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Issue A

ML145053

10-Bit A/D Converter With

Serial Interface

CMOS

Legacy Device: Motorola MC145053

This ratiometric 10-bit ADC has a serial interface port to provide commu-

nication with MCUs and MPUs. Either a 10- or 16-bit format can be used.

The16-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 exter-

nal trimming required. Reference voltages down to 4.0 V are accommodated.

The ML145053 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: TA – 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

Serial DataPorts

• 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

MICROWIRE is a trademark of National Semiconductor Corp.

MUX OUT

10–BIT RC DAC

WITH SAMPLE AND HOLD

MUX ADDRESS

REGISTER

DATA REGISTER

DIGITAL CONTROL

LOGIC

ANALOG

MUX

INTERNAL

TEST

VOLTAGES

AN0

AN1

AN2

AN3

AN4

AN5

2

3

4

5

6

12

11

10

13

1

AN6

AN7

Din

Dout

CS

SCLK

EOC

SUCCESSIVE APPROXIMATION

REGISTER

AUTO–ZEROED

COMPARATOR

PIN 14 = VDD

PIN 7 = VSS

Vref

VAG

98

P DIP 14 = CP

PLASTIC

CASE 646

SOG 14 = -5P

SOG

CASE 751A

CROSS REFERENCE/ORDERING INFORMATION

MOTOROLA

P DIP 14

MC145053P

ML145053CP

SOG 14

MC145053D

ML145053-5P

LANSDALE

PACKAGE

Note: Lansdale lead free (Pb) product, as it

becomes available, will be identified by a part

number prefix change from

ML to MLE.

PIN ASSIGNMENT

EOC

AN0

AN1

AN2

AN3

AN4

VSS

1

2

3

4

5

6

7

14

13

12

11

10

9

8

VDD

SCLK

Din

Dout

CS

Vref

VAG