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參數(shù)資料
| 型號： | MAX1011 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Power, 90Msps, 6-Bit ADC |
| 中文描述： | 低功耗、90Msps、6位ADC |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 111K |
| 代理商： | MAX1011 |
M
External Clock Operation
To accommodate designs that use an external clock,
the MAX1011’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 ENOB
performance. AC couple the clock source (recom-
mended voltage level is approximately 1Vp-p) to the
oscillator inputs (Figure 7).
Output Data Format
The conversion results are output on a 6-bit-wide data
bus. Data is latched into the ADC output latch following
a pipeline delay of one clock cycle (Figure 8). Output
data is clocked out of the ADC’s data output pins (D0
through D5) on the rising edge of the clock output
(DCLK), with a DCLK-to-data propagation delay (t
PD
) of
3.0ns. The MAX1011 outputs are +3.3V CMOS-logic
compatible.
T ransfer Func tion
Figure 9 shows the MAX1011’s nominal transfer function.
Output coding is offset binary with 1LSB = FSR / 63.
___________Applic ations Information
The MAX1011 is designed with separate analog and
digital power-supply and ground connections to isolate
high-current digital noise spikes from the more sensi-
tive analog circuitry. The high-current digital output
ground (OGND) and analog ground (GND) should be
at the same DC level, connected at only one location
on the board. This will provide best noise immunity and
improved conversion accuracy. Use of separate
ground planes is strongly recommended.
The entire board needs good DC bypassing for both
analog and digital supplies. Place the power-supply
bypass capacitors close to where the power is routed
onto the board, i.e., close to the connector. 10μF elec-
trolytic capacitors with low-ESR ratings are recom-
mended. For best effective bits performance, minimize
capacitive loading at the digital outputs. Keep the digi-
tal output traces as short as possible.
The MAX1011 requires a +5V ±5% power supply for
the analog supply (V
CC
) and a +3.3V ±300mV power
supply connected to V
CCO
for the logic outputs.
Bypass each of the V
CC
supply pins to its respective
GND with high-quality ceramic capacitors located as
close to the package as possible (Table 2). Consult the
evaluation kit manual for a suggested layout and
bypassing scheme.
Low-Power, 90Msps, 6-Bit ADC
8
_______________________________________________________________________________________
Figure 7. External Clock Drive Circuit
MAX1011
CLK
DRIVER
TNK-
V
CLK
V
CLK
= 300mV
p-p
TO1.25V
p-p
TNK+
50
50
Z
0
= 50
50
0.1
μ
F
0.1
μ
F
0.01μF
0.01μF
Oscillator/Clock
Converter
47pF
Digital Output
9
16
13
BYPASS
TO GND/
OGND
(PIN)
10
6
17
14
V
CC
/
V
CCO
(PIN)
11
SUPPLY
FUNCTION
0.01μF
Analog Inputs
CAPACITOR
VALUE
Table 2. Bypassing Guide
Figure 6. Tank Resonator Oscillator
MAX1011
CLK
DRIVER
VARACTOR DIODE PAIR IS M/A-COM MA4ST079CK-287
(SOT23 PACKAGE)
INDUCTOR COILCRAFT 1008HS-221.
V
TUNE
= 0V TO8V
f
OSC
= 70MHz TO109MHz
TNK-
TNK+
V
TUNE
220nH
5pF
47pF
47pF
47k
47k
10k
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|---|---|
| MAX1011CEG | 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 |
| MAX1011CEG+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 90Msps 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 |
| MAX1011CEG+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 90Msps 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 |
| MAX1011CEG-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 |
| MAX1011EVKIT | 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 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
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