19-2597; Rev 0; 8/03
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
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. AutoShutdown™ 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.
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
Features
MAX1177
Ordering Information
PART
MAX1177ACUP
MAX1177BCUP
MAX1177CCUP
MAX1177AEUP
MAX1177BEUP
MAX1177CEUP
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
Applications
Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
ANALOG INPUT
AIN
0.1µF
+5V ANALOG
+5V DIGITAL
0.1µF
Typical Operating Circuit
AV
DD
DV
DD
µP
DATA
D0–D7 BUS
OR
D8–D15
EOC
REF
REFADJ
MAX1177
R/C
CS
HBEN
Pin Configuration and Functional Diagram appear at end of
data sheet.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
HIGH
BYTE
LOW
BYTE
AGND DGND
0.1µF
10µF
________________________________________________________________
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, 135ksps, Single-Supply ADC
with to 10V Input Range
MAX1177
ABSOLUTE MAXIMUM RATINGS
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
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
= +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
DC ACCURACY
Resolution
Differential Nonlinearity
RES
MAX1177A
DNL
No missing codes
over temperature
MAX1177A
Integral Nonlinearity
INL
MAX1177B
MAX1177C
Transition Noise
Offset Error
Gain Error
Offset Drift
Gain Drift
AC ACCURACY
(f
IN
= 1kHz, V
AIN
= full range, 135ksps)
Signal-to-Noise Plus Distortion
Signal-to-Noise Ratio
Total Harmonic Distortion
Spurious-Free Dynamic Range
ANALOG INPUT
Input Range
Input Resistance
Input Current
Input Capacitance
V
AIN
R
AIN
I
AIN
C
IN
Normal operation
Shutdown mode
0
≤
V
AIN
≤
+10V
0
5.3
5.3
-0.1
10
+2.0
6.9
10
9.2
V
kΩ
mA
pF
SINAD
SNR
THD
SFDR
92
85
86
90
91
-100
103
-92
dB
dB
dB
dB
RMS noise, external reference
Internal reference
-10
MAX1177B
MAX1177C
16
-1
-1.0
-1
-3
-3
-4
0.6
0.75
0
0
16
±1
+10
±0.2
+1
+1.5
+2
+3
+3
+4
LSB
RMS
mV
%FSR
µV/°C
ppm/°C
LSB
LSB
Bits
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
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
INTERNAL REFERENCE
REF Output Voltage
REF Output Tempco
REF Short-Circuit Current
EXTERNAL REFERENCE
REF and REFADJ Input-Voltage
Range
REFADJ Buffer-Disable Threshold
REF Input Current
REFADJ Input Current
DIGITAL INPUTS/OUTPUTS
Output High Voltage
Output Low Voltage
Input High Voltage
Input Low Voltage
Input Leakage Current
Input Hysteresis
Input Capacitance
Tri-State Output Leakage
Tri-State Output Capacitance
POWER SUPPLIES
Analog Supply Voltage
Digital Supply Voltage
Analog Supply Current
AV
DD
DV
DD
I
AVDD
External reference, 135ksps
Internal reference, 135ksps
Shutdown mode (Note 1), digital input =
DV
DD
or 0V
Standby mode
Digital Supply Current
Power-Supply Rejection
I
DVDD
AV
DD
= DV
DD
= 4.75V to 5.25V
3.5
0.5
3.7
0.75
4.75
2.70
5.25
5.25
2.9
3.8
5
V
V
mA
µA
mA
mA
LSB
V
HYST
C
IN
I
OZ
C
OZ
15
V
OH
V
OL
V
IH
V
IL
Digital input = DV
DD
or 0V
-1
0.2
15
±10
I
SOURCE
= 0.5mA, DV
DD
= +2.7V to +5.25V,
AV
DD
= +5.25V
I
SINK
= 1.6mA, DV
DD
= +2.7V to +5.25V,
AV
DD
= +5.25V
0.7
×
DV
DD
0.3
×
DV
DD
+1
DV
DD
-
0.4
0.4
V
V
V
V
µA
V
pF
µA
pF
I
REF
I
REFADJ
Normal mode, f
SAMPLE
= 135ksps
Shutdown mode (Note 1)
REFADJ = AV
DD
3.8
AV
DD
-
0.4
60
±0.1
16
4.2
AV
DD
-
0.1
100
±10
V
V
µA
µA
I
REF-SC
V
REF
4.056
