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
10Ω
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
