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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX11156

SAR ADC


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MAX11156 pdf
EVALUATION KIT AVAILABLE
MAX11156
18-Bit, 500ksps, ±5V SAR ADC
with Internal Reference in TDFN
General Description
The MAX11156 18-bit, 500ksps, SAR ADC offers excellent
AC and DC performance with true bipolar input range,
small size, and internal reference. The MAX11156 measures
a ±5V (10VP-P) input range while operating from a
single 5V supply. A patented charge-pump architecture
allows direct sampling of high-impedance sources. The
MAX11156 integrates an optional internal reference and
buffer, saving additional cost and space.
This ADC achieves 94.6dB SNR and -101.4dB THD (typ).
The MAX11156 guarantees 18-bit no-missing codes and
±2.8 LSB INL (typ).
The MAX11156 communicates using an SPI-compatible
serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial
interface can be used to daisy-chain multiple ADCs in
parallel for multichannel applications and provides a busy
indicator option for simplified system synchronization and
timing.
The MAX11156 is offered in a 12-pin, 3mm x 3mm,
TDFN package and is specified over the -40°C to +85°C
temperature range.
Applications
Data Acquisition Systems
Industrial Control Systems/Process Control
Medical Instrumentation
Automatic Test Equipment
Selector Guide and Ordering Information appear at end of
data sheet.
Typical Operating Circuit
10Ω
±5V
MAX9632
4.7nF
AIN+
AIN-
REF
10µF
1µF VDD
(5V)
18-BIT ADC
MAX11156
REF
BUF
AGNDS
1µF OVDD
(2.3V TO 5V)
INTERFACE
AND CONTROL
CONFIGURATION REGISTER
INTERNAL REFERENCE
SCLK
DIN
DOUT
CNVST
HOST
CONTROLLER
REFIO
GND 0.1µF
Benefits and Features
● High DC/AC Accuracy Improves Measurementuality
• 18-Bit Resolution with No Missing Codes
• 500ksps Throughput Rate Without Pipeline Delay/
Latency
• 94.6dB SNR and -101.4dB THD at 10kHz
• 1.6 LSBRMS Transition Noise
• ±0.5 LSB DNL (typ) and ±2.8 LSB INL (typ)
Highly Integrated ADC Saves Cost and Space
• 6ppm/°C (typ) Internal Reference
• Internal Reference Buffer
• ±5V Bipolar Analog Input Range
Wide Supply Range and Low Power Simplify
Power-Supply Design
• 5V Analog Supply
• 2.3V to 5V Digital Supply
• 25.8mW Power Consumption at 500ksps
• 10µA in Shutdown Mode
Multi-Industry Standard Serial Interface and
Small Package Reduce Size
• SPI/QSPI™/MICROWIRE®/DSP-Compatible Serial
Interface
• 3mm x 3mm Tiny 12-Pin TDFN Package
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corporation.
14-Bit to 18-Bit SAR ADC Family
14-BIT
16-BIT
500ksps 250ksps
16-BIT
500ksps
18-BIT
500ksps
±5V Input
Internal
Reference
0 to 5V Input
Internal
Reference
MAX11167 MAX11166 MAX11156
MAX11169 MAX11168 MAX11158
MAX11161 MAX11160 MAX11150
MAX11165 MAX11164 MAX11154
0 to 5V Input
External MAX11262 MAX11163 MAX11162 MAX11152
Reference
19-6622; Rev 2; 10/15



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MAX11156 pdf
MAX11156
18-Bit, 500ksps, ±5V SAR ADC
with Internal Reference in TDFN
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......................................................................... Q7V
AIN-, REF, REFIO, AGNDS
to GND................ -0.3V to the lower of (VDD + 0.3V) and +6V
SCLK, DIN, DOUT, CNVST
to GND................ -0.3V to the lower of (VDD + 0.3V) and +6V
Maximum Current into Any Pin...........................................50mA
Continuous Power Dissipation (TA = +70NC)
TDFN (derate 18.2mW/NC above +70NC)...................1349mW
Operating Temperature Range............................ -40NC to +85NC
Junction Temperature.......................................................+150NC
Storage Temperature Range............................. -65NC to +150NC
Lead Temperature (soldering, 10s).................................. +300NC
Soldering Temperature (reflow)........................................+260NC
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)
TDFN
Junction-to-Ambient Thermal Resistance (qJA)........59.3°C/W
Junction-to-Case Thermal Resistance (qJC).............22.5°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 = 500ksps, VREF = 4.096V, Reference Mode 3; TA = TMIN to TMAX, unless
otherwise noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
ANALOG INPUT (Note 3)
Input Voltage Range
Absolute Input Voltage Range
Input Leakage Current
Input Capacitance
Input-Clamp Protection Current
DC ACCURACY (Note 4)
Resolution
No Missing Codes
Offset Error
Offset Temperature Coefficient
Gain Error
SYMBOL
CONDITIONS
AIN+ to AIN-, K = 5.0/4.096
AIN+ to GND
AIN- to GND
Acquisition phase
Both inputs
N
MIN
TYP
MAX
UNITS
-K x VREF
-(VDD +
0.1)
-0.1
-10
-20
+0.001
16
+K x VREF
+(VDD +
0.1)
+0.1
+10
+20
V
V
µA
pF
mA
18 Bits
18 Bits
-15 ±2.8 +15 LSB
±0.002
LSB/°C
-10 ±3.1 +10 LSB
Gain Error Temperature
Coefficient
±0.023
LSB/°C
Integral Nonlinearity
Differential Nonlinearity
Positive Full-Scale Error
Negative Full-Scale Error
DNL Guaranteed by design
-6 ±2.8 +6 LSB
-0.9
±0.5
+0.9
LSB
-17 +17 LSB
-15 +15 LSB
www.maximintegrated.com
Maxim Integrated 2



Part Number MAX11156
Description SAR ADC
Maker Maxim Integrated - Maxim Integrated
Total Page 27 Pages
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