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| 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： | 11/22頁 |
| 文件大?。?/td> | 427K |
| 代理商： | MAX1038AEEE |
Single-Ended/Pseudo-Differential Input
The SGL/
DIF
bit of the configuration byte configures the
MAX1036
–
MAX1039 analog input circuitry for single-
ended or pseudo-differential inputs (Table 2). In single-
ended mode (SGL/
DIF
= 1), the digital conversion results
are the difference between the analog input selected by
CS[3:0] and GND (Table 3). In pseudo-differential mode
(SGL/
DIF
= 0), the digital conversion results are the differ-
ence between the
‘
+
’
and the
‘
-
’
analog inputs selected
by CS[3:0] (Table 4). The
‘
-
’
analog input signal must
remain stable within ±0.5LSB (±0.1LSB for best results)
with respect to GND during a conversion.
Unipolar/Bipolar
When operating in pseudo-differential mode, the BIP/
UNI
bit of the setup byte (Table 1) selects unipolar or
bipolar operation.Unipolar mode sets the differential
analog input range from zero to V
REF
. A negative differ-
ential analog input in unipolar mode causes the digital
output code to be zero. Selecting bipolar mode sets the
differential input range to ±V
REF
/2, with respect to the
negative input. The digital output code is binary in
unipolar mode and two
’
s complement binary in bipolar
mode (see the
Transfer Functions
section).
In single-ended mode, the MAX1036
–
MAX1039 always
operate in unipolar mode regardless of the BIP/
UNI
setting, and the analog inputs are internally referenced
to GND with a full-scale input range from zero to V
REF
.
Digital Interface
The MAX1036
–
MAX1039 feature a 2-wire interface con-
sisting of a serial data line (SDA) and a serial clock line
(SCL). SDA and SCL facilitate bidirectional communica-
tion between the MAX1036
–
MAX1039 and the master
at rates up to 1.7MHz. The MAX1036
–
MAX1039 are
slaves that transmit and receive data. The master (typi-
cally a microcontroller) initiates data transfer on the bus
and generates SCL to permit that transfer.
SDA and SCL must be pulled high. This is typically
done with pullup resistors (500
or greater) (see
Typical Operating Circuit
). Series resistors (R
S
) are
optional. They protect the input architecture of the
MAX1036
–
MAX1039 from high-voltage spikes on the
bus lines and minimize crosstalk and undershoot of the
bus signals.
Bit Transfer
One data bit is transferred during each SCL clock
cycle. Nine clock cycles are required to transfer the
data in or out of the MAX1036
–
MAX1039. The data on
SDA must remain stable during the high period of the
SCL clock pulse. Changes in SDA while SCL is high are
control signals (see the
START and STOP Conditions
section). Both SDA and SCL idle high when the bus is
not busy.
START and STOP Conditions
The master initiates a transmission with a START condi-
tion (S), a high-to-low transition on SDA with SCL high.
The master terminates a transmission with a STOP
condition (P), a low-to-high transition on SDA, while
M
2.7V to 5.5V, Low-Power, 4-/12-Channel
2-Wire Serial 8-Bit ADCs
______________________________________________________________________________________
11
BIT 7
(MSB)
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
(LSB)
REG
SEL2
SEL1
SEL0
CLK
BIP/
UNI
RST
X
BIT
7
6
5
4
3
2
NAME
REG
SEL2
SEL1
SEL0
CLK
BIP/
UNI
DESCRIPTION
Register bit. 1 = Setup Byte, 0 = Configuration Byte (Table 2).
Three bits select the reference voltage and the state of AIN_/REF (Table 6). Default to 000 at
power-up.
1 = External clock, 0 = Internal clock. Defaulted to zero at power-up.
1 = Bipolar, 0 = Unipolar. Defaulted to zero at power-up (see the
Unipolar/Bipolar
section).
1
RST
1 = No action, 0 = Resets the configuration register to default. Setup register remains
unchanged.
0
X
Don
’
t care, can be set to 1 or 0.
Table 1. Setup Byte Format
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1038AEEE+ | 功能描述:模數轉換器 - ADC 5V 12-Bit 4Ch I2C Serial RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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:模數轉換器 - ADC 5V 12-Bit 4Ch I2C Serial RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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:數據轉換 IC 開發(fā)工具 RoHS:否 制造商:Texas Instruments 產品: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:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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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