ADC122S051_15 Datasheet, PDF (1/28 Pages) Texas Instruments – 2 Channel, 200 ksps to 500 ksps 12-Bit A/D Converter

ADC122S051
www.ti.com
SNAS257E – NOVEMBER 2004 – REVISED MARCH 2013
ADC122S051/ADC122S051Q 2 Channel, 200 ksps to 500 ksps 12-Bit A/D Converter
Check for Samples: ADC122S051
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
• Tested per AEC-Q100 and Qualified for
Automotive Applications
• Meets AEC-Q100-011 C2 CDM Classification
APPLICATIONS
• Portable Systems
• Remote Data Acquisition
• Instrumentation and Control Systems
KEY SPECIFICATIONS
• DNL: +0.7 / −0.4 LSB (typ)
• INL: ± 0.50 LSB (typ)
• SNR: 72.5 dB (typ)
• Power Consumption:
– 3V Supply: 3.0 mW (typ)
– 5V Supply: 10 mW (typ)
DESCRIPTION
The ADC122S051/ADC122S051Q 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
ADC122S051/ADC122S051Q is fully specified over a
sample rate range of 200 ksps to 500 ksps. 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 ADC122S051/ADC122S051Q operates with a
single supply that can range from +2.7V to +5.25V.
Normal power consumption using a +3V or +5V
supply is 3.0 mW and 10 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 ADC122S051/ADC122S051Q is packaged in an
8-lead VSSOP package. Operation over the industrial
temperature range of −40°C to +85°C is specified.
Table 1. Pin-Compatible Alternatives by Resolution and Speed⁽¹⁾
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) All devices are fully pin and function compatible.
Connection Diagram
CS
V_A
GND
IN2
1
8
2
7
ADC122S051
3
6
4
5
SCLK
DOUT
DIN
IN1
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.
Copyright © 2004–2013, Texas Instruments Incorporated