參數(shù)資料
型號： MAX1158AEUP
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： ADC
英文描述： 14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
中文描述： 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO20
封裝： 4.40 MM, TSSOP-20
文件頁數(shù)： 7/15頁
文件大?。?/td> 298K
代理商： MAX1158AEUP
Detailed Description
Converter Operation
The MAX1156/MAX1158/MAX1174 use a successive-
approximation (SAR) conversion technique with an
inherent track-and-hold (T/H) stage to convert an ana-
log input into a 14-bit digital output. Parallel outputs
provide a high-speed interface to microprocessors
(μPs). The
Functional Diagram
shows a simplified inter-
nal architecture of the MAX1156/MAX1158/MAX1174.
Figure 3 shows a typical application circuit for the
MAX1156/MAX1158/MAX1174.
Analog Input
Input Scaler
The MAX1156/MAX1158/MAX1174 have an input
scaler, which allows conversion of true bipolar input
voltages and input voltages greater than the power
supply, while operating from a single +5V analog sup-
ply. The input scaler attenuates and shifts the analog
input to match the input range of the internal DAC. The
MAX1156 has a unipolar input voltage range of 0 to
+10V. The MAX1158 input voltage range is ±10V while
the MAX1174 input voltage range is ±5V. Figure 4
shows the equivalent input circuit of the MAX1156/
MAX1158/MAX1174. This circuit limits the current going
into or out of AIN to less than 1.8mA.
Track and Hold (T/H)
In track mode, the internal hold capacitor acquires the
analog signal (see Figure 4). In hold mode, the T/H
switches open and the capacitive DAC samples the
analog input. During the acquisition, the analog input
(AIN) charges capacitor C
HOLD
. The acquisition ends
on the second falling edge of
CS
. At this instant, the
T/H switches open. The retained charge on C
HOLD
rep-
resents a sample of the input. In hold mode, the capac-
itive DAC adjusts during the remainder of the
conversion time to restore node T/H OUT to zero within
the limits of 14-bit resolution. Force
CS
low to put valid
data on the bus after conversion is complete.
M
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
7
Pin Description (continued)
PIN
NAME
FUNCTION
13
HBEN
High-Byte Enable Input. Used to multiplex the 14-bit conversion result.
1: Most significant byte available on the data bus.
0: Least significant byte available on the data bus.
14
CS
Convert Start. The first falling edge of
CS
powers up the device and enables acquire mode when R/
C
is low. The second falling edge of
CS
starts conversion. The third falling edge of
CS
loads the result
onto the bus when R/
C
is high.
15
16
17
18
19
20
DGND
DV
DD
D0/D8
D1/D9
D2/D10
D3/D11
Digital Ground
Digital Supply Voltage. Bypass with a 0.1μF capacitor to DGND.
Three-State Digital Data Output. D0 is the LSB.
Three-State Digital Data Output
Three-State Digital Data Output
Three-State Digital Data Output
DGND
1mA
C
LOAD
= 20pF
DO
–
D13
DO
–
D13
C
LOAD
= 20pF
1mA
DGND
DV
DD
a) HIGH-Z TO V
OH
,
V
OL
TO V
OH
, AND
V
OH
TO HIGH-Z
b) HIGH-Z TO V
,
V
OH
TO V
OL
, AND
V
OL
TO HIGH-Z
Figure 1. Load Circuits
相關PDF資料
PDF描述
MAX1158BCUP 14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1158BEUP 14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1156 Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-89 0 to 70
MAX1174BCUP 14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1174BEUP 14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
相關代理商/技術參數(shù)
參數(shù)描述
MAX1158AEUP+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1158AEUP+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1158AEUP-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 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1158BCUP 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 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1158BCUP+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
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