MAX1267BEEG Maxim Integrated, MAX1267BEEG Datasheet

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MAX1267BEEG

Manufacturer Part Number
MAX1267BEEG
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet
1.MAX1267BCEG-T.pdf (19 pages)

Specifications of MAX1267BEEG

Number Of Channels
2/1
Architecture
SAR
Conversion Rate
265 KSPs
Resolution
12 bit
Input Type
Single-Ended/Pseudo-Differential
Snr
Yes
Interface Type
Parallel
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QSOP-24
Maximum Power Dissipation
762 mW
Minimum Operating Temperature
- 40 C
Number Of Converters
1
Voltage Reference
Internal 2.5 V or External
The MAX1265/MAX1267 low-power, 12-bit analog-to-
digital converters (ADCs) feature a successive-approxi-
mation ADC, automatic power-down, fast wake-up
(2µs), an on-chip clock, +2.5V internal reference, and a
high-speed 12-bit parallel interface. They operate with
a single +2.7V to +3.6V analog supply.
Power consumption is only 5.4mW at the maximum
sampling rate of 265ksps. Two software-selectable
power-down modes enable the MAX1265/MAX1267 to
be shut down between conversions; accessing the par-
allel interface returns them to normal operation.
Powering down between conversions can reduce sup-
ply current below 10µA at lower sampling rates.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1265 has
six input channels and the MAX1267 has two (three
input channels and one input channel, respectively,
when in pseudo-differential mode).
Excellent dynamic performance and low power, com-
bined with ease of use and small package size, make
these converters ideal for battery-powered and data-
acquisition applications or for other circuits with demand-
ing power-consumption and space requirements. The
MAX1265 is offered in a 28-pin QSOP package, while the
MAX1267 comes in a 24-pin QSOP. For pin-compatible
+5V, 12-bit versions, refer to the MAX1266/MAX1268
data sheet.
19-2721; Rev 0; 04/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX1265ACEI
MAX1265BCEI
MAX1265AEEI
MAX1265BEEI
MAX1267ACEG
MAX1267BCEG
MAX1267AEEG
MAX1267BEEG
Industrial Control Systems
Energy Management
Data-Acquisition Systems
PART
with +2.5V Reference and Parallel Interface
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
________________________________________________________________ Maxim Integrated Products
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
General Description
PIN-PACKAGE
28 QSOP
28 QSOP
28 QSOP
28 QSOP
24 QSOP
24 QSOP
24 QSOP
24 QSOP
Data Logging
Patient Monitoring
Touch Screens
Applications
(LSB)
±0.5
±0.5
±0.5
±0.5
INL
±1
±1
±1
±1
o 12-Bit Resolution, ±0.5 LSB Linearity
o +3V Single-Supply Operation
o Internal +2.5V Reference
o Software-Configurable Analog Input Multiplexer
o Software-Configurable Unipolar/Bipolar
o Low Current
o Internal 3MHz Full-Power Bandwidth Track/Hold
o Parallel 12-Bit Interface
o Small Footprint
Typical Operating Circuits appear at end of data sheet.
Pin Configurations continued at end of data sheet.
Analog Inputs
TOP VIEW
6-Channel Single Ended/
3-Channel Pseudo Differential (MAX1265)
2-Channel Single Ended/
1-Channel Pseudo Differential (MAX1267)
1.9mA (265ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
28-Pin QSOP (MAX1265)
24-Pin QSOP (MAX1267)
CLK
INT
WR
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
RD
10
11
12
13
14
1
2
3
4
5
6
7
8
9
MAX1265
QSOP
Pin Configurations
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D10
D11
V
REF
REFADJ
GND
COM
CH0
CH1
CH2
CH3
CH4
CH5
CS
DD
Features
1

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MAX1267BEEG Summary of contents

Page 1

... MAX1267BCEG 0°C to +70°C 24 QSOP MAX1267AEEG -40°C to +85°C 24 QSOP MAX1267BEEG -40°C to +85°C 24 QSOP ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o 12-Bit Resolution, ±0.5 LSB Linearity o +3V Single-Supply Operation o Internal +2 ...

