LTC1565-31
ELECTRICAL CHARACTERISTICS
and Pin 5 open unless otherwise specified.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V (V+ = 5V, V– = 0V), RLOAD = 10k from each output to AC ground,
PARAMETER
CONDITIONS
V = 5V
V = ±5V
S
MIN
TYP
MAX
UNITS
Output DC Offset Drift
–400
–400
µV/°C
µV/°C
S
Ground Voltage (Pin 3) in
Single Supply Applications
V = 5V
S
●
2.49
2.51
2.52
V
SHDN Pin Logic Thresholds
V = 5V, Minimum Logical “1”
V = 5V, Maximum Logical “0”
S
4.2
3.3
V
V
S
V = ±5V, Minimum Logical “1”
V = ±5V, Maximum Logical “0”
S
2.75
2.50
V
V
S
SHDN Pin Pull-Up Current
V = 5V
V = ±5V
S
5
9
µA
µA
S
Power Supply Current
V = 5V
V = ±5V
S
●
●
24
25
31
33
mA
mA
S
Power Supply Current in Shutdown Mode
Shutdown. Includes SHDN Pull-Up Current
V = 5V
●
●
4
10
8
20
16
40
µA
µA
S
V = ±5V
S
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
voltage.” The “common mode range” is the range of common mode
voltages for which the 250mV differential output has better than 65dB
P-P
2nd or 3rd harmonic distortion.
Note 2: Input and output voltages expressed as peak-to-peak numbers are
assumed to be fully differential.
Note 5: Thermal resistance varies depending upon the amount of PC board
metal attached to the device. θ is specified for a 3.8 square inch test
board covered with 2 oz copper on both sides.
Note 3: Output DC offset is measured between Pin 8 and Pin 7 with Pin 1
and Pin 2 connected to Pin 3.
JA
Note 6: Output DC offset measurements are performed by automatic test
equipment approximately 0.5 seconds after application of power.
Note 4: A 250mV , 100kHz differential signal is applied to Pins 1 and 2.
The DC voltages at Pins 1 and 2 are equal. This is the “common mode
P-P
U
U
U
PIN FUNCTIONS
+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.
The impedance seen at Pin 3 is 2.5kΩ in normal mode. In
shutdown, the pin is internally biased to the same levels
as normal mode. The impedance in shutdown mode is
typically 500kΩ but varies with supply voltage and
temperature.
V–, V+ (Pins 4, 6): Power Supply Pins. For a single 5V
supply (Pin 4 grounded), a quality 0.1µF ceramic bypass
capacitor is required from the positive supply pin (Pin 6)
tothenegativesupplypin(Pin4). Thebypassshouldbeas
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 0.1µF ceramic capacitor.
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 0.1µF
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.
The maximum voltage difference between the ground pin
(Pin 3) and the positive supply pin (Pin 6) should not
exceed 5.5V.
3