIL = R11 = R21 = R31 = R12 = R22 = R32, (see Block Diagram). The q denotes the specifications which apply over the
full operating temperature range, otherwise specifications and typical values are at TA = 25°C. VS = single 5V, EN pin to logic “low,”
RL = 400Ω, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
ADC
DC Gain
q –1.01 –1 –0.99
V/V
VOS(OUT)
DC Offset Voltage
(VOUTA – VGNDA) or (VOUTB – VGNDB)
VS = 3V, fC = 1MHz, RFIL = 1.28k
VS = 5V, fC = 1MHz, RFIL = 1.28k
VS = ±5V, fC = 1MHz, RFIL = 1.28k
q
–5
2.6
15
mV
q –10
0.6
10
mV
q –12 –4.0
4
mV
∆VOS(OUT) DC Offset Voltage Mismatch
VS = 3V, fC = 1MHz, RFIL = 1.28k
q
–8
±4
8
mV
(VOUTA – VGNDA) – (VOUTB – VGNDB)
VS = 5V, VS = ±5V, fC = 1MHz, RFIL = 1.28k
q –10
±4
10
mV
Transfer Function Characteristics for Each Section (A or B) to Single-Ended Output (OUTA or OUTB)
fC
Cutoff Frequency Range (Note 7)
VS = 3V, VS = 5V, VS = ±5V
TC
Cutoff Frequency Temperature Coefficient
q 0.2
10
MHz
q
±1
ppm/°C
1568f
3
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