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MAX1148BEUP+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
General Description
The MAX1146–MAX1149 low-power, 14-bit, multichan-
nel, analog-to-digital converters (ADCs) feature an
internal track/hold (T/H), voltage reference, and clock.
The MAX1146/MAX1148 operate from a single +4.75V
to +5.25V supply, and the MAX1147/MAX1149 operate
from a single +2.7V to +3.6V supply. All analog inputs
are software configurable for unipolar/bipolar and sin-
gle-ended/differential operation.
The 4-wire serial interface connects directly to
SPI™/QSPI™/MICROWIRE™ devices without external
logic. The serial strobe output (SSTRB) allows conve-
nient connection to digital signal processors. The
MAX1146–MAX1149 use an internal clock or an exter-
nal serial-interface clock to perform successive-approx-
imation analog-to-digital conversions.
The MAX1146/MAX1148 include an internal +4.096V
reference, while the MAX1147/MAX1149 include an
internal +2.500V reference. All devices accept an exter-
nal reference from 1.5V to V
DD
.
The MAX1146–MAX1149 provide a hardware shutdown
and two software power-down modes. Using the soft-
ware power-down modes allows the devices to be pow-
ered down between conversions. When powered down,
accessing the serial interface automatically powers up
the devices. The quick turn-on time allows power-down
between all conversions. This technique reduces sup-
ply current to under 120µA for quick turn-on.
The MAX1146–MAX1149 are available in a 20-pin
TSSOP package.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Process Control
Features
♦ 8-Channel Single-Ended or 4-Channel Differential
Inputs (MAX1148/MAX1149)
♦ 4-Channel Single-Ended or 2-Channel Differential
Inputs (MAX1146/MAX1147)
♦ Internal Multiplexer and T/H
♦ Single-Supply Operation
4.75V to 5.25V Supply (MAX1146/MAX1148)
2.7V to 3.6V Supply (MAX1147/MAX1149)
♦ Internal Reference
+4.096V (MAX1146/MAX1148)
+2.500V (MAX1147/MAX1149)
♦ 116ksps Sampling Rate
♦ Low Power
1.1mA (116ksps)
120µA (10ksps)
12µA (1ksps)
300nA (Power-Down Mode)
♦ SPI-/QSPI-/MICROWIRE Compatible
♦ 20-Pin TSSOP
MAX1146–MAX1149
Multichannel, True-Differential,
Serial, 14-Bit ADCs
________________________________________________________________ Maxim Integrated Products 1
Ordering Information/Selector Guide
19-3488; Rev 2; 1/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART
TEMP
RANGE
PIN-
PACKAGE
INL
(LSB)
INPUT
CHANNELS
INTERNAL
REFERENCE (V)
PKG
CODE
MAX1146BCUP 0°C to +70°C 20 TSSOP ±2 4 +4.096 U20-3
MAX1146BEUP -40°C to +85°C 20 TSSOP ±2 4 +4.096 U20-3
MAX1147BCUP 0°C to +70°C 20 TSSOP ±2 4 +2.500 U20-3
MAX1147BEUP -40°C to +85°C 20 TSSOP ±2 4 +2.500 U20-3
MAX1148BCUP 0°C to +70°C 20 TSSOP ±2 8 +4.096 U20-3
MAX1148BEUP -40°C to +85°C 20 TSSOP ±2 8 +4.096 U20-3
MAX1149BCUP 0°C to +70°C 20 TSSOP ±2 8 +2.500 U20-3
MAX1149BEUP -40°C to +85°C 20 TSSOP ±2 8 +2.500 U20-3
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configurations appear at end of data sheet.
