adc161s626cimmx National Semiconductor Corporation, adc161s626cimmx Datasheet

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adc161s626cimmx

Manufacturer Part Number
adc161s626cimmx
Description
16-bit, 50 To 250 Ksps, Differential Input, Micropower Adc
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2008 National Semiconductor Corporation
ADC161S626
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
and a separate digital input/output (V
from +4.5V to +5.5V and V
This allows a system designer to maximize performance and
minimize power consumption by operating the analog portion
of the ADC at a V
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
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.
Direct Sensor Interface
I/O Modules
Data Acquisition
Portable Systems
Motor Control
Medical Instruments
Instrumentation and Control Systems
A
of +5V while interfacing with a +3.3V con-
IO
can range from +2.7V to +5.5V.
IO
) supply. V
300734
A
can range
A
)
Features
Key Specifications
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
Zero-Power Track Mode with 0 µsec wake-up delay
Wide input common-mode voltage range of 0V to V
SPI™/QSPI™/MICROWIRE™ compatible Serial
Interface
Operating temperature range of −40°C to +85°C
Small MSOP-10 package
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
30073482
50 kSPS to 250 kSPS
September 19, 2008
+ 0.8 / − 0.5 LSB
www.national.com
0.3 ppm/°C
A
− 104 dBc
± 0.8 LSB
2.5 µV/°C
0.24 mW
93.2 dBc
5.3 mW
5.8 mW
10 µW
A

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adc161s626cimmx Summary of contents

Page 1

... Motor Control ■ Medical Instruments ■ Instrumentation and Control Systems Typical Application TRI-STATE® trademark of National Semiconductor Corporation. MICROWIRE™ trademark of National Semiconductor Corporation. QSPI™ and SPI™ are trademarks of Motorola, Inc. © 2008 National Semiconductor Corporation Features ■ ...

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... Ordering Information Order Code Temperature Range ADC161S626CIMM −40°C to +85°C ADC161S626CIMMX −40°C to +85°C ADC161S626EB Block Diagram Connection Diagram www.national.com Description 10-Lead MSOP Package, 1000 Units Tape & Reel 10-Lead MSOP Package, 3500 Units Tape & Reel Evaluation Board Pin Descriptions Pin No ...

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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Analog Supply Voltage V A Digital I/O Supply Voltage V IO Voltage on Any Analog Input Pin to GND ...

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Symbol Parameter ANALOG INPUT CHARACTERISTICS V Differential Input Range IN I Analog Input Current INA C Input Capacitance (+IN or −IN) INA CMRR Common Mode Rejection Ratio DIGITAL INPUT CHARACTERISTICS V Input High Voltage IH V Input Low Voltage IL ...

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Symbol Parameter Power Consumption, Power Down PWR (PD) Mode (CS high) PSRR Power Supply Rejection Ratio AC ELECTRICAL CHARACTERISTICS f Maximum Clock Frequency SCLK f Maximum Sample Rate S t Acquisition/Track Time ACQ t Conversion/Hold Time CONV t Aperture Delay ...

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Timing Diagrams FIGURE 1. ADC161S626 Single Conversion Timing Diagram FIGURE 2. Timing Test Circuit FIGURE 3. D Rise and Fall Times OUT FIGURE 4. D Hold and Access Times OUT www.national.com FIGURE 5. Valid CS Assertion Times 30073408 30073406 FIGURE ...

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Specification Definitions APERTURE DELAY is the time between the first falling edge of SCLK and the time when the input signal is sampled for conversion. COMMON MODE REJECTION RATIO (CMRR measure of how well in-phase signals common to ...

Page 8

Typical Performance Characteristics +25°C, and kHz unless otherwise stated. IN DNL - 250 kSPS DNL vs. V DNL vs. V www.national.com 30073421 A 30073423 REF 30073418 8 = +5V, f ...

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Typical Performance Characteristics +25°C, and kHz unless otherwise stated. IN DNL vs. SCLK FREQUENCY DNL vs. TEMPERATURE SINAD vs +5V REF SCLK INL vs. SCLK FREQUENCY ...

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Typical Performance Characteristics +25°C, and kHz unless otherwise stated. IN SINAD vs. V SINAD vs. SCLK FREQUENCY SINAD vs. INPUT FREQUENCY www.national.com REF 30073437 30073441 30073449 10 = +5V, f ...

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Typical Performance Characteristics +25°C, and kHz unless otherwise stated. IN SINAD vs. TEMPERATURE V CURRENT vs CURRENT vs. TEMPERATURE +5V REF 30073472 V CURRENT ...

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Typical Performance Characteristics +25°C, and kHz unless otherwise stated CURRENT vs. SCLK FREQUENCY REF V CURRENT vs CURRENT vs. TEMPERATURE IO www.national.com +5V ...

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Functional Description The ADC161S626 is a 16-bit, 50 kSPS to 250 kSPS sampling Analog-to-Digital (A/D) converter. The converter uses a suc- cessive approximation register (SAR) architecture based up- on capacitive redistribution containing an inherent sample- and-hold function. The differential nature ...

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Both inputs should be biased at a common mode voltage (V ), which will be thoroughly discussed in Section 2.3. Fig- CM ure 8 shows the ADC161S626 being driven by a full-scale differential source. FIGURE 8. Differential Input 2.2 Single-Ended ...

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FIGURE 12. Analog Input CMRR vs. Frequency 2.5 Noise The noise floor of the ADC161S626 is very low as shown in Figure 13 and Figure 14. These figures were created by driv- ing the ADC input with a low-noise voltage ...

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SERIAL DIGITAL INTERFACE The ADC161S626 communicates via a synchronous 3-wire serial interface as shown in Figure 1 or re-shown in Figure 16 for convenience. CS, chip select bar, initiates conversions and frames the serial data transfers. SCLK (serial clock) ...

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Applications Information OPERATING CONDITIONS We recommend that the following conditions be observed for operation of the ADC161S626: ≤ ≤ −40°C T +85°C A ≤ ≤ +4.5V V +5.5V A ≤ ≤ +2.7V V +5.5V IO ≤ ≤ +0.5V V +5.5V ...

Page 18

LM4120 and LM4140 series reference families are excellent choices for a reference source. 6.3 PCB Layout Capacitive coupling between the noisy digital circuitry and the sensitive analog circuitry can lead to poor performance. The solution ...

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The application in Figure 19 is limited because of the single-ended configuration of the differential FIGURE 18. Differential Application for a Bridge Sensor FIGURE 19. Single-Ended Application for a Bridge ...

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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Lead MSOP Order Number ADC161S626CIMM NS Package Number MUB10A 20 ...

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Notes 21 www.national.com ...

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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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