19-3710; Rev 1; 8/05
16-Bit Data-Acquisition Systems with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
General Description
The MAX1358/MAX1359/MAX1360 smart data-acquisition
systems (DAS) are each based on a 16-bit, sigma-delta
analog-to-digital converter (ADC) and system-support
functionality for a microprocessor (µP)-based system.
These devices integrate an ADC, DACs, operational
amplifiers, internal 1.25V/2.048V/2.5V selectable refer-
ence, temperature sensors, analog switches, a 32kHz
oscillator, a real-time clock (RTC) with alarm, a high-fre-
quency-locked loop (FLL) clock, four user-programma-
ble I/Os, an interrupt generator, and 1.8V and 2.7V
voltage monitors in a single chip.
The MAX1358/MAX1359/MAX1360 have dual 10:1 dif-
ferential input multiplexers (muxes) that accept signal
levels from 0 to AV
DD
. An on-chip 1x to 8x programma-
ble-gain amplifier (PGA) measures low-level signals
and reduces external circuitry required.
The MAX1358/MAX1359/MAX1360 operate from a sin-
gle +1.8V to +3.6V supply and consume only 1.4mA in
normal mode and only 6.1µA in sleep mode.
The MAX1358 has two DACs with one uncommitted op
amp; the MAX1359 has one DAC with two uncommit-
ted op amps; and the MAX1360 has three uncommit-
ted op amps.
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 MAX1358/MAX1359/MAX1360 are available in a
space-saving 40-pin TQFN package and are specified
over the commercial (0°C to +70°C) and the extended
(-40°C to +85°C) temperature ranges.
Features
♦
+1.8V to +3.6V Single-Supply Operation
♦
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
♦
10-Bit Force-Sense DACs
♦
Uncommitted Op Amps
♦
Dual SPDT Analog Switches
♦
1.25V, 2.048V, or 2.5V Selectable Voltage
Reference
♦
Internal Charge Pump
♦
System Support
Real Time Clock and Alarm Register
Internal/External Temperature Sensor
Internal Oscillator with Clock Output
User-Programmable I/O and Interrupt Generator
V
DD
Monitors
♦
SPI/QSPI/MICROWIRE, 4-Wire Serial Interface
♦
Space-Saving (6mm x 6mm x 0.8mm) 40-Pin TQFN
Package
MAX1358/MAX1359/MAX1360
Ordering Information
PART
MAX1358AETL*
MAX1358BETL
MAX1358ACTL*
MAX1358BCTL*
MAX1359AETL*
MAX1359BETL
MAX1359ACTL*
MAX1359BCTL
MAX1360AETL*
MAX1360BETL*
MAX1360ACTL*
MAX1360BCTL*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
PIN-
PACKAGE
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
40 TQFN-EP**
PKG
CODE
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
T4066-4
Applications
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Medical Instruments
Industrial Control
Data-Acquisition Systems
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configurations appear at end of data sheet.
*Future
product—contact factory for availability.
**EP
= Exposed pad.
Selector Guide
PART
MAX1358
MAX1359
MAX1360
DACs
2
1
0
OP AMPs
1
2
3
SPDT/SPST
SWITCHES
2/2
2/1
2/0
EXTERNAL ADC
INPUTS
2
2
2
UPIOs
4
4
4
________________________________________________________________
Maxim Integrated Products
1
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.
16-Bit Data-Acquisition Systems with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
MAX1358/MAX1359/MAX1360
ABSOLUTE MAXIMUM RATINGS
AV
DD
to AGND .........................................................-0.3V to +4V
DV
DD
to DGND.........................................................-0.3V to +4V
AV
DD
to DV
DD
............................................................-4V to +4V
AGND to DGND.....................................................-0.3V to +0.3V
CLK32K to DGND ....................................-0.3V to (DV
DD
+ 0.3V)
UPIO_ to DGND........................................................-0.3V to +4V
Digital Inputs to DGND ............................................-0.3V to +4V
Analog Inputs to AGND ...........................-0.3V to (AV
DD
+ 0.3V)
Digital Output to DGND…........................-0.3V to (DV
