- 鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛�璨疯常IC缍�(w菐ng) > PDF鐩寗9708 > MAX11800GTC/V+T (Maxim Integrated Products)IC TOUCH SCREEN CTRLR LP 12WQFN PDF璩囨枡涓嬭級
鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉锛� | MAX11800GTC/V+T |
| 寤犲晢锛� | Maxim Integrated Products |
| 鏂囦欢闋佹暩(sh霉)锛� | 13/59闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC TOUCH SCREEN CTRLR LP 12WQFN |
| 鍏跺畠鏈夐棞鏂囦欢锛� | Automotive Product Guide |
| 鐢�(ch菐n)鍝佸煿瑷撴ā濉婏細 | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 妯欐簴鍖呰锛� | 2,500 |
| 椤炲瀷锛� | 闆婚樆 |
| 瑙告懜闈㈡澘鎺ュ彛锛� | 4 绶� |
| 杓稿叆鏁�(sh霉)/閸碉細 | 1 TSC |
| 鍒嗚鲸鐜囷紙浣嶏級锛� | 12 b |
| 瑭曚及濂椾欢锛� | 鍙緵 |
| 鏁�(sh霉)鎿�(j霉)鎺ュ彛锛� | 涓茶锛孲PI? |
| 鏁�(sh霉)鎿�(j霉)閫熺巼/閲囨ǎ鐜� (SPS锛孊PS)锛� | 105k |
| 闆绘簮闆诲锛� | 1.7 V ~ 3.6 V |
| 宸ヤ綔婧害锛� | -40°C ~ 105°C |
| 瀹夎椤炲瀷锛� | 琛ㄩ潰璨艰 |
| 灏佽/澶栨锛� | 12-WQFN 瑁搁湶鐒婄洡 |
| 渚涙噳鍟嗚ō鍌欏皝瑁濓細 | 12-TQFN-EP锛�4x4锛� |
| 鍖呰锛� | 甯跺嵎 (TR) |
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MAX11800鈥揗AX11803
Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
20
______________________________________________________________________________________
power dissipation condition is observed when the point
of contact is in the top left corner of the panel sensor.
The planar end-to-end resistance included in the cur-
rent path is minimal at this location. Keep the averaging
and panel settling durations to the minimum required
by the application when pressure measurements are
required. Table 3 summarizes the physical panel set-
tings for supported measurement types.
Touch-Detect Modes and Options
Figure 6 shows the internal circuitry in the
MAX11800鈥揗AX11803 used to detect the presence of
a touch on the panel. The selection of the pullup resis-
tance value (RTD = touch-detect resistance) and the
durations of the rough pullup interval (PUR = low-
impedance pullup) and fine pullup interval (PUF = high-
impedance pullup) are user-defined.
The MAX11800鈥揗AX11803 revert to the low-power
panel setup when placed in touch-detect mode (TDM).
Figure 6 shows the active panel drive switches (YMSW
and XPSW are omitted for simplicity). TSW is a dedicat-
ed pullup switch used in TDM. TSW is also used during
PUF and TDM. XPSW is activated during PUR periods.
TDRSEL allows the selection of an internal pullup resis-
tor value of either 50k
惟 or 100k惟.
The X and Y touch-screen plates create an open circuit
with no current flow in the panel when the panel is not
being touched. In this case, TOUCH (see Figure 6) is
low. When a touch causes contact between the panel X
and Y plates, a current path is created and TOUCH is
pulled high, as long as RPX + RPY (the sum of panel
end-to-end resistance) is much lower than RTD. Typical
open-circuit panel plate resistances range from 200
惟
to 1000
惟.
The MAX11800鈥揗AX11803 enter high-impedance
pullup mode (50k
惟 or 100k惟) when the panel is not
being touched. The device is idle in this mode until a
touch is detected. The YMSW and TSW transistors are
on, and the XPSW and PSW transistors are off. With no
touch present, the Y- input of the TSC is at ground and
the X+ input is at VDD - VTN, where VTN is the threshold
voltage of the TSW nMOS device. This is a low-power
mode in which no current is consumed until a panel
touch occurs. When a touch is present on the panel,
the touch-screen controller (TSC) X+ input is pulled low
by the touch panel plate resistance and the YMSW tran-
sistor. This causes TOUCH to assume a logic-high and
the devices either issue the TIRQ interrupt for direct
conversion modes (MAX11800鈥揗AX11803) or begin
self-timed scans for autonomous conversion mode
(MAX11800/MAX11801).
The value of the user-defined RTD depends on the
characteristics of the panel. To ensure reliable
detection values, worst-case panel resistance must
be checked against RTD. The interaction between
RTD and the panel (or external noise rejecting)
capacitance determines how quickly the panel can
be switched from measurement modes back to
touch monitoring mode without reporting false
touches or erroneous tags due to panel settling.
Panel touch status is also required to tag data from a
completed scan and measurement operation. Following
each scan operation, the panel must be returned to
TDM to determine if the panel is still being touched and
if the data obtained during the scan operation should
be considered valid. This operation is required since
the panel cannot be monitored for the presence of a
touch during the scan and measurement procedure.
