
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
fSAMPLE = 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 (
)
10
ACQUISITION
TIME
(
s)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
100
1k
10k
1404 G22
TA = 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
fSAMPLE = 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)
fSAMPLE = 600kHz
VIN = 0dB
VIN = –20dB
VIN = –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)
fSAMPLE = 600kHz
VIN = 0dB
VIN = –20dB
VIN = –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
AIN = 0dB
AIN FREQUENCY = 100kHz
fSAMPLE = 600kHz
VSS (VRIPPLE = 10mV)
VCC (VRIPPLE = 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
AIN = 0dB
AIN FREQUENCY = 100kHz
fSAMPLE = 600kHz
VCC (VRIPPLE = 1mV)