ADC128S102_15 Datasheet, PDF (1/29 Pages) Texas Instruments – 12-Bit A/D Converter

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ADC128S102
SNAS298G – AUGUST 2005 – REVISED JANUARY 2015
ADC128S102 8-Channel, 500-ksps to 1-Msps, 12-Bit A/D Converter
1 Features
•1 Eight Input Channels
• Variable Power Management
• Independent Analog and Digital Supplies
• SPI/QSPI™/MICROWIRE™/DSP Compatible
• Packaged in 16-Lead TSSOP
• Key Specifications
– Conversion Rate 500 ksps to 1 MSPS
– DNL (V_A = V_D = 5.0 V) +1.5 / −0.9
– LSB (maximum) INL (V_A = V_D = 5.0 V) ±1.2
LSB (maximum)
– Power Consumption
– 3V Supply 2.3 mW (typical)
– 5V Supply 10.7 mW (typical)
2 Applications
• Automotive Navigation
• Portable Systems
• Medical Instruments
• Mobile Communications
• Instrumentation and Control Systems
3 Description
The ADC128S102 is a low-power, eight-channel
CMOS 12-bit analog-to-digital converter specified for
conversion throughput rates 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
up to eight input signals at inputs IN0 through IN7.
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 ADC128S102 may be operated with independent
analog and digital supplies. The analog supply (V_A)
can range from +2.7 V to +5.25 V, and the digital
supply (V_D) can range from +2.7 V to V_A. Normal
power consumption using a +3-V or +5-V supply is
2.3 mW and 10.7 mW, respectively. The power-down
feature reduces the power consumption to 0.06 µW
using a +3-V supply and 0.25 µW using a +5-V
supply.
The ADC128S102 is packaged in a 16-lead TSSOP
package. Operation over the extended industrial
temperature range of −40°C to +105°C is ensured.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADC128S102
TSSOP (16)
5.00 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
VA is used as the Reference
“Analog” Supply Rail
for the ADC
VD can be set independently
of VA
“Digital” Supply Rail
VIN7
VIN3
VIN0
VA
VD
IN7
IN6
IN5
IN4
SAR
ADC
IN3
4-wire SPI
IN2
IN1
IN0
AGND
DGND
MCU
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.