ML2283CCP Micro Linear, ML2283CCP Datasheet

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ML2283CCP

Manufacturer Part Number
ML2283CCP
Description
serial i/o 8 bit A/D converters
Manufacturer
Micro Linear
Datasheet

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ML2283CCP
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GENERAL DESCRIPTION
The ML2280 and ML2283 are 8-bit successive
approximation A/D converters with serial I/O and
configurable input multiplexers with up to 4 input
channels.
All errors of the sample-and-hold incorporated on the
ML2280 and ML2283 are accounted for in the analog-to-
digital converters accuracy specification.
The voltage reference can be externally set to any value
between GND and V
over a relatively small voltage span if desired.
The ML2283 is an enhanced double polysilicon, CMOS,
pin-compatible second source for the ADC0833 A/D
converter. All parameters are guaranteed over temperature
with a power supply voltage of 5V ±10%.
BLOCK DIAGRAM
V
V
IN+
IN–
A/D WITH SAMPLE & HOLD FUNCTION
8pF
8pF
+
COMP
+
CC
ML2281
, thus allowing a full conversion
APPROXIMATION
SHIFT-REGISTER
SUCCESSIVE
CONVERTER
CONTROL
REGISTER
OUTPUT
TIMING
AND
D/A
V
CC
GND
V
REF/2
CLK
Serial I/O 8-Bit A/D Converters
DO
CS
FEATURES
* This Part Is Obsolete
** This Part Is End Of Life As Of August 1, 2000
CH0
CH1
CH2
CH3
Conversion time: 6µs
ML2280 capable of digitizing a 5V, 40kHz sine wave
Total unadjusted error with external
reference: ±1/2LSB or ±1LSB
Sample-and-hold: 375ns acquisition
0 to 5V analog input range with single 5V
power supply
2.5V reference provides 0 to 5V analog input range
No zero- or full-scale adjust required
Low power: 12.5mW MAX
Analog input protection: 25mA (min) per input
Differential analog voltage inputs (ML2280)
Programmable multiplexer with differential or single
ended analog inputs (ML2283)
0.3" width 8- or 14-pin DIP, or 8-Pin SOIC (ML2280)
Superior pin-compatible replacement for ADC0833
MULTIPLEXER
4-CHANNEL
2-CHANNEL
DIFF
S.E.
OR
4-BIT
ML2280*,
AGND
CONTROL
TIMING
ML2283
SAMPLE & HOLD
SHIFT-REGISTER
SHIFT-REGISTER
AND
CONVERTER
V
FUNCTION
REF/2
OUTPUT
INPUT
WITH
A/D
ML2283**
V
CC
REGULATOR
SHUNT
V+
May 1997
DGND
SARS
CLK
DO
CS
DI
SE
1

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ML2283CCP Summary of contents

Page 1

GENERAL DESCRIPTION The ML2280 and ML2283 are 8-bit successive approximation A/D converters with serial I/O and configurable input multiplexers with input channels. All errors of the sample-and-hold incorporated on the ML2280 and ML2283 are accounted for in ...

Page 2

ML2280, ML2283 PIN CONFIGURATION ML2280 Single Differential Input 8-Pin PDIP CLK – GND 4 5 REF/2 TOP VIEW PIN DESCRIPTION NAME FUNCTION V Positive ...

Page 3

ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Current into V+ ...................................................... 15mA Supply Voltage, V ................................................. ...

Page 4

ML2280, ML2283 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS CONVERTER AND MULTIPLEXER CHARACTERISTICS (Continued) I Off Channel On channel = V OFF Leakage Current Off channel = 0V (Notes channel = 0V Off channel = V (Notes 4, 8) ...

Page 5

ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER AC ELECTRICAL CHARACTERISTICS f Clock Frequency CLK t Sample-and-Hold Acquisition ACQ t Conversion Time C SNR Signal to Noise Ratio ML2280 THD Total Harmonic Distortion ML2280 IMD Intermodulation Distortion ML2280 Clock Duty Cycle CS Falling Edge ...

