ML2264CCR MICRO-LINEAR [Micro Linear Corporation], ML2264CCR Datasheet

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ML2264CCR

Manufacturer Part Number
ML2264CCR
Description
4-Channel High-Speed 8-Bit A/D Converter with T/H (S/H)
Manufacturer
MICRO-LINEAR [Micro Linear Corporation]
Datasheet

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Quantity
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Part Number:
ML2264CCR
Manufacturer:
ML
Quantity:
20 000
A IN 1
A IN 2
A IN 3
A IN 4
GENERAL DESCRIPTION
The ML2264 is a high-speed, µP compatible, 4-channel
8-bit A/D converter with a conversion time of 680ns over
the operating temperature range and supply voltage
tolerance. The ML2264 operates from a single 5V supply
and has an analog input range from GND to V
The ML2264 has two different pin selectable modes. The
T/H mode has an internal track and hold. The S/H mode
has a true internal sample and hold and can digitize 0 to
5V sinusoidal signals as high as 500kHz.
The ML2264 digital interface has been designed so that
the device appears as a memory location or I/O port to a
µP. Analog input channels are selected by the latched and
decoded multiplexer address inputs.
The ML2264 is an enhanced, pin compatible second
source for the industry standard AD7824. The ML2264
enhancements are faster conversion time, parameters
guaranteed over the supply tolerance and temperature
range, improved digital interface timing, superior power
supply rejection, and better latchup immunity on analog
inputs.
BLOCK DIAGRAM
4-CH
MUX
A0
ADDRESS
DECODE
LATCH
A1
SAMPLE
HOLD
&
V
CC
+
+V
+V
–V
–V
+V
–V
+V
16
REF
REF
REF
REF
REF
16
REF
REF
SH/TH
FLASH
FLASH
(MSB)
INT
4-BIT
4-BIT
4-BIT
(LSB)
D/A
A/D
A/D
CONTROL
CS WR/RDY RD SH/TH MODE
TIMING
–V
REF
&
GND
DECODE
OUTPUT
CC
LOGIC,
BUFFER
LATCH
THREE
STATE
.
&
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
A/D Converter with T/H (S/H)
4-Channel High-Speed 8-Bit
MODE
A IN 4
A IN 3
A IN 2
A IN 1
GND
FEATURES
PIN CONNECTIONS
DB0
DB1
DB2
DB3
INT
RD
Conversion time, WR-RD mode over temperature and
supply voltage tolerance
Total unadjusted error ..................... ±1/2 LSB or ±1 LSB
Capable of digitizing a 5V, 250kHz sine wave
4-analog input channels
No missing codes
0V to 5V analog input range with single 5V power
supply
No zero or full scale adjust required
Analog input protection ............................... 25mA min
Operates ratiometrically or with up to 5V voltage
reference
No external clock required
Power-on reset circuitry
Low power ....................................................... 100mW
Narrow 24-pin DIP, SOIC, or SSOP
Superior pin compatible replacement for AD7824
Track & Hold Mode ................................. 830ns max
Sample & Hold Mode .............................. 700ns max
24-Pin DIP
10
11
12
TOP VIEW
1
2
3
4
5
6
7
8
9
*This Part Is End Of Life As Of August 1, 2000
24
23
22
21
20
19
18
17
16
15
14
13
V
SH/TH
A0
A1
DB7
DB6
DB5
DB4
CS
WR/RDY
+V
–V
CC
REF
REF
MODE
A IN 4
A IN 3
A IN 2
A IN 1
GND
DB0
DB1
DB2
DB3
INT
RD
10
11
12
24-Pin SOIC
24-Pin SSOP
1
2
3
4
5
6
7
8
9
TOP VIEW
ML2264*
24
23
22
21
20
19
18
17
16
15
14
13
May 1997
V
SH/TH
A0
A1
DB7
DB6
DB5
DB4
CS
WR/RDY
+V
–V
CC
REF
REF
1

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ML2264CCR Summary of contents

Page 1

GENERAL DESCRIPTION The ML2264 is a high-speed, µP compatible, 4-channel 8-bit A/D converter with a conversion time of 680ns over the operating temperature range and supply voltage tolerance. The ML2264 operates from a single 5V supply and has an analog ...

