Datasheet

5
LTC1325
TYPICAL PERFORMANCE CHARACTERISTICS
UW
LOAD CAPACITANCE (nF)
0
PGATE RISE TIME (ns)
400
800
1200
1000
600
200
4 8 12 16
1325 G10
2020 6 10 14 18
T
A
= 0°C
T
A
= 70°C
T
A
= 27°C
LOAD CAPACITANCE (nF)
0
PGATE FALL TIME (ns)
600
800
1000
900
700
500
300
100
16
LTC1325 G11
400
200
0
42 6 10 14 18
8
12
20
T
A
= 70°C
T
A
= 0°C
T
A
= 27°C
PGATE Fall Time vs
Load Capacitance
CODE
0
DIFFERENTIAL NONLINEARITY (LSB)
1024
1325 G12
256
512
768
1.0
0.5
0
–0.5
–1.0
128 384 640
896
V
DD
= 12V
f
CLK
= 500kHz
LOAD CAPACITANCE (nF)
0
0
DISCHARGE RISE AND FALL TIME (µs)
2
6
8
10
14
2
10
14
1325 G13
4
12
8
18
20
4
6
12 16

T
A
= 70°C
T
A
= 27°C
T
A
= 0°C

RISE TIME
FALL TIME
CODE
0
INTEGRAL NONLINEARITY (LSB)
1024
1325 G15
256
512
768
1.0
0.5
0
–0.5
–1.0
128 384 640
896
V
DD
= 12V
f
CLK
= 500kHz
Integral Nonlinearity
TEMPERATURE (°C)
–40
108
OSCILLATOR FREQUENCY (kHz)
109
111
112
113
118
115
0
40
60
1325 G16
110
116
117
114
–20
20
80
100
Oscillator Frequency vs
Temperature
TEMPERATURE (°C)
0
CLK TO D
OUT
VALID DELAY TIME (ns)
400
500
600
60
1325 G18
300
200
10 20 30 50 7040
80
100
0
700
D
OUT
GOING HIGH
D
OUT
GOING LOW
CLK to D
OUT
Enable Delay Time
vs Temperature
CLK to D
OUT
Valid Delay Time
vs Temperature
TEMPERATURE (°C)
0
0
CLK TO D
OUT
ENABLE DELAY TIME (ns)
50
150
200
250
500
350
20
40
50
1325 G17
100
400
450
300
10 30
60
70
80
NUMBER OF CELLS
1
MINIMUM CHARGE VOLTAGE (V)
7
1325 G14
35
16
14
12
10
8
6
4
2
0
2468
R
SENSE
= 1, VR1 = 1, VR0 = 1
L = 25µH TO 100µH
IRF9Z30PFET, 1N5819 DIODE
R
SENSE
= 0.15, VR1 = 1,VR0 = 1
L = 10µH TO 100µH
IRF9Z30PFET, 1N5819 DIODE
T
A
= 27°C, NiCd BATTERIES
V
CELL
= 1.4V NOMINAL
Discharge Rise and Fall Time
vs Load Capacitance
Minimum Charging Supply vs
Number of Cells
Differential Nonlinearity
PGATE Rise Time vs
Load Capacitance