ADC122S101_14 Datasheet, PDF (1/25 Pages) Texas Instruments – 2 Channel, 500 ksps to 1 Msps 12-Bit A/D Converter

ADC122S101
www.ti.com
SNAS286C – MARCH 2005 – REVISED JANUARY 2010
ADC122S101 2 Channel, 500 ksps to 1 Msps 12-Bit A/D Converter
Check for Samples: ADC122S101
FEATURES
1
•2 Specified over a range of sample rates.
• Two input channels
• Variable power management
• Single power supply with 2.7V - 5.25V range
APPLICATIONS
• Portable Systems
• Remote Data Acquisition
• Instrumentation and Control Systems
DESCRIPTION
The ADC122S101 is a low-power, two-channel CMOS 12-bit analog-to-digital converter with a high-speed serial
interface. Unlike the conventional practice of specifying performance at a single sample rate only, the
ADC122S101 is fully specified over a sample rate range of 500 ksps to 1 Msps. The converter is based on a
successive-approximation register architecture with an internal track-and-hold circuit. It can be configured to
accept one or two input signals at inputs IN1 and IN2.
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 ADC122S101 operates with a single supply that can range from +2.7V to +5.25V. Normal power
consumption using a +3V or +5V supply is 4.3 mW and 13.1 mW, respectively. The power-down feature reduces
the power consumption to just 0.14 µW using a +3V supply, or 0.32 µW using a +5V supply.
The ADC122S101 is packaged in an 8-lead MSOP package. Operation over the industrial temperature range of
−40°C to +85°C is guaranteed.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DNL
INL
SNR
Power Consumption
Table 1. Key Specifications
3V Supply
5V Supply
VALUE
+0.9 / −0.6
± 0.64
72.4
4.3
13.1
UNIT
LSB (typ)
LSB (typ)
dB (typ)
mW (typ)
mW (typ)
Table 2. Pin-Compatible Alternatives by Resolution and SpeedAll devices are fully pin and function
compatible.
Resolution
12-bit
10-bit
8-bit
50 to 200 ksps
ADC122S021
ADC102S021
ADC082S021
Specified for Sample Rate Range of:
200 to 500 ksps
ADC122S051
ADC102S051
ADC082S051
500 ksps to 1 Msps
ADC122S101
ADC102S101
ADC082S101
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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