MAX1146–MAX1149
Multichannel, True-Differential,
Serial, 14-Bit ADCs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 5V (MAX1146/MAX1148), V
DD
= 3.3V (MAX1147/MAX1149), SHDN = V
DD
, V
COM
= 0, f
SCLK
= 2.1MHz, external clock (50%
duty cycle), 18 clocks/conversion (116ksps), V
REFADJ
= V
DD
, C
REF
= 2.2µF, external +4.096V reference at REF (MAX1146/
MAX1148), external 2.500V reference at REF (MAX1147/MAX1149), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to AGND, DGND............................................-0.3V to +6.0V
AGND to DGND.....................................................-0.3V to +0.3V
CH0–CH7, COM to AGND..........................-0.3V to (V
DD
+ 0.3V)
REF, REFADJ to AGND ..............................-0.3V to (V
DD
+ 0.3V)
Digital Inputs to DGND...............................-0.3V to (V
DD
+ 0.3V)
Digital Outputs to DGND............................-0.3V to (V
DD
+ 0.3V)
Digital Output Sink Current .................................................25mA
Continuous Power Dissipation (T
A
= +70°C)
20 TSSOP (derate 10.9mW/°C above +70°C) .............879mW
Operating Temperature Ranges
MAX114_ BC_ _ ..................................................0°C to +70°C
MAX114_ BE_ _ ...............................................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
DC ACCURACY (Note 1)
Resolution 14 Bits
Relative Accuracy (Note 2) INL
±0.7
±2 LSB
Differential Nonlinearity DNL No missing codes over temperature
-1.0 ±0.5 +1.5
LSB
Offset Error
±10
LSB
Offset Temperature Coefficient 0.3
ppm/°C
Gain Error (Note 3)
±20
LSB
Gain Temperature Coefficient
±0.8
ppm/°C
Channel-to-Channel Offset
Matching
±1 LSB
Channel-to-Channel Gain
Matching
±1 LSB
DYNAMIC SPECIFICATIONS (1kHz sine-wave input, 2.5V
P-P
, full-scale analog input, 116ksps, 2.1MHz external clock)
Signal-to-Noise Plus Distortion
Ratio
SINAD 77 81 dB
Total Harmonic Distortion THD Up to the 5th harmonic -96 -88 dB
Spurious-Free Dynamic Range SFDR 84 98 dB
Channel-to-Channel Crosstalk (Note 4) -85 dB
Small-Signal Bandwidth SSBW -3dB point 3.0
MHz
Full-Power Bandwidth FPBW SINAD > 68dB 2.0
MHz
CONVERSION RATE
External clock, 2.1MHz 15 SCLK cycles 7.2
Conversion Time (Note 5) t
CONV
Internal clock 6 8
µs
MAX1146–MAX1149
Multichannel, True-Differential,
Serial, 14-Bit ADCs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V (MAX1146/MAX1148), V
DD
= 3.3V (MAX1147/MAX1149), SHDN = V
DD
, V
COM
= 0, f
SCLK
= 2.1MHz, external clock (50%
duty cycle), 18 clocks/conversion (116ksps), V
REFADJ
= V
DD
, C
REF
= 2.2µF, external +4.096V reference at REF (MAX1146/
MAX1148), external 2.500V reference at REF (MAX1147/MAX1149), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
18 clocks/conversion 60.3
Internal clock mode,
f
SCLK
= 2.1MHz
24 clocks/conversion 51.5
18 clocks/conversion 116.66
Throughput Rate
f
SAMPLE
External clock mode,
f
SCLK
= 2.1MHz
24 clocks/conversion 87.50
ksps
T/H Acquisition Time t
ACQ
1.4 µs
Aperture Delay t
AD
20 ns
Aperture Jitter t
AJ
<50
ps
External clock mode 0.1 2.1
Serial Clock Frequency f
SCLK
Internal clock mode 0 2.1
MHz
Internal Clock Frequency 2.1
MHz
ANALOG INPUTS (CH0–CH7, COM)
Unipolar, COM = 0 0
V
REF
Input Voltage Range, Single-
Ended and Differential (Note 6)
Bipolar, COM = V
REF
/ 2, single-ended
±V
REF
/ 2
V
Multiplexer Leakage Current On/off-leakage current, V
CH
_ = 0 to V
DD
±0.01
±1 µA
Input Capacitance 18 pF
INTERNAL REFERENCE (C
REF
= 2.2µF, C
REFADJ
= 0.01µF)
MAX1147/MAX1149, T
A
= +25°C
2.480 2.500 2.520
REF Output Voltage V
REF
MAX1146/MAX1148, T
A
= +25°C
4.076 4.096 4.116
V
REF Short-Circuit Current I
REFSC
REF = DGND 20 mA
MAX114_ BC _ _
±30 ±50
V
REF
Tempco (Note 7)
MAX114_ BE _ _
±40 ±60
ppm/°C
Load Regulation 0 to 0.2mA output load (Note 8) 2.0 mV
Capacitive Bypass at REF 2µF
Capacitive Bypass at REFADJ
0.01
µF
REFADJ Output Voltage
1.250
V
REFADJ Input Range
±18
mV
REFADJ Logic High
Pull REFADJ high to disable the internal
bandgap reference and reference buffer
V
DD
-
0.25V
V
MAX1147/MAX1149
2.000
Reference Buffer Voltage Gain
MAX1146/MAX1148
3.277
V/V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

MAX1148BEUP+T

Mfr. #:
Buy MAX1148BEUP+T
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 14-Bit 8Ch 116ksps 5V Precision ADC
Lifecycle:
New from this manufacturer.
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