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參數資料
| 型號： | MAX148BCPP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 3/23頁 |
| 文件大小： | 0K |
| 描述： | IC ADC SRL 8CH 10BIT LP 20-DIP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 18 |
| 位數： | 10 |
| 采樣率（每秒）： | 133k |
| 數據接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 889mW |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 20-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 20-PDIP |
| 包裝： | 管件 |
| 輸入數目和類型： | 8 個單端，單極；8 個單端，雙極；4 個差分，單極；4 個差分，雙極 |
+2.7V to +5.25V, Low-Power, 8-Channel,
Serial 10-Bit ADCs
MAX148/MAX149
11
Table 3. Channel Selection in Differential Mode (SGL/DIF = 0)
Figure 6. 24-Clock External Clock Mode Conversion Timing (MICROWIRE and SPI-Compatible, QSPI-Compatible with fSCLK P 2MHz)
Simple Software Interface
Make sure the CPU’s serial interface runs in master
mode so the CPU generates the serial clock. Choose a
clock frequency from 100kHz to 2MHz.
1) Set up the control byte for external clock mode and
call it TB1. TB1 should be of the format: 1XXXXX11
binary, where the Xs denote the particular channel
and conversion mode selected.
2) Use a general-purpose I/O line on the CPU to pull CS
low.
3) Transmit TB1 and, simultaneously, receive a byte
and call it RB1. Ignore RB1.
4) Transmit a byte of all zeros ($00 hex) and, simultane-
ously, receive byte RB2.
5) Transmit a byte of all zeros ($00 hex) and, simultane-
ously, receive byte RB3.
6) Pull CS high.
Figure 6 shows the timing for this sequence. Bytes RB2
and RB3 contain the result of the conversion, padded
with one leading zero, two sub-LSB bits, and three
trailing zeros. The total conversion time is a function of
the serial-clock frequency and the amount of idle time
between 8-bit transfers. To avoid excessive T/H droop,
make sure the total conversion time does not exceed
120Fs.
Digital Output
In unipolar input mode, the output is straight binary
(Figure 17). For bipolar input mode, the output is twos
complement (Figure 18). Data is clocked out at the fall-
ing edge of SCLK in MSB-first format.
Clock Modes
The MAX148/MAX149 may use either an external serial
clock or the internal clock to perform the successive-
approximation conversion. In both clock modes, the exter-
nal clock shifts data in and out of the MAX148/MAX149.
SEL2
SEL1
SEL0
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
0
+
-
0
1
+
-
0
1
0
+
-
0
1
+
-
1
0
-
+
1
0
1
-
+
1
0
-
+
1
-
+
1
4
8
12
16
20
24
START
SEL2 SEL1 SEL0
UNI/
BIP
SGL/
DIF
PD1 PD0
B9
MSB
B8
B7
B6
B5
B4
B3
B2
B1
S0
S1
B0
LSB
FILLED WITH
ZEROS
RB1
RB2
IDLE
CONVERSION
RB3
ACQUISITION
(fSCLK = 2MHz)
IDLE
1.5Fs
SCLK
tACQ
DIN
SSTRB
DOUT
A/D STATE
CS
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX148BCPP+ | 功能描述:模數轉換器 - ADC 10-Bit 8Ch 133ksps 5.25V Precision 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 |
| MAX148BEAP | 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 |
| MAX148BEAP+ | 功能描述:模數轉換器 - ADC 10-Bit 8Ch 133ksps 5.25V Precision 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 |
| MAX148BEAP+T | 功能描述:模數轉換器 - ADC 10-Bit 8Ch 133ksps 5.25V Precision 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 |
| MAX148BEAP-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 |
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