LTC1565-31 Linear Technology, LTC1565-31 Datasheet - Page 3

• Manufacturer Part Number: LTC1565-31
• Description: 650kHz Continuous Time/ Linear Phase Lowpass Filter
• Manufacturer: Linear Technology

PIN
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
and Pin 5 open unless otherwise specified.
PARAMETER
Output DC Offset Drift
Ground Voltage (Pin 3) in
Single Supply Applications
SHDN Pin Logic Thresholds
SHDN Pin Pull-Up Current
Power Supply Current
Power Supply Current in Shutdown Mode
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Input and output voltages expressed as peak-to-peak numbers are
assumed to be fully differential.
Note 3: Output DC offset is measured between Pin 8 and Pin 7 with Pin 1
and Pin 2 connected to Pin 3.
Note 4: A 250mV
The DC voltages at Pins 1 and 2 are equal. This is the “common mode
+IN, –IN (Pins 1, 2): Input Pins. Signals can be applied to
either or both input pins. The DC gain from differential
inputs (Pin 1 to Pin 2) to the differential outputs (Pin 8 to
Pin 7) is 1.0V/V. The input range is described in the
Applications Information section.
GND (Pin 3): Ground. The ground pin is the reference
voltage for the filter and is internally biased to one-half the
total power supply voltage of the filter, maximizing the
dynamic range of the filter. For single supply operation,
the ground pin should be bypassed with a quality 0.1 F
ceramic capacitor to Pin 4. For dual supply operation,
connect Pin 3 to a high quality DC ground. A ground plane
should be used. A poor ground will increase noise and
distortion.
U
FUNCTIONS
U
P-P
, 100kHz differential signal is applied to Pins 1 and 2.
U
CONDITIONS
V
V
V
V
V
V
V
V
V
V
V
Shutdown. Includes SHDN Pull-Up Current
S
S
S
S
S
S
S
S
S
S
S
V
V
= 5V
= 5V
= 5V
= 5V, Minimum Logical “1”
= 5V, Maximum Logical “0”
= 5V, Minimum Logical “1”
= 5V, Maximum Logical “0”
= 5V
= 5V
= 5V
= 5V
S
S
= 5V
= 5V
A
= 25 C. V
The
S
denotes the specifications which apply over the full operating
= 5V (V
The impedance seen at Pin 3 is 2.5k in normal mode. In
shutdown, the pin is internally biased to the same levels
as normal mode. The impedance in shutdown mode is
typically 500k
temperature.
V
supply (Pin 4 grounded), a quality 0.1 F ceramic bypass
capacitor is required from the positive supply pin (Pin 6)
to the negative supply pin (Pin 4). The bypass should be as
close as possible to the IC. For dual supply applications
(Pin 3 is grounded), bypass Pin 6 to Pin 3 and Pin 4 to Pin
3 with a quality 0.1 F ceramic capacitor.
The maximum voltage difference between the ground pin
(Pin 3) and the positive supply pin (Pin 6) should not
exceed 5.5V.
voltage.” The “common mode range” is the range of common mode
voltages for which the 250mV
2nd or 3rd harmonic distortion.
Note 5: Thermal resistance varies depending upon the amount of PC board
metal attached to the device.
board covered with 2 oz copper on both sides.
Note 6: Output DC offset measurements are performed by automatic test
equipment approximately 0.5 seconds after application of power.
–
, V
+
= 5V, V
+
(Pins 4, 6): Power Supply Pins. For a single 5V
–
= 0V), R
but varies with supply voltage and
LOAD
P-P
JA
= 10k from each output to AC ground,
is specified for a 3.8 square inch test
differential output has better than 65dB
2.49
MIN
10
4
– 400
– 400
2.51
2.75
2.50
TYP
4.2
3.3
LTC1565-31
24
25
20
5
9
8
MAX
2.52
31
33
16
40
UNITS
3
V/ C
V/ C
mA
mA
V
V
V
V
V
A
A
A
A