LTC1748 Linear Technology, LTC1748 Datasheet - Page 5

• Manufacturer Part Number: LTC1748
• Description: 14-Bit 80Msps Low Noise ADC
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to GND (unless otherwise
noted).
Note 3: When these pin voltages are taken below GND or above V
will be clamped by internal diodes. This product can handle input currents
of greater than 100mA below GND or above V
Note 4: When these pin voltages are taken below GND, they will be
clamped by internal diodes. This product can handle input currents of
>100mA below GND without latchup. These pins are not clamped to V
TYPICAL PERFOR A CE CHARACTERISTICS
–120
–100
–110
–0.5
–1.0
–1.5
–2.5
–2.0
–20
–30
–40
–50
–60
–70
–80
–90
–10
0.5
2.5
2.0
1.5
1.0
0
0
0
0
8192 Point FFT,
Input Frequency = 15.068MHz,
–10dB, 3.2V Range
INL, 3.2V Range
T
T
A
A
= 25 C
= 25 C
5
4096
10
FREQUENCY (MHz)
OUTPUT CODE
15
8192
20
25
12288
30
W
35
1748 G04
1748 G01
16384
U
40
DD
without latchup.
–120
–100
–110
–0.2
–0.4
–0.6
–0.8
–1.0
–30
–40
–50
–70
–10
–20
–60
–80
–90
0.2
1.0
0.8
0.6
0.4
0
0
0
0
DNL, 3.2V Range
8192 Point FFT,
Input Frequency = 15.068MHz,
–20dB, 3.2V Range
T
T
A
A
= 25 C
= 25 C
5
DD
, they
4096
10
DD
.
FREQUENCY (MHz)
OUTPUT CODE
15
8192
20
Note 5: V
sine wave, input range = 1.6V differential, unless otherwise specified.
Note 6: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 7: Bipolar offset is the offset voltage measured from – 0.5 LSB
when the output code flickers between 00 0000 0000 0000 and 11
1111 1111 1111.
Note 8: Guaranteed by design, not subject to test.
Note 9: Recommended operating conditions.
25
12288
30
DD
= 5V, f
35
1748 G05
1748 G02
16384
40
SAMPLE
= 80MHz, differential ENC/ENC = 2V
–100
–110
–120
–100
–110
–120
–20
–30
–40
–50
–70
–80
–90
–20
–30
–40
–50
–70
–80
–90
–10
–60
–10
–60
0
0
0
0
8192 Point FFT,
Input Frequency = 15.068MHz,
–1dB, 3.2V Range
8192 Point FFT,
Input Frequency = 30.068MHz,
–1dB, 3.2V Range
T
T
A
A
= 25 C
= 25 C
5
5
10
10
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FREQUENCY (MHz)
FREQUENCY (MHz)
15
15
20
20
LTC1748
25
25
P-P
30
30
80MHz
35
35
1748 G03
1748 G06
1748fa
5
40
40