LTC1063CS Linear Technology, LTC1063CS Datasheet - Page 8

• Manufacturer Part Number: LTC1063CS
• Manufacturer: Linear Technology

Specifications of LTC1063CS

• Architecture: Switched Capacitor
• Order Filter (max): 5th
• Single Supply Voltage (typ): 5/9/12/15V
• Dual Supply Voltage (typ): ±3/±5V
• Power Supply Requirement: Single/Dual
• Single Supply Voltage (min): 4.75V
• Single Supply Voltage (max): 16V
• Dual Supply Voltage (min): ±2.375V
• Dual Supply Voltage (max): ±8V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Package Type: SOIC
• Filter Type: Low Pass Filter
• Lead Free Status / RoHS Status: Not Compliant

PI FU CTIO S
Output Pin (Pin 7, N Package)
Pin 7 is the filter output. This pin can typically source over
20mA and sink 2mA. Pin 7 should not drive long coax
cables, otherwise the filter’s total harmonic distortion will
degrade.
Clock Input Pin (Pin 5, N Package)
An external clock when applied to pin 5 tunes the filter
cutoff frequency. The clock-to-cutoff frequency ratio is
100:1. The high (V
threshold levels are illustrated in Table 2. Square wave
clocks with duty cycles between 30% and 50% are strongly
recommended. Sinewave clocks are not recommended.
TEST CIRCUIT
LTC1063
Table 2. Clock Pin Threshold Levels
POWER SUPPLY
V
V
V
V
V
V
V
8
S
S
S
S
S
S
S
= ±2.5V
= ±5V
= ±7.5V
= ±8V
= 5V, 0V
= 12, 0V
=15V, 0V
U
U
HIGH
U
) and low (V
V
V
IN
–
V
1.5V
4.5V
4.8V
9.6V
12V
HIGH
3V
4V
0.1µF
LOW
1
2
3
4
) clock logic
LTC1063
Figure 3. Test Circuit for THD
V
0.5V
1.5V
1.6V
7.2V
LOW
1V
3V
9V
CLOCK IN
8
7
6
5
50k
0.1µF
Clock Output Pin (Pin 4, N Package)
Any external clock applied to the clock input pin appears
at the clock output pin. The duty cycle of the clock output
equals the duty cycle of the external clock applied to the
clock input pin. The clock output pin swings to the power
supply rails. When the LTC1063 is used in a self-clocking
mode, the clock of the internal oscillator appears at the
clock output pin with a 30% duty cycle. The clock output
pin can be used to drive other LTC1063s or other ICs. The
maximum capacitance, C
drive is illustrated in Figure 2.
V
Figure 2. Maximum Load Capacitance at the Clock Output Pin
+
+
–
LT1022
20pF
50k
200
180
160
140
120
100
80
60
40
20
0
1
V
V
V
S
S
S
1063 TC01
= ±2.5V
= ±5V
= ±7.5V
CLOCK FREQUENCY (MHz)
V
OUT
2
L(MAX)
3
, the clock output pin can
4
5 6 7 8 9
T
A
= 25°C
1063 F02
10
1063fa