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MAX1178ACUP+ |MAX1178ACUPMAXIMN/a290avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1178AEUP+ |MAX1178AEUPMAXIM/DALLASN/a2avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1178AEUP+ |MAX1178AEUPMAXIMN/a300avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188ACUP+ |MAX1188ACUPMAXIMN/a100avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188ACUP+ |MAX1188ACUPMAXIM/DALLASN/a14avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188AEUP+ |MAX1188AEUPMAXIM/DALLASN/a18avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188AEUP+ |MAX1188AEUPMAXIMN/a300avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188BCUPMAXIMN/a330avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188BCUP+ |MAX1188BCUPMAXIMN/a330avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188BCUP+ |MAX1188BCUPMAXIM/DALLASN/a10avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1188BEUP+ |MAX1188BEUPMAXIMN/a80avai16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range


MAX1188BCUP ,16-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 ..
MAX1188BCUP+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Rangeapplications.Ordering InformationExcellent AC performance (THD = -100dB) and DCaccuracy (±2 LSB INL ..
MAX1188BCUP+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Rangeapplications.RANGE (V)The MAX1178/MAX1188 are available in a 20-pinMAX1178ACUP 0°C to +70°C 20 TS ..
MAX1188BEUP+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeApplicationsTemperature Sensing and Monitoring+5V ANALOG +5V DIGITALIndustrial Process ControlI/O M ..
MAX1189ACUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeMAX1179/MAX1187/MAX118919-2675; Rev 1; 1/0316-Bit, 135ksps, Single-Supply ADCs withBipolar Analog I ..
MAX1189AEUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeApplicationsD14 7 22 D1D15 8 21 D0Temperature Sensing and MonitoringR/C 9 20 DVDDIndustrial Process ..
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MAX1178ACUP+-MAX1178AEUP+-MAX1188ACUP+-MAX1188AEUP+-MAX1188BCUP-MAX1188BCUP+-MAX1188BEUP+
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.
Applications

Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
Features
Byte-Wide Parallel InterfaceAnalog Input Voltage Range: ±10V, ±5VSingle +4.75V to +5.25V Analog Supply VoltageInterface with +2.7V to +5.25V Digital Logic±2 LSB INL ±1 LSB DNL Low Supply Current (max)
2.9mA (External Reference)
3.8mA (Internal Reference)
5µA AutoShutdown Mode
Small Footprint20-Pin TSSOP Package
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range

D0–D7
D8–D15
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
MAX1178
MAX1188
Typical Operating Circuit

19-2755; Rev 1; 8/03
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering Information
PART TEMP RANGE PIN-
PACKAGE
INPUT
VOLTAGE
RANGE (V)
MAX1178ACUP
0°C to +70°C20 TSSOP±5
MAX1178BCUP 0°C to +70°C20 TSSOP±5
MAX1178CCUP 0°C to +70°C20 TSSOP±5
MAX1178AEUP-40°C to +85°C20 TSSOP±5
MAX1178BEUP-40°C to +85°C20 TSSOP±5
MAX1178CEUP-40°C to +85°C20 TSSOP±5
Pin Configuration and Functional Diagram appear at end of
data sheet.
Ordering Information continued at end of data sheet.
MAX1178/MAX1188
16-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, 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)
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
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

ResolutionRES16Bits
MAX11_ _A-1+1
MAX11_ _B-1.0+1.5Differential NonlinearityDNLNo missing codes
over temperature
MAX11_ _C-1+2
LSB
MAX11_ _A-2+2
MAX11_ _B-2+2Integral NonlinearityINL
MAX11_ _C-4+4
LSB
RMS noise, external reference0.6Transition NoiseInternal reference0.75LSBRMS
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 DistortionSINAD8690dB
Signal-to-Noise RatioSNR8791dB
Total Harmonic DistortionTHD-100-92dB
Spurious-Free Dynamic RangeSFDR92103dB
ANALOG INPUT

MAX1178-5+5Input RangeVAINMAX1188-10+10V
Normal operation5.36.99.2MAX1178Shutdown mode3.0
Normal operation7.81013.0Input ResistanceRAIN
MAX1188Shutdown mode6.0
MAX1178/MAX1188
16-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

Normal operation-1.8+0.4MAX1178,
-5V ≤ VAIN ≤ +5VShutdown mode-1.8+1.8
Normal operation-1.8+1.2Input CurrentIAIN
MAX1188,
-10V ≤ VAIN ≤ +10VShutdown mode-1.8+1.8
MAX1178, VAIN = +5V, shutdown mode to
operating mode11.4
Input Current Step at Power-UpIPU
MAX1188, VAIN = +10V, shutdown mode to
operating mode0.50.7
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
Tri-State Output LeakageIOZ±10µA
Tri-State Output CapacitanceCOZ15pF
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
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 Low (Note 2)tCSLDVDD = 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 SUPPLIES

