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參數(shù)資料
| 型號： | 935261327551 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | ADC |
| 英文描述： | DUAL 1-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP64 |
| 封裝： | PLASTIC, SOT-314-2, LQFP-64 |
| 文件頁數(shù)： | 12/26頁 |
| 文件大小： | 262K |
| 代理商： | 935261327551 |
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1999 Sep 16
2
Philips Semiconductors
Objective specication
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 Msps maximum sampling rate and 34 dBV DPGA
gain range optimizes the ADC for high dynamic range
applications.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VDDA
analog supply voltage
3.15
3.3
3.45
V
VDDD
digital supply voltage
3.0
3.3
3.6
V
VDDO
output stage supply voltage
2.7
3.3
3.6
V
IDDA
analog supply current
with DPGAEN LOW
106
mA
with DPGAEN HIGH
tbf
mA
IDDD
digital supply current
30
mA
IDDO
output stage supply current
3
mA
INL
DC integral non-linearity
from IC analog input to digital
output; ramp input;
fCLK = 100 MHz
with DPGA at G(min)
±3.0
tbf
LSB
without DPGA
±1.0
tbf
LSB
DNL
DC differential non-linearity
from IC analog input to digital
output; ramp input;
fCLK = 100 MHz
with DPGA at G(min)
±0.5
tbf
LSB
without DPGA
±0.5
tbf
LSB
Vn(o)(rms)
output referred noise (RMS value)
DPGA at G(max); Zi =50 ;
noise bandwidth = 15 MHz
tbf
2
mVrms
B(3dB)(ADC)
ADC
3 dB analogue bandwidth
at Vi(dif)(FS)
120
MHz
B(3dB)(DPGA) DPGA 3 dB bandwidth
at Vi(dif)(max)
30
tbf
MHz
f(sample)(max)
maximum sampling rate
100
Msps
Ptot
total power dissipation
with DPGAEN LOW
460
500
mW
with DPGAEN HIGH
tbf
mW
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