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參數(shù)資料
| 型號： | MAX148 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs(8通道，133ksps，串行10位A/D轉(zhuǎn)換器) |
| 中文描述： | +2.7V至+5.25V、低功耗、8通道、串行10位ADC |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 200K |
| 代理商： | MAX148 |
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_______________General Desc ription
The MAX148 10-bit data-acquisition system combines an
8-channel multiplexer, high-bandwidth track/hold, and
serial interface with high conversion speed and ultra-low
power consumption. It operates from a single +2.7V to
+5.25V supply, and its analog inputs are software config-
urable for unipolar/bipolar and single-ended/differential
operation.
The 4-wire serial interface directly connects to SPI ,
QSPI, and Microwire devices without external logic.
A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX148
requires an external reference, and uses either the
internal clock or an external serial-interface clock to
perform successive-approximation analog-to-digital
conversions.
This device provides a hard-wired
SHDN
pin and a
software-selectable power-down. Accessing the serial
interface automatically powers up the MAX148, and the
quick turn-on time allows it to be shut down between
conversions. This technique can cut supply current to
under 10μA at reduced sampling rates.
The MAX148 is available in a 20-pin DIP package and an
SSOP that occupies 30% less area than an 8-pin DIP.
________________________Applic ations
Portable Data Logging
Pen-Entry Devices
Battery-Powered Instruments
Data Acquisition
Medical Instruments
____________________________Features
o
8-Channel Single-Ended or 4-Channel
Differential Inputs
o
Single +2.7V to +5.25V Supply Operation
o
Low Power: 0.9mA (operating mode)
1μA (power-down mode)
o
Internal Track/Hold, 133kHz Sampling Rate
o
SPI/QSPI/Microwire/TMS320-Compatible 4-Wire
Serial Interface
o
Software-Configurable Unipolar or Bipolar Inputs
o
20-Pin DIP/SSOP Packages
o
Pin-Compatible 12-Bit Upgrade: MAX147
M
+2.7V, Low-Power, 8-Channel,
S erial 10-Bit ADC
________________________________________________________________ Maxim Integrated Products
1
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
TOP VIEW
DIP/SSOP
V
DD
SCLK
CS
DIN
SSTRB
DOUT
DGND
AGND
V
DD
VREF
SHDN
COM
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
MAX148
__________________Pin Configuration
V
DD
I/O
SCK (SK)*
MOSI (SO)
MISO(SI)
V
SS
SHDN
SSTRB
DOUT
DIN
SCLK
CS
COM
COMP
GND
AGND
DGND
V
DD
V
OUT
CH7
0.1
μ
F
1000pF
0.1
μ
F
CH0
0V to
+2.5V
ANALOG
INPUTS
MAX148
MAX872
CPU
+3V
+2.5V
+3V
VREF
__________Typic al Operating Circ uit
19-0464; Rev 0; 1/96
PART
MAX148ACPP
MAX148BCPP
MAX148ACAP
MAX148BCAP
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
20 Plastic DIP
20 Plastic DIP
20 SSOP
20 SSOP
______________Ordering Information
Ordering Information continued at end of data sheet.
Contact factory for availability of SO package.
INL
(LSB)
±1/2
±1
±1/2
±1
SPI and QSPI are registered trademarks of Motorola, Inc. Microwire is a registered trademark of National Semiconductor Corp.
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