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MAX148BEAP

Description
Analog to Digital Converters - ADC +2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs
CategoryAnalog mixed-signal IC    converter   
File Size2MB,23 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX148BEAP Overview

Analog to Digital Converters - ADC +2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs

MAX148BEAP Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeSSOP
package instructionSSOP-20
Contacts20
Reach Compliance Codenot_compliant
ECCN codeEAR99
Factory Lead Time1 week
Maximum analog input voltage1.25 V
Minimum analog input voltage-1.25 V
Maximum conversion time65 µs
Converter typeADC, SUCCESSIVE APPROXIMATION
JESD-30 codeR-PDSO-G20
JESD-609 codee0
length7.2 mm
Maximum linear error (EL)0.0977%
Humidity sensitivity level1
Number of analog input channels8
Number of digits10
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Output bit codeBINARY, 2\'S COMPLEMENT BINARY
Output formatSERIAL
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeSSOP20,.3
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)245
power supply3/5 V
Certification statusNot Qualified
Sampling rate0.133 MHz
Sample and hold/Track and holdSAMPLE
Maximum seat height1.99 mm
Nominal supply voltage3 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width5.29 mm
19-0464; Rev 5; 1/12
+2.7V to +5.25V, Low-Power, 8-Channel,
Serial 10-Bit ADCs
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.
Inputs
S
Single-Supply Operation: +2.7V to +5.25V
S
Internal 2.5V Reference (MAX149)
S
Low Power: 1.2mA (133ksps, 3V Supply)
Features
S
8-Channel Single-Ended or 4-Channel Differential
MAX148/MAX149
54µA (1ksps, 3V Supply)
1µA (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
Ordering Information
PART†
MAX148ACPP+
MAX148BCPP+
MAX148ACAP+
MAX148BCAP+
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-
PACKAGE
20 PDIP
20 PDIP
20 SSOP
20 SSOP
INL
(LSB)
±1/2
±1
±1/2
±1
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.
Typical Operating Circuit
+3V
CH0
O TO
+2.5V
ANALOG
INPUTS
CH7
V
REF
4.7FF
READJ
V
DD
0.1FF
DGND
MAX149
V
DD
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Pin Configuration appears at end of data sheet.
AGND
COM
CS
SCLK
DIN
DOUT
SSTRB
SHDN
CPU
I/O
SCK (SK)
MOSI (SO)
MISO (SI)
V
SS
0.01FF
QSPI is a trademark of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
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.
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