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General Description
The MAX1177 is a 16-bit, low-power, successive-
approximation analog-to-digital converter (ADC) featur-
ing automatic power-down, a factory-trimmed internal
clock, and a byte-wide parallel interface. The device
operates from a single +4.75V to +5.25V analog supply
and features a separate digital supply input for direct
interface with +2.7V to +5.25V digital logic.
The MAX1177 accepts an analog input voltage range
from 0 to +10V. It consumes no more than 26.5mW at a
sampling rate of 135ksps when using an external refer-
ence, and 31mW when using the internal +4.096V refer-
ence. AutoShutdownTM reduces supply current to
0.4mA at 10ksps.
The MAX1177 is ideal for high-performance, battery-
powered, data-acquisition applications. Excellent AC
performance (THD = -100dB) and DC accuracy (±3
LSB INL) make this device ideal for industrial process
control, instrumentation, and medical applications.
The MAX1177 is available in a 20-pin TSSOP package
and is fully specified over the -40°C to +85°C extended
temperature range and the 0°C to +70°C commercial
temperature range.
Applications
Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
Features
o Byte-Wide Parallel Interface
o Analog Input Voltage Range: 0 to +10V
o Single +4.75V to +5.25V Analog Supply Voltage
o Interfaces with +2.7V to +5.25V Digital Logic
o ±3 LSB INL
o ±1 LSB DNL
o Low Supply Current (max)
2.9mA (External Reference)
3.8mA (Internal Reference)
5µA AutoShutdown Mode
o Small Footprint
o 20-Pin TSSOP Package
MAX1177
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
________________________________________________________________ Maxim Integrated Products
1
D0D7
OR
D8D15
µP DATA
BUS
AV
DD
DV
DD
AGND DGND
+5V ANALOG
+5V DIGITAL
ANALOG INPUT
AIN
HBEN
EOC
CS
R/C
REF
REFADJ
HIGH
BYTE
LOW
BYTE
10
µF
0.1
µF
0.1
µF
0.1
µF
MAX1177
Typical Operating Circuit
19-2597; Rev 0; 8/03
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.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1177ACUP
0
°C to +70°C
20 TSSOP
MAX1177BCUP
0
°C to +70°C
20 TSSOP
MAX1177CCUP
0
°C to +70°C
20 TSSOP
MAX1177AEUP
-40
°C to +85°C
20 TSSOP
MAX1177BEUP
-40
°C to +85°C
20 TSSOP
MAX1177CEUP
-40
°C to +85°C
20 TSSOP
Pin Configuration and Functional Diagram appear at end of
data sheet.
MAX1177
16-Bit, 135ksps, Single-Supply ADC
with to 10V Input Range
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
AV
DD
to AGND .........................................................-0.3V to +6V
DV
DD
to DGND.........................................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AIN to AGND .....................................................-16.5V to +16.5V
REF, REFADJ to AGND............................-0.3V to (AV
DD
+ 0.3V)
CS, R/C, HBEN to DGND .........................................-0.3V to +6V
D_, EOC to DGND ...................................-0.3V to (DV
DD
+ 0.3V)
Maximum Continuous Current into Any Pin ........................50mA
Continuous Power Dissipation (T
A
= +70°C)
TSSOP (derate 10.9mW/°C above +70°C) ..................879mW
