Rainbow Electronics AT84AD004 - Manual (Page 20)

20
AT84AD004
5390A–BDC–06/04
Digital Output Coding (Nominal Settings)
Pin Description
Table 7. Digital Output Coding (Nominal Setting)
Differential
Analog Input
Voltage Level
Digital Output
I or Q (Binary Coding)
Out-of-range Bit
> 250 mV > Positive full-scale + 1/2 LSB 1 1 1 1 1 1 1 1 1
250 mV
248 mV
Positive full-scale + 1/2 LSB
Positive full-scale - 1/2 LSB
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 0 0
0
1 mV
-1 mV
Bipolar zero + 1/2 LSB
Bipolar zero - 1/2 LSB
1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1 0
0
-248 mV
-250 mV
Negative full-scale + 1/2 LSB
Negative full-scale - 1/2 LSB
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0
0
< -250 mV < Negative full-scale - 1/2 LSB 0 0 0 0 0 0 0 0 1
Table 8. AT84AD004 LQFP 144 Pin Description
Symbol Pin number Function
GNDA, GNDD, GNDO
10, 12, 22, 24, 36, 38, 40, 42, 44, 46, 51,
54, 59, 61, 63, 65, 67, 69, 85, 87, 97, 99,
109, 111, 130, 142, 144
Ground pins. To be connected to external
ground plane
V
CCA
41, 43, 45, 60, 62, 64 Analog positive supply: 3.3V typical
V
CCD
9, 21, 37, 39, 66, 68, 88, 100, 112, 123,
141
3.3V digital supply
V
CCO
11, 23, 86, 98, 110, 143
2.25V output and 3-wire serial interface
supply
V
INI
57, 58
In-phase (+) analog input signal of the
sample & hold differential preamplifier
channel I
V
INIB
55, 56
Inverted phase (-) of analog input signal
(V
INI
)
V
INQ
47, 48
In-phase (+) analog input signal of the
sample & hold differential preamplifier
channel Q
V
INQB
49, 50
Inverted phase (-) of analog input signal
(V
INQ
)
CLKI 124 In-phase (+) clock input signal
CLKIN 125
Inverted phase (-) clock input signal
(CLKI)
CLKQ 129 In-phase (+) clock input signal