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參數(shù)資料
| 型號： | TDA8798 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Dual 8-bit, 100 Msps A/D converter with DPGA |
| 中文描述： | 雙8位，100 Msps的的A / D轉(zhuǎn)換器與DPGA |
| 文件頁數(shù)： | 2/24頁 |
| 文件大小： | 214K |
| 代理商： | TDA8798 |
1999 Sep 16
2
Philips Semiconductors
Objective specification
Dual 8-bit, 100 Msps A/D converter with
DPGA
TDA8798
FEATURES
Dual 8-bit Analog-to-Digital Converter (ADC)
Sampling rate up to 100 million samples per
second (Msps)
Dual 34 dBV 6-bit Digitally Programmable Gain
Amplifier (DPGA) with optional power-off
Optional external equalization filter with capacitive
coupling between DPGA and ADC
Serial Interface (SI) for DPGA gain control using either
parallel load mode or count-up/count-down mode
3.3 V TTL/CMOS compatible I/O
Differential or single-ended TTL/CMOS clock interface
AC or DC coupling for DPGA inputs.
APPLICATIONS
High-dynamic range acquisition front-ends
Digital data storage read channels.
GENERAL DESCRIPTION
The TDA8798 is a dual 8-bit ADC with DPGA.
The 100 Mspsmaximumsamplingrateand34 dBVDPGA
gain range optimizes the ADC for high dynamic range
applications.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
DDA
V
DDD
V
DDO
I
DDA
analog supply voltage
digital supply voltage
output stage supply voltage
analog supply current
3.15
3.0
2.7
3.3
3.3
3.3
106
tbf
30
3
3.45
3.6
3.6
V
V
V
mA
mA
mA
mA
with DPGAEN LOW
with DPGAEN HIGH
I
DDD
I
DDO
INL
digital supply current
output stage supply current
DC integral non-linearity
from IC analog input to digital
output; ramp input;
f
CLK
= 100 MHz
with DPGA at G
(min)
without DPGA
from IC analog input to digital
output; ramp input;
f
CLK
= 100 MHz
with DPGA at G
(min)
without DPGA
DPGA at G
(max)
; Z
i
= 50
;
noise bandwidth = 15 MHz
at V
i(dif)(FS)
at V
i(dif)(max)
±
3.0
±
1.0
tbf
tbf
LSB
LSB
DNL
DC differential non-linearity
±
0.5
±
0.5
tbf
tbf
tbf
2
LSB
LSB
mV
rms
V
n(o)(rms)
output referred noise (RMS value)
B
(
3dB)(ADC)
B
(
3dB)(DPGA)
DPGA
3 dB bandwidth
f
(sample)(max)
maximum sampling rate
P
tot
total power dissipation
ADC
3 dB analogue bandwidth
30
100
120
tbf
460
tbf
500
tbf
MHz
MHz
Msps
mW
mW
with DPGAEN LOW
with DPGAEN HIGH
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