ADS7845E Datasheet PDF - Burr-Brown Corporation
| Part Number | ADS7845E | |
| Description | TOUCH SCREEN CONTROLLER | |
| Manufacturers | Burr-Brown Corporation | |
| Logo |  |
|
|
There is a preview and ADS7845E download ( pdf file ) link at the bottom of this page. Total 12 Pages | ||
Preview 1 page No Preview Available !
®
ADS7845
ADS7845
TOUCH SCREEN CONTROLLER
FEATURES
q 5-WIRE TOUCH SCREEN INTERFACE
q RATIOMETRIC CONVERSION
q SINGLE SUPPLY: 2V to 5V
q UP TO 125kHz CONVERSION RATE
q SERIAL INTERFACE
q PROGRAMMABLE 8- OR 12-BIT RESOLUTION
q AUXILIARY ANALOG INPUTS
q FULL POWER-DOWN CONTROL
APPLICATIONS
q PERSONAL DIGITAL ASSISTANTS
q PORTABLE INSTRUMENTS
q POINT-OF-SALES TERMINALS
q PAGERS
q TOUCH-SCREEN MONITORS
GND
+VCC
DESCRIPTION
The ADS7845 is a 12-bit sampling analog-to-digital
converter (ADC) with a synchronous serial interface
and low on-resistance switches for driving touch
screens. Typical power dissipation is 750µW at a
125kHz throughput rate and a +2.7V supply. The
reference voltage (V ) can be varied between 1V and
REF
+VCC, providing a corresponding input voltage range
of 0V to VREF. The device includes a shutdown mode
which reduces typical power dissipation to under
0.5µW. The ADS7845 is guaranteed down to 2.7V
operation.
Low power, high speed, and on-board switches make
the ADS7845 ideal for battery-operated systems such
as personal digital assistants with resistive touch screens
and other portable equipment. The ADS7845 is avail-
able in a 16-lead SSOP package and is guaranteed
over the –40°C to +85°C temperature range.
UR
LR
Driver
GND
+VCC
UL
LL
AUX IN
WIPER
PENIRQ
+VCC GND
MUX
SAR
ADS7845
CDAC
Comparator
Serial
Data
Interface
and
Control
DOUT
BUSY
CS
DCLK
DIN
VREF
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1998 Burr-Brown Corporation
PDS-1497A
Printed in U.S.A. December, 1998
|
| |
 
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, +VCC = +2.7V, VREF = +2.5V, fSAMPLE = 125kHz, and fCLK = 16 • fSAMPLE = 2MHz, unless otherwise noted.
14
12
10
8
6
4
2
0
0
REFERENCE CURRENT vs SAMPLE RATE
25 50 75 100
Sample Rate (kHz)
125
REFERENCE CURRENT vs TEMPERATURE
18
16
14
12
10
8
6
–40
–20
0 20 40 60
Temperature (°C)
80 100
16
14
12
10
8
6
4
2
2
SWITCH ON RESISTANCE vs +VCC
(X+, Y+: +VCC to Pin; X–, Y–: Pin to GND)
LL LR
UL UR
2.5 3 3.5 4 4.5
+VCC (V)
5
SWITCH ON RESISTANCE vs TEMPERATURE
(X+, Y+: +VCC to Pin; X–, Y–: Pin to GND)
16
14
LR
12 LL
10
8
UR
6 UL
4
2
–40
–20
0 20 40 60
Temperature (°C)
80 100
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
20
MAXIMUM SAMPLING RATE vs RIN
INL: R = 2kΩ
INL: R = 500Ω
DNL: R = 2kΩ
DNL: R = 500Ω
40 60 80 100 120 140 160 180 200
Sampling Rate (kHz)
®
5 ADS7845
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADS7845E electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ADS7845E.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| ADS7845 | The function is TOUCH SCREEN CONTROLLER. Burr-Brown Corporation | |
| ADS7845 | The function is Touch Screen Controller. Texas Instruments |  |
| ADS7845E | The function is TOUCH SCREEN CONTROLLER. Burr-Brown Corporation | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
ADS7
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||