MAX1157AEUI+-MAX1159AEUI+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1157AEUI+ ,14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeFeaturesThe MAX1157/MAX1159/MAX1175 14-bit, low-power,♦ Analog Input Voltage Range ±10V, ±5V, or 0 ..
MAX1157AEUI+ ,14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeELECTRICAL CHARACTERISTICS(AV = DV = +5V ±5%, external reference = +4.096V, C = 10µF, C = 0.1µF, V ..
MAX1158ACUP+ ,14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeELECTRICAL CHARACTERISTICS(AV = DV = +5V ±5%, external reference = +4.096V, C = 10µF, C = 0.1µF, V ..
MAX1159AEUI+ ,14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeApplicationsMAX1175D12 7 22 N.C.Temperature Sensing and MonitoringD13 8 21 N.C.Industrial Process C ..
MAX115CAX ,2x4-Channel, Simultaneous-Sampling 12-Bit ADCsELECTRICAL CHARACTERISTICS(AV = +5V ±5%, AV = -5V ±5%, DV = +5V ±5%, V = +2.5V (external reference) ..
MAX115CAX+ ,2x4-Channel, Simultaneous-Sampling 12-Bit ADCsApplications Ordering InformationMultiphase Motor ControlPART TEMP. RANGE PIN-PACKAGEPower-Grid Syn ..
MAX3485EESA+TG126 ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485ESA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485ESA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485ESA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485ESA+ ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3486CSA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers

MAX1157AEUI+-MAX1159AEUI+
14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
19-2653; Rev 1; 1/03
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.
Applications
Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
FeaturesAnalog Input Voltage Range ±10V, ±5V, or 0 to 10V14-Bit Wide Parallel InterfaceSingle +4.75V to +5.25V Analog Supply VoltageInterfaces with +2.7V to +5.25V Digital Logic±1LSB INL (max)±1LSB DNL (max)Low Supply Current (MAX1159)
5.3mA (External Reference)
6.2mA (Internal Reference)
5µA AutoShutdown ModeSmall Footprint
28-Pin TSSOP Package
Ordering InformationPART TEMP RANGE PIN-PACKAGE INPUT VOLTAGE
RANGE INL (LSB)
MAX1157ACUI0°C to +70°C28 TSSOP0 to +10V±1
MAX1157BCUI0°C to +70°C28 TSSOP0 to +10V±2
REFADJ
N.C.
N.C.
DVDD
DGND
RESET
REF
AGND
AIN
AGND
AVDD
EOC
R/C
D13
D12
D11
D10
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
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.
AVDDto AGND.........................................................-0.3V to +6V
DVDDto 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 (AVDD+ 0.3V)
CS, R/C, RESET to DGND........................................-0.3V to +6V
D_, EOCto DGND...................................-0.3V to (DVDD+ 0.3V)
Maximum Continuous Current Into Any Pin........................50mA
Continuous Power Dissipation (TA= +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
ELECTRICAL CHARACTERISTICS
(AVDD= DVDD= +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC ACCURACY
ResolutionRES14Bits
Differential NonlinearityDNLNo missing codes over temperature-1+1LSB
MAX11_ _A-1+1Integral NonlinearityINLMAX11_ _B-2+2LSB
RMS noise, external reference0.32Transition NoiseInternal reference0.34LSBRMS
MAX1159-100+10Offset ErrorMAX1157/MAX1175-10+10mV
Gain Error0±0.2%FSR
Offset Drift16µV/°C
Gain Drift±1ppm/°C
AC ACCURACY (fIN = 1kHz, VAIN = full range, 135ksps)
Signal-to-Noise Plus DistortionSINAD8185dB
Signal-to-Noise RatioSNR8285dB
Total Harmonic DistortionTHD-100-86dB
Spurious-Free Dynamic RangeSFDR87103dB
ANALOG INPUT
MAX11570+10
MAX1159-10+10Input RangeVAIN
MAX1175-5+5
MAX1157/MAX1175Normal operation5.36.99.2
MAX1175Shutdown mode3
MAX1157Shutdown mode5.3
Normal operation7.81013.0
Input ResistanceRAIN
MAX1159Shutdown mode6
