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參數(shù)資料
| 型號(hào)： | MAX1002 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Power, 60Msps, Dual, 6-Bit ADC |
| 中文描述： | 低功耗、60Msps、雙路、6位ADC |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大小： | 106K |
| 代理商： | MAX1002 |
M
The MAX1002 features a proprietary encoding scheme
that ensures no more than 1LSB dynamic encoding
error. Dynamic encoding errors resulting from meta-
stable states may occur when the analog input voltage,
at the time the sample is taken, falls close to the deci-
sion point for any one of the input comparators. The
resulting output code for typical converters can be
incorrect, including false full- or zero-scale outputs. The
MAX1002’s unique design reduces the magnitude of
this type of error to 1LSB.
Internal V oltage Referenc e
An internal buffered bandgap reference is included on
the MAX1002 to drive the ADC’s reference ladders. The
on-chip reference and buffer eliminate any external
(high-impedance) connections to the reference ladder,
minimizing the potential for noise coupling from exter-
nal circuitry while ensuring that the voltage reference,
input amplifier, and reference ladder track well with
variations in temperature and power supplies.
Osc illator Circ uit
The MAX1002 includes a differential oscillator, which is
controlled by an external parallel resonant (tank) net-
work (Figure 6). As an alternative, the oscillator may be
overdriven with an external clock source (Figure 7).
Internal-Cloc k Operation (T ank)
If the tank circuit is used, the resonant inductor should
have a sufficiently high Q and a self-resonant frequen-
cy (SRF) of at least twice the intended oscillator fre-
quency. Coilcraft's 1008HS-221, with a 700MHz SRF
and a Q of 45, works well for this application. Generate
different clock-frequency ranges by adjusting varactor
and tank elements.
An internal-clock-driver buffer is included to provide
sharp clock edges to the internal flash comparators.
The buffer ensures that the comparators are simultane-
ously clocked, maximizing the ADC’s effective number
of bits of performance.
External-Cloc k Operation
To accommodate designs that use an external clock,
the MAX1002’s internal oscillator can be overdriven by
an external clock source (Figure 7). The external clock
source should be a sinusoid to minimize clock-phase
noise and jitter, which can degrade the ADC’s effective
bits performance. AC couple the clock source (recom-
mended voltage level is approximately 1Vp-p) to the
oscillator inputs (Figure 7).
Low-Power, 60Msps, Dual, 6-Bit ADC
8
_______________________________________________________________________________________
Figure 6. Tank-Resonator Oscillator
Figure 7. External-Clock-Drive Circuit
MAX1002
CL0CK
DRIVER
VARACTOR DIODE PAIR IS M/A-COM MA4ST079CK-287 (SOT23 PACKAGE).
INDUCTOR IS COILCRAFT 1008HS-221.
V
TUNE
= 0V TO8V
f
OSC
= 55MHz TO65MHz
TNK-
TNK+
V
TUNE
220nH
22pF
47pF
47pF
47k
47k
10k
MAX1002
CLOCK
DRIVER
TNK-
V
C
V
CLOCK
= 300mVp-p TO1.25Vp-p
TNK+
50
50
Z
0
= 50
50
0.1
μ
F
0.1
μ
F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1002CAX | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1002CAX+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 60Msps Dual 6-Bit RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1002CAX+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 60Msps Dual 6-Bit RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1002CAX-T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1002EVKIT | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
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