MAX1230BEEG-T Maxim Integrated, MAX1230BEEG-T Datasheet

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MAX1230BEEG-T

Manufacturer Part Number
MAX1230BEEG-T
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1230BEEG-T

Number Of Channels
16/8
Architecture
SAR
Conversion Rate
300 KSPs
Resolution
12 bit
Input Type
Single-Ended/Differential
Snr
Yes
Interface Type
SPI
Operating Supply Voltage
4.75 V to 5.25 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
4.096 V
The MAX1226/MAX1228/MAX1230 are serial 12-bit ana-
log-to-digital converters (ADCs) with an internal reference
and an internal temperature sensor. These devices fea-
ture on-chip FIFO, scan mode, internal clock mode, inter-
nal averaging, and AutoShutdown™. The maximum
sampling rate is 300ksps using an external clock. The
MAX1230 has 16 input channels, the MAX1228 has 12
input channels, and the MAX1226 has 8 input channels.
All input channels are configurable for single-ended or
differential inputs in unipolar or bipolar mode. All three
devices operate from a +5V supply and contain a 10MHz
SPI™/QSPI™/MICROWIRE™-compatible serial port.
The MAX1230 is available in 28-pin 5mm x 5mm thin
QFN with exposed pad and 24-pin QSOP packages.
The MAX1226/MAX1228 are only available in QSOP
packages. All three devices are specified over the
extended -40°C to +85°C temperature range.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-2852; Rev 5; 12/10
________________________Applications
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configurations continued at end of data sheet.
System Supervision
Data-Acquisition Systems
Industrial Control Systems
Patient Monitoring
Data Logging
Instrumentation
TOP VIEW
CNVST/AIN7
REF-/AIN6
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
________________________________________________________________ Maxim Integrated Products
1
2
3
4
5
6
7
8
General Description
+
MAX1226
QSOP
Temp Sensor, Internal Reference
16
15
14
13
12
11
10
9
12-Bit 300ksps ADCs with FIFO,
EOC
DOUT
DIN
CS
SCLK
V
GND
REF+
DD
o Internal Temperature Sensor (±0.7°C Accuracy)
o 16-Entry First-In/First-Out (FIFO)
o Analog Multiplexer with True Differential
o Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing
o Scan Mode, Internal Averaging, and Internal Clock
o Low-Power Single +5V Operation
o Internal 4.096V Reference or External Differential
o 10MHz 3-Wire SPI/QSPI/MICROWIRE-Compatible
o Space-Saving 28-Pin 5mm x 5mm Thin QFN
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad (TQFN only). Connect to GND.
Ordering Information continued at end of data sheet.
MAX1226BCEE+
MAX1226BEEE+
MAX1228BCEP+
MAX1228BEEP+
Track/Hold
Codes Over Temperature
Reference
Interface
Package
PART
16-, 12-, 8-Channel Single Ended
8-, 6-, 4-Channel True Differential
(Unipolar or Bipolar)
2.3mA at 300ksps
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
AIN9
10
1
2
3
4
5
6
7
8
9
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
+
0°C to +70°C
0°C to +70°C
MAX1228
QSOP
Pin Configurations
20
19
18
17
16
15
14
13
12
11
EOC
DOUT
DIN
CS
SCLK
V
GND
REF+
CNVST/AIN11
REF-/AIN10
DD
PIN-PACKAGE
16 QSOP
16 QSOP
20 QSOP
20 QSOP
Features
1

Related parts for MAX1230BEEG-T

MAX1230BEEG-T Summary of contents

Page 1

... System Supervision Data-Acquisition Systems Industrial Control Systems Patient Monitoring Data Logging Instrumentation AutoShutdown is a trademark of Maxim Integrated Products, Inc. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. TOP VIEW + AIN0 1 AIN1 ...

Page 2

ADCs with FIFO, Temp Sensor, Internal Reference ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD CS, SCLK, DIN, EOC, DOUT to GND.........-0. AIN0–AIN13, REF-/AIN_, CNVST/AIN_, REF+ to GND.........................................-0. Maximum Current into Any ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5V ±5 300kHz SAMPLE SCLK Typical values are +25°C.) A PARAMETER SYMBOL CONVERSION RATE Power-Up Time Acquisition Time Conversion Time t External Clock Frequency Aperture Delay Aperture Jitter ...

Page 4

ADCs with FIFO, Temp Sensor, Internal Reference ELECTRICAL CHARACTERISTICS (continued +5V ±5 300kHz SAMPLE SCLK Typical values are +25°C.) A PARAMETER SYMBOL DIGITAL INPUTS (SCLK, DIN, CS, CNVST) Input ...

Page 5

TIMING CHARACTERISTICS (Figure 1) PARAMETER SYMBOL SCLK Clock Period SCLK Duty Cycle SCLK Fall to DOUT Transition CS Rise to DOUT Disable CS Fall to DOUT Enable DIN to SCLK Rise Setup SCLK Rise to DIN Hold CS Fal l ...

Page 6

ADCs with FIFO, Temp Sensor, Internal Reference (V = +5V +4.096V 4.8MHz REF SCLK SFDR vs. FREQUENCY 120 100 0 100 1000 FREQUENCY (kHz) SHUTDOWN ...