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
MAX1157,
0 ≤ VAIN ≤ +10V
Normal/shutdown
mode-0.1+2.0
Normal operation-1.8+1.2MAX1159,
-10V ≤ VAIN ≤ +10VShutdown mode-1.8+1.8
Normal operation-1.8+0.4
Input CurrentIAIN
MAX1175,
-5V ≤ VAIN ≤ +5VShutdown mode-1.8+1.8
MAX1159, VAIN = +10V, shutdown mode to
operating mode0.50.7
Input Current Step at Power-UpIPU
MAX1175, VAIN = +5V, shutdown mode to
operating mode11.4
Input CapacitanceCIN10pF
INTERNAL REFERENCE
REF Output VoltageVREF4.0564.0964.136V
REF Output Tempco±35ppm/°C
REF Short-Circuit CurrentIREF-SC±10mA
EXTERNAL REFERENCE
REF and REFADJ Input Voltage
Range3.84.2V
REFADJ Buffer Disable ThresholdAVDD -
AVDD -
0.1V
Normal mode, fSAMPLE = 135ksps60100REF Input CurrentIREFShutdown mode (Note 1)±0.1±10µA
REFADJ Input CurrentIREFADJREFADJ = AVDD16µA
DIGITAL INPUTS/OUTPUTS
Output High VoltageVOHISOURCE = 0.5mA, DVDD = +2.7V to +5.25V,
AVDD = +5.25V
DVDD -
0.4V
Output Low VoltageVOLISINK = 1.6mA, DVDD = +2.7V to +5.25V,
AVDD = +5.25V0.4V
Input High VoltageVIH0.7 ×
DVDDV
Input Low VoltageVIL0.3 ×
DVDDV
Input Leakage CurrentDigital input = DVDD or 0V-1+1µA
Input HysteresisVHYST0.2V
Input CapacitanceCIN15pF
Three-State Output LeakageIOZ±10µA
Three-State Output CapacitanceCOZ15pF
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Note 1:Maximum specification is limited by automated test equipment.
Note 2:To ensure best performance, finish reading the data and wait tBRbefore starting a new acquisition.
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLIES
Analog Supply VoltageAVDD4.755.25V
Digital Supply VoltageDVDD2.705.25V
MAX11572.9External reference,
135kspsMAX1159/MAX11754.05.3
MAX11573.8Analog Supply CurrentIAVDD
Internal reference,
135kspsMAX1159/MAX11755.26.2
Shutdown mode (Note 1), digital input =
DVDD or 0V0.55µAShutdown Supply CurrentISHDN
Standby mode3.7mA
Digital Supply CurrentIDVDD0.75mA
Power-Supply RejectionAVDD = DVDD = +4.75V to +5.25V1LSB
TIMING CHARACTERISTICS (Figures 1 and 2)
(AVDD= +4.75V to +5.25V, DVDD= +2.7V to AVDD, external reference = +4.096V, CREF= 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD,
CLOAD= 20pF, TA= TMINto TMAX.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Maximum Sampling RatefSAMPLE-MAX135ksps
Acquisition TimetACQ2µs
Conversion TimetCONV4.7µs
CS Pulse Width HightCSH(Note 2)40ns
DVDD = +4.75V to +5.25V40CS Pulse Width LowtCSL(Note 2)DVDD = +2.7V to +5.25V60ns
R/C to CS Fall Setup TimetDS0ns
DVDD = +4.75V to +5.25V40R/C to CS Fall Hold TimetDHDVDD = +2.7V to +5.25V60ns
DVDD = +4.75V to +5.25V40CS to Output Data ValidtDODVDD = +2.7V to +5.25V80ns
EOC Fall to CS FalltDV0ns
DVDD = +4.75V to +5.25V40CS Rise to EOC RisetEOCDVDD = +2.7V to +5.25V80ns
DVDD = +4.75V to +5.25V40Bus Relinquish TimetBRDVDD = +2.7V to +5.25V80ns
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
INL vs. CODE
MAX1157 toc01
CODE
INL (LSB)
DNL vs. CODE
MAX1157 toc02
CODE
DNL (LSB)
SUPPLY CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1157 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (mA)40-20020
5.25V
5.0V
4.75V
fSAMPLE = 135ksps
SHUTDOWN MODE BETWEEN
CONVERSIONS
SUPPLY CURRENT (AVDD + DVDD)
vs. SAMPLE RATE
MAX1157 toc04
SAMPLE RATE (ksps)
SUPPLY CURRENT (mA)
STANDBY
MODE
SHUTDOWN
MODE
VAIN = 0V
GAIN ERROR vs. TEMPERATURE
MAX1157 toc07
TEMPERATURE (°C)
GAIN ERROR (%FSR)40-20020
SHUTDOWN CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1157 toc05
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (mA)40-20020
NO CONVERSIONS
OFFSET ERROR vs. TEMPERATURE
MAX1157 toc06
TEMPERATURE (°C)
OFFSET ERROR (mV)40-20020
MAX1159
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1157 toc08
TEMPERATURE (°C)
INTERNAL REFERENCE (V)40-20020
FFT AT 1kHz
MAX
1157 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)20
