Rainbow Electronics MAX108 - Manual (Page 26)

MAX108
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.
Static Parameter Definitions
Integral Nonlinearity
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
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
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.
±5V, 1.5Gsps, 8-Bit ADC with
On-Chip 2.2GHz Track/Hold Amplifier
26 ______________________________________________________________________________________
Figure 22. MAX108 Bypassing and Grounding
10 µ F
GNDD
V CC D
GNDA
V
CC
A
GNDI
V CC I
GNDI
1N5817
V
EE
V CC A = +4.75V TO +5.25V
V CC D = +4.75V TO +5.25V
V CC I = +4.75V TO +5.25V
V CC O = +3.0V TO V CC D
V EE = -4.75V TO -5.25V
NOTE:
LOCATE ALL 47pF CAPACITORS AS CLOSE
AS POSSIBLE TO THE MAX108 DEVICE.
GNDD
V CC O
10nF 10nF 47pF 47pF 47pF 47pF
10 µ F 10nF 10nF 47pF 47pF 47pF 47pF
10 µ F 10nF 10nF 47pF 47pF
10 µ F
10nF 10nF 47pF 47pF 47pF 47pF
10 µ F 10nF 10nF 47pF 47pF 47pF 47pF