Datasheet

LTC6655
5
6655fa
Typical perForMance characTerisTics
Characteristic curves are similar for most voltage options of the LTC6655. Curves from the LTC6655-1.25, LTC6655-2.5 and the
LTC6655-5 represent the range of performance across the entire family of references. Characteristic curves for other output voltages
fall between these curves and can be estimated based on their voltage output.
1.25V Load Regulation (Sinking)
1.25V Output Voltage Noise
Spectrum
1.25V Sinking Current with a
3.3µF Output Capacitor
1.25V Sourcing Current with a
3.3µF Output Capacitor
1.25V Shutdown Supply Current
vs Input Voltage 1.25V V
OUT
Distribution
1.25V Low Frequency
0.1Hz to 10Hz Noise
1.25V Output Voltage
Temperature Drift 1.25V Load Regulation (Sourcing)
200nV/
DIV
6655 G01
1s/DIV
TEMPERATURE (°C)
–50 –25
1.2496
OUTPUT VOLTAGE (V)
1.2498
1.2504
0
50
75
6655 G02
1.2502
1.2500
25
100
125
3 TYPICAL UNITS
OUTPUT CURRENT (mA)
–20
OUTPUT VOLTAGE CHANGE (ppm)
0
20
–30
–10
10
0.001 0.1 1 10
6655 G03
–40
0.01
125°C
25°C
–40°C
OUTPUT CURRENT (mA)
40
OUTPUT VOLTAGE CHANGE (ppm)
80
120
160
200
0.001 0.1 1 10
6655 G04
0
0.01
125°C
25°C
–40°C
FREQUENCY (kHz)
10
NOISE VOLTAGE (nV/√Hz)
15
25
35
40
0.01 1 10 1000
6655 G05
5
0.1
100
30
20
0
2.7µF
10µF
100µF
I
OUT
0mA
5mA
V
OUT
10mV/DIV
C
OUT
= 3.3µF 200µs/DIV
6655 G06
I
OUT
–5mA
0mA
V
OUT
10mV/DIV
C
OUT
= 3.3µF 200µs/DIV
6655 G07
INPUT VOLTAGE (V)
0
8
10
14
6 10
6655 G08
6
4
2 4
8 12 14
2
0
12
SUPPLY CURRENT (µA)
125°C
25°C
–40°C
V
OUT
(V)
1.2495
0
NUMBER OF PARTS
10
20
30
40
50
60
T
A
= 25°C
1.2498 1.2500 1.2503 1.2505
6655 G09