fSAMPLE = 135ksps
Typical Operating Characteristics
(AVDD= DVDD= +5V, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, CLOAD= 20pF, TA= TMINto
TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Typical Application Circuit)
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
SINAD vs. FREQUENCY
MAX1157 toc10
FREQUENCY (kHz)
SINAD (dB)
SPURIOUS-FREE DYNAMIC RANGE
vs. FREQUENCY
MAX1157 toc11
FREQUENCY (kHz)
SFDR (dB)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX1157 toc12
FREQUENCY (kHz)
THD (dB)
Typical Operating Characteristics
(AVDD= DVDD= +5V, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, CLOAD= 20pF, TA= TMINto
TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Typical Application Circuit)
Pin Description
PINNAMEFUNCTIOND6Three-State Digital Data OutputD7Three-State Digital Data OutputD8Three-State Digital Data OutputD9Three-State Digital Data OutputD10Three-State Digital Data OutputD11Three-State Digital Data OutputD12Three-State Digital Data OutputD13Three-State Digital Data Output (MSB)
9R/C
Read/Convert Input. Power up and place the MAX1157/MAX1159/MAX1175 in acquisition mode by
holding R/C low during the first falling edge of CS. During the second falling edge of CS, the level on
R/C determines whether the reference and reference buffer power down or remain on after
conversion. Set R/C high during the second falling edge of CS to power down the reference and
buffer, or set R/C low to leave the reference and buffer powered up. Set R/C high during the third
falling edge of CS to put valid data on the bus.EOCEnd of Conversion. EOC drives low when conversion is complete.AVDDAnalog Supply Input. Bypass with a 0.1µF capacitor to AGND.AGNDAnalog Ground. Primary analog ground (star ground).AINAnalog InputAGNDAnalog Ground. Connect pin 14 to pin 12.
Detailed Description
Converter Operation
The MAX1157/MAX1159/MAX1175 use a successive-
approximation (SAR) conversion technique with an
inherent track-and-hold (T/H) stage to convert an analog
input into a 14-bit digital output. Parallel outputs provide
a high-speed interface to microprocessors (µPs). The
Functional Diagramat the end of the data sheet shows a
simplified internal architecture of the MAX1157/
MAX1159/MAX1175. Figure 3 shows a typical applica-
tion circuit for the MAX1157/MAX1159/MAX1175.
Analog Input
Input Scaler
The MAX1157/MAX1159/MAX1175 have an input scaler
which allows conversion of true bipolar input voltages
and input voltages greater than the power supply, while
operating from a single +5V analog supply. The input
scaler attenuates and shifts the analog input to match
the input range of the internal DAC. The MAX1157 has
a unipolar input voltage range of 0 to +10V. The
MAX1175 input voltage range is ±5V while the
MAX1159 input voltage range is ±10V. Figure 4shows
the equivalent input circuit of the MAX1157/
MAX1159/MAX1175. This circuit limits the current going
into or out of AIN to less than 1.8mA.
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Pin Description (continued)
PINNAMEFUNCTIONREFADJReference Buffer Output. Bypass REFADJ with a 0.1µF capacitor to AGND for internal reference
mode. Connect REFADJ to AVDD to select external reference mode.REFReference Input/Output. Bypass REF with a 10µF capacitor to AGND. REF is the external reference
input when in external reference mode.RESETReset Input. Logic high resets the device.CS
Convert Start. The first falling edge of CS powers up the device and enables acquisition when R/C
is low. The second falling edge of CS starts conversion. The third falling edge of CS loads the result
onto the bus when R/C is high.DGNDDigital GroundDVDDDigital Supply Voltage. Bypass with a 0.1µF capacitor to DGND.