Operating Temperature Ranges
MAX1177_CUP ...................................................0°C to +70°C
MAX1177_EUP ................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(AV
DD
= DV
DD
= +5V ±5%, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
Resolution
RES
16
Bits
MAX1177A
-1
+1
MAX1177B
-1.0
+1.5
Differential Nonlinearity
DNL
No missing codes
over temperature
MAX1177C
-1
+2
LSB
MAX1177A
-3
+3
MAX1177B
-3
+3
Integral Nonlinearity
INL
MAX1177C
-4
+4
LSB
RMS noise, external reference
0.6
Transition Noise
Internal reference
0.75
LSB
RMS
Offset Error
-10
0
+10
mV
Gain Error
0
±0.2
%FSR
Offset Drift
16
µV/°C
Gain Drift
±1
ppm/°C
AC ACCURACY (f
IN
= 1kHz, V
AIN
= full range, 135ksps)
Signal-to-Noise Plus Distortion
SINAD
85
90
dB
Signal-to-Noise Ratio
SNR
86
91
dB
Total Harmonic Distortion
THD
-100
-92
dB
Spurious-Free Dynamic Range
SFDR
92
103
dB
ANALOG INPUT
Input Range
V
AIN
0
10
V
Normal operation
5.3
6.9
9.2
Input Resistance
R
AIN
Shutdown mode
5.3
k
Input Current
I
AIN
0
V
AIN
+10V
-0.1
+2.0
mA
Input Capacitance
C
IN
10
pF
MAX1177
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +5V ±5%, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INTERNAL REFERENCE
REF Output Voltage
V
REF
4.056
4.096
4.136
V
REF Output Tempco
±35
ppm/°C
REF Short-Circuit Current
I
REF-SC
±10
mA
EXTERNAL REFERENCE
REF and REFADJ Input-Voltage
Range
3.8
4.2
V
REFADJ Buffer-Disable Threshold
AV
DD
-
0.4
AV
DD
-
0.1
V
Normal mode, f
SAMPLE
= 135ksps
60
100
REF Input Current
I
REF
Shutdown mode (Note 1)
±0.1
±10
µA
REFADJ Input Current
I
REFADJ
REFADJ = AV
DD
16
µA
DIGITAL INPUTS/OUTPUTS
Output High Voltage
V
OH
I
SOURCE
= 0.5mA, DV
DD
= +2.7V to +5.25V,
AV
DD
= +5.25V
DV
DD
-
0.4
V
Output Low Voltage
V
OL
I
SINK
= 1.6mA, DV
DD
= +2.7V to +5.25V,
AV
DD
= +5.25V
0.4
V
Input High Voltage
V
IH
0.7
×
DV
DD
V
Input Low Voltage
V
IL
0.3
×
DV
DD
V
Input Leakage Current
Digital input = DV
DD
or 0V
-1
+1
µA
Input Hysteresis
V
HYST
0.2
V
Input Capacitance
C
IN
15
pF
Tri-State Output Leakage
I
OZ
±10
µA
Tri-State Output Capacitance
C
OZ
15
pF
POWER SUPPLIES
Analog Supply Voltage
AV
DD
4.75
5.25
V
Digital Supply Voltage
DV
DD
2.70
5.25
V
External reference, 135ksps
2.9
Analog Supply Current
I
AVDD
Internal reference, 135ksps
3.8
mA
Shutdown mode (Note 1), digital input =
DV
DD
or 0V
0.5
5
µA
Shutdown Supply Current
I
SHDN
Standby mode
3.7
mA
Digital Supply Current
I
DVDD
0.75
mA
Power-Supply Rejection
AV
DD
= DV
DD
= 4.75V to 5.25V
3.5
LSB
INL vs. CODE
MAX1177 toc01
CODE
INL (LSB)
57,344
40,960
24,576
8192
-2
-1
0
1
2
3
-3
DNL vs. CODE
MAX1177 toc02
-2.5
-1.5
-2.0
-0.5
-1.0
0.5
0
1.0
2.0
1.5
2.5
DNL (LSB)
0
20,000
10,000
40,000 50,000 60,000
30,000
CODE
-40
0
-20
20
40
60
80
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
MAX1177 toc03
TEMPERATURE (
°C)
SUPPLY CURRENT (mA)
5.25V
4.75V
f
SAMPLE
= 135ksps
SHUTDOWN MODE
BETWEEN CONVERSIONS
2.00
2.05
2.10
2.15
2.20
2.25
1.95
5.0V
MAX1177
16-Bit, 135ksps, Single-Supply ADC
with to 10V Input Range
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS (Figures 1 and 2)
(AV
DD
= +4.75V to +5.25V, DV
