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參數資料
| 型號： | MAX149AEPP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/23頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT SERIAL 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： | -40°C ~ 85°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 |
1
+2.7V to +5.25V, Low-Power, 8-Channel,
Serial 10-Bit ADCs
MAX148/MAX149
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX148/MAX149 10-bit data-acquisition systems
combine an 8-channel multiplexer, high-bandwidth
track/hold, and serial interface with high conversion
speed and low power consumption. They operate from a
single +2.7V to +5.25V supply, and sample to 133ksps.
Both devices’ analog inputs are software configurable for
unipolar/bipolar and single-ended/differential operation.
The 4-wire serial interface connects directly to SPI/
QSPIK and MICROWIREK devices without external
logic. A serial-strobe output allows direct connection to
TMS320-family digital signal processors. The MAX148/
MAX149 use either the internal clock or an external seri-
al-interface clock to perform successive-approximation
analog-to-digital conversions.
The MAX149 has an internal 2.5V reference, while the
MAX148 requires an external reference. Both parts
have a reference-buffer amplifier with a Q1.5% voltage-
adjustment range.
These devices provide a hard-wired SHDN pin and
a software-selectable power-down, and can be pro-
grammed to automatically shut down at the end of a
conversion. Accessing the serial interface automatically
powers up the MAX148/MAX149, and the quick turn-on
time allows them to be shut down between all conver-
sions. This technique can cut supply current to under
60FA at reduced sampling rates.
The MAX148/MAX149 are available in 20-pin PDIP and
20-pin SSOP packages.
For 4-channel versions of these devices, see the
MAX1248/MAX1249 data sheet.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Features
S
8-Channel Single-Ended or 4-Channel Differential
Inputs
S
Single-Supply Operation: +2.7V to +5.25V
S
Internal 2.5V Reference (MAX149)
S
Low Power: 1.2mA (133ksps, 3V Supply)
54A (1ksps, 3V Supply)
1A (Power-Down Mode)
S
SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
S
Software-Configurable Unipolar or Bipolar Inputs
S
20-Pin DIP/SSOP Packages
19-0464; Rev 5; 1/12
Typical Operating Circuit
Ordering Information
Ordering Information continued at end of data sheet.
Contact factory for availability of alternate surface-mount
package.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
QSPI is a trademark of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
PART
TEMP RANGE
PIN-
PACKAGE
INL
(LSB)
MAX148ACPP+
0°C to +70°C
20 PDIP
±1/2
MAX148BCPP+
0°C to +70°C
20 PDIP
±1
MAX148ACAP+
0°C to +70°C
20 SSOP
±1/2
MAX148BCAP+
0°C to +70°C
20 SSOP
±1
CPU
VDD
VSS
VDD
DGND
AGND
COM
SCLK
DIN
DOUT
SSTRB
READJ
VREF
CH7
CH0
+3V
0.1FF
4.7FF
O TO
+2.5V
ANALOG
INPUTS
0.01FF
I/O
SCK (SK)
MOSI (SO)
MISO (SI)
MAX149
CS
SHDN
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX149AEPP+ | 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 |
| MAX149AMJP | 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 |
| MAX149BCAP | 功能描述:模數轉換器 - ADC Integrated Circuits (ICs) 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 |
| MAX149BCAP+ | 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 |
| MAX149BCAP+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 |
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