General Description
The MAX1178/MAX1188 16-bit, low-power, successive-
approximation analog-to-digital converters (ADCs) fea-
ture automatic power-down, a factory-trimmed internal
clock, and a byte-wide parallel interface. The devices
operate from a single +4.75V to +5.25V analog supply
and feature a separate digital supply input for direct
interface with a +2.7V to +5.25V digital logic.
The MAX1188 accepts a bipolar analog input voltage
range of 10V, while the MAX1178 accepts a bipolar
analog input voltage range of 5V. All devices consume
no more than 26.5mW at a sampling rate of 135ksps
when using an external reference, and 31mW when using
the internal +4.096V reference. AutoShutdownTM reduces
supply current to 0.4mA at 10ksps.
The MAX1178/MAX1188 are ideal for high-perfor-
mance, battery-powered, data-acquisition applications.
Excellent AC performance (THD = -100dB) and DC
accuracy (2 LSB INL) make the MAX1178/MAX1188
ideal for industrial process control, instrumentation, and
medical applications.
The MAX1178/MAX1188 are available in a 20-pin
TSSOP package and are fully specified over the -40C
to +85C extended temperature range and the 0C to
+70C 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: 10V, 5V
o Single +4.75V to +5.25V Analog Supply Voltage
o Interface with +2.7V to +5.25V Digital Logic
o 2 LSB INL
o 1 LSB DNL
o Low Supply Current (max)
2.9mA (External Reference)
3.8mA (Internal Reference)
5A AutoShutdown Mode
o Small Footprint
o 20-Pin TSSOP Package
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
________________________________________________________________ Maxim Integrated Products
1
D0D7
OR
D8D15
P 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
F
0.1
F
0.1
F
0.1
F
MAX1178
MAX1188
Typical Operating Circuit
19-2755; Rev 1; 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
INPUT
VOLTAGE
RANGE (V)
MAX1178ACUP
0
C to +70C
20 TSSOP
5
MAX1178BCUP
0
C to +70C
20 TSSOP
5
MAX1178CCUP
0
C to +70C
20 TSSOP
5
MAX1178AEUP
-40
C to +85C
20 TSSOP
5
MAX1178BEUP
-40
C to +85C
20 TSSOP
5
MAX1178CEUP
-40
C to +85C
20 TSSOP
5
Pin Configuration and Functional Diagram appear at end of
data sheet.
Ordering Information continued at end of data sheet.
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog 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
= +70C)
TSSOP (derate 10.9mW/C above +70C) ..................879mW
Operating Temperature Ranges
MAX11_ _ _CUP..................................................0C to +70C
MAX11_ _ _EUP ...............................................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Junction Temperature ......................................................+150C
Lead Temperature (soldering, 10s) .................................+300C
ELECTRICAL CHARACTERISTICS
(AV
DD
= DV
DD
= +5V 5%, external reference = +4.096V, C
REF
= 10F, C
REFADJ
= 0.1F, V
REFADJ
= AV
DD
, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
Resolution
RES
16
Bits
MAX11_ _A
-1
+1
MAX11_ _B
-1.0
+1.5
Differential Nonlinearity
DNL
No missing codes
over temperature
MAX11_ _C
-1
+2
LSB
MAX11_ _A
-2
+2
MAX11_ _B
-2
+2
Integral Nonlinearity
INL
MAX11_ _C
-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
V/C
Gain Drift
1
ppm/C
AC ACCURACY (f
IN
= 1kHz, V
AIN
= full range, 135ksps)
Signal-to-Noise Plus Distortion
SINAD
86
90
dB
Signal-to-Noise Ratio
SNR
87
91
dB
Total Harmonic Distortion
THD
-100
-92
dB
Spurious-Free Dynamic Range
SFDR
92
103
dB
ANALOG INPUT
MAX1178
-5
+5
Input Range
V
AIN
MAX1188
-10
+10
V
Normal operation
5.3
6.9
9.2
MAX1178
Shutdown mode
3.0
Normal operation
7.8
10
13.0
Input Resistance
R
AIN
MAX1188
Shutdown mode
6.0
k
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +5V 5%, external reference = +4.096V, C
REF
= 10F, C
REFADJ
= 0.1F, V
REFADJ
= AV
DD
, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Normal operation
-1.8
+0.4
MAX1178,
-5V
V
AIN
+5V
Shutdown mode
-1.8
+1.8
Normal operation
-1.8
+1.2
Input Current
I
AIN
MAX1188,
-10V
V
AIN
+10V
Shutdown mode
-1.8
+1.8
mA
MAX1178, V
AIN
= +5V, shutdown mode to
operating mode
1
1.4
Input Current Step at Power-Up
I
PU
MAX1188, V
AIN
= +10V, shutdown mode to
operating mode
0.5
0.7
mA
Input Capacitance
C
IN
10
pF
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
A
REFADJ Input Current
I
REFADJ
REFADJ = AV
DD
16
A
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
A
Input Hysteresis
V
HYST
0.2
V
Input Capacitance
C
IN
15
pF
Tri-State Output Leakage
I
OZ
10
A
Tri-State Output Capacitance
C
OZ
15
pF
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog 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
= 10F, C
REFADJ
= 0.1F, 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
s
Conversion Time
t
CONV
4.7
s
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
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +5V 5%, external reference = +4.096V, C
REF
= 10F, C
REFADJ
= 0.1F, V
REFADJ
= AV
DD
, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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
4
5.3
Analog Supply Current
I
AVDD
Internal reference, 135ksps
5.2
6.2
mA
Shutdown mode (Note 1), digital input =
DV
DD
or 0V
0.5
5
A
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
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.
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
5
INL vs. CODE
MAX1178/88 toc01
-2.5
-1.5
-2.0
-0.5
-1.0
0.5
0
1.0
2.0
1.5
2.5
INL (LSB)
0
20,000 30,000 40,000
10,000
50,000 60,000
CODE
DNL vs. CODE
MAX1178/88 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
4.40
4.50
4.45
4.60
4.55
4.75
4.70
4.65
4.80
-40
0
-20
20
40
60
80
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
MAX1178/88 toc03
TEMPERATURE (
C)
SUPPLY CURRENT (mA)
5.25V
5.0V
4.75V
f
SAMPLE
= 135ksps
SHUTDOWN MODE
BETWEEN CONVERSIONS
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. SAMPLE RATE
MAX1178/88 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
V
AIN
= 0V
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
MAX1178/88 toc05
TEMPERATURE (
C)
SHUTDOWN SUPPLY CURRENT (
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
MAX1178/88 toc06
TEMPERATURE (
C)
OFFSET ERROR (mV)
MAX1188
MAX1178
-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
MAX1178/88 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
MAX1178/88 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
MAX1178/88 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)
f
SAMPLE
= 131ksps
Typical Operating Characteristics
(Typical Operating Circuit, AV
DD
= DV
DD
= +5V, external reference = +4.096V, C
REF
= 10F, C
REFADJ
= 0.1F, V
REFADJ
= AV
DD
,
C
LOAD
= 20pF. Typical values are at T
A
= +25C, unless otherwise noted.)
PDF 
ZIP