TDA8768A Datasheet, PDF (17/32 Pages) NXP Semiconductors – 12-bit, 70 Msps Analog-to-Digital Converter (ADC)

Philips Semiconductors
TDA8768A
12-bit, 70 Msps Analog-to-Digital Converter (ADC)
80
SFDR
(dBFS)
70
005aaa020
60
50
(2)
40
(1)
30
(3)
20
-60
-50
-40
-30
-20
-10
0
Vi (dBFS)
(1) f_i = 4.43 MHz
(2) f_i = 20 MHz
(3) SFDR = 80 dB
Fig 14. Spurious free dynamic range (SFDR) as a function of input amplitude; FSREF = 1.9 V; f_CLK = 55 MHz.
72
70
(3)
(dB)
68
(2)
005aaa021
11
10.5
bits
10
66
9.5
64
9
(1)
62
8.5
60
1.3 1.4 1.5 1.6 1.7 1.8 1.9
8
2 2.1 2.2
Vref (V)
(1) = SNR
(2) = ENOB
(3) = SFDR
Fig 15. ENOB, SFDR and SNR as a function of V_ref;
f_CLK = 55 MHz; f_i = 4.43 MHz.
2.6
005aaa022
2.4
(Vi - Vi)(p-p)
(V) _2.2
2
1.8
1.6
1.4
1.2
1
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2
VCCA - Vref (V)
Fig 16. ADC full-scale; V_I(p-p) − V_I(p-p) as a function of
V_CCA − V_ref.
9397 750 09656
Product data
Rev. 02 — 03 July 2002
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
17 of 32