ucb1200 NXP Semiconductors, ucb1200 Datasheet - Page 43

• Manufacturer Part Number: ucb1200
• Description: Advanced Modem/audio Analog Front-end
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1998 Jul 22
V
V
RES
S/N
THD
PBRR
SBR
OBR
Z
E
Touch screen
V
I
R
R
R
t
Eidle
Rpres
ADC; notes 11 and 12
RES
V
Z
I
STRTU
LI
o(load)
ligth_touch
i
O(RMS)
O(BIAS)
offset
I(BIAS)
I(AD0-AD3)
i
gs
ps
Advanced modem/audio analog front-end
SYMBOL
(RMS)
output voltage (RMS
value)
DC bias voltage
signal-to-noise ratio
total harmonic distortion
pass-band ripple rejection
stop-band rejection
out-of-band rejection
(RMS value)
load impedance
offset error
bias voltage
touch screen current
Max. touch screen
resistance to generate an
interrupt
ground switch on
resistance
power switch on
resistance
start up time of touch
screen bias voltage
generator
Idle pressure reading
Pressure reading:
light-touch - 1.5xEidle
pressure mode full scale
resistor reading
full scale AD0 - AD3
inputs
input impedance
input leakage current
resolution
resolution
PARAMETER
(17)
(18)
differentially measured
between TOUTP and
TOUTN
TOUTP/TOUTN; telecom
O/P path enabled
f
f > f
note 10
touch screen position
mode selected
touch screen position
mode selected
touch screen interrupt
mode selected
pressure mode selected,
open (no current drawn)
pressure mode selected,
2.2k for light touch, open
for idle
300 <ADC reading <1023
V
V
sht
ADO
AD3
< f < f
st
(9)(16)
= 7.5 V
= V
CONDITIONS
st
AD1
43
(9)
= V
AD2
=
1.35
1.2
70
600
10
65
7.0
50
MIN.
-
14
75
1.8
40
10
75
TYP.
Product specification
1.85
1.6
-65
1.2
25
100
2500
50
50
25
120
300
8.0
100
10
UCB1200
MAX.
V
V
bit
dB
dB
dB
dB
mV
mV
V
mA
LSB
LSB
bit
V
k
UNIT
s
A