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參數(shù)資料
| 型號： | MAX116CAX |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 2x4-Channel, Simultaneous-Sampling 12-Bit ADCs |
| 中文描述： | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO36 |
| 封裝： | 0.300 INCH, 0.80 MM PITCH, SSOP-36 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大小： | 215K |
| 代理商： | MAX116CAX |
Track/Holds
The MAX115/MAX116 feature four simultaneous T/Hs.
Each T/H has two multiplexed inputs. A T-switch input
configuration provides excellent hold-mode isolation.
Allow 600ns acquisition time for 12-bit accuracy.
The T/H aperture delay is typically 10ns. The 500ps
aperture-delay mismatch between the T/Hs allows the
relative phase information of up to four different inputs
to be preserved. Figure 3 shows the equivalent input
circuit, illustrating the ADC’s sampling architecture.
Only one of four T/H stages with its two multiplexed
inputs (CH_A and CH_B) is shown. All switches are in
track configuration for channel A. An internal buffer
charges the hold capacitor to minimize the required
acquisition time between conversions. The analog input
appears as a 10k
resistor in parallel with a 16pF
capacitor for the MAX115 and as a 1M
resistor in par-
allel with a 16pF capacitor for the MAX116.
Between conversions, the buffer input is connected to
channel 1 of the selected track/hold bank. When a
channel is not selected, switches S1, S2, and S3 are
placed in hold mode to improve channel-to-channel
isolation.
Digital Interface
Input data (A0–A3) and output data (D0–D11) are multi-
plexed on a three-state bidirectional interface. This par-
allel I/O can easily be interfaced with a microprocessor
(μP) or DSP.
CS
,
WR
, and
RD
control the write and read
operations.
CS
is the standard chip-select signal, which
enables the controller to address the MAX115/MAX116
as an I/O port. When
CS
is high, it disables the
WR
and
RD
inputs and forces the interface into a high-Z state.
Figure 4 details the interface timing.
Programming Modes
The MAX115/MAX116 have eight conversion modes
plus power-down, which are programmed through a
bidirectional parallel interface. At power-up, the devices
default to the Input Mux A/Single-Channel Conversion
mode. The user can select between two banks (mux
inputs A or mux inputs B) of four simultaneous-sampled
input channels, as illustrated in Figure 2. An internal
microsequencer can be programmed to convert one to
four channels of the selected bank per sample. For a
single-channel conversion, CH1 is digitized, and then
INT
goes low to indicate completion of the conversion.
M
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
_______________________________________________________________________________________
9
CH1
CH2
CH3
CH4
t
ACQ
t
CONV
t
AH
t
AS
t
WR
t
CWH
t
DH
t
DA
t
RD
t
CRS
t
CRH
t
RD
t
ID
t
CWS
CONVST
INT
CS
WR
DATA
t
CW
DATA IN
RD
Figure 4. Timing Diagram
Figure 5. Programming a Four-Channel Conversion, Input Mux A
A0
(LSB)
WR
CS
A1
A2
A3
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| MAX116EAX | 2x4-Channel, Simultaneous-Sampling 12-Bit ADCs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX116CAX+T | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX116CAX-T | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX116EAX | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX116EAX+T | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX116EAX-T | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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