Datasheet
7
LTC1404
1404fa
INPUT FREQUENCY (kHz)
10
SPURIOUS-FREE DYNAMIC RANGE (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100 1000
1404 G16
f
SAMPLE
= 600kHz
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Unipolar Mode Peak Harmonic or
Spurious Noise vs Input Frequency
Bipolar Mode Power Supply
Feedthrough vs Ripple Frequency
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
2.440
2.438
2.436
2.434
2.432
2.430
2.428
2.426
2.424
2.422
2.420
–25 0 25
1404 G20
50 75 100 125
LOAD CURRENT (mA)
–8
REFERENCE VOLTAGE (V)
–6
–4
–3 1
1404 G21
–7 –5
–2
–1
0
2.45
2.44
2.43
2.42
2.41
2.40
2.39
Reference Voltage vs Temperature
Reference Voltage vs
Load Current
SOURCE RESISTANCE (Ω)
10
ACQUISITION TIME (µs)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
100 1k 10k
1404 G22
T
A
= 25°C
Acquisition Time vs
Source Impedance
Unipolar Mode Power Supply
Feedthrough vs Ripple Frequency
INPUT FREQUENCY (kHz)
10
SPURIOUS-FREE DYNAMIC RANGE (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100 1000
1404 G17
f
SAMPLE
= 600kHz
Bipolar Mode Peak Harmonic or
Spurious Noise vs Input Frequency
INPUT FREQUENCY (kHz)
80
70
60
50
40
30
20
10
0
100
1404 G14
10
1000
SIGNAL/(NOISE + DISTORTION) (dB)
f
SAMPLE
= 600kHz
V
IN
= 0dB
V
IN
= –20dB
V
IN
= –60dB
Unipolar Mode S/(N + D) vs Input
Frequency and Amplitude
INPUT FREQUENCY (kHz)
80
70
60
50
40
30
20
10
0
100
1404 G15
10
1000
SIGNAL/(NOISE + DISTORTION) (dB)
f
SAMPLE
= 600kHz
V
IN
= 0dB
V
IN
= –20dB
V
IN
= –60dB
Bipolar Mode S/(N + D) vs Input
Frequency and Amplitude
RIPPLE FREQUENCY (kHz)
1
POWER SUPPLY FEEDTHROUGH (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
10 100 1000
1404 G19
A
IN
= 0dB
A
IN
FREQUENCY = 100kHz
f
SAMPLE
= 600kHz
V
SS
(V
RIPPLE
= 10mV)
V
CC
(V
RIPPLE
= 1mV)
RIPPLE FREQUENCY (kHz)
1
POWER SUPPLY FEEDTHROUGH (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
10 100 1000
1404 G18
A
IN
= 0dB
A
IN
FREQUENCY = 100kHz
f
SAMPLE
= 600kHz
V
CC
(V
RIPPLE
= 1mV)