Page 7

V = +4.096V 4.8MHz REF SCLK INTERNAL REFERENCE VOLTAGE vs. TEMPERATURE 4.051 4.050 4.049 4.048 4.047 -40 - TEMPERATURE (°C) GAIN ERROR vs. SUPPLY VOLTAGE 0.5 0 -0.5 -1.0 -1.5 ...

Page 8

ADCs with FIFO, Temp Sensor, Internal Reference MAX1230 MAX1230 MAX1228 MAX1226 TQFN QSOP 1, 17, — — 19, 25 2–12, 26, 1–14 — 27, 28 — — 1–10 — — — — — — 11 — ...

Page 9

CS t CSS0 SCLK DIN t DOE DOUT Figure 1. Detailed Serial-Interface Timing Diagram CS DIN SCLK CNVST AIN1 AIN2 AIN15 REF- REF+ Figure 2. Functional Diagram Detailed Description The MAX1226/MAX1228/MAX1230 are low-power, seri- al-output, multichannel ...

Page 10

ADCs with FIFO, Temp Sensor, Internal Reference Converter Operation The MAX1226/MAX1228/MAX1230 ADCs use a fully dif- ferential, successive-approximation register (SAR) con- version technique and an on-chip T/H block to convert temperature and voltage signals into a 12-bit digital ...

Page 11

REF AIN0-AIN15 DAC GND (SINGLE ENDED); AIN0, AIN2, AIN4…AIN14 CIN+ (DIFFERENTIAL) HOLD GND CIN- (SINGLE ENDED); AIN1, AIN3, AIN5…AIN15 HOLD (DIFFERENTIAL Figure 3. Equivalent Input Circuit appropriate bit of the bipolar or unipolar register. Unipolar mode sets ...

Page 12

ADCs with FIFO, Temp Sensor, Internal Reference Conversion Time Calculations The conversion time for each scan is based on a num- ber of different factors: conversion time per sample, samples per result, results per scan temperature ...

Page 13

Table 2. Conversion Register* BIT BIT FUNCTION NAME — 7 (MSB) Set select conversion register. CHSEL3 6 Analog input channel select. CHSEL2 5 Analog input channel select. CHSEL1 4 Analog input channel select. CHSEL0 3 Analog input ...

Page 14

ADCs with FIFO, Temp Sensor, Internal Reference Table 3. Setup Register* BIT NAME BIT — 7 (MSB) Set to zero to select setup register. — 6 Set select setup register. Clock mode and CNVST configuration. ...

Page 15

Write to the reset register (as shown in Table 7) to clear the FIFO or to reset all registers to their default states. Set the RESET bit reset the FIFO. Set the reset bit to zero to ...

Page 16

ADCs with FIFO, Temp Sensor, Internal Reference Table 6. Averaging Register* BIT NAME BIT — 7 (MSB) Set to zero to select averaging register. — 6 Set to zero to select averaging register. — 5 Set to 1 ...

Page 17

Internally Timed Acquisitions and Conversions Using CNVST Performing Conversions in Clock Mode 00 In clock mode 00, the wake up, acquisition, conversion, and shutdown sequences are initiated through CNVST and performed automatically using the internal oscilla- tor. Results are added ...

Page 18

ADCs with FIFO, Temp Sensor, Internal Reference CNVST (ACQUISITION1) (ACQUISITION2) CS (CONVERSION1) SCLK DOUT EOC REQUEST MULTIPLE CONVERSIONS BY SETTING CNVST LOW FOR EACH CONVERSION. Figure 5. Clock Mode 01 (CONVERSION BYTE) DIN CS SCLK DOUT EOC THE ...

Page 19

DIN (ACQUISITION1) CS SCLK DOUT EOC EXTERNALLY TIMED ACQUISITION, SAMPLING AND CONVERSION WITHOUT CNVST. Figure 7. Clock Mode 11 Initiate a conversion by writing a byte to the conversion register followed by 16 SCLK cycles pulsed high ...

Page 20

ADCs with FIFO, Temp Sensor, Internal Reference OUTPUT CODE FULL-SCALE TRANSITION 111 110 101 011 010 00 . ...

Page 21

Total Harmonic Distortion Total harmonic distortion (THD) is the ratio of the RMS sum of the first five harmonics of the input signal to the fundamental itself. This is expressed as: ⎛ THD = 20 x log ...

Page 22

... ADCs with FIFO, Temp Sensor, Internal Reference Ordering Information (continued) PART TEMP RANGE MAX1230BCEG+ 0°C to +70°C MAX1230BEEG+ -40°C to +85°C MAX1230BCTI+ 0°C to +70°C MAX1230BETI+ -40°C to +85°C + Denotes a lead(Pb)-free/RoHS-compliant package. Chip Information PROCESS: BiCMOS 22 ______________________________________________________________________________________ For the latest package outline information and land patterns PIN-PACKAGE (footprints www ...

Page 23

... 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 ____________________ 23 © 2010 Maxim Integrated Products ...

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