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參數(shù)資料
| 型號： | MAX1145AEAP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT 150KSPS 20-SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 66 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 150k |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 26.4mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，單極；1 個單端，雙極 |
range is 0 to +2.048V (unipolar) or
±2.048V (bipolar).
Unipolar and bipolar mode selection is configured with
bit 6 of the serial control byte (Table 1).
Figure 1 shows the equivalent input circuit of the
MAX1144/MAX1145. The resistor network on the analog
input provides
±16.5V fault protection. This circuit limits
the current going into or out of the pin to less than 2mA.
The overvoltage protection is active even if the device
is in a power-down mode, or if AVDD = 0.
Digital Interface
The digital interface pins consist of SHDN, RST, SSTRB,
DOUT, SCLK, DIN, and CS. Bringing SHDN low places
the MAX1144/MAX1145 in its 1.2A shutdown mode. A
logic low on RST halts the MAX1144/MAX1145 opera-
tion and returns the part to its power-on-reset state.
In external clock mode, SSTRB is low and pulses high
for one clock cycle at the start of conversion. In internal
clock mode, SSTRB goes low at the start of the conver-
sion, and goes high to indicate that the conversion is
finished.
The DIN input accepts control byte data, which is
clocked in on each rising edge of SCLK. After CS goes
low or after a conversion or calibration completes, the
first logic “1” clocked into DIN is interpreted as the
START bit, the MSB of the 8-bit control byte.
The SCLK input is the serial-data-transfer clock which
clocks data in and out of the MAX1144/MAX1145.
SCLK also drives the ADC conversion steps in external
clock mode (see the Internal and External Clock Modes
section).
DOUT is the serial output of the conversion result.
DOUT is updated on the falling edge of SCLK. DOUT is
high impedance when CS is high.
CS must be low for the MAX1144/MAX1145 to accept a
control byte. The serial interface is disabled when CS is
high.
User-Programmable Outputs
The MAX1144/MAX1145 have three user-programma-
ble outputs: P0, P1, and P2. The power-on default state
for the programmable outputs is zero. These are push-
pull CMOS outputs suitable for driving a multiplexer, a
PGA or other signal preconditioning circuitry. Bits 0, 1,
and 2 of the control byte control the user-programma-
ble outputs (Tables 1, 2).
MAX1144/MAX1145
14-Bit ADCs, 150ksps, 3.3V Single Supply
_______________________________________________________________________________________
9
ACQUISITION
CONVERSION
IDLE
SCLK
DOUT
A/D
STATE
DIN
SSTRB
CS
4
18
12
START
M1
M0
P2
P1
P0
15
21
24
B10
B9
B12
B11
B8
B7
B2
B13
MSB
B0
LSB
FILLED WITH
ZEROS
B1
X
tACQ
UNI/
BIP
INT/
EXT
Figure 2. Short Acquisition Mode (24 Clock Cycles) External Clock
OUTPUT PIN
PROGRAMMED
THROUGH CONTROL
BYTE
POWER-ON OR
RST DEFAULT
DESCRIPTION
P2
Bit 2
0
P1
Bit 1
0
P0
Bit 0
0
User-programmable outputs follow the state of the control
byte’s three LSBs, and are updated simultaneously when a
new control byte is written. Outputs are push-pull. In hardware
and software shutdown, these outputs are unchanged and
remain low impedance.
Table 2. User-Programmable Outputs
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參數(shù)描述 |
|---|---|
| MAX1145AEAP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 150ksps 2.2V Precision 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 |
| MAX1145AEAP+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 150ksps 2.2V Precision 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 |
| MAX1145AEAP-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 |
| MAX1145BCAP | 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 |
| MAX1145BCAP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 150ksps 2.2V Precision 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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