ADC121S705 Datasheet, PDF (1/31 Pages) Texas Instruments – 12-Bit, 500 kSPS to 1 MSPS, Differential Input, Micro Power A/D Converter

ADC121S705
www.ti.com
SNAS355B – DECEMBER 2006 – REVISED MARCH 2013
ADC121S705 12-Bit, 500 kSPS to 1 MSPS, Differential Input, Micro Power A/D Converter
Check for Samples: ADC121S705
FEATURES
1
•2 True Differential Inputs
• Ensured performance from 500 kSPS to 1
MSPS
• External Reference
• Wide Input Common-Mode Voltage Range
• SPI™/QSPI™/MICROWIRE/DSP Compatible
Serial Interface
APPLICATIONS
• Automotive Navigation
• Portable Systems
• Medical Instruments
• Instrumentation and Control Systems
• Motor Control
• Direct Sensor Interface
KEY SPECIFICATIONS
• Conversion Rate: 500 kSPS to 1 MSPS
• INL: ± 0.95 LSB (Max)
• DNL: ±0.95 LSB (Max)
• Offset Error: ±3.0 LSB (Max)
• Gain Error: ±6.5 LSB (Max)
• SINAD: 69.5 db (Min)
• Power Consumption at V_A = 5V
– Active, 1 MSPS: 11.5 mW (Typ)
– Active, 500 kSPS: 9.0 mW (Typ)
– Power-Down: 1.5 µW (Typ)
DESCRIPTION
The ADC121S705 is a 12-bit, 500 kSPS to 1 MSPS
sampling Analog-to-Digital (A/D) converter that
features a fully differential, high impedance analog
input and an external reference. The reference
voltage can be varied from 1.0V to V_A, with a
corresponding resolution between 244µV and V_A
divided by 4096.
The output serial data is binary 2's complement and
is compatible with several standards, such as SPI™,
QSPI™, MICROWIRE, and many common DSP
serial interfaces. The differential input, low power
consumption, and small size make the ADC121S705
ideal for direct connection to transducers in battery
operated systems or remote data acquisition
applications.
Operating from a single 5V supply, the supply current
when operating at 1 MSPS is typically 2.3 mA. The
supply current drops down to 0.3 µA typically when
the ADC121S705 enters power-down mode. The
ADC121S705 is available in the VSSOP-8 package.
Operation is ensured over the industrial temperature
range of −40°C to +105°C and clock rates of 8 MHz
to 16 MHz.
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.
Connection Diagram
V_REF
+IN
- IN
GND
1
8
2
7
ADC121S705
3
6
4
5
V_A
SCLK
D_OUT
CS
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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 © 2006–2013, Texas Instruments Incorporated