ADC161S626_09 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – 16-Bit, 50 to 250 kSPS, Differential Input, MicroPower ADC

ADC161S626
May 14, 2009
16-Bit, 50 to 250 kSPS, Differential Input, MicroPower ADC
General Description
The ADC161S626 is a 16-bit successive-approximation reg-
ister (SAR) Analog-to-Digital converter (ADC) with a maxi-
mum sampling rate of 250 kSPS. The ADC161S626 has a
minimum signal span accuracy of ± 0.003% over the temper-
ate range of −40°C to +85°C. The converter features a differ-
ential 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 +4.5V to +5.5V and V_IO can range from +2.7V to +5.5V.
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 +5V while interfacing with a +3.3V con-
troller. The serial data output is binary 2's complement and is
SPI™ compatible.
The performance of the ADC161S626 is guaranteed over
temperature at clock rates of 1 MHz to 5 MHz and reference
voltages of +2.5V to +5.5V. The ADC161S626 is available in
a small 10-lead MSOP package. The high accuracy, differ-
ential 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.
Applications
■ ^{Direct Sensor Interface}
■ ^{I/O Modules}
■ ^{Data Acquisition}
■ ^{Portable Systems}
■ ^{Motor Control}
■ ^{Medical Instruments}
■ ^{Instrumentation and Control Systems}
Features
■ ^{16-bit resolution with no missing codes}
■ ^{Guaranteed performance from 50 to 250 kSPS}
■ ^{±0.003% signal span accuracy}
■ ^{Separate Digital Input/Output Supply}
■ ^{True differential input}
■ ^{External voltage reference range of +0.5V to V}_A
■ ^{Zero-Power Track Mode with 0 µsec wake-up delay}
■ ^{Wide input common-mode voltage range of 0V to V}_A
■ ^{SPI™/QSPI™/MICROWIRE™ compatible Serial}
Interface
■ ^{Operating temperature range of −40°C to +85°C}
■ ^{Small MSOP-10 package}
Key Specifications
■ ^{Conversion Rate}
■ ^DNL
■ ^INL
■ ^{Offset Error Temp Drift}
■ ^{Gain Error Temp Drift}
■ ^SNR
■ ^THD
■ ^{Power Consumption}
■ — ^{10 kSPS, 5V}
— 200 kSPS, 5V
— 250 kSPS, 5V
— Power-Down, 5V
50 kSPS to 250 kSPS
+ 0.8 / − 0.5 LSB
± 0.8 LSB
2.5 µV/°C
0.3 ppm/°C
93.2 dBc
− 104 dBc
0.24 mW
5.3 mW
5.8 mW
10 µW
Typical Application
TRI-STATE® is a trademark of National Semiconductor Corporation.
MICROWIRE™ is a trademark of National Semiconductor Corporation.
QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2009 National Semiconductor Corporation 300734
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