MAX1174BCUP+ ,14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeFeaturesThe MAX1156/MAX1158/MAX1174 14-bit, low-power,♦ Byte-Wide Parallel Interfacesuccessive-appr ..
MAX1174BCUP+ ,14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Rangeapplications.MAX1156ACUP 0°C to +70°C 20 TSSOP 0 to +10VThe MAX1156/MAX1158/MAX1174 are available i ..
MAX1177ACUP ,16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input RangeApplicationsTypical Operating CircuitTemperature Sensing and MonitoringIndustrial Process Control+5 ..
MAX1177ACUP+ ,16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input RangeApplicationsTypical Operating CircuitTemperature Sensing and MonitoringIndustrial Process Control+5 ..
MAX1177AEUP ,16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input RangeELECTRICAL CHARACTERISTICS(AV = DV = +5V ±5%, external reference = +4.096V, C = 10µF, C = 0.1µF, V ..
MAX1177AEUP+ ,16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Rangefeatures a separate digital supply input for direct♦ ±3 LSB INL interface with +2.7V to +5.25V digi ..
MAX3488ECSA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3488ECSA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3488EESA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3488EESA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3488EESA+ ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3488EESA+T ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX1158ACUP+-MAX1174BCUP+
14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
General DescriptionThe MAX1156/MAX1158/MAX1174 14-bit, low-power,
successive-approximation analog-to-digital converters
(ADCs) feature automatic power-down, a factory-
trimmed internal clock, and a byte-wide parallel inter-
face. 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 MAX1156 accepts a 0 to +10V analog input volt-
age range. The MAX1158 accepts a ±10V bipolar ana-
log input voltage range, while the MAX1174 accepts a
±5V bipolar analog input voltage range. 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 (typ)
at 10ksps.
The MAX1156/MAX1158/MAX1174 are ideal for high-
performance, battery-powered, data-acquisition appli-
cations. Excellent AC performance (THD = -100dB) and
DC accuracy (±1LSB INL) make the MAX1156/
MAX1158/MAX1174 ideal for industrial process control,
instrumentation, and medical applications.
The MAX1156/MAX1158/MAX1174 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.
ApplicationsTemperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
FeaturesByte-Wide Parallel InterfaceAnalog Input Voltage Range: ±10V, ±5V, 0 to 10VSingle +4.75V to +5.25V Analog Supply VoltageInterface with +2.7V to +5.25V Digital Logic±1LSB INL (max)±1LSB DNL (max)Low Supply Current (max)
2.9mA (External Reference)
3.8mA (Internal Reference)
5µA AutoShutdown ModeSmall Footprint20-Pin TSSOP Package
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input RangeD0–D7
D8–D13
μP DATA
BUS
AVDDDVDD
AGNDDGND
+5V ANALOG+5V DIGITAL
ANALOG INPUTAIN
HBEN
EOC
R/CREF
REFADJ
HIGH
BYTE
LOW
BYTE
10μF0.1μF
0.1μF0.1μF
MAX1156
MAX1158
MAX1174
ypical Operating Circuit19-2736; Rev 0; 1/03
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering InformationPART TEMP RANGE PIN- PACKAGEINPUT
VOLTAGE
RANGE
MAX1156ACUP 0°C to +70°C20 TSSOP0 to +10V
MAX1156BCUP0°C to +70°C20 TSSOP0 to +10V
MAX1156AEUP-40°C to +85°C20 TSSOP0 to +10V
MAX1156BEUP-40°C to +85°C20 TSSOP0 to +10V
Pin Configuration appears at end of data sheet.
Ordering Information continued at end of data sheet.
