Datasheet

LTC2238/LTC2237/LTC2236
7
223876fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2238: SNR and SFDR vs
Sample Rate, 2V Range,
f
IN
= 5MHz, –1dB
LTC2238: SNR vs Input Level,
f
IN
= 30MHz, 2V Range, 65Msps
LTC2238: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
O
VDD
= 1.8V
LTC2238: I
VDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB
LTC2237: Typical INL,
2V Range, 40Msps
LTC2237: Typical DNL,
2V Range, 40Msps
LTC2237: 8192 Point FFT,
f
IN
= 5MHz, –1dB, 2V Range,
40Msps
LTC2238: SFDR vs Input Level,
f
IN
= 30MHz, 2V Range, 65Msps
LTC2238: SFDR vs Input Frequency,
–1dB, 2V Range, 65Msps
INPUT FREQUENCY (MHz)
0
85
90
100
150
223876 G10
80
75
50 100 200
70
65
95
SFDR (dBFS)
SAMPLE RATE (Msps)
0
SNR AND SFDR (dBFS)
80
90
100
80
223876 G11
70
60
50
10 20 30
40 50
60 70 90 100
110
SFDR
SNR
INPUT LEVEL (dBFS)
–60
SNR (dBc AND dBFS)
30
40
50
–30
–10
223876 G12
20
10
0
–50 –40
dBFS
dBc
–20
60
70
80
0
INPUT LEVEL (dBFS)
–60
0
SFDR (dBc AND dBFS)
20
40
60
80
120
–50
–40 –30
dBFS
dBc
–20
223876 G13
–10 0
100
10
30
50
70
110
90
80dBc SFDR
REFERENCE LINE
SAMPLE RATE (Msps)
0
50
I
VDD
(mA)
55
60
65
70
20 40
60
80
223876 G14
75
80
10 30
50
70
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
0
I
OVDD
(mA)
1
2
3
4
20 40
60
80
223876 G15
5
6
10 30
50
70
CODE
0
INL ERROR (LSB)
0
0.25
0.50
1024
223876 G16
–0.25
–0.50
–1.00
256
512
768
–0.75
1.00
0.75
CODE
0
DNL ERROR (LSB)
0
0.25
0.50
1024
223876 G17
–0.25
–0.50
–1.00
256
512
768
–0.75
1.00
0.75
FREQUENCY (MHz)
0
AMPLITUDE (dB)
–60
–30
–20
20
223876 G18
–70
–80
–120
5
10
15
–100
0
–10
–40
–50
–90
–110