MAX1452EAE+ Maxim Integrated Products, MAX1452EAE+ Datasheet

IC SENSOR SIGNAL COND 16-SSOP

MAX1452EAE+

Manufacturer Part Number
MAX1452EAE+
Description
IC SENSOR SIGNAL COND 16-SSOP
Manufacturer
Maxim Integrated Products
Type
Signal Conditionerr
Datasheet

Specifications of MAX1452EAE+

Input Type
Analog
Output Type
Analog
Interface
Serial
Current - Supply
2.5mA
Mounting Type
Surface Mount
Package / Case
16-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1452 is a highly integrated analog-sensor sig-
nal processor optimized for industrial and process con-
trol applications utilizing resistive element sensors. The
MAX1452 provides amplification, calibration, and tem-
perature compensation that enables an overall perfor-
mance approaching the inherent repeatability of the
sensor. The fully analog signal path introduces no quan-
tization noise in the output signal while enabling digitally
controlled trimming with the integrated 16-bit DACs.
Offset and span are calibrated using 16-bit DACs,
allowing sensor products to be truly interchangeable.
The MAX1452 architecture includes a programmable
sensor excitation, a 16-step programmable-gain ampli-
fier (PGA), a 768-byte (6144 bits) internal EEPROM,
four 16-bit DACs, an uncommitted op amp, and an on-
chip temperature sensor. In addition to offset and span
compensation, the MAX1452 provides a unique tem-
perature compensation strategy for offset TC and
FSOTC that was developed to provide a remarkable
degree of flexibility while minimizing testing costs.
The MAX1452 is packaged for the commercial, industri-
al, and automotive temperature ranges in 16-pin SSOP/
TSSOP and 24-pin TQFN packages.
Maxim can customize the MAX1452 for high-volume
dedicated applications. Using our dedicated cell library
of more than 2000 sensor-specific functional blocks,
Maxim can quickly provide a modified MAX1452 solu-
tion. Contact Maxim for further information.
19-1829; Rev 2; 4/09
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.
Secure-Lock is a trademark of Maxim Integrated Products, Inc.
Pressure Sensors
Transducers and Transmitters
Strain Gauges
Pressure Calibrators and Controllers
Resistive Elements Sensors
Accelerometers
Humidity Sensors
4–20mA
0 to +5V (rail-to-rail)
+0.5V to +4.5V Ratiometric
+2.5V to ±2.5V
________________________________________________________________ Maxim Integrated Products
General Description
Outputs Supported
Customization
Applications
Low-Cost Precision Sensor
♦ Provides Amplification, Calibration, and
♦ Accommodates Sensor Output Sensitivities
♦ Single Pin Digital Programming
♦ No External Trim Components Required
♦ 16-Bit Offset and Span Calibration Resolution
♦ Fully Analog Signal Path
♦ On-Chip Lookup Table Supports Multipoint
♦ Supports Both Current and Voltage Bridge
♦ Fast 150µs Step Response
♦ On-Chip Uncommitted Op Amp
♦ Secure-Lock™ Prevents Data Corruption
♦ Low 2mA Current Consumption
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
** Dice are tested at T
Detailed Block Diagram and Pin Configurations appear at
the end of data sheet.
MAX1452CAE+
MAX1452EAE+
MAX1452AAE+
MAX1452AUE+
MAX1452ATG+
MAX1452C/D
Temperature Compensation
from 4mV/V to 60mV/V
Calibration Temperature Correction
Excitation
PART
Signal Conditioner
A
= +25°C, DC parameters only.
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +85°C
TEMP RANGE
Ordering Information
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
16 SSOP
16 SSOP
16 SSOP
16 TSSOP
24 TQFN-EP*
Dice**
Features
1

Related parts for MAX1452EAE+

MAX1452EAE+ Summary of contents

Page 1

... Supports Both Current and Voltage Bridge Excitation ♦ Fast 150µs Step Response ♦ On-Chip Uncommitted Op Amp ♦ Secure-Lock™ Prevents Data Corruption ♦ Low 2mA Current Consumption PART MAX1452CAE+ MAX1452EAE+ MAX1452AAE+ MAX1452AUE+ Applications MAX1452ATG+ MAX1452C/D + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. ...

Page 2

... Maximum Output-Voltage Swing 2 _______________________________________________________________________________________ Operating Temperature: MAX1452CAE+/MAX1452C/D ............................0°C to +70°C - 0.3V 0.3V) MAX1452EAE+ ................................................-40°C to +85°C DD MAX1452AAE+ ..............................................-40°C to +125°C MAX1452AUE+..............................................-40°C to +125°C MAX1452ATG+..............................................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................ +300°C ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5V 0V +25°C, unless otherwise noted.) DD DDF SS A PARAMETER SYMBOL Output-Voltage Low Output-Voltage High Output Impedance at DC ΔV Output Offset Ratio ΔOffset Output Offset TC Ratio ...

Page 4

Low-Cost Precision Sensor Signal Conditioner ELECTRICAL CHARACTERISTICS (continued +5V 0V +25°C, unless otherwise noted.) DD DDF SS A PARAMETER SYMBOL ent- S our ce Refer ence Δ R Resi ...

Page 5

T = +25°C, unless otherwise noted OFFSET DAC DNL 5.0 2.5 0 -2.5 -5.0 0 10k 20k 30k 40k 50k DAC CODE PIN SSOP/TSSOP TQFN- ...

Page 6

Low-Cost Precision Sensor Signal Conditioner PIN SSOP/TSSOP TQFN- — — Detailed Description The MAX1452 provides amplification, calibration, and temperature compensation to enable an overall ...

