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ADC128S102QML Datasheet

12-Bit A/D Converter

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ADC128S102QML
May 17, 2010
8-Channel, 50 kSPS to 1 MSPS, 12-Bit A/D Converter
General Description
The ADC128S102 is a low-power, eight-channel CMOS 12-
bit analog-to-digital converter specified for conversion
throughput rates of 50 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 (VA) can range from
+2.7V to +5.25V, and the digital supply (VD) can range from
+2.7V to VA. Normal power consumption using a +3V or +5V
supply is 2.3 mW and 10.7 mW, respectively. The power-
down feature reduces the power consumption to 0.06 µW
using a +3V supply and 0.25 µW using a +5V supply.
Features
Total Ionizing Dose
100 krad(Si)
Single Event Latch-up
120 MeV-cm2/mg
Eight input channels
Variable power management
Independent analog and digital supplies
SPI/QSPI/MICROWIRE/DSP compatible
Packaged in 16-lead Ceramic SOIC
Key Specifications
Conversion Rate
DNL (VA = VD = 5.0 V)
INL (VA = VD = 5.0 V)
Power Consumption
3V Supply
5V Supply
50 kSPS to 1 MSPS
+1.5 / −0.9 LSB (max)
+1.4 / −1.25 LSB (max)
2.3 mW (typ)
10.7 mW (typ)
Applications
Automotive Navigation
Portable Systems
Medical Instruments
Mobile Communications
Instrumentation and Control Systems
Ordering Information
NS Part Number
ADC128S102WGRQV
Flight Part
ADC128S102WGMPR
Pre-Flight Prototype
ADC128S102CVAL
Ceramic Evaluation Board
SMD Part Number
5962R0722701VZA
100 krad(Si)
Connection Diagram
NS Package Number
WG16A
WG16A
Package Description
16LD Ceramic SOIC
16LD Ceramic SOIC
16LD Ceramic SOIC
on Evaluation Board
SPIis a trademark of Motorola, Inc.
© 2010 National Semiconductor Corporation
300181
www.DataSheet.in
30018105
www.national.com


National Semiconductor Electronic Components Datasheet

ADC128S102QML Datasheet

12-Bit A/D Converter

No Preview Available !

Block Diagram
30018107
Pin Descriptions and Equivalent Circuits
Pin No.
ANALOG I/O
4 - 11
DIGITAL I/O
Symbol
IN0 to IN7
16 SCLK
15 DOUT
14 DIN
1 CS
POWER SUPPLY
2 VA
13 VD
3 AGND
12 DGND
Equivalent Circuit
Description
Analog inputs. These signals can range from 0V to VREF.
Digital clock input. The guaranteed performance range of
frequencies for this input is 0.8 MHz to 16 MHz. This clock directly
controls the conversion and readout processes.
Digital data output. The output samples are clocked out of this pin
on the falling edges of the SCLK pin.
Digital data input. The ADC128S102QML's Control Register is
loaded through this pin on rising edges of the SCLK pin.
Chip select. On the falling edge of CS, a conversion process
begins. Conversions continue as long as CS is held low.
Positive analog supply pin. This voltage is also used as the
reference voltage. This pin should be connected to a quiet +2.7V
to +5.25V source and bypassed to GND with 1 µF and 0.1 µF
monolithic ceramic capacitors located within 1 cm of the power pin.
Positive digital supply pin. This pin should be connected to a +2.7V
to VA supply, and bypassed to GND with a 0.1 µF monolithic
ceramic capacitor located within 1 cm of the power pin.
The ground return for the analog supply and signals.
The ground return for the digital supply and signals.
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Part Number ADC128S102QML
Description 12-Bit A/D Converter
Maker National Semiconductor
Total Page 22 Pages
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