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參數(shù)資料
| 型號： | MAX1200 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | +5v sINGLE-sUPPLY, 1mSPS, 16-bIT sELF-cALIBRATING adc |
| 中文描述： | +5V單電源、1Msps、16位自校準ADC |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 204K |
| 代理商： | MAX1200 |
M
+5V S ingle-S upply, 1Msps, 16-Bit
S elf-Calibrating ADC
12
______________________________________________________________________________________
Table 1. Two’s Complement Output Codes
S ignal-to-Noise
Plus Distortion (S INAD)
SINAD is the ratio of the fundamental input frequency’s
RMS amplitude to all other ADC output signals:
SINAD (dB) = 20log [Signal
RMS
/ (Noise +
Distortion)
RMS
]
Effec tive Number of Bits (ENOB)
ENOB indicates the global accuracy of an ADC at a
specific input frequency and sampling rate. An ideal
ADC’s error consists of quantization noise only. With an
input range equal to the full-scale range of the ADC, the
effective number of bits can be calculated as follows:
ENOB = (SINAD - 1.76) / 6.02
T otal Harmonic Distortion (T HD)
THD is the ratio of the RMS sum of the first nine har-
monics of the input signal to the fundamental itself. This
is expressed as:
where V
1
is the fundamental amplitude, and V
2
through
V
9
are the amplitudes of the 2nd through 9th-order har-
monics.
S purious-Free
Dynamic Range (S FDR)
SFDR is the ratio of RMS amplitude of the fundamental
(maximum signal component) to the RMS value of the
next largest spurious component, excluding DC offset.
Grounding and Power-S upply Dec oupling
Grounding and power-supply decoupling strongly influ-
ence the performance of the MAX1200. At 16-bit reso-
lution, unwanted digital crosstalk may couple through
the input, reference, power supply, and ground con-
nections; this adversely affects the SNR or SFDR. In
addition, electromagnetic interference (EMI) can either
couple into or be generated by the MAX1200.
Therefore, grounding and power-supply decoupling
guidelines should be closely followed.
First, a multilayer printed circuit board (PCB) with sepa-
rate ground and power-supply planes is recommend-
ed. Run high-speed signal traces directly above the
ground plane. Since the MAX1200 has separate analog
and digital ground buses (AGND and DGND respec-
tively), the PCB should also have separate analog and
digital ground sections connected at only one point
(star ground). Digital signals should run above the digi-
tal ground plane and analog signals should run above
the analog ground plane. Digital signals should be kept
far away from the sensitive analog inputs, reference
input senses, common-mode input, and clock input.
THD
20log
V
V
2
2
V
V
V
=
+
+
+ +
3
2
4
2
9
2
1
SCALE
OFFSET BINARY
ONE’S COMPLEMENT
TWO’S COMPLEMENT
+FSR - 1LSB
1111 .... 1111
0111 .... 1111
0111 .... 1111
+3/4FSR
1110 .... 0000
0110 .... 0000
0110 .... 0000
+1/2FSR
1100 .... 0000
0100 .... 0000
0100 .... 0000
+1/4FSR
1010 .... 0000
0010 .... 0000
0010 .... 0000
+0
1000 .... 0000
0000 .... 0000
0000 .... 0000
-0
—— .... ——
—— .... ——
1111 .... 1111
-1/4FSR
0110 .... 0000
1110 .... 0000
1101 .... 1111
-1/2FSR
0100 .... 0000
1100 .... 0000
1011 .... 1111
-3/4FSR
0010 .... 0000
1010 .... 0000
1001 .... 1111
-FSR +1LSB
0000 .... 0001
1000 .... 0001
1000 .... 0000
-FSR
0000 .... 0000
1000 .... 0000
—— .... ——
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| MAX12001ETB | 制造商:Maxim Integrated Products 功能描述: |
| MAX12001ETB+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX12001ETB+T | 功能描述:射頻放大器 1575MHz GPS LNA RoHS:否 制造商:Skyworks Solutions, Inc. 類型:Low Noise Amplifier 工作頻率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 輸出截獲點:37.5 dBm 功率增益類型:32 dB 噪聲系數(shù):0.85 dB 工作電源電壓:5 V 電源電流:125 mA 測試頻率:2.6 GHz 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
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