Analog Supply VoltageAVDD4.755.25V
Digital Supply VoltageDVDD2.705.25V
External reference, 135ksps45.3Analog Supply CurrentIAVDDInternal reference, 135ksps5.26.2mA
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 5.25V3.5LSB
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.
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
INL vs. CODE

MAX1178/88 toc01
INL (LSB)20,00030,00040,00010,00050,00060,000
CODE
DNL vs. CODE

MAX1178/88 toc02
DNL (LSB)20,00010,00040,00050,00060,00030,000
CODE
SUPPLY CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1178/88 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
5.25V
5.0V
4.75V
fSAMPLE = 135ksps
SHUTDOWN MODE
BETWEEN CONVERSIONS
SUPPLY CURRENT (AVDD + DVDD)
vs. SAMPLE RATE

MAX1178/88 toc04
SAMPLE RATE (ksps)
SUPPLY CURRENT (mA)
VAIN = 0V
STANDBY MODE
SHUTDOWN MODE
SHUTDOWN CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1178/88 toc05
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (
NO CONVERSIONS
OFFSET ERROR vs. TEMPERATURE
MAX1178/88 toc06
TEMPERATURE (°C)
OFFSET ERROR (mV)
MAX1188MAX1178
GAIN ERROR vs. TEMPERATURE
MAX1178/88 toc07
TEMPERATURE (°C)
GAIN ERROR (%FSR)
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1178/88 toc08
TEMPERATURE (°C)
INTERNAL REFERENCE (V)
FFT AT 1kHz
MAX1178/88 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)
fSAMPLE = 131ksps
Typical Operating Characteristics

(Typical Operating Circuit, AVDD= DVDD= +5V, external reference = +4.096V, CREF= 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD,
CLOAD= 20pF. Typical values are at TA= +25°C, unless otherwise noted.)
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Typical Operating Characteristics (continued)

(Typical Operating Circuit, AVDD= DVDD= +5V, external reference = +4.096V, CREF= 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD,
CLOAD= 20pF. Typical values are at TA= +25°C, unless otherwise noted.)
SINAD vs. FREQUENCY

MAX1178/88 toc10
FREQUENCY (kHz)
SINAD (dB)
fSAMPLE = 131ksps
SFDR vs. FREQUENCY

MAX1178/88 toc11
FREQUENCY (kHz)
SFDR (dB)
fSAMPLE = 131ksps
THD vs. FREQUENCY

MAX1178/88 toc12
FREQUENCY (kHz)
THD (dB)
fSAMPLE = 131ksps
Pin Description
PINNAMEFUNCTION
D4/D12Tri-State Digital-Data OutputD5/D13Tri-State Digital-Data OutputD6/D14Tri-State Digital-Data OutputD7/D15Tri-State Digital-Data Output. D15 is the MSB.
5R/C
Read/Convert Input. Power up and put the MAX1178/MAX1188 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 Operation

The MAX1178/MAX1188 use a successive-approxima-
tion (SAR) conversion technique with an inherent track-
and-hold (T/H) stage to convert an analog input into a
16-bit digital output. Parallel outputs provide a high-
speed interface to microprocessors (µPs). The Func-
tional Diagramshows a simplified internal architecture of
the MAX1178/MAX1188. Figure 3 shows a typical oper-
ating circuit for the MAX1178/MAX1188.
Analog Input
Input Scaler

The MAX1178/MAX1188 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 digital-to-analog converter
(DAC). The MAX1178 input voltage range is ±5V, while
the MAX1188 input voltage range is ±10V. Figure 4
shows the equivalent input circuit of the MAX1178/
MAX1188. 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 (Figure 4). In hold mode, the T/H switch-
es 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 CHOLDrepre-
sents a sample of the input. In hold mode, the capaci-
tive DAC adjusts during the remainder of the conversion
time to restore node T/H OUT to zero within the limits of
16-bit resolution. Force CSlow to put valid data on the
bus after conversion is complete.
MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Pin Description (continued)
PINNAMEFUNCTION
HBEN
High-Byte Enable Input. Used to multiplex the 16-bit conversion result.
1: MSB available on the data bus.
0: LSB 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/D8Tri-State Digital-Data Output. D0 is the LSB.D1/D9Tri-State Digital-Data OutputD2/D10Tri-State Digital-Data OutputD3/D11Tri-State Digital-Data Output
DGND
1mACLOAD = 20pF
DO–D15DO–D15
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
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