MAX1187BCUI ,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 ..
MAX1187BCUI+ ,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 ..
MAX1187BEUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeFeaturesThe MAX1179/MAX1187/MAX1189 16-bit, low-power,♦ Analog Input Voltage Range: ±10V, ±5V, or 0 ..
MAX1188ACUP+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeFeaturesThe MAX1178/MAX1188 16-bit, low-power, successive- ♦ Byte-Wide Parallel Interfaceapproximat ..
MAX1188ACUP+ ,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 ..
MAX1188AEUP+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeFeaturesThe MAX1178/MAX1188 16-bit, low-power, successive- ♦ Byte-Wide Parallel Interfaceapproximat ..
MAX3490EESA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490EESA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490EESA+ ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490ESA , 3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490ESA , 3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490ESA , 3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX1187BCUI
16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range19-2675; Rev 1; 1/03
General DescriptionThe MAX1179/MAX1187/MAX1189 16-bit, low-power,
successive-approximation analog-to-digital converters
(ADCs) feature automatic power-down, a factory-
trimmed internal clock, and a 16-bit 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 MAX1179 accepts a bipolar input voltage range of
±5V. The MAX1187 accepts an analog input voltage
range from 0 to +10V, while the MAX1189 accepts a
bipolar analog input voltage range of ±10V. 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
MAX1179/MAX1187/MAX1189 are ideal for high-perfor-
mance, battery-powered data-acquisition applications.
Excellent AC performance (THD = -100dB) and DC
accuracy (±2LSB INL) make the MAX1179/MAX1187/
MAX1189 ideal for industrial process control, instrumen-
tation, and medical applications.
The MAX1179/MAX1187/MAX1189 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.
ApplicationsTemperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
FeaturesAnalog Input Voltage Range: ±10V, ±5V, or 0 to 10V16-Bit Wide Parallel InterfaceSingle +4.75V to +5.25V Analog Supply VoltageInterfaces with +2.7V to +5.25V Digital Logic±2LSB INL (max)±1LSB DNL (max)Low Supply Current (MAX1189)
5.3mA (External Reference)
6.2mA (Internal Reference)
5µA AutoShutdown ModeSmall Footprint
28-Pin TSSOP Package
Ordering Information
Pin ConfigurationAutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet.
MAX1179/MAX1187/MAX1189
16-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, 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.)
MAX1179/MAX1187/MAX1189
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.)
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
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.)
TIMING CHARACTERISTICS (Figures 1 and 2)(AVDD= +5V ±5V, DVDD= +2.7V to AVDD, external reference = +4.096V, CREF= 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, CLOAD
= 20pF, TA= TMINto TMAX.)
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
INL vs. CODEMAX1179/87/89 toc01
CODE
INL (LSB)
DNL vs. CODE
MAX1179/87/89 toc02
CODE
DNL (LSB)
SUPPLY CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1179/87/89 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (mA)40-20020
SUPPLY CURRENT (AVDD + DVDD)
vs. SAMPLE RATE
MAX1179/87/89 toc04
SAMPLE RATE (ksps)
SUPPLY CURRENT (mA)
GAIN ERROR
vs. TEMPERATURE
MAX1179/87/89 toc07
TEMPERATURE (°C)
GAIN ERROR (%FSR)
SHUTDOWN CURRENT (AVDD + DVDD)
vs. TEMPERATUREMAX1179/87/89 toc05
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (40-20020
OFFSET ERROR vs. TEMPERATURE
MAX1179/87/89 toc06
TEMPERATURE (°C)
OFFSET ERROR (mV)40-20020
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1179/87/89 toc08
TEMPERATURE (°C)
INTERNAL REFERENCE (V)
FFT AT 1kHzMAX
1179/87/89 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)20
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)
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
SINAD vs. FREQUENCYMAX1179/87/89 toc10
FREQUENCY (kHz)
SINAD (dB)
SPURIOUS-FREE DYNAMIC RANGE
vs. FREQUENCY
MAX1179/87/89 toc11
FREQUENCY (kHz)
SFDR (dB)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX1179/87/89 toc12
FREQUENCY (kHz)
THD (dB)
Typical 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)
Detailed Description
Converter OperationThe MAX1179/MAX1187/MAX1189 use a successive-
approximation (SAR) conversion technique with an
inherent track-and-hold (T/H) stage to convert an ana-
log input into a 16-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
MAX1179/MAX1187/MAX1189. Figure 3 shows a typical
application circuit for the MAX1179/MAX1187/MAX1189.
Analog Input
Input ScalerThe MAX1179/MAX1187/MAX1189 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 MAX1179 input
voltage range is ±5V, while the MAX1189 input voltage
range is ±10V. The MAX1187 has a unipolar input volt-
age range of 0 to +10V. Figure 4 shows the equivalent
input circuit of the MAX1179/MAX1187/MAX1189. This
circuit limits the current going into or out of AIN to less
than 1.8mA.
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
MAX1179/MAX1187/MAX1189
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 a 16-bit resolution. Force CSlow to put
valid data on the bus after conversion is complete.
Power-Down ModesSelect standby mode or shutdown mode with R/Cduring
the second falling edge of CS(see SelectingStandby or
Shutdown Modesection). The MAX1179/MAX1187/
MAX1189 automatically enter either standby mode (ref-
erence 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 ClockThe MAX1179/MAX1187/MAX1189 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
MAX1179/MAX1187/MAX1189 (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 (CS) is
ignored if R/Cis high. The MAX1179/MAX1187/
MAX1189 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. Reset the MAX1179/MAX1187/ MAX1189 by
toggling RESET with CShigh. The next falling edge ofbegins acquisition.
Selecting Standby or Shutdown ModeThe MAX1179/MAX1187/MAX1189 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
powers down the reference and reference buffer after
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
