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MAX1464AAI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P47
General Description
The MAX1464 is a highly integrated, low-power, low-
noise multichannel sensor signal processor optimized
for industrial, automotive, and process-control applica-
tions such as pressure sensing and compensation,
RTD and thermocouple linearization, weight sensing
and classification, and remote process monitoring with
limit indication.
The MAX1464 accepts sensors with either single-ended
or differential outputs. The MAX1464 accommodates
sensor output sensitivities from 1mV/V to 1V/V. The
MAX1464 provides amplification, calibration, signal lin-
earization, and temperature compensation that enable
an overall performance approaching the inherent
repeatability of the sensor without requiring any exter-
nal trim components.
Two 16-bit voltage-output DACs and two 12-bit PWMs
can be used to indicate each of the temperature-com-
pensated sensor signals independently, as a sum or
difference signal, or user-defined relationship between
each signal and temperature. Uncommitted op amps
are available to buffer the DAC outputs, drive heavier
external loads, or provide additional gain and filtering.
The MAX1464 incorporates a 16-bit CPU, user-pro-
grammable 4kB of FLASH program memory, 128 bytes
of FLASH user information, one 16-bit ADC, two 16-bit
DACs, two 12-bit PWM digital outputs, four rail-to-rail
op amps, one SPI™-compatible interface, two GPIOs,
and one on-chip temperature sensor.
The MAX1464 operates from a single 5.0V (typ) supply
and is packaged for automotive, industrial, and com-
mercial temperature ranges in a 28-pin SSOP package.
Applications
Pressure Sensor Signal Conditioning
Weight Measurement Systems
Thermocouple and RTD Linearization
Transducers and Transmitters
Process Indicators
Calibrators and Controllers
GMR and MR Magnetic Direction Sensors
Features
♦ Programmable Amplification, Calibration,
Linearization, and Temperature Compensation
♦ Two Differential or Four Single-Ended ADC Input
Channels
♦ Accommodates Sensor Output Sensitivities from
1mV/V to 1V/V
♦ Two DAC/PWM Output Signal Channels
♦ Supports 4–20mA Current Loop Applications
♦ 4kB of FLASH Memory for Code and Coefficients
♦ 128 Bytes of FLASH Memory for User Information
♦ Integrated Temperature Sensing
♦ Flexible Dual Op-Amp Block
♦ Programmable Sensor Input Gain and Offset
♦ Programmable Sensor Sampling Rate and
Resolution
♦ No External Trim Components Required
MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3579; Rev 0; 2/05
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.
*Dice are tested at T
A
= +25°C, DC parameters only.
Functional Diagram and Detailed Block Diagram appear at
end of data sheet.
SPI is a trademark of Motorola, Inc.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX1464CAI 0°C to +70°C 28 SSOP
MAX1464C/W* 0°C to +70°C Die
MAX1464EAI -40°C to +85°C 28 SSOP
MAX1464AAI
-40°C to +125°C
28 SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OUT2SM
AMP2M
AMP2P
OUT2LG
V
REF
INP1
V
DDF
INM1
INP2
INM2
V
SS
V
SSF
GPIO2
GPIO1
V
SS
SCLK
DI
DO
CS
CKIO
CKSEL
N.C.
V
DD
N.C.
OUT1LG
AMP1P
AMP1M
OUT1SM
SSOP
TOP VIEW
MAX1464
Pin Configuration
MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DDF
= V
DD
= 4.5V to 5.5V, V
SSF
= V
SS
= 0V, f
CLK
= 4.0MHz, T
A
= T
MIN
to T
MAX
. Typical values are at V
DDF
= V
DD
= 5.0V, V
SSF
= V
SS
= 0V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to V
SS
.............................................................-0.3V to +6.0V
V
DDF
to V
SS
...........................................................-0.3V to +6.0V
V
SSF
to V
SS
............................................................-0.3V to +0.3V
All Other Pins to V
SS
...................................-0.3V to (V
