TDA8798HL Philips Semiconductors, TDA8798HL Datasheet - Page 4

• Manufacturer Part Number: TDA8798HL
• Description: Dual 8-bit/ 100 Msps A/D converter with DPGA
• Manufacturer: Philips Semiconductors

Philips Semiconductors
PINNING
1999 Sep 16
handbook, full pagewidth
DPGA2N
DPGA2
DPGAC2
V
V
VIN2N
VIN2
V
V
VIN1
VIN1N
V
V
DPGAC1
DPGA1
DPGA1N
ref2
DDA2
SSA2
SSA1
DDA1
ref1
Dual 8-bit, 100 Msps A/D converter with
DPGA
External filtering may be used between DPGA and ADC to limit the noise bandwidth.
The external filter has a low-pass cut-off frequency of
and a high-pass cut-off frequency of
Other types of filter may be used if DC biasing is correct.
SYMBOL
I OUT
I OUT
PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
C o(DPGA)
C o(DPGA)
DPGA2 inverting output
DPGA2 non-inverting output
DPGA2 bandwidth limitation control
ADC2 reference output
DPGA2 analog supply voltage
DPGA2 inverting input voltage
DPGA2 non-inverting input voltage
DPGA2 analog ground
DPGA1 analog ground
DPGA1 non-inverting input voltage
DPGA1 inverting input voltage
DPGA1 analog supply voltage
ADC1 reference output
DPGA1 bandwidth limitation control
DPGA1 non-inverting output
DPGA1 inverting output
f
h 3dB
–
TDA8798
R o(DPGA)
R o(DPGA)
------ -
2
1
----------------------------- -
R
f
i ADC
l 3dB
–
1
DPGA
DPGAN
Fig.2 External filter.
C
------ -
2
1
.
(1)
(3)
R 2
------------------------------------------
10 H
10 H
L
L
+
4
R
L
o DPGA
100 nF
100 nF
R
1 k
C
C
DESCRIPTION
.
BUFN
BUF
(1) DPGA1/DPGA2
(2) BUF1/BUF2
(3) DPGA1N/DPGA2N
(4) BUF1N/BUF2N
(2)
(4)
R i(ADC)
R i(ADC)
TDA8798
C i(ADC)
C i(ADC)
FCE267
Objective specification
TDA8798