Page 2

ADCs with +2.5V Reference and Parallel Interface ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD CH0–CH5, COM to GND ............................-0. REF, REFADJ to GND.................................-0. Digital Inputs to GND ...............................................-0.3V to ...

Page 3

ADCs with +2.5V Reference and Parallel Interface ELECTRICAL CHARACTERISTICS (continued +2.7V to +3.6V, COM = GND, REFADJ = unless otherwise noted. Typical values are at T ...

Page 4

ADCs with +2.5V Reference and Parallel Interface TIMING CHARACTERISTICS (V = +2.7V to +3.6V, COM = GND, REFADJ = unless otherwise noted. Typical values are ...

Page 5

ADCs with +2.5V Reference and Parallel Interface (V = +3V +2.500V 4.8MHz REF CLK INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 ...

Page 6

ADCs with +2.5V Reference and Parallel Interface (V = +3V +2.500V 4.8MHz REF CLK INTERNAL REFERENCE VOLTAGE vs. SUPPLY VOLTAGE 2.53 2.52 2.51 2.50 2.49 2.48 3.0 3.3 2.7 3.6 ...

Page 7

ADCs with +2.5V Reference and Parallel Interface PIN NAME MAX1265 MAX1267 ...

Page 8

ADCs with +2.5V Reference and Parallel Interface PIN NAME MAX1265 MAX1267 25 21 REF D11 28 24 D10 (CH5) (CH4) ANALOG (CH3) INPUT MULTIPLEXER (CH2) CH1 CH0 COM CLK CLOCK ...

Page 9

ADCs with +2.5V Reference and Parallel Interface the analog inputs. This configuration is pseudo-differ- ential in that only the signal at IN+ is sampled. The return side (IN-) must remain stable within ±0.5 LSB (±0.1 LSB ...

Page 10

ADCs with +2.5V Reference and Parallel Interface Table 2. Channel Selection for Single-Ended Operation (SGL/DIF = ...

Page 11

ADCs with +2.5V Reference and Parallel Interface CSWS CONTROL D11–D0 BYTE ACQMOD = 0 INT RD HIGH-Z DOUT Figure 4. Conversion Timing Using Internal Acquisition Mode Together ...

Page 12

ADCs with +2.5V Reference and Parallel Interface CSWS CONTROL D11–D0 BYTE ACQMOD = 1 INT RD HIGH-Z DOUT Figure 5. Conversion Timing Using External Acquisition Mode External ...

Page 13

ADCs with +2.5V Reference and Parallel Interface CLK t CWS WR ACQMOD = 0 t ACQUISITION STARTS CWH CLK WR ACQMOD = 0 Figure 6a. External Clock and WR Timing (Internal Acquisition Mode) ACQUISITION STARTS CLK ...

Page 14

ADCs with +2.5V Reference and Parallel Interface Table 4. Control-Byte Format (MSB) PD1 PD0 ACQMOD V = +3V DD 50kΩ 330kΩ 50kΩ GND 0.01µF 4.7µF GND Figure 7. Reference Adjustment with External Potentiometer ...

Page 15

ADCs with +2.5V Reference and Parallel Interface Table 5. Full Scale and Zero Scale for Unipolar and Bipolar Operation UNIPOLAR MODE Zero scale Full scale OUTPUT CODE FULL-SCALE TRANSITION FS = REF + COM 111 . ...

Page 16

ADCs with +2.5V Reference and Parallel Interface CLK WR RD CONTROL D11– D7–D0 WORD D0 STATE ACQUISITION SAMPLING INSTANT Figure 10. Timing Diagram for Fastest Conversion SUPPLIES +3V 4.7µ ...

Page 17

ADCs with +2.5V Reference and Parallel Interface Integral Nonlinearity Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from a straight line. This straight line can be either a best-straight-line fit ...

Page 18

ADCs with +2.5V Reference and Parallel Interface CLK MAX1265 REF µP CONTROL WR REFADJ INPUTS RD INT D11 D10 CH5 D6 CH4 D5 CH3 D4 CH2 D3 CH1 D2 CH0 ...

Page 19

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________19 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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