Page 7

GENERATOR IRO MAX1452 DAC OSCILLATOR INP ∑ PGA INM CURRENT ISRC SOURCE BDR TEMP SENSOR 8-BIT ADC TEMPERATURE V DDF INTERNAL EEPROM DIO 6144 BITS UNLOCK 416 BITS FOR USER V DD BDR AMP+ AMP- V ...

Page 8

Low-Cost Precision Sensor Signal Conditioner Linear and Nonlinear Temperature Compensation Writing 16-bit calibration coefficients into the offset TC and FSOTC registers compensates first-order tempera- ture errors. The piezoresistive sensor is powered by a current source resulting in a temperature-dependent bridge ...

Page 9

SENSOR Figure 3. Basic Nonratiometric Output Configuration Typical Nonratiometric Operating Circuit (12VDC < VPWR < 40VDC) Nonratiometric output configuration enables the sensor power to vary over a wide range. A high performance voltage reference, such as the MAX15006B, is incorpo- ...

Page 10

Low-Cost Precision Sensor Signal Conditioner BDR 6 INP MAX1452 4 SENSOR INM AMPOUT TEST Figure 4. Basic 4–20mA Output, Loop-Powered Configuration • Registers CONFIG, OTCDAC, and FSOTCDAC are refreshed from EEPROM. • ...

Page 11

Table 1. EEPROM Memory Address Map LOW-BYTE PAGE ADDRESS (hex) 000 0 03E 040 1 07E 080 2 0BE 0C0 3 0FE 100 4 13E 140 15E 160 162 164 5 166 168 16A 16C 17E 180 19E 6 1A0 ...

Page 12

Low-Cost Precision Sensor Signal Conditioner The ODAC and FSODAC are loaded from the EEPROM lookup tables using an index pointer that is a function of temperature. An ADC converts the integrated tem- perature sensor output to an 8-bit value every ...

Page 13

DRIVEN BY TESTER DIO Figure 5. DIO Output Data Format 3) Write the load internal calibration register (LdICR) command to CRIL[3:0]. When a LdICR command ...

Page 14

Low-Cost Precision Sensor Signal Conditioner DRIVEN BY TESTER DIO OUT Figure 6. Analog Output Timing The analog signal driven onto the OUT pin is deter- ...

Page 15

DIO[1:N] DIGITAL MULTIPLEXER +5V DVM Figure 7. Automated Test System Concept MAX1452 Evaluation Kit To expedite the development based transducers and test systems, Maxim has pro- duced the MAX1452 evaluation kit (EV kit). First-time users of the MAX1452 are strongly ...

Page 16

Low-Cost Precision Sensor Signal Conditioner RAW SENSOR OUTPUT T = +25° PRESSURE (kPs) COMPENSATED TRANSDUCER ERROR 0.15 FSO OFFSET 0.1 0.05 0 -0.05 -0.1 -0.15 -50 0 TEMPERATURE (°C) Figure 8. ...

Page 17

Table 3. Configuration Register (CONFIG[15:0]) FIELD NAME 15:13 OSC[2:0] Oscillator frequency setting. Factory preset, do not change Logic ‘1’ selects external R EXT 11 CLK1M EN Logic ‘1’ enables CLK1M output driver. 10 PGA Sign Logic ‘1’ inverts ...

Page 18

Low-Cost Precision Sensor Signal Conditioner Table 5. PGA Gain Setting (PGA[3:0]) PGA[3:0] 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 Table 8. EEPROM ODAC and FSODAC Lookup Table Memory Map TEMP-INDEX[7:0] 00hex ...

Page 19

Table 9. Control Location (CL[15:0]) FIELD NAME 15:8 CL[15:8] Reserved Control Location. Secure-Lock is activated by setting this to FFhex which disables DIO serial 7:0 CL[7:0] communications and connects OUT to PGA output. Table 10. IRSA Decoding IRSA[3:0] 0000 Write ...

Page 20

Low-Cost Precision Sensor Signal Conditioner Table 11. CRIL Command Codes CRIL[3:0] NAME 0000 LdICR Load internal calibration register at address given in ICRA with data from DHR[15:0]. 0001 EEPW EEPROM write of 8 data bits from DHR[7:0] to address location ...

Page 21

Table 13. IRSP Decode IRSP[3:0] 0000 DHR[7:0] 0001 DHR[15:8] 0010 IEEA[7:4], ICRA[3:0] concatenated 0011 CRIL[3:0], IRSP[3:0] concatenated 0100 ALOC[3:0], ATIM[3:0] concatenated 0101 IEEA[7:0] EEPROM address byte 0110 IEED[7:0] EEPROM data byte 0111 TEMP-Index[7:0] 1000 BitClock[7:0] 1001 Reserved. Internal flash test ...

Page 22

Low-Cost Precision Sensor Signal Conditioner Table 15. ALOC Definition ALOC[3:0] ANALOG SIGNAL 0000 OUT 0001 BDR 0010 ISRC 0011 VDD 0100 VSS 0101 BIAS5U 0110 AGND 0111 FSODAC 1000 FSOTCDAC 1001 ODAC 1010 OTCDAC 1011 VREF 1100 VPTATP 1101 VPTATM ...

Page 23

V DD ISRC R R ISRC STC 75kΩ 75kΩ 16-BIT FSOTC BDR FSOTC DAC INP PHASE V SS REVERSAL MUX MUX INM INPUT REFERRED OFFSET (COARSE OFFSET IRO (3, 2:0) OFFSET mV 1,111 63 1,110 54 ...

Page 24

Low-Cost Precision Sensor Signal Conditioner TOP VIEW + ISRC 1 OUT INM MAX1452 BDR 5 INP TEST 8 SSOP/TSSOP Chip Information SUBSTRATE CONNECTED TO ______________________________________________________________________________________ ...

Page 25

... 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 ____________________ 25 © 2009 Maxim Integrated Products ...

Related keywords