MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
________________________________________________________________ Maxim Integrated Products
1
19-2653; Rev 1; 1/03
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.
General Description
The MAX1157/MAX1159/MAX1175 14-bit, low-power,
successive-approximation analog-to-digital converters
(ADCs) feature automatic power-down, a factory-trimmed
internal clock, and a 14-bit 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 +2.7V to +5.25V digital logic.
The MAX1157 accepts an analog input voltage range
from 0 to +10V while the MAX1159 accepts a bipolar
analog input voltage range of 10V. The MAX1175
accepts a bipolar analog input voltage range of 5V.
All devices consume only 23mW at a sampling rate
of 135ksps when using an external reference and
29mW when using the internal +4.096V reference.
AutoShutdownTM reduces supply current to 0.4mA at
10ksps. The MAX1157/MAX1159/MAX1175 are ideal for
high-performance, battery-powered data-acquisition
applications. Excellent AC performance (THD = -100dB)
and DC accuracy (1LSB INL) make the MAX1157/
MAX1159/MAX1175 ideal for industrial process control,
instrumentation, and medical applications.
The MAX1157/MAX1159/MAX1175 are available in a
28-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 Analog Input Voltage Range 10V, 5V, or 0 to 10V
o 14-Bit Wide Parallel Interface
o Single +4.75V to +5.25V Analog Supply Voltage
o Interfaces with +2.7V to +5.25V Digital Logic
o 1LSB INL (max)
o 1LSB DNL (max)
o Low Supply Current (MAX1159)
5.3mA (External Reference)
6.2mA (Internal Reference)
5A AutoShutdown Mode
o Small Footprint
28-Pin TSSOP Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
INPUT VOLTAGE
RANGE
INL (LSB)
MAX1157ACUI
0C to +70C
28 TSSOP
0 to +10V
1
MAX1157BCUI
0C to +70C
28 TSSOP
0 to +10V
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D5
D4
D3
D2
D1
D0
REFADJ
N.C.
N.C.
DV
DD
DGND
CS
RESET
REF
AGND
AIN
AGND
AV
DD
EOC
R/C
D13
D12
D11
D10
D9
D8
D7
D6
TSSOP
TOP VIEW
MAX1157
MAX1159
MAX1175
Pin Configuration
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet.
MAX1157/MAX1159/MAX1175
14-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, RESET 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)
28-Pin TSSOP (derate 12.8mW/C above +70C) .....1026mW
Operating Temperature Range
MAX11_ _ _CUI ...................................................0C to +70C
MAX11_ _ _EUI ................................................-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
14
Bits
Differential Nonlinearity
DNL
No missing codes over temperature
-1
+1
LSB
MAX11_ _A
-1
+1
Integral Nonlinearity
INL
MAX11_ _B
-2
+2
LSB
RMS noise, external reference
0.32
Transition Noise
Internal reference
0.34
LSB
RMS
MAX1159
-10
0
+10
Offset Error
MAX1157/MAX1175
-10
+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
81
85
dB
Signal-to-Noise Ratio
SNR
82
85
dB
Total Harmonic Distortion
THD
-100
-86
dB
Spurious-Free Dynamic Range
SFDR
87
103
dB
ANALOG INPUT
MAX1157
0
+10
MAX1159
-10
+10
Input Range
V
AIN
MAX1175
-5
+5
V
MAX1157/MAX1175
Normal operation
5.3
6.9
9.2
MAX1175
Shutdown mode
3
MAX1157
Shutdown mode
5.3
Normal operation
7.8
10
13.0
Input Resistance
R
AIN
MAX1159
Shutdown mode
6
k
MAX1157/MAX1159/MAX1175
14-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
MAX1157,
0
V
AIN
+10V
Normal/shutdown
mode
-0.1
+2.0
Normal operation
-1.8
+1.2
MAX1159,
-10V
V
AIN
+10V
Shutdown mode
-1.8
+1.8
Normal operation
-1.8
+0.4
Input Current
I
AIN
MAX1175,
-5V
V
AIN
+5V
Shutdown mode
-1.8
+1.8
mA
MAX1159, V
AIN
= +10V, shutdown mode to
operating mode
0.5
0.7
Input Current Step at Power-Up
I
PU
MAX1175, V
AIN
= +5V, shutdown mode to
operating mode
1
1.4
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
Three-State Output Leakage
I
OZ
10
A
Three-State Output Capacitance
C
OZ
15
pF
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
4
_______________________________________________________________________________________
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.
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
MAX1157
2.9
External reference,
135ksps
MAX1159/MAX1175
4.0
5.3
MAX1157
3.8
Analog Supply Current
I
AVDD
Internal reference,
135ksps
MAX1159/MAX1175
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
1
LSB
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
t
CSL
(Note 2)
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
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
5
INL vs. CODE
MAX1157 toc01
CODE
INL (LSB)
12288
16384
8192
4096
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
2.5
-2.5
0
DNL vs. CODE
MAX1157 toc02
CODE
DNL (LSB)
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0
12288
16384
8192
4096
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
MAX1157 toc03
TEMPERATURE (
C)
SUPPLY CURRENT (mA)
60
40
-20
0
20
4.45
4.50
4.55
4.60
4.65
4.70
4.75
4.80
4.40
-40
80
5.25V
5.0V
4.75V
f
SAMPLE
= 135ksps
SHUTDOWN MODE BETWEEN
CONVERSIONS
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. SAMPLE RATE
MAX1157 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
V
AIN
= 0V
GAIN ERROR vs. TEMPERATURE
MAX1157 toc07
TEMPERATURE (
C)
GAIN ERROR (%FSR)
60
40
-20
0
20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
-0.20
-40
80
SHUTDOWN CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
MAX1157 toc05
TEMPERATURE (
C)
SHUTDOWN SUPPLY CURRENT (mA)
60
40
-20
0
20
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.5
4.0
5.0
0
-40
80
NO CONVERSIONS
OFFSET ERROR vs. TEMPERATURE
MAX1157 toc06
TEMPERATURE (
C)
OFFSET ERROR (mV)
60
40
-20
0
20
-8
-6
-4
-2
0
2
4
8
6
10
-10
-40
80
MAX1159
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1157 toc08
TEMPERATURE (
C)
INTERNAL REFERENCE (V)
60
40
-20
0
20
4.066
4.076
4.086
4.096
4.106
4.116
4.126
4.136
4.056
-40
80
FFT AT 1kHz
MAX
1157 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)
40
20
-160
-140
-120
-100
-80
-60
-40
-20
0
-180
0
60
f
SAMPLE
= 135ksps
Typical Operating Characteristics
(AV
DD
= DV
DD
= +5V, 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
, unless otherwise noted. Typical values are at T
A
= +25C.) (Typical Application Circuit)
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