MAX108 Maxim, MAX108 Datasheet - Page 26

• Manufacturer Part Number: MAX108
• Description: 5V / 1.5Gsps / 8-Bit ADC with On-Chip 2.2GHz Track/Hold Amplifier
• Manufacturer: Maxim

All supplies should be decoupled with large tantalum or
electrolytic capacitors at the point they enter the PCB.
For best performance, bypass all power supplies to the
appropriate ground with a 10µF tantalum capacitor to
filter power-supply noise, in parallel with a 0.1µF
capacitor and a high-quality 47pF ceramic chip capaci-
tor located very close to the MAX108 device to filter
very high-frequency noise.
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
±5V, 1.5Gsps, 8-Bit ADC with
On-Chip 2.2GHz Track/Hold Amplifier
Figure 22. MAX108 Bypassing and Grounding
26
V
GNDD
V
CC
GNDA
V
V
GNDI
GNDD
CC
CC
CC
O
______________________________________________________________________________________
A
I
D
10 F
10 F
10 F
10 F
10nF
10nF
10nF
10nF
Static Parameter Definitions
10nF
10nF
10nF
10nF
47pF
47pF
47pF
47pF
Integral Nonlinearity
47pF
47pF
47pF
47pF
47pF
47pF
47pF
47pF
47pF
47pF
GNDI
V
EE
1N5817
straight line can be either a best-straight-line fit or a line
drawn between the endpoints of the transfer function,
once offset and gain errors have been nullified. The
static linearity parameters for the MAX108 are mea-
sured using the best-straight-line fit method.
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1LSB. A
DNL error specification of less than 1LSB guarantees
no missing codes and a monotonic transfer function.
10 F
NOTE:
LOCATE ALL 47pF CAPACITORS AS CLOSE
AS POSSIBLE TO THE MAX108 DEVICE.
V
V
V
V
V
CC
CC
CC
CC
EE
10nF
A = +4.75V TO +5.25V
D = +4.75V TO +5.25V
I = +4.75V TO +5.25V
O = +3.0V TO V
= -4.75V TO -5.25V
10nF
CC
D
47pF
Differential Nonlinearity
47pF
47pF
47pF