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參數(shù)資料
| 型號： | MAX1038AEEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | LJT 4C 4#16 SKT RECP |
| 中文描述： | 12-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封裝： | 0.150 INCH, MO-137, QSOP-16 |
| 文件頁數(shù)： | 8/22頁 |
| 文件大?。?/td> | 427K |
| 代理商： | MAX1038AEEE |
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Detailed Description
The MAX1036
–
MAX1039 ADCs use successive-
approximation conversion techniques and input T/H cir-
cuitry to capture and convert an analog signal to a
serial 8-bit digital output. The MAX1036/MAX1037 are
4-channel ADCs, and the MAX1038/MAX1039 are 12-
channel ADCs. These devices feature a high-speed 2-
wire serial interface supporting data rates up to
1.7MHz. Figure 3 shows the simplified functional dia-
gram for the MAX1038/MAX1039.
Power Supply
The MAX1036
–
MAX1039 operate from a single supply
and consume 350μA at sampling rates up to 188ksps.
The MAX1037/MAX1039 feature a 2.048V internal
reference and the MAX1036/MAX1038 feature a 4.096V
internal reference. All devices can be configured for
use with an external reference from 1V to V
DD
.
Analog Input and Track/Hold
The MAX1036
–
MAX1039 analog input architecture con-
tains an analog input multiplexer (MUX), a T/H capaci-
tor, T/H switches, a comparator, and a switched
capacitor digital-to-analog converter (DAC) (Figure 4).
In single-ended mode, the analog input multiplexer con-
nects C
T/H
to the analog input selected by CS[3:0] (see
the
Configuration/Setup Bytes (Write Cycle)
section). The
charge on C
T/H
is referenced to GND when converted. In
pseudo-differential mode, the analog input multiplexer
connects C
T/H
to the
‘
+
’
analog input selected by
CS[3:0]. The charge on C
T/H
is referenced to the
‘
-
’
ana-
log input when converted.
The MAX1036
–
MAX1039 input configuration is pseudo-
differential in that only the signal at the
‘
+
’
analog input
is sampled with the T/H circuitry. The
‘
-
’
analog input
signal must remain stable within ±0.5LSB (±0.1LSB for
best results) with respect to GND during a conversion.
To accomplish this, connect a 0.1μF capacitor from
‘
-
’
analog input to GND. See the
Single-Ended/Pseudo-
Differential Input
section.
During the acquisition interval, the T/H switches are in
the track position and C
T/H
charges to the analog input
signal. At the end of the acquisition interval, the T/H
switches move to the hold position retaining the charge
on C
T/H
as a sample of the input signal.
During the conversion interval, the switched capacitive
DAC adjusts to restore the comparator input voltage to
zero within the limits of 8-bit resolution. This action
requires eight conversion clock cycles and is equiva-
lent to transferring a charge of 18pF
(V
IN
+ - V
IN
-)
from C
T/H
to the binary weighted capacitive DAC form-
ing a digital representation of the analog input signal.
Sufficiently low source impedance is required to ensure
an accurate sample. A source impedance below 1.5k
does not significantly degrade sampling accuracy. To
minimize sampling errors with higher source imped-
ances, connect a 100pF capacitor from the analog
input to GND. This input capacitor forms an RC filter
with the source impedance limiting the analog input
bandwidth. For larger source impedances, use a buffer
amplifier to maintain analog input signal integrity.
When operating in internal clock mode, the T/H circuitry
enters its tracking mode on the ninth falling clock edge
2.7V to 5.5V, Low-Power, 4-/12-Channel
2-Wire Serial 8-Bit ADCs
8
_______________________________________________________________________________________
PIN
MAX1036/
MAX1037
MAX1038/
MAX1039
NAME
FUNCTION
1, 2, 3
—
—
8, 7, 6
5, 4, 3, 2, 1
16, 15, 14
AIN0
–
AIN2
AIN3
–
AIN7
AIN8
–
AIN10
Analog Inputs
4
—
AIN3/REF
Analog Input 3/Reference Input or Output. Selected in the setup
register.
—
13
AIN11/REF
Analog Input 11/Reference Input or Output. Selected in the setup
register.
5
6
7
8
9
10
11
12
SCL
SDA
GND
V
DD
Clock Input
Data Input/Output
Ground
Positive Supply. Bypass to GND with a 0.1μF capacitor.
Pin Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1039AEEE | LJT 8C 8#20 PIN RECP |
| MAX1036 | 2.7V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs |
| MAX1038 | 2.7V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs |
| MAX1039 | 2.7V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs |
| MAX1036EKA- | 2.7V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1038AEEE+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 5V 12-Bit 4Ch I2C Serial 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1038AEEE+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 5V 12-Bit 4Ch I2C Serial 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1038AEEE-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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1038EVKIT | 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 |
| MAX1038KAEEE | 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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