Datasheet

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SBAS255C − JUNE 2004 − REVISED APRIL 2009
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5
PIN CONFIGURATIONS
Top View QFN
36
35
34
33
32
31
30
29
28
27
26
25
DIN
DIN
NC
NC
RESET
TEST
DGND
DGND
AGND
AVDD
AGND
AGND
DGND DGND CONV DGND DVALID DGND CLK DGND DCLK DCLK DGND DVDD
AGND AGND
AIN4
AGND
AIN3
AGND AGND AGND
AIN2
AGND
AIN1
AGND
1
2
3
4
5
6
7
8
9
10
11
12
DOUT
DOUT
CLK_4X
FORMAT
HISPD/LOPWR
RANGE0
RANGE1
RANGE2
AGND
VREF
AGND
AGND
48 47 46 45 44 43 42
41 40 39 38
13 14 15 16 17 18 19 20 21 22 23
37
24
DDC114
PIN DESCRIPTIONS
PIN NUMBER FUNCTION DESCRIPTION
DOUT 1 Digital Output Serial Data Output
DOUT 2 Digital Output Serial Data Output: Complementary Signal
CLK_4X 3 Digital Input Master Clock Divider Control: 0 = divide by 1, 1 = divide by 4
FORMAT 4 Digital Input Digital Output Word Format: 0 = 16 Bits, 1 = 20 Bits
HISPD/LOPWR 5 Digital Input Mode Control: 0 = Low-Power, 1 = High-Speed
RANGE0 6 Digital Input Range Control 0 (least significant bit)
RANGE1 7 Digital Input Range Control 1
RANGE2 8 Digital Input Range Control 2 (most significant bit)
AGND
9, 11-14, 16, 18-20,
22, 24-26, 28
Analog Analog Ground
VREF 10 Analog Input External Voltage Reference Input, 4.096V Nominal
AIN4 15 Analog Input Analog Input 4
AIN3 17 Analog Input Analog Input 3
AIN2 21 Analog Input Analog Input 2
AIN1 23 Analog Input Analog Input 1
AVDD 27 Analog Analog Power Supply, 5V Nominal
DGND
29, 30, 38, 41, 43, 45,
47, 48
Digital Digital Ground
TEST 31 Digital Input Test Mode Control
RESET 32 Digital Input Resets the Digital Circuitry, Active Low
NC 33, 34 — No Connection
DIN 35 Digital Input Serial Data Input: Complementary Signal (optional, see text on page 13)
DIN 36 Digital Input Serial Data Input
DVDD 37 Digital Digital Power Supply, 3V Nominal
DCLK 39 Digital Input Serial Data Clock Input: Complementary Signal (optional, see text on page 13)
DCLK 40 Digital Input Serial Data Clock Input
CLK 42 Digital Input Master Clock Input
DVALID 44 Digital Output Data Valid Output, Active Low
CONV 46 Digital Input Conversion Control Input: 0 = Integrate on Side B, 1 = Integrate on Side A