LTC6902 Datasheet, PDF (2/16 Pages) Linear Technology – Multiphase Oscillator with Spread Spectrum Frequency Modulation

LTC6902
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage (V⁺) to GND ........................– 0.3V to 6V
Voltage On Any Pin
(Referred to GND) ......................... – 0.3V to (V⁺ + 0.3V)
Operating Temperature Range (Note 9)
LTC6902C .......................................... – 40°C to 85°C
LTC6902I ............................................ – 40°C to 85°C
Specified Temperature Range (Note 10)
LTC6902C .......................................... – 40°C to 85°C
LTC6902I ............................................ – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
V⁺ 1
DIV 2
PH 3
OUT1 4
OUT2 5
TOP VIEW
10 SET
9 MOD
8 GND
7 OUT4
6 OUT3
MS PACKAGE
10-LEAD PLASTIC MSOP
T_JMAX = 150°C, θ_JA = 250°C/W
ORDER
PART NUMBER
LTC6902CMS
LTC6902IMS
MS PART MARKING
LTK2
LTK3
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS _{The q denotes the specifications which apply over the full operating}
temperature range, otherwise specifications are at T_A = 25°C. V⁺ = 2.7V to 5.5V, R_L= 5k, C_L = 5pF, Pin 3 (PH) = 0V (2-phase, M = 1)
unless otherwise specified. Pin 9 (MOD) is at 0V unless otherwise specified. R_SET is defined as a resistor connected from the SET pin
to the V⁺ pin. R_MOD is defined as a resistor connected from the MOD pin to the V⁺ pin.
SYMBOL
∆f_OUT
R_SET
∆f_OUT/∆T
∆f_OUT/∆V
PARAMETER
CONDITIONS
Frequency Accuracy (Notes 2, 3)
Frequency Setting Resistor Range
V⁺ = 5V
5kHz ≤ f_OUT ≤ 10MHz
1kHz ≤ f_OUT ≤ 5kHz
10MHz ≤ f_OUT ≤ 20MHz
5kHz ≤ f_OUT ≤ 10MHz, LTC6902C
5kHz < f_OUT ≤ 10MHz, LTC6902I
V⁺ = 2.7V
5kHz ≤ f_OUT ≤ 10MHz
1kHz ≤ f_OUT ≤ 5kHz
5kHz ≤ f_OUT ≤ 10MHz, LTC6902C
5kHz ≤ f_OUT ≤ 10MHz, LTC6902I
∆f_OUT < 1.5%, V⁺ = 5V
∆f_OUT < 1.5%, V⁺ = 2.7V
Frequency Drift Over Temperature
(Note 3)
R_SET = 63.2k
Frequency Drift Over Supply (Note 3) V⁺ = 2.7V to 5V, R_SET = 63.2k
Timing Jitter (Note 4)
20k ≤ R_SET ≤ 400k
Pin 2 = V⁺ (N = 100)
Pin 2 = Open (N = 10)
Pin 2 = 0V (N = 1)
MIN TYP MAX
±0.5 ±1.5
±2.0
q
±3.0 ±4.0
q
±2.0
q
±2.5
±0.5 ±1.5
±2.0
q
±2.0
q
±2.5
q 20
400
q 20
400
q
± 0.004
q
0.04 0.12
0.1
0.2
0.6
UNITS
%
%
%
%
%
%
%
%
%
kΩ
kΩ
%/°C
%/V
%
%
%
Long-Term Stability of
Output Frequency
Duty Cycle (Note 5)
Pin 2 = V⁺ or Open (N = 100 or 10)
Pin 3 = 0V (2-Phase, M = 1)
Pin 3 = Open (3-Phase, M = 3)
Pin 3 = V⁺ (4-Phase, M = 4)
Pin 2 = 0V (N = 1)
Pin 3 = 0V (2-Phase, M = 1)
Pin 3 = Open (3-Phase, M = 3)
Pin 3 = V⁺ (4-Phase, M = 4)
300
ppm/√kHr
q 49.0 50.0 51.0
%
q 32.3 33.3 34.3
%
q 49.0 50.0 51.0
%
q 45.0 50.0 55.0
%
q 32.3 33.3 34.3
%
q 49.0 50.0 51.0
%
6902f
2