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PDF MAX1359B Data sheet ( Hoja de datos )
| Número de pieza | MAX1359B | |
| Descripción | Data-Acquisition System | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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DataSheet.in
19-3710; Rev 2; 8/10
16-Bit, Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
General Description
The MAX1359B smart data-acquisition systems (DAS) is
based on a 16-bit, sigma-delta analog-to-digital converter
(ADC) and system-support functionality for a micro-
processor (µP)-based system. This device integrates
an ADC, DAC, two operational amplifiers, internal
1.25V/2.048V/2.5V selectable reference, temperature
sensors, analog switches, a 32kHz oscillator, a real-
time clock (RTC) with alarm, a high-frequency-locked
loop (FLL) clock, four user-programmable I/Os, an
interrupt generator, and 1.8V and 2.7V voltage monitors
in a single chip.
The MAX1359B has dual 10:1 differential input multi-
plexers (muxes) that accept signal levels from 0 to
AVDD. An on-chip 1x to 8x programmable-gain amplifi-
er (PGA) measures low-level signals and reduces exter-
nal circuitry required.
The MAX1359B operates from a single +1.8V to +3.6V
supply and consumes only 1.4mA in normal mode and
only 6.1µA in sleep mode.
The serial interface is compatible with either SPI™/QSPI™
or MICROWIRE™, and is used to power up, configure,
and check the status of all functional blocks.
The MAX1359B is available in a space-saving 40-pin
TQFN package and is specified over the commercial
(0°C to +70°C) and the extended (-40°C to +85°C) tem-
perature ranges.
Applications
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Medical Instruments
Industrial Control
Data-Acquisition Systems
Features
o +1.8V to +3.6V Single-Supply Operation
o Multichannel 16-Bit Sigma-Delta ADC
10sps to 512sps Programmable Conversion Rate
Self and System Offset and Gain Calibration
PGA with Gains of 1, 2, 4, or 8
Unipolar and Bipolar Modes
10-Input Differential Multiplexer
o 10-Bit Force-Sense DAC
o Uncommitted Op Amps
o Dual SPDT Analog Switches
o 1.25V, 2.048V, or 2.5V Selectable Voltage
Reference
o Internal Charge Pump
o System Support
Real Time Clock and Alarm Register
Internal/External Temperature Sensor
Internal Oscillator with Clock Output
User-Programmable I/O and Interrupt Generator
VDD Monitors
o SPI/QSPI/MICROWIRE, 4-Wire Serial Interface
o Space-Saving (6mm x 6mm x 0.8mm) 40-Pin TQFN
Package
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1359BETL+
-40°C to +85°C 40 TQFN-EP**
MAX1359BCTL+
0°C to +70°C 40 TQFN-EP**
**EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration
30 29 28 27 26 25 24 23 22 21
AIN2 31
AIN1 32
REF 33
REG 34
CF- 35
CF+ 36
CPOUT 37
DVDD 38
DGND 39
UPIO1 40
MAX1359B
20 OUT1
19 SNC2
18 SCM2
17 SNO2
16 SNC1
15 SCM1
14 SNO1
13 32KIN
12 32KOUT
11 RESET
1 2 3 4 5 6 7 8 9 10
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
TQFN
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
DataSheet.in
16-Bit, Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = +1.8V to +3.6V, VREF = +1.25V, external reference, fCLK32K = 32.768kHz (external clock), CREG = 10µF, CCPOUT =
10µF, 10µF between CF+ and CF-, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Long-Term Stability
(Note 9)
35 ppm/
1000hrs
Output Noise Voltage
Turn-On Settling Time
f = 0.1Hz to 10Hz, AVDD = 3V
f = 10Hz to 10kHz, AVDD = 3V
Buffer only, settle to 0.1% of final value
50
µVP-P
400
100 µs
TEMPERATURE SENSOR
Temperature Measurement
Resolution
ADC resolution is 16-bit, 10sps
0.11 °C/LSB
Internal Temperature-Sensor
Measurement Error
External Temperature-Sensor
Measurement Error (Note 10)
Temperature Measurement Noise
TA = 0°C to +70°C
TA = -40°C to +85°C
TA = +32°C to +43°C
TA = +10°C to +50°C
TA = 0°C to +70°C
TA = -40°C to +85°C
±0.5
±1
±0.50
±0.5
±0.5
±1
0.18
°C
°C
°CRMS
Temperature Measurement
Power-Supply Rejection Ratio
0.2 °C/V
OP AMP (RL = 10kΩ connected to AVDD / 2)
Input Offset Voltage
VOS
Offset-Error Tempco
Input Bias Current (Note 7)
IBIAS
Input Offset Current
IOS
VCM = 0.5V
TA = -40°C to +85°C
IN1+, IN2+
TA = 0°C to +70°C
TA = 0°C to +50°C
TA = -40°C to +85°C
IN1-, IN2-
TA = 0°C to +70°C
TA = 0°C to +50°C
VIN1_, IN2_ = +0.3V to (AVDD - 0.3V) (Note 7)
3
0.006
4
2
0.025
20
±15
±1
±300
±200
±1
±600
±400
±1
mV
µV/oC
nA
pA
nA
pA
nA
Input Common-Mode Voltage
Range
CMVR
0
AVDD -
V
0.35
Common-Mode Rejection Ratio
CMRR
0 ≤ VCM ≤ 75mV
75mV < VCM ≤ AVDD - 0.35V
60
60 75
dB
_______________________________________________________________________________________ 5
5 Page 
DataSheet.in
16-Bit, Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
Table 1. Output Noise (Notes 12, 13, and 14)
RATE (sps)
10
40
50
60
200
240
400
512
GAIN = 1
1.820
3.845
3.065
2.873
4.525
6.502
5.300
119.078
OUTPUT NOISE (µVRMS)
GAIN = 2
GAIN = 4
3.286
1.345
3.257
1.928
2.317
1.631
2.662
1.519
2.910
1.397
2.954
1.596
80.068
1.686
282.959
281.056
GAIN = 8
0.660
0.630
0.625
0.728
0.519
0.629
0.436
28.470
Note 12: VREF = ±1.25V, bipolar mode, VIN = 1.24912, PGA gain = 1, TA = +85°C.
Note 13: CIN = 5pF, op-amp noise is considered to be the same as the switching noise. The increase of the op amp’s noise contri-
bution is due to large input swing (0 to 3.6V).
Note 14: Assume ±3 sigma peak-to-peak variation; noise-free resolution means no code flicker at given bits’ LSB.
Table 2. Peak-to-Peak Resolution
RATE (sps)
10
40
50
60
200
240
400
512
GAIN = 1
16.7
15.6
15.9
16.0
15.4
14.8
15.1
10.6
PEAK-TO-PEAK RESOLUTION (Bits)
GAIN = 2
GAIN = 4
14.8 15.1
14.8 14.6
15.3 14.8
15.1 14.9
15.0 15.0
15.0 14.9
10.2 14.8
8.4 7.4
GAIN = 8
15.1
15.2
15.2
15.0
15.5
15.2
15.7
9.7
Table 3. Maximum External Source Impedance Without 16-Bit Gain Error
PARAMETER
0 (Note 15)
EXTERNAL CAPACITANCE (pF)
50 100 500 1000
Resistance (kΩ)
350 60 30 10
4
Note 15: 2pF parasitic capacitance is assumed, which represents pad and any other parasitic capacitance.
5000
1
______________________________________________________________________________________ 11
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