DD
= +2.7V to AV
DD
, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
,
C
LOAD
= 20pF, T
A
= T
MIN
to T
MAX
.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Sampling Rate
f
SAMPLE-MAX
135
ksps
Acquisition Time
t
ACQ
2
µs
Conversion Time
t
CONV
4.7
µs
CS Pulse-Width High
t
CSH
(Note 2)
40
ns
DV
DD
= 4.75V to 5.25V
40
CS Pulse-Width Low (Note 2)
t
CSL
DV
DD
= 2.7V to 5.25V
60
ns
R/
C to CS Fall Setup Time
t
DS
0
ns
DV
DD
= 4.75V to 5.25V
40
R/
C to CS Fall Hold Time
t
DH
DV
DD
= 2.7V to 5.25V
60
ns
DV
DD
= 4.75V to 5.25V
40
CS to Output Data Valid
t
DO
DV
DD
= 2.7V to 5.25V
80
ns
EOC Fall to CS Fall
t
DV
0
ns
DV
DD
= 4.75V to 5.25V
40
CS Rise to EOC Rise
t
EOC
DV
DD
= 2.7V to 5.25V
80
ns
DV
DD
= 4.75V to 5.25V
40
Bus Relinquish Time
t
BR
DV
DD
= 2.7V to 5.25V
80
ns
DV
DD
= 4.75V to 5.25V
40
HBEN Transition to Output Data
Valid
t
DO
1
DV
DD
= 2.7V to 5.25V
80
ns
Note 1: Maximum specification is limited by automated test equipment.
Note 2: To ensure best performance, finish reading the data and wait t
BR
before starting a new acquisition.
Typical Operating Characteristics
(Typical Operating Circuit, AV
DD
= DV
DD
= +5V, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
,
C
LOAD
= 20pF. Typical values are at T
A
= +25°C, unless otherwise noted.)
MAX1177
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
_______________________________________________________________________________________
5
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. SAMPLE RATE
MAX1177 toc04
SAMPLE RATE (ksps)
SUPPLY CURRENT (mA)
100
10
1
0.1
0.001
0.01
0.1
1
10
0.0001
0.01
1000
STANDBY MODE
SHUTDOWN MODE
0
1.5
1.0
0.5
2.5
2.0
4.5
4.0
3.5
3.0
5.0
-40
-20
0
20
40
60
80
SHUTDOWN CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
MAX1177 toc05
TEMPERATURE (
°C)
SHUTDOWN SUPPLY CURRENT (
µ
A)
NO CONVERSIONS
-10
-4
-6
-8
0
-2
8
6
4
2
10
-40
-20
0
20
40
60
80
OFFSET ERROR vs. TEMPERATURE
MAX1177 toc06
TEMPERATURE (
°C)
OFFSET ERROR (mV)
-0.20
-0.10
-0.15
0
-0.05
0.15
0.10
0.05
0.20
-40
0
-20
20
40
60
80
GAIN ERROR vs. TEMPERATURE
MAX1177 toc07
TEMPERATURE (
°C)
GAIN ERROR (%FSR)
4.056
4.076
4.066
4.096
4.086
4.126
4.116
4.106
4.136
-40
0
-20
20
40
60
80
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1177 toc08
TEMPERATURE (
°C)
INTERNAL REFERENCE (V)
-180
-140
-160
-80
-100
-120
-20
-40
-60
0
0
20
30
10
40
50
60
FFT AT 1kHz
MAX1177 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)
f
SAMPLE
= 131ksps
Typical Operating Characteristics (continued)
(Typical Operating Circuit, AV
DD
= DV
DD
= +5V, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
,
C
LOAD
= 20pF. Typical values are at T
A
= +25°C, unless otherwise noted.)
SINAD vs. FREQUENCY
MAX1177 toc10
FREQUENCY (kHz)
SINAD (dB)
10
10
20
30
40
50
60
70
80
90
100
0
1
100
f
SAMPLE
= 131ksps
SFDR vs. FREQUENCY
MAX1177 toc11
FREQUENCY (kHz)
SFDR (dB)
10
20
40
60
80
100
120
0
1
100
f
SAMPLE
= 131ksps
THD vs. FREQUENCY
MAX1177 toc12
FREQUENCY (kHz)
THD (dB)
10
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
1
100
f
SAMPLE
= 131ksps
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