Page 2

... Pin has internal pulldown current source to GND Positive supply. +5 volts ± 5%. CC OPERATING CONDITIONS Supply Voltage Temperature Range (Note 3) ................. T ML2264CCS ML2264CCP ML2264CCR ........................................... 0°C to +70° the device is in sample and hold CC ............................ 4. ...

Page 3

ELECTRICAL CHARACTERISTICS Unless otherwise specified MIN PARAMETER NOTES Converter Total Unadjusted Error ML2264CXX 4, 6 Integral Linearity Error ML2264CXX 4, 6 Differential Linearity Error ML2264CXX 4 Full Scale Error ML2264CXX 4 Zero Scale Error ML2264CXX 4 ...

Page 4

ML2264 ELECTRICAL CHARACTERISTICS Unless otherwise specified MIN C = 100pF. (Note 1) L PARAMETER NOTES Digital and DC (Continued Logical “1” 4 OUT(1) Output Voltage V , Logical “0” 4 OUT(0) Output Voltage I ...

Page 5

ELECTRICAL CHARACTERISTICS Unless otherwise specified MIN C = 100pF. (Note 1) L PARAMETER NOTES AC and Dynamic Performance (Note 9) (Continued Multiplexer Address 4 AH Hold Time t , Multiplexer Address 4 AS Setup ...

Page 6

ML2264 ELECTRICAL CHARACTERISTICS Unless otherwise specified MIN C = 100pF. (Note 1) L PARAMETER NOTES AC Performance Write-Read Mode (Pin 5 = 5V) Figures 5 and 6 (Continued Internal Comparison 4, 9 INTL Time ...

Page 7

ADDR A0, A1 VALID Mode (Pin 5 = GND) Figure 1. Analog Multiplexer Address Timing for Track & Hold Mode (Pin 23 = GND) CS A0, A1 Figure 2. Analog Multiplexer Address Timing ...

Page 8

ML2264 CS t CSH t RDPW RD t CSS t RDD RDY WITH EXTERNAL PULL-UP t RDY INT t CRD VALID DB0–DB7 DATA t ACC0 *In SAMPLE & HOLD mode a pull up resistor on RDY should not be used ...

Page 9

FUNCTIONAL DESCRIPTION The ML2264 uses a two stage flash technique for A/D conversion. This technique first performs a 4 bit flash conversion determine the 4 MSB’s. These 4 IN MSB’s are then cycled through an internal ...

Page 10

ML2264 the MSB comparators will be tracking it as long as the slew rate of the analog input is slow enough so that the MSB comparators can respond. The ML2264 can track and hold signals with slew rates as high ...

Page 11

S/H Mode WR (a) T/H Mode WR 1.4 REFERENCE The +V and –V inputs are the reference voltages that REF REF determine the full scale and zero input voltages, respectively, for the A/D converter. Thus, +V the analog input ...

Page 12

ML2264 1.6 DYNAMIC PERFORMANCE 1.6.1 Sinusoidal Inputs Since the ML2264 has an internal sample and hold, the device can digitize high frequency sinusoids with little or no signal degradations. Using the Nyquist criteria, the highest frequency input to the converter ...

Page 13

log V 1 where V is the rms amplitude of the fundamental and are the rms amplitudes of the individual 2 ...

Page 14

ML2264 2.0 TYPICAL APPLICATIONS +15V – ML2264 * –15V DC *NO PROTECTION REQUIRED IF INPUT CURRENT <25mA Figure 12. Protecting the Input ML2264 REF –V ...

Page 15

TYPICAL APPLICATIONS ML2264 ANALOG SOURCES Figure 19. Operating with a Ratiometric Analog Signal of 15 (Continued) DB7 DATA DB0 INT DB7 ...

Page 16

ML2264 PHYSICAL DIMENSIONS 24 PIN 0.070 MIN (1.77 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) 0.600 - 0.614 (15.24 - 15.60) 24 PIN 0.024 - 0.034 0.050 BSC (0.61 - ...

Page 17

... PART NUMBER UNADJUSTED ERROR ML2264CCP (Obsolete) ML2264CCS (End Of Life) ML2264CCR (Obsolete) © 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; 5,546,017; ...

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