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
28-Pin SSOP (derate 9.1mW/°C above +70°C) ..........727mW
Operating Temperature Ranges
MAX1464CAI .....................................................0°C to +70°C
MAX1464C/W.....................................................0°C to +70°C
MAX1464EAI...................................................-40°C to +85°C
MAX1464AAI ................................................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
SUPPLY
Supply Voltage V
DD
V
SS
= V
SSF
= 0V 4.5 5.0 5.5 V
FLASH Supply Voltage V
DDF
V
SS
= V
SSF
= 0V 4.5 5.0 5.5 V
Base Operating Current I
BO
CPU stopped (Note 2)
575 720 890
µA
CPU Current I
CPU
All modules off, CPU = on, additive to I
BO
,
I
CPU
= I
DD
+ I
DDF
(Note 3)
540 840 1240
µA
All modules off, ADC = on, ADC clk =
1MHz, additive to I
BO
; the CPU and ADC
are not on at the same time
690 1040 1394
ADC Current (Note 3) I
ADC
All modules off, ADC = on, ADC clk = 7kHz,
additive to I
BO
; the CPU and ADC are not
on at the same time
465 765 1060
µA
DAC Current I
DACn
All modules off, DAC = on, additive to I
BO
(n = 1 or 2) (Note 4)
425 550 730
µA
Large Op-Amp Current I
OPLGn
All modules off, CPU stopped, large op
amp = on (n = 1 or 2)
430 673 1020
µA
Small Op-Amp Current I
OPSMn
All modules off, CPU stopped, small op
amp = on (n = 1 or 2)
110 190 265
µA
POWER-ON RESET
V
DDF
POR Threshold V
DD
> V
DDF
3.6 4.0 4.3 V
V
DDF
POR Hysteresis
-0.85
V
ANALOG INPUT
PGA[4:0] = 00000, CLK[2:0] = 000
430
PGA[4:0] = 01010
,
CLK[2:0] = 000 55
PGA[4:0] = 11111, CLK[2:0] = 000 36
kΩ
PGA[4:0] = 00000, CLK[2:0] = 011 3.4 MΩ
PGA[4:0] = 01010, CLK[2:0] = 011
440
PGA[4:0] = 11111, CLK[2:0] = 011
288
kΩ
PGA[4:0] = 00000, CLK[2:0] = 110 27
PGA[4:0] = 01010, CLK[2:0] = 110 3.5
Differential Input Impedance
(INP1 to INM1 and
INP2 to INM2)
R
DIN
PGA[4:0] = 11111, CLK[2:0] = 110 2.3
MΩ
MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
PGA[4:0] = 00000, CLK[2:0] = 000
430
PGA[4:0] = 01010
,
CLK[2:0] = 000 55
PGA[4:0] = 11111, CLK[2:0] = 000 36
kΩ
PGA[4:0] = 00000, CLK[2:0] = 011 3.4 MΩ
PGA[4:0] = 01010, CLK[2:0] = 011
440
PGA[4:0] = 11111, CLK[2:0] = 011
288
kΩ
PGA[4:0] = 00000, CLK[2:0] = 110 27
PGA[4:0] = 01010, CLK[2:0] = 110 3.5
Single-Sided Input Impedance
(INP1 to V
SS
, INM1 to V
SS
,
INP2 to V
SS
, INM2 to V
SS
)
R
SIN
PGA[4:0] = 11111, CLK[2:0] = 110 2.3
MΩ
Common-Mode Rejection Ratio CMRR
Common-mode voltage V
CM
= V
SS
to V
DD
0.008
%FS
Differential Signal-Gain Range Selectable in 17 steps (Note 5) 0.99 to 244 V/V
PGA[4:0] = 00000
0.95 0.99 1.05
PGA[4:0] = 00001 7.3 7.7
8.2
PGA[4:0] = 01010 71 77 82
PGA[4:0] = 10100
137 153 168
Differential Signal Gain A
VDIFF
PGA[4:0] = 11110
203 244 283
V/V
Gain-Error Temperature
Coefficient
GETC
ADC
PGA[4:0] = 00000 -8
ppm/°C
COARSE-OFFSET DAC
Resolution 3-bit plus sign 4 Bits
PGA[4:0] =
00000 to 01000
137 147 157
PGA[4:0] =
01010 to 10000
273 291 308
REF = V
DD
,
CO[3:0] = 0111
PGA[4:0] =
10100 to 11110
525 578 630
PGA[4:0] =
00000 to 01000
57 64 69
PGA[4:0] =
01010 to 10000
113 126 136
REF = V
DD
,
CO[3:0] = 0011
PGA[4:0] =
10100 to 11110
228 251 276
PGA[4:0] =
00000 to 01000
-3 -1 +1
PGA[4:0] =
01010 to 10000
-7
-2.4
+2
Effective Offset Adjustment at the
ADC Input
OA
ADC
REF = V
DD
,
CO[3:0] = 0000
PGA[4:0] =
10100 to 11110
-11 -4 +3
% of
ADC
Ref
ELECTRICAL CHARACTERISTICS (continued)
(V
DDF
= V
DD
= 4.5V to 5.5V, V
SSF
= V
SS
= 0V, f
CLK
= 4.0MHz, T
A
= T
MIN
to T
MAX
. Typical values are at V
DDF
= V
DD
= 5.0V, V
SSF
= V
SS
= 0V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P47

MAX1464AAI+T

Mfr. #:
Buy MAX1464AAI+T
Manufacturer:
Maxim Integrated
Description:
16-bit Microcontrollers - MCU Low-Pwr/Nse MultiCh Sensor Signal Prcssr
Lifecycle:
New from this manufacturer.
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