TDA8706 Datasheet, PDF (8/16 Pages) NXP Semiconductors – 6-bit analog-to-digital converter with multiplexer and clamp

Philips Semiconductors
6-bit analog-to-digital converter with
multiplexer and clamp
Preliminary specification
TDA8706
Notes to the characteristics
1. Low frequency ramp signal (V_VI(p-p) = 1.8 V and f_i = 15 kHz) combined with a sinewave input voltage (V_VI(p-p) = 0.5 V
and f_i = 4.43 MHz) at the input.
2. Supply voltage ripple rejection (SVRR): variation of the input voltage produces output code 31 for a supply voltage
variation of 1 V.
SVRR = 20 log^∆---_∆--V--V--^V--_C-ⁱ--⁽-_C-³--_A-¹--⁾-
3. Full-scale sinewave; f_i = 4.43 MHz, f_CLK = 20 MHz.
Table 1 Output coding
STEP
Underflow
0
1
.
.
.
62
63
Overflow
VI⁽¹⁾
(TYP. VALUE)
<2.2 V
2.2 V
2.215 V
3.072 V
3.086 V
>3.1 V
Note
1. With clamping capacitance.
BINARY
OUTPUTS
D5 TO D0
000000
000000
000001
......
......
......
111110
111111
111111
Table 3 Clamp input A
A
CLAMP
0
1
1
1
Note
1. X = don’t care.
DIGITAL
OUTPUTS
X⁽¹⁾
0
V_inA
2.2
2.2
Table 4 Clamp input B and C
B/C
CLAMP
DIGITAL
OUTPUTS
0
1
X⁽¹⁾
1
1
32
Note
1. X = don’t care.
V_inB/V_inC
2.65
2.65
Table 2 Mode selection
CEN
1
0
D0 TO D5
high impedance
active; binary
1996 Aug 20
8