參數(shù)資料
型號(hào)： TDA8798HL
廠商： NXP SEMICONDUCTORS
元件分類： ADC
英文描述： Dual 8-bit, 100 Msps A/D converter with DPGA
中文描述： DUAL 1-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁(yè)數(shù)： 17/24頁(yè)
文件大小： 195K
代理商： TDA8798HL
1999 Sep 16
17
Philips Semiconductors
Objective specification
Dual 8-bit, 100 Msps A/D converter with
DPGA
TDA8798
TEST AND APPLICATION INFORMATION
Fig.7 Application diagram.
handbook, full pagewidth
100 nF
(1)
TDA8798HL
MGM867
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
3.3 V
3.3 V
3.3 V
B7
B6
B5
B4
B3
B2
B1
B0
A0
A1
A2
A3
A4
A5
A6
A7
B7
B6
B5
B4
B3
B2
B1
B0
A0
A1
A2
A3
A4
A5
A6
A7
DPGA2N
DPGA2
DPGAC2
Vref2
Vref1
VDDA2
VIN2N
VIN2
VIN2N
VIN2
VSSA2
VSSA1
VIN1
VIN1N
VIN1
VIN1N
VDDA1
DPGAC1
DPGA1
DPGA1N
1
1
1
2
2
2
2
2
2
2
2
2
2
3
3
3
6
6
6
6
6
5
5
5
5
5
5
5
5
5
5
4
B
B
V
V
V
C
C
C
V
V
S
V
V
B
B
V
V
V
C
C
C
V
V
S
S
S
S
S
S
S
S
S
S
V
V
VSSO
VSSO
VSSD
VSSD
VSSA
VSSA
T
O
T
O
VSSD
VSSO
VSSD
VSSA
S
T
VSSD
D
D
100 nF
(1)
3.3 V
VSSO
100 nF
(1)
3.3 V
VSSD
100 nF
(1)
3.3 V
VSSA
100 nF
(1)
100 nF
(1)
100 nF
(2)
68 pF
(3)
68 pF
(3)
100 nF
(4)
100 nF
(2)
100 nF
(2)
100 nF
(2)
100 nF
100 nF
100 nF
(4)
100 nF
(4)
100 nF
(4)
3.3 V
VSSA
VSSA
100 nF
(1)
3.3 V
VSSA
VSSA
100 nF
(1)
VSSD
Analog and digital supplies must be separate and decoupled.
(1) Supply decoupling capacitor must be placed as close as possible to the chip’s pin. Value may need changing depending on the external filter
characteristics.
(2) Capacitor may be replaced when an external filter is used with AC coupling.
(3) Capacitor value may be changed to adjust settling time between DPGA gain changes.
(4) Capacitor value may need changing depending on the high-pass cut-off frequency of the external filter.
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