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参数资料
| 型号： | LT1568 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | Very Low Noise, High Frequency Active RC, Filter Building Block |
| 中文描述： | 极低噪声，高频有源RC，滤波器积木 |
| 文件页数： | 5/16页 |
| 文件大小： | 271K |
| 代理商： | LT1568 |
LT1568
5
1568f
SYMBOL
PARAMETER
Filter Gain, f
C
= 10MHz,
V
S
= 5V, R
FIL
= 128
(Measured with Respect to DC Gain)
CONDITIONS
Test Frequency = 1MHz (0.1 f
C
)
Test Frequency = 7.5MHz (0.75 f
C
)
Test Frequency = 10MHz (1 f
C
)
Test Frequency = 20MHz (2 f
C
)
Test Frequency = 40MHz (4 f
C
)
f
C
= 1MHz, f
IN
= f
C
f
C
= 10MHz, f
IN
= f
C
f
C
= 1MHz, R
FIL
= 1.28k, BW = 2MHz
f
C
= 10MHz, R
FIL
= 128
, BW = 20MHz
f
C
= 1MHz, R
FIL
= 1.28k,
f
IN
= 200kHz, V
IN
= 1V
P-P
f
C
= 10MHz, R
FIL
= 128
,
f
IN
= 2MHz, V
IN
= 1V
P-P
MIN
–0.3
–1.2
–3.1
–12.2
TYP
0.15
–0.50
–2.30
–11.2
–19.1
±
0.02
±
0.02
22
60
–84
MAX
0.5
0.0
–1.5
–10.2
UNITS
G
G
G
G
dB
dB
dB
dB
dB
dB
dB
Filter Gain Mismatch
(
V
OUTA
–
V
OUTB
)
Wideband Output Noise
G
G
–0.4
–0.5
0.4
0.5
μ
V
RMS
μ
V
RMS
THD
Total Harmonic Distortion
dB
–75
dB
Specifications are for the OUTA or OUTB of a single 2nd order section(A or B) with respect to V
GND
= V
GNDA
= V
GNDB
, gain = 1,
R
FIL
= R11 = R21 = R31 = R12 = R22 = R32, (see Block Diagram) The
G
denotes the specifications which apply over the full
operating temperature range, otherwise specifications and typcial values are at T
A
= 25
°
C. V
S
= single 5V, EN pin to logic “low,”
R
L
= 400
connected to midsupply, unless otherwise noted.
Specifications are for the differential output (OUTA – OUTA or OUTB
– OUTB) of a single 2nd order section(A or B), gain = –2,
R
FIL
= R11 = R21 = R31 = R12 = R22 = R32. All voltages are with respect to V
GND
= V
GNDA
= V
GNDB
. The
G
denotes the specifications
which apply over the full operating temperature range, otherwise specifications and typical values are at T
A
= 25
°
C.
V
S
= single 5V, EN pin to logic “low,” R
LDIFF
= 800
connected at midsupply, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
ADC
DC Gain
V
OS(OUT)
DC Offset Voltage
V
S
= 3V, f
C
= 1MHz, R
FIL
= 1.28k
(OUTA – OUTA) or (OUTB – OUTB)
V
S
= 5V, f
C
= 1MHz, R
FIL
= 1.28k
V
S
=
±
5V, f
C
= 1MHz, R
FIL
= 1.28k
V
OS(OUT)
DC Offset Voltage Mismatch
V
S
= 3V, f
C
= 1MHz, R
FIL
= 1.28k
(OUTA – OUTA) – (OUTB – OUTB)
V
S
= 5V, f
C
= 1MHz, R
FIL
= 1.28k
V
S
=
±
5V, f
C
= 1MHz, R
FIL
= 1.28k
Transfer Function Characteristics for Each Section (A or B) to Differential Output (OUTA – OUTA or OUTB – OUTB)
f
C
Cutoff Frequency Range (Note 7)
V
S
= 3V, V
S
= 5V, V
S
=
±
5V
TC
Cutoff Frequency Temperature Coefficient
Filter Gain, f
C
= 1MHz,
Test Frequency = 300kHz (0.3 f
C
)
V
S
= 5V, R
FIL
= 1.28k (Note 8)
Test Frequency = 750kHz (0.75 f
C
)
(Measured with Respect to DC Gain)
Test Frequency = 1MHz (1 f
C
)
Test Frequency = 2MHz (2 f
C
)
Test Frequency = 4MHz (4 f
C
)
Filter Gain, f
C
= 10MHz,
Test Frequency = 1MHz (0.1 f
C
)
V
S
= 5V, R
FL
= 128
(Note 8)
Test Frequency = 7.5MHz (0.75 f
C
)
(Measured with Respect to DC Gain)
Test Frequency = 10MHz (1 f
C
)
Test Frequency = 20MHz (2 f
C
)
Test Frequency = 40MHz (4 f
C
)
MIN
TYP
–2
6
2
–5
2
–2
2
MAX
UNITS
V/V
mV
mV
mV
mV
mV
mV
G
G
G
G
–4
–12
–20
–8
–12
–15
16
15
10
8
12
15
G
G
G
G
0.2
10
MHz
G
±
1
ppm/
°
C
G
G
G
G
–0.05
–1.40
–3.60
–13.7
0.10
–1.10
–3.20
–13.1
–25.0
0.1
–0.8
–2.6
–12.1
–24.3
0.25
–0.80
–2.70
–12.5
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
G
G
G
G
–0.20
–1.30
–3.30
–13.1
0.30
–0.20
–1.90
–11.1
FILTER ELECTRICAL CHARACTERISTICS
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