21, 22N.C.No Connection. Make no connection to these pins.D0Three-State Digital Data Output (LSB)D1Three-State Digital Data OutputD2Three-State Digital Data OutputD3Three-State Digital Data OutputD4Three-State Digital Data OutputD5Three-State Digital Data Output
Figure 1. Load Circuits
1mA
DGND
HIGH-Z TO VOH,
VOL TO VOH, AND
VOH TO HIGH-Z
CLOAD = 20pF
D0–D13
1mA
DVDD
DGND
HIGH-Z TO VOL,
VOH TO VOL, AND
VOL TO HIGH-Z
CLOAD = 20pF
D0–D13
MAX1157/MAX1159/MAX1175
Track and Hold (T/H)
In track mode, the internal hold capacitor acquires the
analog signal (see Figure 4). In hold mode, the T/H
switches open and the capacitive DAC samples the
analog input. During the acquisition, the analog input
(AIN) charges capacitor CHOLD. The acquisition ends
on the second falling edge of CS. At this instant, the
T/H switches open. The retained charge on CHOLDrep-
resents a sample of the input. In hold mode, the capac-
itive DAC adjusts during the remainder of the
conversion time to restore node T/H OUT to zero within
the limits of 14-bit resolution. Force CSlow to put valid
data on the bus after conversion is complete.
Power-Down Modes
Select standby mode or shutdown mode with R/Cduring
the second falling edge of CS(see SelectingStandby or
Shutdown Modesection). The MAX1157/MAX1159/
MAX1175 automatically enter either standby mode (refer-
ence and buffer on), or shutdown (reference and buffer
off) after each conversion depending on the status of
R/Cduring the second falling edge of CS.
Internal Clock
The MAX1157/MAX1159/MAX1175 generate an internal
conversion clock to free the microprocessor from the bur-
den of running the SAR conversion clock. Total conver-
sion time after entering hold mode (second falling edge
of CS) to end-of-conversion (EOC) falling is 4.7µs (max).
Applications Information
Starting a Conversionand R/Ccontrol acquisition and conversion in the
MAX1157/MAX1159/MAX1175 (see Figure 2). The first
falling edge of CSpowers up the device and puts it in
acquire mode if R/Cis low. The convert start CSis
ignored if R/Cis high. The MAX1157/MAX1159/
MAX1175 need at least 6ms (CREFADJ= 0.1µF, CREF=
10µF) for the internal reference to wake up and settle
before starting the conversion if powering up from shut-
down. Reset the MAX1157/MAX1159/MAX1175 by tog-
gling RESET with CShigh. The next falling edge of CS
begins acquisition.
Selecting Standby or Shutdown Mode
The MAX1157/MAX1159/MAX1175 have a selectable
standby or low-power shutdown mode. In standby
mode, the ADC’s internal reference and reference
buffer do not power down between conversions, elimi-
nating the need to wait for the reference to power up
before performing the next conversion. Shutdown mode
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Figure 2. MAX1157/MAX1159/MAX1175Timing Diagram
tCSLtCSH
tACQ
tDH
R/C
EOC
D0–D13
tDStDVtEOC
tDOtBRtCONVHIGH-Z
REF POWER-
DOWN CONTROL
HIGH-Z
DATA VALID
Figure 3. Typical Application Circuit for the MAX1157/MAX1159/
MAX1175
MAX1157
MAX1159
MAX1175
ANALOG
INPUTAIN
AVDD
+5V ANALOG+5V DIGITAL
DVDD
D0–D1314-BIT
WIDE
μP DATA
BUS
10μF
0.1μF0.1μF
0.1μF
R/C
AGNDDGND
REFADJ
REF
EOC
RESET

Partno	Mfg	Dc	Qty	Available	Descript
MAX1157AEUI+ \|MAX1157AEUI	MAXIM	N/a	12	avai	14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1157AEUI+ \|MAX1157AEUI	MAXIM/DALLAS	N/a	12	avai	14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1159AEUI+ \|MAX1159AEUI	MAXIM	N/a	1	avai	14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range