LTC1857/LTC1858/LTC1859
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1859 Typical INL Curve
2.0
1.5
1.0
DNL (LSB)
INL (LSB)
0.5
0
– 0.5
–1.0
–1.5
–2.0
–32768
–16384
0
CODE
16384
32767
1859 TA02
0.5
0
– 0.5
–1.0
–1.5
–2.0
–32768
–16384
0
CODE
16384
32767
1859 G02
MAGNITUDE (dB)
LTC1859 SINAD
vs Input Frequency
90
88
86
SINAD (dB)
84
82
80
78
76
74
1
10
INPUT FREQUENCY (kHz)
100
1859 G04
TOTAL HARMONIC DISTORTION (dB)
CHANNEL-TO-CHANNEL
OFFSET ERROR MATCHING (LSBs)
LTC1859 Channel-to-Channel Gain
Error Matching vs Temperature
1.0
INTERNAL REFERENCE VOLTAGE (V)
0.5
UNIPOLAR MODE
0
CHANGE IN REFCOMP VOLTAGE (V)
CHANNEL-TO-CHANNEL
GAIN ERROR MATCHING (LSBs)
BIPOLAR MODE
–0.5
–1.0
–50
–25
0
25
50
TEMPERATURE (°C)
6
U W
75
LTC1859 Typical DNL Curve
2.0
1.5
1.0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
LTC1859 Nonaveraged
4096-Point FFT Plot
f
SAMPLE
= 100kHz
f
IN
= 1kHz
SINAD = 86.95dB
THD = –101.42dB
0
5
10 15 20 25 30 35 40 45 50
FREQUENCY (kHz)
1869 G03
LTC1859 Total Harmonic
Distortion vs Input Frequency
–70
1.0
LTC1859 Channel-to-Channel
Offset Error Matching vs
Temperature
–80
0.5
BIPOLAR MODE
0
–90
UNIPOLAR MODE
–100
–0.5
–110
1
10
INPUT FREQUENCY (kHz)
100
1859 G05
–1.0
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
1959 G06
Internal Reference Voltage
vs Temperature
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
–50
–25
50
25
TEMPERATURE (°C)
0
75
100
1859 G08
Change in REFCOMP Voltage
vs Load Current
0.04
0.02
0
–0.02
100
1959 G07
–0.04
–50
–40
–30
–20
–10
LOAD CURRENT (mA)
0
10
1859 G09
185789f
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
