ADC121S021CIMF/NOPB National Semiconductor, ADC121S021CIMF/NOPB Datasheet

ADC 12BIT 1CH 50-200KSPS SOT23-6

ADC121S021CIMF/NOPB

Manufacturer Part Number
ADC121S021CIMF/NOPB
Description
ADC 12BIT 1CH 50-200KSPS SOT23-6
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheet

Specifications of ADC121S021CIMF/NOPB

Number Of Bits
12
Sampling Rate (per Second)
200k
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
7.9mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-6
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADC121S021CIMF
ADC121S021CIMFTR
© 2010 National Semiconductor Corporation
Single Channel, 50 to 200 ksps, 12-Bit A/D Converter
General Description
The ADC121S021 is a low-power, single channel CMOS 12-
bit analog-to-digital converter with a high-speed serial inter-
face. Unlike the conventional practice of specifying perfor-
mance at a single sample rate only, the ADC121S021 is fully
specified over a sample rate range of 50 ksps to 200 ksps.
The converter is based upon a successive-approximation
register architecture with an internal track-and-hold circuit.
The output serial data is straight binary, and is compatible with
several standards, such as SPI™, QSPI™, MICROWIRE,
and many common DSP serial interfaces.
The ADC121S021 operates with a single supply that can
range from +2.7V to +5.25V. Normal power consumption us-
ing a +3.6V or +5.25V supply is 1.5 mW and 7.9 mW, respec-
tively. The power-down feature reduces the power consump-
tion to as low as 2.6 µW using a +5.25V supply.
The ADC121S021 is packaged in 6-lead LLP and SOT-23
packages. Operation over the industrial temperature range of
−40°C to +85°C is guaranteed.
Pin-Compatible Alternatives by Resolution and Speed
All devices are fully pin and function compatible.
Connection Diagram
Ordering Information
TRI-STATE
ADC121S021CISD
ADC121S021CISDX
ADC121S021CIMF
ADC121S021CIMFX
ADC121S021EVAL
®
is a registered trademark of National Semiconductor Corporation.
Resolution
Order Code
12-bit
10-bit
8-bit
50 to 200 ksps
ADC121S021
ADC101S021
ADC081S021
Temperature Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
201451
ADC121S021
Specified for Sample Rate Range of:
200 to 500 ksps
Features
Key Specifications
Applications
ADC121S051
ADC101S051
ADC081S051
6-Lead SOT-23 Package, Tape & Reel
6-Lead LLP Package, Tape and Reel
Specified over a range of sample rates.
6-lead LLP and SOT-23 packages
Variable power management
Single power supply with 2.7V - 5.25V range
SPI™/QSPI™/MICROWIRE/DSP compatible
DNL
INL
SNR
Power Consumption
— 3.6V Supply
— 5.25V Supply
Portable Systems
Remote Data Acquisition
Instrumentation and Control Systems
SOT-23 Evaluation Board
6-Lead SOT-23 Package
6-Lead LLP Package
Description
20145105
500 ksps to 1 Msps
ADC121S101
ADC101S101
ADC081S101
+0.45 / -0.25 LSB (typ)
+0.45 / -0.4 LSB (typ)
January 13, 2010
www.national.com
Top Mark
72.3 dB (typ)
1.5 mW (typ)
7.9 mW (typ)
X07C
X07C
X7C
X7C

Related parts for ADC121S021CIMF/NOPB

ADC121S021CIMF/NOPB Summary of contents

Page 1

... Connection Diagram Ordering Information Order Code ADC121S021CISD ADC121S021CISDX ADC121S021CIMF ADC121S021CIMFX ADC121S021EVAL TRI-STATE ® registered trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation ADC121S021 Features ■ Specified over a range of sample rates. ■ 6-lead LLP and SOT-23 packages ■ Variable power management ■ ...

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Block Diagram Pin Descriptions and Equivalent Circuits Pin No. Symbol ANALOG I Analog input. This signal can range from DIGITAL I/O 4 SCLK Digital clock input. This clock directly controls the conversion and readout ...

Page 3

... Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Analog Supply Voltage V A Voltage on Any Digital Pin to GND Voltage on Any Analog Pin to GND Input Current at Any Pin (Note 3) Package Input Current ...

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Symbol Parameter FPBW -3 dB Full Power Bandwidth ANALOG INPUT CHARACTERISTICS V Input Range Leakage Current DCL C Input Capacitance INA DIGITAL INPUT CHARACTERISTICS V Input High Voltage IH V Input Low Voltage IL I Input Current ...

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Symbol Parameter t Aperture Delay AD t Aperture Jitter AJ ADC121S021 Timing Specifications The following specifications apply for ksps to 200 ksps, Boldface limits apply for T SAMPLE Symbol Parameter t Minimum CS Pulse Width CS ...

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Timing Diagrams www.national.com FIGURE 1. Timing Test Circuit FIGURE 2. ADC121S021 Serial Timing Diagram 6 20145108 20145106 ...

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Specification Definitions ACQUISITION TIME is the time required to acquire the input voltage. That is time required for the hold capacitor to charge up to the input voltage. Acquisition time is measured backwards from the falling edge of ...

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Typical Performance Characteristics MHz to 4 MHz 100 kHz unless otherwise stated. SCLK IN DNL MHz SCLK DNL MHz SCLK DNL vs. Clock Frequency www.national.com T = +25°C, f ...

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SNR vs. Clock Frequency 20145163 SFDR vs. Clock Frequency 20145167 Spectral Response 5. MHz SCLK 20145170 SINAD vs. Clock Frequency THD vs. Clock Frequency Power Consumption vs. Throughput MHz SCLK ...

Page 10

Applications Information 1.0 ADC121S021 OPERATION The ADC121S021 is a successive-approximation analog-to- digital converter designed around a charge-redistribution dig- ital-to-analog converter core. Simplified schematics of the ADC121S021 in both track and hold modes are shown in Figure 3 and Figure 4, ...

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... TYPICAL APPLICATION CIRCUIT A typical application of the ADC is shown in is provided in this example by the National Semiconductor LP2950 low-dropout voltage regulator, available in a variety of fixed and adjustable output voltages. The power supply pin is bypassed with a capacitor network located close to the ADC ...

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ANALOG INPUTS An equivalent circuit for the ADC's input is shown in 7. Diodes D1 and D2 provide ESD protection for the analog inputs time should the analog input go beyond (V 300 mV) or (GND − ...

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To exit shutdown mode, bring CS back low. Upon bringing CS low, the ADC will begin powering up (power-up time is specified in the Timing Specifications table). This power-up delay results in the first conversion result being unusable. The second ...

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Physical Dimensions Order Number ADC121S021CISD or ADC121S021CISDX www.national.com inches (millimeters) unless otherwise noted 6-Lead LLP NS Package Number SDB06A 6-Lead SOT-23 Order Number ADC121S021CIMF, ADC121S021CIMFX NS Package Number MF06A 14 ...

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Notes 15 www.national.com ...

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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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