ADC161S626 Datasheet, PDF (1/33 Pages) National Semiconductor (TI) – 16-Bit, 50 to 250 kSPS, Differential Input, MicroPower ADC

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ADC161S626
SNAS468D – SEPTEMBER 2008 – REVISED DECEMBER 2014
ADC161S626 16-Bit, 50 to 250 kSPS, Differential Input, MicroPower ADC
1 Features
•1 16-bit Resolution With No Missing Codes
• Ensured Performance from 50 to 250 kSPS
• ±0.003% Signal Span Accuracy
• Separate Digital Input/Output Supply
• True Differential Input
• External Voltage Reference Range of 0.5 V to V_A
• Zero-Power Track Mode with 0-µsec Wake-up
Delay
• Wide Input Common-mode Voltage Range of 0 V
to V_A
• SPI/QSPI™/MICROWIRE™ Compatible Serial
Interface
• Operating Temperature Range of −40°C to +85°C
• Small VSSOP-10 Package
• Key Specifications
– Conversion Rate 50 to 250 kSPS
– DNL +0.8 / −0.5 LSB
– INL ±0.8 LSB
– Offset Error Temp Drift 2.5 μV/°C
– Gain Error Temp Drift 0.3 ppm/°C
– SNR 93.2 dBc
– THD − 104 dBc
– Power Consumption
– 10 kSPS, 5 V 0.24 mW
– 200 kSPS, 5 V 5.3 mW
– 250 kSPS, 5 V 5.8 mW
– Power-Down, 5 V 10 μW
3 Description
The ADC161S626 is a 16-bit successive-
approximation register (SAR) Analog-to-Digital
converter (ADC) with a maximum sampling rate of
250 kSPS. The ADC161S626 has a minimum signal
span accuracy of ±0.003% over the temperate range
of −40°C to +85°C. The converter features a
differential analog input with an excellent common-
mode signal rejection ratio of 85 dB, making the
ADC161S626 suitable for noisy environments.
The ADC161S626 operates with a single analog
supply (V_A) and a separate digital input/output (V_IO)
supply. V_A can range from 4.5 V to 5.5 V and V_IO can
range from 2.7 V to 5.5 V. This allows a system
designer to maximize performance and minimize
power consumption by operating the analog portion of
the ADC at a V_A of 5 V while interfacing with a 3.3-V
controller. The serial data output is binary 2's
complement and is SPI compatible.
The performance of the ADC161S626 is ensured
over temperature at clock rates of 1 MHz to 5 MHz
and reference voltages of 2.5 V to 5.5 V. The
ADC161S626 is available in a small 10-lead VSSOP
package. The high accuracy, differential input, low
power consumption, and small size make the
ADC161S626 ideal for direct connection to bridge
sensors and transducers in battery operated systems
or remote data acquisition applications.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
ADC161S626
VSSOP (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
2 Applications
• Direct Sensor Interface
• I/O Modules
• Data Acquisition
• Portable Systems
• Motor Control
• Medical Instruments
• Instrumentation and Control Systems
Typical Application Schematic
Wide Supply
Range
VREF independent
of VA
VIO independent
of VA
VA
VREF
VIO
+IN
Fully Differential
SAR
Input
ADC
-IN
3-wire SPI
VIO
MCU
GND
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.