70
Analog-to-Digital Converters—New Products
ADS7861
Dual, 500kHz, 12-Bit, 2 + 2 Channel, Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
G
4 INPUT CHANNELS
G
FULLY DIFFERENTIAL INPUTS
G
2
μ
s TOTAL THROUGHPUT PER CHANNEL
G
GUARANTEED NO MISSING CODES
G
1MHz EFFECTIVE SAMPLING RATE
G
LOW POWER: 40mW
G
SSI SERIAL INTERFACE
SAR
Serial
Interface
COMP
CLOCK
A0
M1
M0
CONVST
CS
RD
BUSY
SERIAL DATA B
SERIAL DATA A
CDAC
Internal
2.5V
Reference
SHA
CH A0–
CH A0+
REF
IN
CH A1–
CH A1+
SAR
COMP
CDAC
SHA
CH B0–
CH B0+
CH B1–
CH B1+
REF
OUT
FEATURES
G
SAME PINOUT AS ADS7843
G
2.2V TO 5.25V OPERATION
G
INTERNAL 2.5V REFERENCE (Operates > 2.7V)
G
DIRECT BATTERY MEASUREMENT (0V to 6V)
G
ON-CHIP TEMPERATURE MEASUREMENT
G
TOUCH-PRESSURE MEASUREMENT
G
QSPI/SPI 3-WIRE INTERFACE
G
AUTO POWER DOWN
G
SSOP-16 PACKAGE
ADS7846
TOUCH-SCREEN CONTROLLER
CDAC
Internal 2.5V
Reference
SAR
ADS7846
Comparator
6-Channel
MUX
Serial
Data
Out
Temperature
Sensor
Battery
Monitor
DOUT
BUSY
CS
DCLK
DIN
V
BAT
AUX
V
REF
+V
CC
X+
X–
Y+
Y–
PENIRQ
D
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v
e
l
o
p
m
e
n
t
In