4.096
±35
±10
4.136
V
ppm/°C
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1177
Shutdown Supply Current
I
SHDN
_______________________________________________________________________________________
3
16-Bit, 135ksps, Single-Supply ADC
with to 10V Input Range
MAX1177
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
Maximum Sampling Rate
Acquisition Time
Conversion Time
CS
Pulse-Width High
CS
Pulse-Width Low (Note 2)
R/C to
CS
Fall Setup Time
R/C to
CS
Fall Hold Time
CS
to Output Data Valid
EOC
Fall to
CS
Fall
CS
Rise to
EOC
Rise
Bus Relinquish Time
HBEN Transition to Output Data
Valid
SYMBOL
f
SAMPLE-MAX
t
ACQ
t
CONV
t
CSH
t
CSL
t
DS
t
DH
t
DO
t
DV
t
EOC
t
BR
t
DO
1
DV
DD
= 4.75V to 5.25V
DV
DD
= 2.7V to 5.25V
DV
DD
= 4.75V to 5.25V
DV
DD
= 2.7V to 5.25V
DV
DD
= 4.75V to 5.25V
DV
DD
= 2.7V to 5.25V
DV
DD
= 4.75V to 5.25V
DV
DD
= 2.7V to 5.25V
DV
DD
= 4.75V to 5.25V
DV
DD
= 2.7V to 5.25V
0
40
80
40
80
40
80
(Note 2)
DV
DD
= 4.75V to 5.25V
DV
DD
= 2.7V to 5.25V
40
40
60
0
40
60
40
80
2
4.7
CONDITIONS
MIN
TYP
MAX
135
UNITS
ksps
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
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.)
INL vs. CODE
MAX1177 toc01
DNL vs. CODE
2.5
2.0
1.5
1.0
DNL (LSB)
0.5
0
-0.5
-1.0
-1.5
-2.0
SUPPLY CURRENT (mA)
2.20
2.15
MAX1177 toc02
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
5.25V
MAX1177 toc03
3
2
1
INL (LSB)
0
-1
-2
-3
8192
24,576
40,960
57,344
CODE
2.25
5.0V
2.10
2.05
2.00
4.75V
1.95
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
f
SAMPLE
= 135ksps
SHUTDOWN MODE
BETWEEN CONVERSIONS
-2.5
0 10,000 20,000 30,000 40,000 50,000 60,000
CODE
4
_______________________________________________________________________________________
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
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.)
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. SAMPLE RATE
MAX1177 toc04
MAX1177
SHUTDOWN CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
NO CONVERSIONS
MAX1177 toc05
OFFSET ERROR vs. TEMPERATURE
8
6
OFFSET ERROR (mV)
4
2
0
-2
-4
-6
-8
-10
MAX1177 toc06
10
5.0
SHUTDOWN SUPPLY CURRENT (µA)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
10
1
SUPPLY CURRENT (mA)
STANDBY MODE
0.1
0.01
SHUTDOWN MODE
0.001
0.0001
0.01
0.1
1
10
100
1000
SAMPLE RATE (ksps)
0
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
GAIN ERROR vs. TEMPERATURE
MAX1177 toc07
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1177 toc08
FFT AT 1kHz
-20
-40
MAGNITUDE (dB)
-60
-80
-100
-120
-140
-160
-180
f
SAMPLE
= 131ksps
MAX1177 toc09
0.20
0.15
GAIN ERROR (%FSR)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
4.136
4.126
INTERNAL REFERENCE (V)
4.116
4.106
4.096
4.086
4.076
4.066
4.056
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
0
0
10
20
30
40
50
60
FREQUENCY (kHz)
SINAD vs. FREQUENCY
MAX1177 toc10
SFDR vs. FREQUENCY
MAX1177 toc11
THD vs. FREQUENCY
-10
-20
-30
-40
-50
-60
-70
-80
-90
MAX1177 toc12
100
90
80
70
SINAD (dB)
120
100
80
SFDR (dB)
60
40
20
0
50
40
30
20
10
0
1
10
FREQUENCY (kHz)
100
f
SAMPLE
= 131ksps
f
SAMPLE
= 131ksps
0
1
10
FREQUENCY (kHz)
100
THD (dB)
60
-100
-110
1
10
f
SAMPLE
= 131ksps
100
FREQUENCY (kHz)
_______________________________________________________________________________________
5
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