LTC6909 datasheet(3/20 Pages) LINER

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LTC6909

6909f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RSET

Range of the RSET Resistor

Connected Between the V+A Pin and

the SET Pin

4.5V ≤ V+ ≤ 5.5V

2.7V ≤ V+ ≤ 4.5V

2000

kΩ

Frequency Spread with SSFM

Enabled

RSET = 100k

MOD Pin = V+, GND or Open

●

±7

±10

±13

Long-Term Stability of the Output

Frequency (Note 9)

300

ppm/√kHr

Duty Cycle (Note 6)

SSFM Disabled

●

V+A, V+D

Operating Supply Voltage Range

●

2.7

5.5

V+ Combined Supply Current

RSET = 2M, RL = ∞, PH = 8, MOD = V+,

(fOUT = 12.5kHz), SSFM = fOUT/64

V+ = 5V

V+ = 2.7V

●

0.6

0.55

0.85

0.8

RSET = 20k, RL = ∞, PH = 3, MOD = GND,

(fOUT = 3.33MHz), SSFM = fOUT/16

V+ = 5V

V+ = 2.7V

●

2.4

1.55

2.7

1.8

RSET = 2M, RL = ∞, PH = 8, MOD = OUT1,

(fOUT = 12.5kHz), SSFM Off

V+ = 5V

V+ = 2.7V

●

0.4

0.37

0.65

0.6

VIH_MOD

High Level MOD Input Voltage

●

V+ – 0.4

VIL_MOD

Low Level MOD Input Voltage

●

0.4

IMOD

MOD Input Current (Note 7)

MOD Pin = V+, V+ = 5V

MOD Pin = GND, V+ = 5V

●

–4

–2

4μA

μA

VIH_PH

High Level PHx Input Voltage

PHx Refers to PH0, PH1 and PH2

●

V+ – 0.4

VIL_PH

Low Level PHx Input Voltage

PHx Refers to PH0, PH1 and PH2

●

0.4

IIN_PHX

Digital Input Current, PH0, PH1, PH2 0V < VIN < V+

●

±1

μA

VOH

High Level Output Voltage

(OUT1 Through OUT8)(Note 7)

V+ = 5V

No Load

5mA Load to GND

●

4.35

4.92

4.65

V+ = 2.7V

No Load

3mA Load to GND

●

2.1

2.63

2.4

VOL

Low Level Output Voltage

(OUT1 Through OUT8)(Note 7)

V+ = 5V

No Load

5mA Load to V+

●

0.07

0.25

0.55

V+ = 2.7V

No Load

3mA Load to V+

●

0.07

0.25

0.55

Output Rise Time (Note 8)

V+ = 5V

V+ = 2.7V

1.6

2.5

Output Fall Time (Note 8)

V+ = 5V

V+ = 2.7V

1.6

The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C or as noted. Test conditions are V+ = V+A = V+D = 2.7V to 5.5V, RL = 5k,

CL = 5pF unless otherwise noted. The modulation is turned off (MOD is connected to OUT1) and PH = 8 unless otherwise speciﬁed.

RSET is deﬁned as the resistor connected from the SET pin to the V+A pin.

ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: LTC6909C and the LTC6909I are guaranteed functional over the

operating temperature range of –40°C to 85°C.

Note 3: The LTC6909C is guaranteed to meet speciﬁed performance from

0°C to 70°C. The LTC6909C is designed, characterized and expected to

meet speciﬁed performance from –40°C to 85°C but is not tested or QA

sampled at these temperatures. The LTC6909I is guaranteed to meet

speciﬁed performance from –40°C to 85°C. The LTC6909H is guaranteed

to meet speciﬁed performance from –40°C to 125°C.

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