tda8768a NXP Semiconductors, tda8768a Datasheet - Page 12

• Manufacturer Part Number: tda8768a
• Description: 12-bit, 70 Msps Analog-to-digital Converter Adc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 09656
Product data
Fig 3. Timing diagram.
V l
DATA
D0 to D11
CLK
Table 7:
[1]
Table 8:
[1]
Table 9:
Code
Underflow
0
1
2047
4094
4095
Overflow
OTC
0
1
X
SH
1
0
[1]
Twos complement reference is inverted MSB.
X = don’t care.
DATA
N
sample N
Output coding with differential inputs (typical values to AGND);
V
Mode selection
Sample-and-hold selection
t CLKL
V
<3.125
3.125
3.6
4.075
>4.075
i(p-p)
2
i(p-p)
t
ds
t CLKH
V
Rev. 02 — 03 July 2002
i(p-p)
V
>4.075
4.075
3.6
3.125
<3.125
CE
0
0
1
Sample-and-hold
active
inactive; tracking mode
DATA
N
i(p-p)
sample N + 1
= 1.9 V, V
1
t d
IR
0
1
1
1
1
1
0
12-bit, 70 Msps Analog-to-Digital Converter (ADC)
ref
DATA
N
= V
t h
sample N + 2
CCA3
Binary outputs
D11 to D0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 1
0 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 0
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
D0 to D11 and IR
binary; active
twos complement; active
high-impedance
1.75 V
DATA
N
1
MBG855
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
50 %
50 %
HIGH
LOW
HIGH
LOW
TDA8768A
Twos complement
outputs
D11 to D0
1 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 1
1 1 1 1 1 1 1 1 1 1 1 1
0 1 1 1 1 1 1 1 1 1 1 0
0 1 1 1 1 1 1 1 1 1 1 1
0 1 1 1 1 1 1 1 1 1 1 1
[1]
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