数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

ML2258 数据表(PDF) 7 Page - Micro Linear Corporation

部件名 ML2258
功能描述  關P Compatible 8-Bit A/D Converter with 8-Channel Multiplexer
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MICRO-LINEAR [Micro Linear Corporation]
网页  http://www.microlinear.com
标志 MICRO-LINEAR - Micro Linear Corporation

ML2258 数据表(HTML) 7 Page - Micro Linear Corporation

Back Button ML2258 Datasheet HTML 3Page - Micro Linear Corporation ML2258 Datasheet HTML 4Page - Micro Linear Corporation ML2258 Datasheet HTML 5Page - Micro Linear Corporation ML2258 Datasheet HTML 6Page - Micro Linear Corporation ML2258 Datasheet HTML 7Page - Micro Linear Corporation ML2258 Datasheet HTML 8Page - Micro Linear Corporation ML2258 Datasheet HTML 9Page - Micro Linear Corporation ML2258 Datasheet HTML 10Page - Micro Linear Corporation ML2258 Datasheet HTML 11Page - Micro Linear Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 12 page
background image
ML2258
7
1.0 FUNCTIONAL DESCRIPTION
1.1 MULTIPLEXER ADDRESSING
The ML2258 contains an 8-channel single ended analog
multiplexer. A particular input channel is selected by using
the address decoder. The relationship between the address
inputs, ADDR0–ADDR2, and the analog input selected is
shown in Table 1. The address inputs are latched into the
decoder on the rising edge of the address latch signal ALE.
SELECTED
ADDRESS INPUT
ANALOG CHANNEL
ADDR2
ADDR1
ADDR0
IN0
0
0
0
IN1
0
0
1
IN2
0
1
0
IN3
0
1
1
IN4
1
0
0
IN5
1
0
1
IN6
1
1
0
IN7
1
1
1
Table 1. Multiplexer Address Decoding
1.2 A/D CONVERTER
The A/D converter uses successive approximation to
perform the conversion. The converter is composed of the
successive approximation register, the DAC and the
comparator.
The DAC generates the precise levels that determine the
linearity and accuracy of the conversion. The DAC is
composed of a capacitor upper array and a resistor lower
array. The capacitor upper array generates the 4 MSB
decision levels while the series resistor lower array generates
the 4 LSB decision levels. A switch decoder tree is used to
decode the proper level from both arrays.
The capacitor/resistor array offers fast conversion, superior
linearity and accuracy since matching is only required
between 24 = 16 elements (as opposed to 28 = 256
elements in conventional designs). And since the levels are
based on the ratio of capacitors to capacitors and resistors to
resistors, the accuracy and long term stability of the
converter is improved. This also guarantees monotonicity
and no missing codes, as well as eliminating any linearity
temperature or power supply dependence.
The successive approximation register is a digital block used
to store the bit decisions from the conversion.
The comparator design is unique in that it is fully differential
and auto-zeroed. The fully differential architecture provides
excellent noise immunity, excellent power supply rejection,
and wide common mode range. The comparator is auto
zeroed at the start of each conversion in order to remove
any DC offset and full scale gain error, thus improving
accuracy and linearity.
Another advantage of the capacitor array approach used in
the ML2258 over conventional designs is the inherent
sample and hold function. This true S/H allows an accurate
conversion to be done on the input even if the analog signal
is not stable. Linearity and accuracy are maintained for
analog signals up to 1/2 the sampling frequency. As a result,
input signals up to 75kHz can be converted without
degradation in linearity or accuracy.
The sequence of events during a conversion is shown in
figure 5. The rising edge of a START pulse resets the internal
registers and the falling edge initiates a conversion on the
next rising edge of CLK. Four CLK pulses later, sampling of
the analog input begins. The input is then sampled for the
next four CLK periods until EOC goes low. EOC goes low on
the rising edge of the 8th CLK pulse indicating that the
conversion is now beginning. The actual conversion now
takes place for the next 56 CLK pulses, one bit for each 7
CLK pulses. After the conversion is done, the data is updated
on DB0–DB7 and EOC goes high on the rising edge of the
67th CLK pulse, indicating that the conversion has been
completed and data is valid on DB0–DB7. The data will stay
Figure 5. Timing Diagram
1/fCLK
tSS
tWS
tWALE
tH
tS
tH
tDIS
tEN
CLK
START
ALE
ADDR0–ADDR2
EOC
DB0–DB7
OE
12
4
35
6
7
8
66
67
68
69
70
PREVIOUS DATA
DATA
tC
tEOC


类似零件编号 - ML2258

制造商部件名数据表功能描述
logo
OKI electronic componet...
ML2250 OKI-ML2250 Datasheet
623Kb / 36P
   2-Channel Mixing Oki ADPCM Algorithm-Based Speech Synthesis LSI
ML2251-XXXGA OKI-ML2251-XXXGA Datasheet
623Kb / 36P
   2-Channel Mixing Oki ADPCM Algorithm-Based Speech Synthesis LSI
logo
Micro Linear Corporatio...
ML2252 MICRO-LINEAR-ML2252 Datasheet
202Kb / 13P
   關P Compatible 8-Bit A/D Converters with 2- or 8-Channel Multiplexer
logo
OKI electronic componet...
ML2252 OKI-ML2252 Datasheet
199Kb / 31P
   2-Channel Mixing Oki ADPCM Algorithm-Based Speech Synthesis LSI
ML2252-XXXGA OKI-ML2252-XXXGA Datasheet
623Kb / 36P
   2-Channel Mixing Oki ADPCM Algorithm-Based Speech Synthesis LSI
More results

类似说明 - ML2258

制造商部件名数据表功能描述
logo
Texas Instruments
ADC0809CCN TI1-ADC0809CCN Datasheet
494Kb / 19P
[Old version datasheet]   ADC0808/ADC0809 8-Bit 關P Compatible A/D Converters with 8-Channel Multiplexer
logo
Micro Linear Corporatio...
ML2252 MICRO-LINEAR-ML2252 Datasheet
202Kb / 13P
   關P Compatible 8-Bit A/D Converters with 2- or 8-Channel Multiplexer
logo
National Semiconductor ...
ADC0816 NSC-ADC0816_07 Datasheet
344Kb / 14P
   8-Bit 關P Compatible A/D Converters with 16-Channel Multiplexer
logo
Texas Instruments
ADC0808-N TI1-ADC0808-N_14 Datasheet
538Kb / 20P
[Old version datasheet]   ADC0808/ADC0809 8-Bit 關P Compatible A/D Converters with 8-Channel Multiplexer
logo
Maxim Integrated Produc...
MAX160 MAXIM-MAX160 Datasheet
462Kb / 12P
   關P Compatible 8 Bit A/D Converter
logo
Texas Instruments
ADC0844 TI1-ADC0844 Datasheet
2Mb / 24P
[Old version datasheet]   8-Bit 關P Compatible A/D Converters with Multiplexer Options
ADC0808-N TI1-ADC0808-N_17 Datasheet
533Kb / 19P
[Old version datasheet]   8-Bit Compatible A/D Converters with 8-Channel Multiplexer
logo
National Semiconductor ...
ADC0841 NSC-ADC0841 Datasheet
380Kb / 16P
   8-Bit P Compatible A/D Converter
ADC0808 NSC-ADC0808 Datasheet
264Kb / 14P
   8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer
ADC0808 NSC-ADC0808_07 Datasheet
394Kb / 16P
   8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com