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MAX1247BCEE+ Datasheet

  • MAX1247BCEE+

  • A/D Converter (A-D) IC; Resolution (Bits):12; Sample Rate:13...

  • 25頁

  • Maxim   Maxim

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19-1071; Rev 2; 10/01
KIT
ATION
EVALU
BLE
AVAILA
+2.7V, Low-Power, 4-Channel,
Serial 12-Bit ADCs in QSOP-16
Features
o
4-Channel Single-Ended or 2-Channel
Differential Inputs
o
Single-Supply Operation:
+2.7V to +3.6V (MAX1246)
+2.7V to +5.25V (MAX1247)
o
Internal 2.5V Reference (MAX1246)
o
Low Power: 1.2mA (133ksps, 3V supply)
54碌A(chǔ) (1ksps, 3V supply)
1碌A(chǔ) (power-down mode)
o
SPI/QSPI/MICROWIRE/TMS320-Compatible
4-Wire Serial Interface
o
Software-Configurable Unipolar or Bipolar Inputs
o
16-Pin QSOP Package (same area as 8-pin SO)
General Description
The MAX1246/MAX1247 12-bit data-acquisition systems
combine a 4-channel multiplexer, high-bandwidth
track/hold, and serial interface with high conversion
speed and low power consumption. The MAX1246 oper-
ates from a single +2.7V to +3.6V supply; the MAX1247
operates from a single +2.7V to +5.25V supply. Both
devices鈥?analog inputs are software configurable for
unipolar/bipolar and single-ended/differential operation.
The 4-wire serial interface connects directly to SPI鈩?
QSPI鈩?and MICROWIRE鈩?devices without external
logic. A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1246/
MAX1247 use either the internal clock or an external seri-
al-interface clock to perform successive-approximation
analog-to-digital conversions.
The MAX1246 has an internal 2.5V reference, while the
MAX1247 requires an external reference. Both parts have
a reference-buffer amplifier with a 鹵1.5% voltage-
adjustment range. These devices provide a hard-wired
SHDN
pin and a software-selectable power-down, and
can be programmed to automatically shut down at the
end of a conversion. Accessing the serial interface auto-
matically powers up the MAX1246/MAX1247, and the
quick turn-on time allows them to be shut down between
all conversions. This technique can cut supply current to
under 60碌A(chǔ) at reduced sampling rates. The MAX1246/
MAX1247 are available in a 16-pin DIP and a small QSOP
that occupies the same board area as an 8-pin SO.
For 8-channel versions of these devices, see the
MAX146/MAX147 data sheet.
MAX1246/MAX1247
Ordering Information
PART
MAX1246ACPE
MAX1246BCPE
MAX1246ACEE
MAX1246BCEE
TEMP RANGE
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
PIN-PACKAGE
16 Plastic DIP
16 Plastic DIP
16 QSOP
16 QSOP
INL
(LSB)
鹵1/2
鹵1
鹵1/2
鹵1
Ordering Information continued at end of data sheet.
________________________Applications
Portable Data Logging
Medical Instruments
Pen Digitizers
Data Acquisition
Battery-Powered Instruments
Process Control
0V TO
+2.5V
ANALOG
INPUTS
+3V
CH0
V
DD
DGND
V
DD
0.1碌F
__________Typical Operating Circuit
MAX1246
AGND
CH3
VREF
COM
CS
SCLK
DIN
REFADJ
DOUT
SSTRB
SHDN
V
SS
I/O
SCK (SK)
MOSI (SO)
MISO (SI)
CPU
4.7碌F
Pin Configuration appears at end of data sheet.
0.047碌F
SPI and QSPI are registered trademarks of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX1247BCEE+ 產(chǎn)品屬性

  • Lead (SnPb) Finish for COTSObsolescence Mitigation Program

  • 100

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器

  • -

  • 12

  • 133k

  • MICROWIRE?，QSPI?，串行，SPI?

  • 1

  • 667mW

  • 單電源

  • 0°C ~ 70°C

  • 表面貼裝

  • 16-SSOP（0.154"，3.90mm 寬）

  • 16-QSOP

  • 管件

  • 4 個單端，單極；4 個單端，雙極；2 個差分，單極；2 個差分，雙極

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