AK4184 Datasheet, PDF (8/36 Pages) Asahi Kasei Microsystems – TSC with Keypad Scanner and GPIO Expander

[AK4184]
SWITCHING CHARACTERISTICS
Ta = -40°C to 85°C, AVDD = 2.5V to 3.6V, IOVDD = 1.6V to AVDD, CL = 20pF
Parameter
Symbol
min
typ
Internal oscillator frequency
fosc
0.9
1.3
Touch Panel (A/D Converter)
SCLK period
tCP
200
-
Sampling Time (Rin=600Ω)
Throughput Rate
tSam
fs
1.5
-
-
-
Conversion Time
tCONV
24
-
Timing Characteristics
SCLK Pulse Width Low
Pulse Width High
tCKL
tCKH
80
-
80
-
CSN “↓” to First SCLK “↓”
tCSS
300
-
CSN “↓” to DOUT Tri-State Disabled
tDV
-
-
Data Setup Time
tDS
40
-
Data Hold Time
tDH
40
-
Data Output Delay after SCLK“↓”
tDD
-
-
CSN “↑” to DOUT Hi-Z state
tCDZ
-
-
CSN “H” Time
tCSW
150
-
SCLK “↑” to CSN “↑”
tCSH
50
-
Reset Timing
RESETN Pulse Width (Note 5)
tRST
150
-
Note 5. Device is reset by pull RESETN pin to “L”.
CSN
SCLK
tCSS
DIN
tDV
DOUT
Hi-Z
RESETN
tCP
tDD
tCKH
tCKL
tDS
tDH
D11
D10
Figure 1. Timing Diagram
tRST
Figure 2. Power-down & Reset Timing
max
1.7
1000
-
125
-
-
-
-
50
-
-
50
70
-
-
-
Units
MHz
ns
μs
KHz
tCP
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tCSW
VIH
VIL
tCSH
VIH
VIL
tCDZ
Hi-Z
D0
VIH
VIL
50%IOVDD
VIL
MS0603-E-00
8
2007/04