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MAX1231ACEG+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
General Description
The MAX1227/MAX1229/MAX1231 are serial 12-bit ana-
log-to-digital converters (ADCs) with an internal reference
and an internal temperature sensor. These devices fea-
ture an on-chip FIFO, scan mode, internal clock mode,
internal averaging, and AutoShutdown™. The maximum
sampling rate is 300ksps using an external clock. The
MAX1231 has 16 input channels, the MAX1229 has 12
input channels, and the MAX1227 has 8 input channels.
All input channels are configurable for single-ended or
differential inputs in unipolar or bipolar mode. All three
devices operate from a +3V supply and contain a 10MHz
SPI™-/QSPI™-/MICROWIRE™-compatible serial port.
The MAX1231 is available in 28-pin 5mm x 5mm TQFN
with exposed pad and 24-pin QSOP packages. The
MAX1227/MAX1229 are only available in QSOP pack-
ages. All three devices are specified over the extended
-40°C to +85°C temperature range.
________________________Applications
System Supervision
Data-Acquisition Systems
Industrial Control Systems
Patient Monitoring
Data Logging
Instrumentation
Features
o Internal Temperature Sensor (±0.7°C Accuracy)
o 16-Entry First-In/First-Out (FIFO)
o Analog Multiplexer with True Differential
Track/Hold
16-, 12-, 8-Channel Single Ended
8-, 6-, 4-Channel True Differential
(Unipolar or Bipolar)
o Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing
Codes Overtemperature
o Scan Mode, Internal Averaging, and Internal Clock
o Low-Power Single +3V Operation
1mA at 300ksps
o Internal 2.5V Reference or External Differential
Reference
o 10MHz 3-Wire SPI-/QSPI-/MICROWIRE-Compatible
Interface
o Space-Saving 28-Pin 5mm x 5mm TQFN Package
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
________________________________________________________________
Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
AIN0
TOP VIEW
EOC
DOUT
DIN
CS
SCLK
V
DD
GND
REF+
MAX1227
QSOP
AIN1
AIN2
AIN5
AIN3
AIN4
REF-/AIN6
CNVST/AIN7
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
EOC
DOUT
DIN
CSAIN3
AIN2
AIN1
AIN0
SCLK
V
DD
GND
REF+AIN7
AIN6
AIN5
AIN4
12
11
9
10
CNVST/AIN11
REF-/AIN10AIN9
AIN8
MAX1229
QSOP
+
+
Pin Configurations
19-2851; Rev 7; 4/12
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.
EVALUATION KIT
AVAILABLE
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX1227BCEE+ 0°C to +70°C 16 QSOP
MAX1227BEEE+ -40°C to +85°C 16 QSOP
MAX1229BCEP+ 0°C to +70°C 20 QSOP
MAX1229BEEP+ -40°C to +85°C 20 QSOP
Pin Configurations continued at end of data sheet.
Ordering Information continued at end of data sheet.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad (TQFN only). Connect to GND.
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V, f
SAMPLE
= 300kHz, f
SCLK
= 4.8MHz (50% duty cycle), V
REF
= 2.5V, 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 GND..............................................................-0.3V to +6V
CS, SCLK, DIN, EOC, DOUT to GND.........-0.3V to (V
DD
+ 0.3V)
AIN0–AIN13, REF-/AIN_, CNVST/AIN_,
REF+ to GND.........................................-0.3V to (V
DD
+ 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
20-Pin QSOP (derate 9.1mW/°C above +70°C)...........727mW
24-Pin QSOP (derate 9.5mW/°C above +70°C)...........762mW
28-Pin TQFN 5mm x 5mm
(derate 20.8mW/°C above +70°C)........................1667mW
Operating Temperature Ranges
MAX12__C__.......................................................0°C to +70°C
MAX12__E__....................................................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC ACCURACY (NOTE 1)
Resolution RES 12 Bits
Integral Nonlinearity INL ±1.0 LSB
Differential Nonlinearity DNL No missing codes over temperature ±1.0 LSB
Offset Error ±0.5 ±4.0 LSB
Gain Error (Note 2) ±0.5 ±4.0 LSB
Offset Error Temperature
Coefficient
±2
ppm/°C
FSR
Gain Temperature Coefficient ±0.8 ppm/°C
Channel-to-Channel Offset
Matching
±0.1 LSB
DYNAMIC SPECIFICATIONS (30kHz sine wave input, 2.5V
P-P
, 300ksps, f
SCLK
= 4.8MHz)
Signal-to-Noise Plus Distortion SINAD 71 dB
Total Harmonic Distortion THD Up to the 5th harmonic -80 dBc
Spurious-Free Dynamic Range SFDR 81 dBc
Intermodulation Distortion IMD f
IN1
= 29.9kHz, f
IN2
= 30.2kHz 76 dBc
Full-Power Bandwidth -3dB point 1 MHz
Full-Linear Bandwidth S/(N + D) > 68dB 100 kHz
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V, f
SAMPLE
= 300kHz, f
SCLK
= 4.8MHz (50% duty cycle), V
REF
= 2.5V, 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
CONVERSION RATE
External reference 0.8
Power-Up Time t
PU
Internal reference (Note 3) 65
µs
Acquisition Time t
ACQ
0.6 µs
Internally clocked 3.5
Conversion Time t
CONV
Externally clocked (Note 4) 2.7
µs
Externally clocked conversion 0.1 4.8
External Clock Frequency f
SCLK
Data I/O 10
MHz
SCLK Duty Cycle 40 60 %
Aperture Delay 30 ns
Aperture Jitter <50 ps
ANALOG INPUT
Unipolar 0 V
REF
Input Voltage Range
Bipolar (Note 5) - V
RE F
/2 V
RE F
/2
V
Input Leakage Current V
IN
= V
DD
±0.01 ±1 µA
Input Capacitance During acquisition time (Note 6) 24 pF
INTERNAL TEMPERATURE SENSOR
T
A
= +25°C ±0.7
Measurement Error (Note 7)
T
A
= T
MIN
to T
MAX
±1.2 ±2.5
°C
Tem p er atur e M easur em ent N oi se 0.4 °C
RMS
Temperature Resolution 1/8 °C
Power-Supply Rejection 0.3 °C/V
INTERNAL REFERENCE
REF Output Voltage 2.48 2.50 2.52 V
REF Temperature Coefficient TC
REF
±30 p p m /° C
Output Resistance 6.5 kΩ
REF Output Noise 200 µV
RMS
REF Power-Supply Rejection PSRR -70 dB
EXTERNAL REFERENCE INPUT
REF- Input Voltage Range V
REF-
0 500 mV
REF+ Input Voltage Range V
REF+
1.0 V
DD
+ 50mV V
V
REF+
= 2.5V, f
SAMPLE
= 300ksps 40 100
REF+ Input Current I
REF+
V
REF+
= 2.5V, f
SAMPLE
= 0 ±0.1 ±5
µA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

MAX1231ACEG+T

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Buy MAX1231ACEG+T
Manufacturer:
Maxim Integrated
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