Audioaccess MA-361 Service, Руководство по обслуживанию

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ADS7846
4
SBAS125A
POWER SUPPLY REQUIREMENTS
+V
CC
(5) Specified Performance 2.7 3.6 V
Operating Range 2.2 5.25 V
Quiescent Current Internal Reference OFF 280 650
µ
A
Internal Reference ON 780
µ
A
f
SAMPLE
= 12.5kHz 220
µ
A
Shut Down Mode with 3
µ
A
DCLK = DIN = +V
CC
Power Dissipation +V
CC
= +2.7V 1.8 mW
TEMPERATURE RANGE
Specified Performance
–40 +85
°
C
NOTES: (1) LSB means Least Significant Bit. With V
REF
equal to +2.5V, one LSB is 610
µ
V. (2) Guaranteed by design, but not tested. Exceeding 50mA source current
may result in device degradation. (3) Difference between TEMP0 and TEMP1 measurement. No calibration necessary. (4) Temperature drift is –2.1mV/
°
C.
(5) ADS7846 will operate down to 2.2V.
ELECTRICAL CHARACTERISTICS
(Cont.)
ADS7846E
PARAMETER CONDITONS MIN TYP MAX UNITS
At T
A
=–40
°
C to +85
°
C, +V
CC
= +2.7V, V
REF
= 2.5V internal voltage, f
SAMPLE
= 125kHz, f
CLK
= 16 • f
SAMPLE
= 2MHz, 12-bit mode, and digital inputs = GND or
+V
CC
, unless otherwise noted.
PIN CONFIGURATION
Top View SSOP
PIN DESCRIPTION
PIN NAME DESCRIPTION
1 +V
CC
Power Supply
2 X+ X+ Position Input. ADC Input Channel 1.
3 Y+ Y+ Position Input. ADC Input Channel 2.
4 X– X– Position Input
5 Y– Y– Position Input
6 GND Ground
7 V
BAT
Battery Monitor Input
8 IN Auxiliary Input to ADC Input, Channel 4.
9 V
REF
Voltage Reference Input/Output
10 +V
CC
Power Supply
11 PENIRQ Pen Interrupt. Open anode output (requires 10k
Ω
to
100k
Ω
pull-up resistor externally).
12 DOUT Serial Data Output. Data is shifted on the falling
edge of DCLK. This output is high impedance when
CS is HIGH.
13 BUSY Busy Output. This output is high impedance when
CS is HIGH.
14 DIN Serial Data Input. If CS is LOW, data is latched on
rising edge of DCLK.
15 CS Chip Select Input. Controls conversion timing and
enables the serial input/output register. CS HIGH =
power-down mode (ADC only).
16 DCLK External Clock Input. This clock runs the SAR conver-
sion process and synchronizes serial data I/O.
1
2
3
4
5
6
7
8
+V
CC
X+
Y+
X–
Y–
GND
V
BAT
IN
DCLK
CS
DIN
BUSY
DOUT
PENIRQ
+V
CC
V
REF
16
15
14
13
12
11
10
9
ADS7846