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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX11161

SAR ADC



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MAX11161 pdf
MAX11161
EVALUATION KIT AVAILABLE
16-Bit, 250ksps, +5V SAR ADC with
Internal Reference in µMAX
General Description
The MAX11161 is a 16-bit, 250ksps, SAR ADC offering
excellent AC and DC performance with true unipolar input
range, internal reference, and small size. The MAX11161
measures a +5V (0 to 5V) input range and can operate
with a single 5V supply. The MAX11161 integrates a low
drift reference with internal buffer, saving the cost and
space of an external reference.
This ADC achieves 92.2dB SNR at 10kHz and -106.5dB
THD. The MAX11161 guarantees 16-bit no-missing codes
and ±0.8 LSB INL (typ).
The MAX11161 communicates using an SPI-compatible
serial interface at 2.3V, 3V, 3.3V, or 5V logic. The serial
interface can be used to daisy-chain multiple ADCs for mul-
tichannel applications and provides a busy indicator option
for simplified system synchronization and timing.
The MAX11161 is offered in a 10-pin, 3mm x 5mm,
µMAXM package and is specified over the -40°C to +85°C
temperature range.
Applications
● Industrial Process Control
● Data Acquisition Systems
● Medical Instrumentation
● Automatic Test Equipment
Selector Guide and Ordering Information appear at end of
data sheet.
Typical Operating Circuit
VDD
(5V)
1µF
VOVDD
(2.3V TO 5V)
1µF
MAX9632
0 TO
5V
10
4.7nF
AIN+
AIN-
10µF
REF
16-BIT ADC
INTERFACE AND CONTROL
MAX11161
REF
BUF
INTERNAL
REFERENCE
SCLK
SDI
SDO
CNVST
GND
HOST
CONTROLLER
Benefits and Features
● High DC/AC Accuracy Provides Better Measurement
Quality
• 16-Bit Resolution with No Missing Codes
• 250ksps Throughput Rates Without Pipeline Delay/
Latency
• 92.2dB SNR and -106.5dB THD at 10kHz
• 0.5 LSBRMS Transition Noise
• ±0.8 LSB INL (typ) and ±0.3 LSB DNL (typ)
● Highly Integrated ADC Saves Cost and Space
• ±7ppm/°C Internal Reference
• Internal Reference Buffer
● Flexible and Low Power Supply Saves Space and
Cost
• +5V Analog and +2.3V to +5V Digital Supply
• 31mW Power Consumption at 250ksps
• 10µA in Shutdown Mode
● Multi-Industry Standard Serial Interface and Small
Package Reduces Size
• SPI/QSPI™/MICROWIRE®/DSP-Compatible
• 3mm x 5mm, Tiny 10-Pin µMAX Package
µMAX is a registered trademark of Maxim Integrated Products, Inc.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corporation.
14-Bit to 18-Bit SAR ADC Family
±5V Input
Internal
Reference
0 to 5V Input
Internal
Reference
0 to 5V Input
External
Reference
14-BIT
500ksps
16-BIT
250ksps
16-BIT
18-BIT
500ksps 500ksps
MAX11167 MAX11166 MAX11156
MAX11169 MAX11168 MAX11158
MAX11161 MAX11160 MAX11150
MAX11165 MAX11164 MAX11154
MAX11262 MAX11163 MAX11162 MAX11152
19-7631; Rev 0; 5/15



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MAX11161 pdf
MAX11161
16-Bit, 250ksps, +5V SAR ADC with
Internal Reference in µMAX
Absolute Maximum Ratings
VDD to GND.............................................................-0.3V to +6V
OVDD to GND.........-0.3V to the lower of (VDD + 0.3V) and +6V
AIN+ to GND..........................................................................±7V
AIN-, REF,to GND..................-0.3V to the lower of (VDD + 0.3V)
.................................................................................... and +6V
SCLK, SDI, SDO, CNVST
to GND.................-0.3V to the lower of (VDD + 0.3V) and +6V
Maximum Current into Any Pin...........................................50mA
Continuous Power Dissipation (TA = +70°C)
µMAX (derate 8.8mW/°C above +70°C)......................707mW
Operating Temperature Range............................ -40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow)........................................+260°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.
Package Thermal Characteristics (Note 1)
µMAX
Junction-to-Ambient Thermal Resistance (θJA)..........113°C/W
Junction-to-Case Thermal Resistance (θJC)................36°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(VDD = 4.75V to 5.25V, VOVDD = 2.3V to 5.25V, fSAMPLE = 250ksps; TA = TMIN to TMAX, unless otherwise noted. Typical values are
at TA = +25°C.) (Note 2)
PARAMETER
ANALOG INPUT (Note 3)
SYMBOL
CONDITIONS
Input Voltage Range
AIN+ to AIN-, k = 5/4.096
Absolute Input Voltage Range
Input Leakage Current
Input Capacitance
Input-Clamp Protection Current
STATIC PERFORMANCE (Note 4)
Resolution
No Missing Codes
Offset Error
Offset Temperature Coefficient
Gain Error
Gain Error Temperature Coefficient
Integral Nonlinearity
Differential Nonlinearity
AIN+ to GND
AIN- to GND
Acquisition phase
Both inputs
N
VOVDD ≤ 3.6V
VOVDD > 3.6V
VOVDD ≤ 3.6V
VOVDD > 3.6V
INL
DNL
VOVDD ≤ 3.6V
VOVDD > 3.6V
Guaranteed by design
MIN TYP MAX UNITS
0
+VREF
xk
-0.1 +5.1
-0.1 +0.1
-10 +0.001 +10
32
-20 +20
V
V
µA
pF
mA
16
16
-3.5
-5.0
-5.0
-5.0
-1.45
-1.65
-1.0
±0.9
±0.002
±0.003
±0.8
±0.3
+3.5
+5.0
+5.0
+5.0
+1.45
+1.65
+1
Bits
Bits
LSB
LSB/°C
LSB
LSB/°C
LSB
LSB
www.maximintegrated.com
Maxim Integrated 2



Part Number MAX11161
Description SAR ADC
Maker Maxim Integrated - Maxim Integrated
Total Page 26 Pages
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