The MAX11800鈥揗AX11803 must return to TDM after
completing a measurement and making a decision on
the touch status of the panel. The measurement proce-
dure is only completed upon resolution of the touch sta-
tus and when data is tagged and available for
readback. The characteristics of the return to TDM and
MODE
X+
X-
Y+
Y-
REF+
REF-
XVDD
GND
ADC_IN
U
X+
X-
Y
ADC_IN
U
VDD
GND
Y+
Y-
Z1
ADC_IN
GND
VDD
UY+
X-
Z2
U
GND
VDD
ADC_IN
Y+
X-
PUR
VDD (10
惟)
U
GND
U
鈥�
TDM or PUF
VDD through
50k
惟 or 100k惟
U
GND
U
鈥�
LPM
UUUUU
鈥�
Table 3. Summary of Physical Panel Settings for Supported Measurement Types
Note: The ADC input is fully differential with the negative input internally connected to GND. The MAX11800鈥揗AX11803 control
access to the PUR, PUF, TDM, and LPM, which do not require setup procedures.
U
indicates unconnected node.
鐩搁棞PDF璩囨枡 |
PDF鎻忚堪 |
|---|---|
| MS27484P22B35S | CONN PLUG 100POS STRAIGHT W/SCKT |
| MS27467P23A53S | CONN PLUG 53POS STRAIGHT W/SCKT |
| MAX11801GTC/V+T | IC TOUCH SCREEN CTRLR LP 12WQFN |
| MS27473T24F2PA | CONN PLUG 100POS STRAIGHT W/PINS |
| MAX11800ETC+T | IC TOUCH SCREEN CTLR 12-TQFN |
鐩搁棞浠ｇ悊鍟�/鎶€琛撳弮鏁�(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
|---|---|
| MAX11800TEVS+ | 鍔熻兘鎻忚堪:椤ず闁嬬櫦(f膩)宸ュ叿 SPI 4Ch Touch Screen Controller RoHS:鍚� 鍒堕€犲晢:4D Systems 鐢�(ch菐n)鍝�:4Display Shields 宸ュ叿鐢ㄤ簬瑭曚及:?OLED-160-G1, ?OLED-160-G2 鎺ュ彛椤炲瀷:Serial 宸ヤ綔闆绘簮闆诲:5 V |
| MAX11801ETC/V+ | 鍔熻兘鎻忚堪:瑙告懜灞忚綁(zhu菐n)鎻涘櫒鍜屾帶鍒跺櫒 I2C 4Ch Touch Screen Controller RoHS:鍚� 鍒堕€犲晢:Microchip Technology 椤炲瀷:Resistive Touch Controllers 杓稿叆椤炲瀷:3 Key 鏁�(sh霉)鎿�(j霉)閫熺巼:140 SPS 鍒嗚鲸鐜�:10 bit 鎺ュ彛椤炲瀷:4-Wire, 5-Wire, 8-Wire, I2C, SPI 闆绘簮闆诲:2.5 V to 5.25 V 闆绘簮闆绘祦:17 mA 宸ヤ綔婧害:- 40 C to + 85 C 灏佽 / 绠遍珨:SSOP-20 |
| MAX11801ETC/V+T | 鍔熻兘鎻忚堪:瑙告懜灞忚綁(zhu菐n)鎻涘櫒鍜屾帶鍒跺櫒 I2C 4Ch Touch Screen Controller RoHS:鍚� 鍒堕€犲晢:Microchip Technology 椤炲瀷:Resistive Touch Controllers 杓稿叆椤炲瀷:3 Key 鏁�(sh霉)鎿�(j霉)閫熺巼:140 SPS 鍒嗚鲸鐜�:10 bit 鎺ュ彛椤炲瀷:4-Wire, 5-Wire, 8-Wire, I2C, SPI 闆绘簮闆诲:2.5 V to 5.25 V 闆绘簮闆绘祦:17 mA 宸ヤ綔婧害:- 40 C to + 85 C 灏佽 / 绠遍珨:SSOP-20 |
| MAX11801ETC+ | 鍔熻兘鎻忚堪:瑙告懜灞忚綁(zhu菐n)鎻涘櫒鍜屾帶鍒跺櫒 I2C 4Ch Touch Screen Controller RoHS:鍚� 鍒堕€犲晢:Microchip Technology 椤炲瀷:Resistive Touch Controllers 杓稿叆椤炲瀷:3 Key 鏁�(sh霉)鎿�(j霉)閫熺巼:140 SPS 鍒嗚鲸鐜�:10 bit 鎺ュ彛椤炲瀷:4-Wire, 5-Wire, 8-Wire, I2C, SPI 闆绘簮闆诲:2.5 V to 5.25 V 闆绘簮闆绘祦:17 mA 宸ヤ綔婧害:- 40 C to + 85 C 灏佽 / 绠遍珨:SSOP-20 |
| MAX11801ETC+T | 鍔熻兘鎻忚堪:瑙告懜灞忚綁(zhu菐n)鎻涘櫒鍜屾帶鍒跺櫒 I2C 4Ch Touch Screen Controller RoHS:鍚� 鍒堕€犲晢:Microchip Technology 椤炲瀷:Resistive Touch Controllers 杓稿叆椤炲瀷:3 Key 鏁�(sh霉)鎿�(j霉)閫熺巼:140 SPS 鍒嗚鲸鐜�:10 bit 鎺ュ彛椤炲瀷:4-Wire, 5-Wire, 8-Wire, I2C, SPI 闆绘簮闆诲:2.5 V to 5.25 V 闆绘簮闆绘祦:17 mA 宸ヤ綔婧害:- 40 C to + 85 C 灏佽 / 绠遍珨:SSOP-20 |
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