AD8380JSZ Analog Devices Inc, AD8380JSZ Datasheet - Page 13

• Manufacturer Part Number: AD8380JSZ
• Description: IC DECDRIVER LCD 6CH-OUT 44-MQFP
• Manufacturer: Analog Devices Inc
• Series: DecDriver™r

Specifications of AD8380JSZ

• Display Type: LCD
• Interface: Parallel
• Current - Supply: 500µA
• Voltage - Supply: 9 V ~ 24 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-MQFP, 44-PQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Configuration: -
• Digits Or Characters: -

In order to obtain the best matching, the traces to each of the
VREFHI pins of the AD8380s should be connected by an
approximately same length and same width circuit trace in a
“star” configuration. The source of the VREFHI voltage should
be at the center of the “star.” Therefore, the VREFHI currents
for two devices will not share a significant length of circuit trace,
and each trace will provide an approximately equal voltage drop.
In addition, if the VREFHI traces must be long, then the traces
should be widened to minimize differences in the voltage drops
due to differences in the VREFHI input currents of different
AD8380s. The dc resistance of these traces should be less than
100 mΩ. If the VREFHI input current is about 1 mA, then the
voltage drop will be about 100 µV.
DB[0:9]
STSQ/CS
A[0:2]
10
3
STBY
CLK
XFR
E/O
R/L
INV
DVCC
3.3V
LOGIC
DVEE
10 F
0.1 F
VREFHI
2.500V
DAC
0.1 F
VREFLO
10V
0.1 F
AVCCDAC
AVEEDAC
10 F
0.1 F
0.1 F
BYP
15V
AVCCBIAS
BIAS
AVEEBIAS
10 F
0.1 F
For example, if a trace length is 5 in. long (13 cm.), then the
trace width for a 1 oz. copper foil should be wider than 0.025 in.
(0.7 mm) in order to keep the trace impedance below 100 mΩ.
Driving a Capacitive Load
A purely capacitive load can react with output impedance of the
AD8380 resulting in overshoot and ringing in its step response.
To minimize this effect, and optimize settling time, it is recom-
mended that a 25 Ω resistor be placed in series with each of the
driver’s outputs as shown in Figure 10.
AVCC0,1
AVEE0
22 F
0.1 F
AVCC2,3
AVEE1,2
DRIVERS
0.1 F
AVEE3,4
AVCC4,5
22 F
0.1 F
AVEE5
VMID
7V
0.1 F
VID0 – VID5
6
10 F
(TYP FOR 6)
AD8380
24.9
R
S