MAX1227_12 Datasheet, PDF (1/22 Pages) Maxim Integrated Products – 12-Bit 300ksps ADCs with FIFO,Temp Sensor, Internal Reference

19-2851; Rev 7; 4/12
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12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
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
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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
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
Ordering Information continued at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad (TQFN only). Connect to GND.
Pin Configurations
TOP VIEW
+
AIN0 ₁
AIN1 2
AIN2 3
AIN3 4 MAX1227
AIN4 5
AIN5 6
REF-/AIN6 7
CNVST/AIN7 8
16 EOC
15 DOUT
14 DIN
13 CS
12 SCLK
11 V_DD
10 GND
9 REF+
QSOP
Pin Configurations continued at end of data sheet.
+
AIN0 1
AIN1 2
AIN2 3
AIN3 4
AIN4 5
MAX1229
AIN5 6
AIN6 7
AIN7 8
AIN8 9
AIN9 10
20 EOC
19 DOUT
18 DIN
17 CS
16 SCLK
15 V_DD
14 GND
13 REF+
12 CNVST/AIN11
11 REF-/AIN10
QSOP
________________________________________________________________ Maxim Integrated Products 1
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.