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
ABSOLUTE MAXIMUM RATINGSStresses 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, HBEN 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)
20-Pin TSSOP (derate 10.9mW/°C above +70°C).......879mW
Operating Temperature Range
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
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 ACCURACYResolutionRES14Bits
Differential NonlinearityDNLNo missing codes over temperature-1+1LSB
MAX11_ _A-1+1Integral NonlinearityINLMAX11_ _B-2+2LSB
RMS noise, external reference0.32Transition NoiseInternal reference0.34LSBRMS
Offset Error-100+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 INPUTMAX11560+10
MAX1158-10+10Input RangeVAIN
MAX1174-5+5
MAX1156/MAX1174Normal operation5.36.99.2
MAX1156Shutdown mode5.3
MAX1174Shutdown mode3.0
Normal operation7.81013.0
Input ResistanceRAIN
MAX1158Shutdown mode6.0
MAX1156/MAX1158/MAX1174
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.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX1156, 0 ≤ VAIN ≤ +10V-0.1+2.0
Normal operation-1.8+1.2MAX1158,
-10V ≤ VAIN ≤ +10VShutdown mode-1.8+1.8
Normal operation-1.8+0.4
Input CurrentIAIN
MAX1174,
-5V ≤ VAIN ≤ +5VShutdown mode-1.8+1.8
MAX1158, VAIN = +10V, shutdown mode to
operating mode0.50.7
Input Current Step at Power-UpIPU
MAX1174, VAIN = +5V, shutdown mode to
operating mode11.4
Input CapacitanceCIN10pF
INTERNAL REFERENCEREF Output VoltageVREF4.0564.0964.136V
REF Output Tempco±35ppm/°C
REF Short-Circuit CurrentIREF-SC±10mA
EXTERNAL REFERENCEREF 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/OUTPUTSOutput 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
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
TIMING CHARACTERISTICS (Figures 1 and 2)(AVDD= +4.75V to +5.25V ±5%, DVDD= +2.7V to AVDD, external reference = +4.096V, CREF= 10µF, CREFADJ= 0.1µF, VREFADJ=
AVDD, CLOAD= 20pF, TA= TMINto TMAX.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMaximum 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
DVDD = +4.75V to +5.25V40HBEN Transition to Output Data
ValidtDO1DVDD = +2.7V to +5.25V80ns
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 SUPPLIESAnalog Supply VoltageAVDD4.755.25V
Digital Supply VoltageDVDD2.705.25V
MAX11562.9External reference,
135kspsMAX1158/MAX117445.3
MAX11563.8Analog Supply CurrentIAVDD
Internal reference,
135kspsMAX1158/MAX11745.26.2
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
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.
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
INL vs. CODEMAX1156/58/74 toc01
INL (LSB)400060008000200010000120001400016000
CODE
DNL vs. CODEMAX1156/58/74 toc02
DNL (LSB)400060008000200010000120001400016000
CODE
SUPPLY CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1156/58/74 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
5.25V
5.0V
4.75V
fSAMPLE = 135ksps
SHUTDOWN MODE
BETWEEN CONVERSIONS
SUPPLY CURRENT (AVDD + DVDD)
vs. SAMPLE RATEMAX1156/58/74 toc04
SAMPLE RATE (ksps)
SUPPLY CURRENT (mA)
VAIN = 0V
SHUTDOWN MODE
STANDBY MODE
SHUTDOWN CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1156/58/74 toc05
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (
NO CONVERSIONS
OFFSET ERROR vs. TEMPERATURE
MAX1156/58/74 toc06
TEMPERATURE (°C)
OFFSET ERROR (mV)
MAX1174
MAX1158MAX1156
GAIN ERROR vs. TEMPERATURE
MAX1156/58/74 toc07
TEMPERATURE (°C)
GAIN ERROR (%FSR)
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1156/58/74 toc08
TEMPERATURE (°C)
INTERNAL REFERENCE (V)
FFT AT 1kHz
MAX1156/58/74 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)
fSAMPLE = 131ksps
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)
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Rangeypical Operating Characteristics (continued)(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)
SINAD vs. FREQUENCYMAX1156/58/74 toc10
FREQUENCY (kHz)
SINAD (dB)
fSAMPLE = 131ksps
SFDR vs. FREQUENCYMAX1156/58/74 toc11
FREQUENCY (kHz)
SFDR (dB)
fSAMPLE = 131ksps
THD vs. FREQUENCYMAX1156/58/74 toc12
FREQUENCY (kHz)
THD (dB)
fSAMPLE = 131ksps
Pin Description
PINNAMEFUNCTIOND4/D12Three-State Digital Data OutputD5/D13Three-State Digital Data Output. D13 is the MSB.D6/0Three-State Digital Data OutputD7/0Three-State Digital Data Output
5R/C
Read/Convert Input. Power up and put the MAX1156/MAX1158/MAX1174 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.