Page 6

ML2280, ML2283 DATA OUTPUT DATA OUTPUT C L Figure 1. High Impedance Test Circuits and Waveforms Data Input Timing CLK t SET- HOLD DATA IN (DI) CLK ...

Page 7

CLOCK (CLK) CHIP SELECT (CS) DATA OUT (DO) SAMPLE & HOLD ACQUISITION (t ) ACQ CLOCK (CLK) t SET-UP CHIP SELECT (CS) ADDRESS MUX START SELECT ODD/SIGN BIT DATA IN (DI) SGL/DIF SELECT BIT 1 SAR ...

Page 8

ML2280, ML2283 1 0.75 0.5 125 C – 0. REF ( Figure 4. Linearity Error 1 REF 0.75 0.5 125 C –55 C ...

Page 9

DI 5-BIT SHIFT-REGISTER ODD/ START SGL/DIF SELECT 1 SIGN 16 CLK MUX V CC ADDRESS 3 CH0* 4 CH1 ANALOG 5 CH2* (EQUIVALENT) 6 CH3 REF INTERNAL ...

Page 10

ML2280, ML2283 FUNCTIONAL DESCRIPTION MULTIPLEXER ADDRESSING The design of these converters utilizes a sample data comparator structure which provides for a differential analog input to be converted by a successive approximation routine. The actual voltage converted is always the difference ...

Page 11

When the start bit has been shifted into the start location of the MUX register, the input channel has been assigned and a conversion is about to begin. An interval of 1/2 clock period is used for sample & hold ...

Page 12

ML2280, ML2283 ANALOG INPUTS AND SAMPLE/HOLD An important feature of the ML2280 and ML2283 is that they can be located at the source of the analog signal and then communicate with a controlling µP with just a few wires. This ...

Page 13

SHUNT REGULATOR A unique feature of the ML2283 is the inclusion of a shunt regulator connected from V+ terminal to ground which also connects to the V terminal (which is the actual CC converter supply) through a silicon diode as ...

Page 14

ML2280, ML2283 APPLICATIONS START: LOOP 1: RRC ZERO: ONE: CONT: LOOP 2: ACALL RETI PULSE: 14 CH0 CLK P1 2 ML2283 8051 CH3 8051 Interface and Controlling Software MNEMONIC INSTRUCTION ANL ...

Page 15

APPLICATIONS (Continued 10k 0.01 F CLK 10k CLOSE TO START THE 0.001 F A/D CONVERSION CLOCK GENERATOR 51k ( PARALLEL INPUTS CLK INT CLK 2 INPUT SHIFT REGISTER CLK 1 + SHIFT/ SIN ...

Page 16

ML2280, ML2283 APPLICATIONS (Continued) V (+) V R SET ML2283 5V DC 10k V V (–) T MIN REF ADJ. Low-Cost Remote Temperature Sensor 100 ZERO ADJ. 120k XDR ...

Page 17

APPLICATIONS (Continued ( (+) 10k ML2280 ADJ (– REF SET FOR 1.5V Span Adjust STRAIN ...

Page 18

ML2280, ML2283 APPLICATIONS (Continued) ML2280 CLK – CLK START CS FSR HI START LS193 LOAD B0 COUNT DOWN 5V CLK Sampling Rate 111kHz, ...

Page 19

PHYSICAL DIMMENSIONS 0.020 MIN (0.51 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) 0.017 - 0.027 (0.43 - 0.69) (4 PLACES) 0.055 - 0.061 (1.40 - 1.55) inches (millimeters) Package: P08 8-Pin PDIP 0.365 - 0.385 (9.27 ...

Page 20

... ADC0833CCN ML2283BCP (Obs) ADC0833BCN ML2283CIP (Obs) ADC0833BCN ML2283CCP (EOL) ADC0833CCN © Micro Linear 1997 is a registered trademark of Micro Linear Corporation Products described in this document may be covered by one or more of the following patents, U.S.: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; ...

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