19-2653; Rev 1; 1/03
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
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.
AutoShutdown™ 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
-40°C to +85°C extended temperature range and the
0°C to +70°C commercial temperature range.
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)
5µA AutoShutdown Mode
o
Small Footprint
28-Pin TSSOP Package
Features
o
Analog Input Voltage Range ±10V, ±5V, or 0 to 10V
MAX1157/MAX1159/MAX1175
Pin Configuration
TOP VIEW
D6 1
D7 2
D8 3
D9 4
D10 5
28 D5
27 D4
26 D3
25 D2
24 D1
Applications
Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
D11 6
D12 7
D13 8
R/C 9
EOC 10
AV
DD
11
AGND 12
AIN 13
AGND 14
MAX1157
MAX1159
MAX1175
23 D0
22 N.C.
21 N.C.
20 DV
DD
19 DGND
18 CS
17 RESET
16 REF
15 REFADJ
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
TSSOP
Ordering Information
PART
MAX1157ACUI
MAX1157BCUI
TEMP RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
28 TSSOP
28 TSSOP
INPUT VOLTAGE
RANGE
0 to +10V
0 to +10V
INL (LSB)
±1
±2
Ordering Information continued at end of data sheet.
________________________________________________________________
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.
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
MAX1157/MAX1159/MAX1175
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, 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
= +70°C)
28-Pin TSSOP (derate 12.8mW/°C above +70°C) .....1026mW
Operating Temperature Range
MAX11_ _ _CUI ...................................................0°C to +70°C
MAX11_ _ _EUI ................................................-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
Integral Nonlinearity
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
MAX1157
Input Range
V
AIN
MAX1159
MAX1175
MAX1157/MAX1175
MAX1175
Input Resistance
R
AIN
MAX1157
MAX1159
Normal operation
Shutdown mode
Shutdown mode
Normal operation
Shutdown mode
0
-10
-5
5.3
3
5.3
7.8
6
10
13.0
kΩ
6.9
+10
+10
+5
9.2
V
SINAD
SNR
THD
SFDR
87
81
82
85
85
-100
103
-86
dB
dB
dB
dB
RES
DNL
INL
No missing codes over temperature
MAX11_ _A
MAX11_ _B
RMS noise, external reference
Internal reference
MAX1159
MAX1157/MAX1175
-10
-10
0
16
±1
14
-1
-1
-2
0.32
0.34
0
+10
+10
±0.2
+1
+1
+2
Bits
LSB
LSB
LSB
RMS
mV
%FSR
µV/°C
ppm/°C
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
14-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
MAX1157,
0
≤
V
AIN
≤
+10V
Input Current
I
AIN
MAX1159,
-10V
≤
V
AIN
≤
+10V
MAX1175,
-5V
≤
V
AIN
≤
+5V
Normal/shutdown
mode
Normal operation
Shutdown mode
Normal operation
Shutdown mode
MIN
-0.1
-1.8
-1.8
-1.8
-1.8
0.5
1
10
4.056
4.096
±35
I
REF-SC
±10
4.136
TYP
MAX
+2.0
+1.2
+1.8
+0.4
+1.8
0.7
mA
MAX1175, V
AIN
= +5V, shutdown mode to
operating mode
1.4
pF
V
ppm/°C
mA
mA
UNITS
MAX1157/MAX1159/MAX1175
MAX1159, V
AIN
= +10V, 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
Three-State Output Leakage
Three-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, DV
DD
-
AV
DD
= +5.25V
0.4
I
SINK
= 1.6mA, DV
DD
= +2.7V to +5.25V,
AV
DD
= +5.25V
0.7
×
DV
DD
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
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
MAX1157/MAX1159/MAX1175
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
AV
DD
DV
DD
External reference,
135ksps
Analog Supply Current
I
AVDD
Internal reference,
135ksps
MAX1157
MAX1159/MAX1175
MAX1157
MAX1159/MAX1175
5.2
0.5
3.7
0.75
AV
DD
= DV
DD
= +4.75V to +5.25V
1
4.0
4.75
2.70
5.25
5.25
2.9
5.3
3.8
6.2
5
µA
mA
mA
LSB
mA
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Shutdown Supply Current
Digital Supply Current
Power-Supply Rejection
I
SHDN
I
DVDD
Shutdown mode (Note 1), digital input =
DV
DD
or 0V
Standby mode
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
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
SYMBOL
f
SAMPLE-MAX
t
ACQ
t
CONV
t
CSH
t
CSL
t
DS
t
DH
t
DO
t
DV
t
EOC
t
BR
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
(Note 2)
(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
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
_______________________________________________________________________________________
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
MAX1157/MAX1159/MAX1175
Typical Operating Characteristics
(AV
DD
= DV
DD
= +5V, 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
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Typical
Application Circuit)
INL vs. CODE
MAX1157 toc01
DNL vs. CODE
0.8
0.6
0.4
DNL (LSB)
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
4.45
4.40
0
4096
8192
CODE
12288
16384
-40
MAX1157 toc02
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
4.75
SUPPLY CURRENT (mA)
4.70
4.65
4.60
4.55
4.50
f
SAMPLE
= 135ksps
SHUTDOWN MODE BETWEEN
CONVERSIONS
-20
0
20
40
60
80
4.75V
5.0V
MAX1157 toc03
2.5
2.0
1.5
1.0
INL (LSB)
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
0
4096
8192
CODE
12288
1.0
4.80
5.25V
16384
TEMPERATURE (°C)
SUPPLY CURRENT (AV
DD
+ DV
DD
)
vs. SAMPLE RATE
MAX1157 toc04
SHUTDOWN CURRENT (AV
DD
+ DV
DD
)
vs. TEMPERATURE
MAX1157 toc05
OFFSET ERROR vs. TEMPERATURE
8
6
OFFSET ERROR (mV)
4
2
0
-2
-4
-6
-8
-10
MAX1159
MAX1157 toc06
10
STANDBY
MODE
5.0
SHUTDOWN SUPPLY CURRENT (mA)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
NO CONVERSIONS
10
1
SUPPLY CURRENT (mA)
0.1
SHUTDOWN
MODE
0.01
0.001
V
AIN
= 0V
0.01
0.1
1
10
100
1000
0.0001
SAMPLE RATE (ksps)
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
GAIN ERROR vs. TEMPERATURE
MAX1157 toc07
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1157 toc08
FFT AT 1kHz
f
SAMPLE
= 135ksps
-20
-40
MAGNITUDE (dB)
-60
-80
-100
-120
-140
-160
-180
MAX 1157 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
20
40
60
FREQUENCY (kHz)
_______________________________________________________________________________________
5
