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參數(shù)資料
| 型號： | MAX1108 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs |
| 中文描述： | 單電源、低功耗、2通道、串行8位ADC |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 185K |
| 代理商： | MAX1108 |
M
S ingle-S upply, Low-Power,
2-Channel, S erial 8-Bit ADCs
10
______________________________________________________________________________________
_______________Detailed Desc ription
The MAX1108/MAX1109 analog-to-digital converters
(ADCs) use a successive-approximation conversion
technique and input track/hold (T/H) circuitry to convert
an analog signal to an 8-bit digital output. A flexible
serial interface provides easy interface to microproces-
sors (μPs). No external hold capacitors are required. All
of the MAX1108/MAX1109 operating modes are soft-
ware-configurable: internal or external reference, inter-
nal or external conversion clock, single-ended unipolar
or pseudo-differential unipolar/bipolar conversion, and
power down (Table 1).
Analog Inputs
Track/Hold
The input architecture of the ADCs is illustrated in the
equivalent-input circuit of Figure 4 and is composed of
the T/H, the input multiplexer, the input comparator, the
switched capacitor DAC, the reference, and the auto-
zero rail.
The analog-inputs configuration is determined by the
control-byte through the serial interface as shown in
Table 2 (see Modes of Operation section and Table 1).
The eight modes of operation include single-ended,
pseudo-differential, unipolar/bipolar, and a V
DD
moni-
toring mode. During acquisition and conversion, only
one of the switches in Figure 4 is closed at any time.
The T/H enters its tracking mode on the falling clock
edge after bit 4 (SEL0) of the control byte has been
shifted in. It enters its hold mode on the falling edge
after the bit 2 (I/EREF) of the control byte has been
shifted in.
For example, If CH0 and COM are chosen (SEL2 =
SEL1 = SEL0 = 1) for conversion, CH0 is defined as the
sampled input (SI), and COM is defined as the refer-
ence input (RI). During acquisition mode, the CH0
switch and the T/H switch are closed, charging the
V
DD
3k
C
LOAD
DGND
DOUT
C
LOAD
DGND
3k
DOUT
a)
High-Z to V
OH
and V
OL
to V
OH
b)
High-Z to V
OL
and V
OH
to V
OL
Figure 1. Load Circuits for Enable Time
V
DD
3k
C
LOAD
DGND
DOUT
C
LOAD
DGND
3k
DOUT
a)
V
OH
to High-Z
b)
V
OL
to High-Z
Figure 2. Load Circuits for Disable Time
V
DD
I/O
SCK (SK)
MOSI (SO)
MISO(SI)
V
SS
DOUT
DIN
SCLK
CS
COM
GND
V
DD
CH1
1
μ
F
0.1
μ
F
1
μ
F
CH0
ANALOG
INPUTS
MAX1108
MAX1109
CPU
V
DD
REF
Figure 3. Typical Operating Circuit
CH0
COM
V
DD
/ 2
GND
CH1
REF
GND
C
HOLD
CAPACITIVE DAC
COMPARATOR
18pF
R
IN
6.5k
AUTOZERO
RAIL
TRACK
HOLD
Figure 4. Equivalent Input Circuit
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1108_03 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs |
| MAX11080 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:12-Channel, High-Voltage Battery-Pack Fault Monitor |
| MAX11080EVKIT | 功能描述:電源管理IC開發(fā)工具 Programmers, Development Systems Eval and Demo Boards and Kits - KIT FAULT MONITOR 12CH HV RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX11080EVKIT+ | 功能描述:電源管理IC開發(fā)工具 Programmers, Development Systems Eval and Demo Boards and Kits - KIT FAULT MONITOR 12CH HV RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX11080GUU/V+ | 功能描述:電池管理 12 Ch Hi Volt Batt Pack Fault Monitor RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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