19-2755; Rev 1; 8/03
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
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. AutoShutdown™ 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 -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: ±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)
5µA AutoShutdown Mode
o
Small Footprint
o
20-Pin TSSOP Package
Features
MAX1178/MAX1188
Ordering Information
PART
MAX1178ACUP
MAX1178BCUP
MAX1178CCUP
MAX1178AEUP
MAX1178BEUP
MAX1178CEUP
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
INPUT
PIN-
VOLTAGE
PACKAGE
RANGE (V)
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
±5
±5
±5
±5
±5
±5
Ordering Information continued at end of data sheet.
Applications
Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
ANALOG INPUT
Typical Operating Circuit
+5V ANALOG +5V DIGITAL
0.1µF
0.1µF
AV
DD
AIN
DV
DD
µP
DATA
D0–D7 BUS
OR
D8–D15
EOC
REF
REFADJ
MAX1178
MAX1188
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 ADCs with
Bipolar Analog Input Range
MAX1178/MAX1188
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
MAX11_ _ _CUP..................................................0°C to +70°C
MAX11_ _ _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
MAX11_ _A
DNL
No missing codes
over temperature
MAX11_ _A
Integral Nonlinearity
INL
MAX11_ _B
MAX11_ _C
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
V
AIN
MAX1178
MAX1188
MAX1178
Input Resistance
R
AIN
MAX1188
Normal operation
Shutdown mode
Normal operation
Shutdown mode
-5
-10
5.3
3.0
7.8
6.0
10
13.0
6.9
+5
+10
9.2
kΩ
V
SINAD
SNR
THD
SFDR
92
86
87
90
91
-100
103
-92
dB
dB
dB
dB
RMS noise, external reference
Internal reference
-10
MAX11_ _B
MAX11_ _C
16
-1
-1.0
-1
-2
-2
-4
0.6
0.75
0
0
16
±1
+10
±0.2
+1
+1.5
+2
+2
+2
+4
LSB
RMS
mV
%FSR
µV/°C
ppm/°C
LSB
LSB
Bits
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog 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
SYMBOL
CONDITIONS
MAX1178,
-5V
≤
V
AIN
≤
+5V
MAX1188,
-10V
≤
V
AIN
≤
+10V
Normal operation
Shutdown mode
Normal operation
Shutdown mode
MIN
-1.8
-1.8
-1.8
-1.8
1
0.5
10
4.056
4.096
±35
I
REF-SC
±10
4.136
TYP
MAX
+0.4
+1.8
+1.2
+1.8
1.4
mA
MAX1188, V
AIN
= +10V, shutdown mode to
operating mode
0.7
pF
V
ppm/°C
mA
mA
UNITS
MAX1178/MAX1188
Input Current
I
AIN
MAX1178, V
AIN
= +5V, shutdown mode to
operating mode
Input Current Step at Power-Up
I
PU
Input Capacitance
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
C
IN
V
REF
3.8
AV
DD
-
0.4
I
REF
I
REFADJ
Normal mode, f
SAMPLE
= 135ksps
Shutdown mode (Note 1)
REFADJ = AV
DD
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
DV
DD
-
0.4
60
±0.1
16
4.2
AV
DD
-
0.1
100
±10
V
V
µA
µA
V
OH
V
OL
V
IH
V
IL
V
0.4
V
V
0.3
×
DV
DD
V
µA
V
pF
±10
15
µA
pF
Digital input = DV
DD
or 0V
V
HYST
C
IN
I
OZ
C
OZ
-1
0.2
15
+1
_______________________________________________________________________________________
3
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
MAX1178/MAX1188
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
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
4.75
2.70
4
5.2
0.5
3.7
0.75
5.25
5.25
5.3
6.2
5
V
V
mA
µA
mA
mA
LSB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Shutdown Supply Current
I
SHDN
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.
4
_______________________________________________________________________________________
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
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
2.5
2.0
1.5
1.0
DNL (LSB)
INL (LSB)
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
0 10,000 20,000 30,000 40,000 50,000 60,000
CODE
MAX1178/88 toc01
MAX1178/MAX1188
DNL vs. CODE
2.5
2.0
1.5
SUPPLY CURRENT (mA)
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
0 10,000 20,000 30,000 40,000 50,000 60,000
CODE
4.70
4.65
4.60
4.55
MAX1178/88 toc02
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
4.75
5.0V
5.25V
MAX1178/88 toc03
4.80
4.75V
4.50
4.45
4.40
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
f
SAMPLE
= 135ksps
SHUTDOWN MODE
BETWEEN CONVERSIONS
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. SAMPLE RATE
MAX1178/88 toc04
SHUTDOWN CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
NO CONVERSIONS
MAX1178/88 toc05
OFFSET ERROR vs. TEMPERATURE
8
6
OFFSET ERROR (mV)
4
2
0
-2
-4
-6
-8
-10
MAX1178
MAX1188
MAX1178/88 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
0
-40
-20
0
20
10
1
SUPPLY CURRENT (mA)
STANDBY MODE
0.1
SHUTDOWN MODE
0.01
0.001
V
AIN
= 0V
0.0001
0.01
0.1
1
10
100
1000
SAMPLE RATE (ksps)
40
60
80
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
GAIN ERROR vs. TEMPERATURE
MAX1178/88 toc07
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1178/88 toc08
FFT AT 1kHz
-20
-40
MAGNITUDE (dB)
-60
-80
-100
-120
-140
-160
-180
f
SAMPLE
= 131ksps
MAX1178/88 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)
_______________________________________________________________________________________
5
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