MAX1227_12 Datasheet, PDF (8/22 Pages) Maxim Integrated Products – 12-Bit 300ksps ADCs with FIFO,Temp Sensor, Internal Reference

12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
Pin Description
PIN
MAX1231
TQFN-EP
MAX1231
QSOP
MAX1229
MAX1227
NAME
FUNCTION
2–12, 26,
27, 28,
—
—
1–14
—
—
—
1–10
—
—
AIN0–13 Analog Inputs
—
AIN0–9 Analog Inputs
1–6
AIN0–5 Analog Inputs
13
15
—
—
REF-/AIN14 ^{Negative Input for External Differential Reference/Analog Input 14.}
See Table 3 for details on programming the setup register.
—
—
11
—
REF-/AIN10 ^{Negative Input for External Differential Reference/Analog Input 10.}
See Table 3 for details on programming the setup register.
—
—
—
7
REF-/AIN6
Negative Input for External Differential Reference/Analog Input 6.
See Table 3 for details on programming the setup register.
14
16
—
—
CNVST/
AIN15
Active-Low Conversion Start Input/Analog Input 15. See Table 3 for
details on programming the setup register.
—
—
12
—
CNVST/
AIN11
Active-Low Conversion Start Input/Analog Input 11. See Table 3 for
details on programming the setup register.
—
—
—
8
CNVST/ Active-Low Conversion Start Input/Analog Input 7. See Table 3 for
AIN7 details on programming the setup register.
15
17
13
9
REF+ Positive Reference Input. Bypass to GND with a 0.1µF capacitor.
16
18
14
10
GND Ground
18
19
15
11
V_DD
Power Input. Bypass to GND with a 0.1µF capacitor.
Serial Clock Input. Clocks data in and out of the serial interface.
20
20
16
12
SCLK (Duty cycle must be 40% to 60%.) See Table 3 for details on
programming the clock mode.
21
21
17
13
CS
Active-Low Chip Select Input. When CS is low, the serial interface
is enabled. When CS is high, DOUT is high impedance.
22
22
18
14
DIN
Serial Data Input. DIN data is latched into the serial interface on the
rising edge of SCLK.
23
23
19
15
DOUT
Serial Data Output. Data is clocked out on the falling edge of
SCLK. High impedance when CS is connected to V_DD.
24
24
20
16
EOC
End of Conversion Output. Data is valid after EOC pulls low.
1, 17, 19,
25
—
—
—
N.C.
No Connection. Not internally connected.
—
—
—
—
EP
Exposed Pad (TQFN Only). Connect to GND.
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