7AVDDAnalog Supply Input. Bypass with a 0.1µF capacitor to AGND.AGNDAnalog Ground. Primary analog ground (star ground).AINAnalog InputAGNDAnalog Ground. Connect pin 10 to pin 8.REFADJReference 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 for internal reference mode.
External reference input when in external reference mode.
Detailed Description
Converter OperationThe MAX1156/MAX1158/MAX1174 use a successive-
approximation (SAR) conversion technique with an
inherent track-and-hold (T/H) stage to convert an ana-
log input into a 14-bit digital output. Parallel outputs
provide a high-speed interface to microprocessors
(µPs). The Functional Diagramshows a simplified inter-
nal architecture of the MAX1156/MAX1158/MAX1174.
Figure 3 shows a typical application circuit for the
MAX1156/MAX1158/MAX1174.
Analog Input
Input ScalerThe MAX1156/MAX1158/MAX1174 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 sup-
ply. The input scaler attenuates and shifts the analog
input to match the input range of the internal DAC. The
MAX1156 has a unipolar input voltage range of 0 to
+10V. The MAX1158 input voltage range is ±10V while
the MAX1174 input voltage range is ±5V. Figure 4
shows the equivalent input circuit of the MAX1156/
MAX1158/MAX1174. This circuit limits the current going
into or out of AIN to less than 1.8mA.
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.
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Pin Description (continued)
PINNAMEFUNCTIONHBEN
High-Byte Enable Input. Used to multiplex the 14-bit conversion result.
1: Most significant byte available on the data bus.
0: Least significant byte available on the data bus.CS
Convert Start. The first falling edge of CS powers up the device and enables acquire mode 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.D0/D8Three-State Digital Data Output. D0 is the LSB.D1/D9Three-State Digital Data OutputD2/D10Three-State Digital Data OutputD3/D11Three-State Digital Data Output
DGND
1mACLOAD = 20pF
DO–D13DO–D13
CLOAD = 20pF
1mA
DGND
DVDD
a) HIGH-Z TO VOH,
VOL TO VOH, AND
VOH TO HIGH-Z
b) HIGH-Z TO VOL,
VOH TO VOL, AND
VOL TO HIGH-Z
Figure 1. Load Circuits
MAX1156/MAX1158/MAX1174
Power-Down ModesSelect standby mode or shutdown mode with the R/C
bit during the second falling edge of CS(see the
Selecting Standby or Shutdown Modesection). The
MAX1156/MAX1158/MAX1174 automatically enter
either standby mode (reference and buffer on) or shut-
down (reference and buffer off) after each conversion,
depending on the status of R/Cduring the second
falling edge of CS.
Internal ClockThe MAX1156/MAX1158/MAX1174 generate an internal
conversion clock to free the microprocessor from the
burden of running the SAR conversion clock. Total con-
version time (tCONV) 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
MAX1156/MAX1158/MAX1174 (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 is ignored
if R/Cis high. The MAX1156/MAX1158/MAX1174 need
at least 12ms (CREFADJ= 0.1µF, CREF= 10µF) for the
internal reference to wake up and settle before starting
the conversion, if powering up from shutdown.
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input RangeR/CREF POWER-
DOWN CONTROL
EOC
tACQ
tCONV
tCSHtCSL
tDH
tDO
tEOCtDStDV
HBEN
D7/D15–D0/D8HIGH/LOW
BYTE VALID
HIGH/LOW
BYTE VALID
tDOtDO1
HIGH-Z
tBRHIGH-Z
Figure 2. MAX1156/MAX1158/MAX1174 Timing Diagram
D0–D7
D8–D13
μP DATA
BUS
AVDDDVDD
AGNDDGND
+5V ANALOG+5V DIGITAL
ANALOG INPUTAIN
HBEN
EOC
R/CREF
REFADJ
HIGH
BYTE
LOW
BYTE
10μF0.1μF
0.1μF0.1μF
MAX1156
MAX1158
MAX1174
Figure 3. Typical Application Circuit for the MAX1156/MAX1158/
MAX1174