DD
+ 0.3V)
Analog Outputs to AGND.........................-0.3V to (AV
DD
+ 0.3V)
Continuous Current Into Any Pin.........................................50mA
Continuous Power Dissipation (T
A
= +70°C)
40-Pin TQFN (derate 25.6mW/°C above +70°C) ....2051.3mW
Operating Temperature Range
MAX13_ _ CTL ....................................................0°C to +70°C
MAX13_ _ ETL .................................................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(AV
DD
= DV
DD
= +1.8V to +3.6V, V
REF
= +1.25V, external reference, CLK32K = 32.768kHz (external clock), C
REG
= 10µF, C
CPOUT
=
10µF, 10µF between CF+ and CF-, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
ADC DC ACCURACY
Noise-Free Resolution
Conversion Rate
Output Noise
Integral Nonlinearity
Unipolar Offset Error or Bipolar
Zero Error (Note 3)
Unipolar Offset-Error or Bipolar
Zero-Error Temperature Drift
(Note 4)
Gain Error (Notes 3, 5)
Gain-Error Temperature
Coefficient
DC Positive Power-Supply
Rejection Ratio
ADC ANALOG INPUTS (AIN1, AIN2)
DC Input Common-Mode
Rejection Ratio
CMRR
PGA gain = 1, unipolar mode
85
dB
PSRR
INL
Data rate = 10sps, PGA gain = 2;
data rate = 10sps to 60sps, PGA gain = 1;
no missing codes, Table 1 (Note 2)
No missing codes, Table 1
No missing codes
Unipolar mode, AV
DD
= 3V, data
rate = 40sps, PGA gain = 1,
T
A
= +25°C
Uncalibrated
Data rate = 10sps, PGA gain = 1, calibrated
Bipolar
Unipolar
Uncalibrated
Data rate = 10sps, PGA = 1, calibrated
(Notes 4, 6)
PGA gain = 1, unipolar mode, measured by
full-scale error with AV
DD
= 1.8V to 3.6V
±2.0
µV/°C
±10
±0.6
±0.003
±1.0
73
% FSR
ppm/
°C
dB
A grade
B grade
±0.004
±1.0
±0.003
16
10
Table 1
±0.003
512
Bits
sps
µV
RMS
%FSR
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
%FSR
2
_______________________________________________________________________________________
16-Bit Data-Acquisition Systems with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +1.8V to +3.6V, V
REF
= +1.25V, external reference, CLK32K = 32.768kHz (external clock), C
REG
= 10µF, C
CPOUT
=
10µF, 10µF between CF+ and CF-, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Normal-Mode 60Hz Rejection
Ratio
Normal-Mode 50Hz Rejection
Ratio
Absolute Input Range
Unipolar mode
Differential Input Range
Bipolar mode
ADC not in measurement mode, mux
enabled, T
A
≤
+55°C, inputs = +0.1V to
(AV
DD
- 0.1V)
T
A
= +85°C
Input Sampling Capacitance
Input Sampling Rate
External Source Impedance at
Input
C
IN
f
SAMPLE
See Table 3
5
21.84
Table 3
-V
REF
/
Gain
V
REF
/
Gain
±1
±5
pF
kHz
kΩ
SYMBOL
CONDITIONS
Data rate = 10sps or 60sps, PGA gain = 1,
unipolar mode (Note 2)
Data rate = 10sps or 50sps, PGA gain = 1,
unipolar mode (Note 2)
MIN
100
100
AGND
-0.05 /
Gain
AV
DD
V
REF
/
Gain
V
TYP
MAX
UNITS
dB
dB
V
MAX1358/MAX1359/MAX1360
DC Input Current (Note 7)
nA
FORCE-SENSE DAC (MAX1358/MAX1359 only, R
L
= 10kΩ and C
L
= 200pF, FBA = OUTA and FBB = OUTB, unless otherwise
noted)
Resolution
Differential Nonlinearity
Integral Nonlinearity
Offset Error
Offset-Error Tempco
Gain Error
Gain-Error Tempco
Input Leakage Current at SWA/B
Input Leakage Current at FBA/B
DAC Output Buffer Leakage
Current
Input Common-Mode Voltage
Line Regulation
Load Regulation
Output Voltage Range
Excludes offset and voltage reference error
Excludes offset and reference drift
SWA/B switches open (Notes 7, 8)
V
FBA/B
= +0.3V to
(AV
DD
- 0.3V)
(Note 7)
T
A
= -40°C to +85°C
T
A
= 0°C to +70°C
T
A
= 0°C to +50°C
±1
±1
±1
±600
±400
±75
0
40
AGND
AV
DD
-
0.35
175
0.5
AV
DD
DNL
INL
Guaranteed monotonic
Code 3D hex to 3FF hex
Code 3D hex to 3FF
hex
A grade
B grade
±4.4
±5
10
±1
±2
±4
±20
Bits
LSB
LSB
mV
µV/°C
LSB
ppm/°C
nA
nA
pA
nA
V
µV/V
µV/µA
V
Reference to code 52 hex
DAC buffer disabled (Note 7)
At FBA and FBB
AV
DD
= +1.8V to +3.6V
I
OUT
=
±2mA,
C
L
= 1000pF (Note 2)
_______________________________________________________________________________________
3
