lt1568 Linear Technology Corporation, lt1568 Datasheet - Page 5

• Manufacturer Part Number: lt1568
• Description: Very Low Noise, High Frequency Active Rc, Filter Building Block
• Manufacturer: Linear Technology Corporation

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