參數(shù)資料
型號(hào)： 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(yè)數(shù)： 15/22頁(yè)
文件大?。?/td> 427K
代理商： MAX1038AEEE
M
2.7V to 5.5V, Low-Power, 4-/12-Channel
2-Wire Serial 8-Bit ADCs
______________________________________________________________________________________
15
Applications Information
Power-On Reset
The configuration and setup registers (Tables 1 and 2)
default to a single-ended, unipolar, single-channel con-
version on AIN0 using the internal clock with V
DD
as the
reference and AIN_/REF configured as an analog input.
The RAM contents are unknown after power-up.
Automatic Shutdown
SEL[2:0] of the setup byte (Tables 1 and 6) controls the
state of the reference and AIN_/REF. If automatic shut-
down is selected (SEL[2:0] = 100), shutdown occurs
between conversions when the MAX1036
–
MAX1039 are
idle. When operating in external clock mode, a STOP
condition must be issued to place the devices in idle
mode and benefit from automatic shutdown. A STOP
condition is not necessary in internal clock mode to ben-
efit from automatic shutdown because power-down
occurs once all contents are written to memory (Figure
10). All analog circuitry is inactive in shutdown and sup-
ply current is less than 1μA. The digital conversion
results are maintained in RAM during shutdown and are
available for access through the serial interface at any
time prior to a STOP or repeated START condition.
When idle, the MAX1036
–
MAX1039 wait for a START
condition followed by their slave address (see the
Slave Address
section). Upon reading a valid address
byte, the MAX1036
–
MAX1039 power up. The analog
circuits do not require any wakeup time from shutdown,
whether using external or internal reference.
Automatic shutdown results in dramatic power savings,
particularly at slow conversion rates. For example, at a
conversion rate of 10ksps, the average supply current
for the MAX1036 is 8μA and drops to 2μA at 1ksps.
At 0.1ksps the average supply current is just 1μA (see
Average Supply Current vs. Conversion Rate in the
Typical Operating Characteristics
section).
Reference Voltage
SEL[2:0] of the setup byte (Table 1) controls the refer-
ence and the AIN_/REF configuration (Table 6). When
AIN_/REF is configured to be a reference input or refer-
ence output (SEL1 = 1), conversions on AIN_/REF
appear as if AIN_/REF is connected to GND (see Note
2 of Tables 3 and 4).
Internal Reference
The internal reference is 4.096V for the MAX1036/
MAX1038 and 2.048V for the MAX1037/MAX1039. SEL1
of the setup byte controls whether AIN_/REF is used for
an analog input or a reference (Table 6). When
AIN_/REF is configured to be an internal reference out-
put (SEL[2:1] = 11), decouple AIN_/REF to GND with a
0.01μF capacitor. Due to the decoupling capacitor and
the 675
reference source impedance, allow 80μs for
the reference to stabilize during initial power-up. Once
powered up, the reference always remains on until
reconfigured. The reference should not be used to sup-
ply current for external circuitry.
BIT 7
(MSB)
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
(LSB)
REG
SCAN1
SCAN0
CS3
CS2
CS1
CS0
SGL/
DIF
BIT
7
6
5
4
3
2
1
NAME
REG
SCAN1
SCAN0
CS3
CS2
CS1
CS0
DESCRIPTION
Register bit. 1 = Setup Byte (Table 1), 0 = Configuration Byte.
Scan select bits. Two bits select the scanning configuration (Table 5). Default to 00 at
power-up.
Channel select bits. Four bits select which analog input channels are to be used for conversion
(Tables 3, 4). Default to 0000 at power-up. For MAX1036/MAX1037, CS3 and CS2 are internally
set to 0.
0
SGL/
DIF
1 = single-ended, 0 = pseudo-differential (Tables 3, 4). Default to 1 at power-up (see the
Single-
Ended/Pseudo-Differential Input
section).
Table 2. Configuration Byte Format
相關(guān)PDF資料
PDF描述
MAX1039AEEE LJT 8C 8#20 PIN RECP
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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(fēng)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(fēng)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1038EVKIT 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開(kāi)發(fā)工具 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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