MC145053 Datasheet, PDF (1/15 Pages) Motorola, Inc – 10-Bit A/D Concerter with Serial Interface

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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by MC145053/D
10ĆBit A/D Converter
with Serial Interface
CMOS
This ratiometric 10-bit ADC has a serial interface port to provide communi-
cation with MCUs and MPUs. Either a 10- or 16-bit format can be used. The
16-bit format can be one continuous 16-bit stream or two intermittent 8-bit
streams. The converter operates from a single power supply with no external
trimming required. Reference voltages down to 4.0 V are accommodated.
The MC145053 has an internal clock oscillator to operate the dynamic A/D
conversion sequence and an end-of-conversion (EOC) output.
• 5 Analog Input Channels with Internal Sample-and-Hold
• Operating Temperature Range: – 40 to 125° C
• Successive Approximation Conversion Time: 44 µs Maximum
• Maximum Sample Rate: 20.4 ks/s
• Analog Input Range with 5-Volt Supply: 0 to 5 V
• Monotonic with No Missing Codes
• Direct Interface to Motorola SPI and National MICROWIRE Serial Data
Ports
• Digital Inputs/Outputs are TTL, NMOS, and CMOS Compatible
• Low Power Consumption: 14 mW
• Chip Complexity: 1630 Elements (FETs, Capacitors, etc.)
• See Application Note AN1062 for Operation with QSPI
BLOCK DIAGRAM
MUX OUT
Vref
VAG
9
8
10-BIT RC DAC
WITH SAMPLE AND HOLD
MC145053
P SUFFIX
PLASTIC
CASE 646
D SUFFIX
SOG
CASE 751A
ORDERING INFORMATION
MC145053P Plastic DIP
MC145053D SOG Package
PIN ASSIGNMENT
EOC 1
AN0 2
AN1 3
AN2 4
AN3 5
AN4 6
VSS 7
14 VDD
13 SCLK
12 Din
11 Dout
10 CS
9 Vref
8 VAG
AN0 ²
AN1 ³
AN2 ⁴
AN3 ⁵
AN4 ⁶
ANALOG
MUX
INTERNAL AN5
TEST ^AN6
VOLTAGES ^AN7
Din
12
Dout ¹¹
CS ¹⁰
SCLK ¹³
EOC ¹
SUCCESSIVE APPROXIMATION
REGISTER
MUX ADDRESS
REGISTER
DIGITAL CONTROL
LOGIC
DATA REGISTER
MICROWIRE is a trademark of National Semiconductor Corp.
REV 2
1/99
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SOLUTIONS DEVICE DATA
PIN 14 = VDD
PIN 7 = VSS
AUTO-ZEROED
COMPARATOR
MC145053
1