Pin description – Rainbow Electronics MAX1449 User Manual
Page 9

MAX1449
10-Bit, 105Msps, Single +3.3V, Low-Power
ADC with Internal Reference
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9
Pin Description
PIN
NAME
FUNCTION
1
REFN
Lower Reference. Conversion range is
±(V
REFP
- V
REFN
).
Bypass to GND with a > 0.1
µF capacitor.
2
COM
Common-Mode Voltage Output. Bypass to GND with a > 0.1
µF capacitor.
3, 9, 10
V
DD
Analog Supply Voltage. Bypass to GND with a capacitor combination of 2.2
µF in parallel with 0.1µF.
4, 5, 8, 11,
14, 30
GND
Analog Ground
6
IN+
Positive Analog Input. For single-ended operation connect signal source to IN+.
7
IN-
Negative Analog Input. For single-ended operation connect IN- to COM.
12
CLK
Conversion Clock Input
13
PD
Power Down Input.
High: Power-down mode
Low: Normal operation
15
OE
Output Enable Input.
High: Digital outputs disabled
Low: Digital outputs enabled
16–20
D9–D5
Three-State Digital Outputs D9–D5. D9 is the MSB.
21
OV
DD
Output Driver Supply Voltage. Bypass to GND with a capacitor combination of 2.2
µF in parallel with
0.1
µF.
22
T.P.
Test Point. Do not connect.
23
OGND
Output Driver Ground
24–28
D4–D0
Three-State Digital Outputs D4–D0. D0 is the LSB.
29
REFOUT
Internal Reference Voltage Output. May be connected to REFIN through a resistor or a resistor-
divider.
31
REFIN
Reference Input. V
REFIN
= 2
✕
(V
REFP
- V
REFN
). Bypass to GND with a > 0.1
µF capacitor.
32
REFP
Upper Reference. Conversion range is
±(V
REFP
- V
REFN
). Bypass to GND with a > 0.1
µF capacitor.