16-Bit Data-Acquisition Systems with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
MAX1358/MAX1359/MAX1360
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +1.8V to +3.6V, V
REF
= +1.25V, external reference, CLK32K = 32.768kHz (external clock), C
REG
= 10µF, C
CPOUT
=
10µF, 10µF between CF+ and CF-, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Slew Rate
Output-Voltage Settling Time
SYMBOL
CONDITIONS
52 hex to 3FF hex code swing rising or
falling, R
L
= 10kΩ, C
L
= 100pF
10% to 90% rising or falling to
±0.5
LSB
Referred to FBA/B,
excludes reference noise
OUTA/B shorted to AGND
OUTA/B shorted to AV
DD
Between SWA and OUTA, or SWB and
OUTB, HFCK enabled
HFCK enabled
Excluding reference
AGND
DAC on, internal REF and ADC off
Internal REF, DAC, and ADC off (Note 7)
A grade
B grade
A grade
B grade
A grade
B grade
V
REF
= 1.25V
Output-Voltage Temperature
Coefficient (Note 7)
TC
A grade
B grade
Output Short-Circuit Current
Line Regulation
I
RSC
REF shorted to AGND
REF shorted to AV
DD
T
A
= +25°C
A grade
B grade
I
SOURCE
= 0
to 500µA
I
SINK
= 0 to
50µA
25
1.2
µV/µA
1.7
V
REF
=
2.048V, 2.5V
15
18
90
100
mA
µA
µV/V
1.237
1.213
2.027
1.987
2.475
2.425
1.25
1.25
2.048
2.048
2.5
2.5
15
2.5
100
1.263
1.288
2.068
2.109
2.525
2.575
50
65
ppm/
o
C
V
100
18
AV
DD
f = 0.1Hz to
10Hz
f = 10Hz to
10kHz
MIN
TYP
40
65
80
µV
P-P
200
20
15
150
mA
Ω
ns
µs
V
MΩ
nA
MAX
UNITS
V/ms
µs
Input Voltage Noise
Output Short-Circuit Current
Input-Output SWA/SWB Switch
Resistance
SWA/SWB Switch Turn-On/Off
Time
Power-On Time
EXTERNAL REFERENCE (REF)
Input Voltage Range
Input Resistance
DC Input Leakage Current
INTERNAL VOLTAGE REFERENCE (C
REF
= 4.7µF)
AV
DD
≥
+1.8V, T
A
= +25°C
Reference Output Voltage
V
REF
AV
DD
≥
+2.2V, T
A
= +25°C
AV
DD
≥
+2.7V, T
A
= +25°C
Load Regulation
T
A
= +25°C, V
REF
= 1.25V
4
_______________________________________________________________________________________
16-Bit Data-Acquisition Systems with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +1.8V to +3.6V, V
REF
= +1.25V, external reference, CLK32K = 32.768kHz (external clock), C
REG
= 10µF, C
CPOUT
=
10µF, 10µF between CF+ and CF-, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Long-Term Stability
Output Noise Voltage
Turn-On Settling Time
TEMPERATURE SENSOR
Temperature Measurement
Resolution
ADC resolution is 16-bit, 10sps
A grade
Internal Temperature-Sensor
Measurement Error
B grade
T
A
= 0°C to +70°C
T
A
= -40 C to +85°C
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= +25°C
A grade
External Temperature-Sensor
Measurement Error (Note 10)
B grade
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= +32°C to +43°C
T
A
= +10°C to +50°C
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
Temperature Measurement Noise
Temperature Measurement
Power-Supply Rejection Ratio
OP AMP (R
L
= 10kΩ connected to AV
DD
/ 2)
Input Offset Voltage
Offset-Error Tempco
T
A
= -40°C to +85°C
IN1+, IN2+, IN3+
Input Bias Current (Note 7)
I
BIAS
IN1-, IN2-, IN3-
Input Offset Current
Input Common-Mode Voltage
Range
Common-Mode Rejection Ratio
I
OS
CMVR
CMRR
0
≤
V
CM
≤
75mV
75mV < V
CM
≤
AV
DD
- 0.35V
60
T
A
= 0°C to +70°C
T
A
= 0°C to +50°C
T
A
= -40°C to +85°C
T
A
= 0°C to +70°C
T
A
= 0°C to +50°C
V
IN1_
,
IN2_
= +0.3V to (AV
DD
- 0.3V) (Note 7)
0
60
75
V
OS
V
CM
= 0.5V
3
0.006
4
2
0.025
20
±1
±300
±200
±1
±600
±400
±1
AV
DD
-
0.35
±15
mV
µV/
o
C
nA
pA
nA
pA
nA
V
dB
±0.50
±0.5
±0.5
±1
0.18
0.2
°C
RMS
°C/V
o
MAX1358/MAX1359/MAX1360
SYMBOL
(Note 9)
CONDITIONS
MIN
TYP
35
50
400
100
MAX
UNITS
ppm/
1000hrs
µV
P-P
µs
f = 0.1Hz to 10Hz, AV
DD
= 3V
f = 10Hz to 10kHz, AV
DD
= 3V
Buffer only, settle to 0.1% of final value
0.11
±0.5
±1
±0.5
±1
±0.50
±1
±2
°C/LSB
°C
°C
_______________________________________________________________________________________
5
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