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 ..
MAX115EAX ,2x4-Channel, Simultaneous-Sampling 12-Bit ADCsFeaturesThe MAX115/MAX116 are high-speed, multichannel, Four Simultaneous-Sampling T/H Amplifiers ..
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MAX11603EEE+ ,2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/8-/12-Channel, 2-Wire Serial 8-Bit ADCsApplicationsMedical InstrumentsBattery-Powered Test EquipmentPin Configurations and Typical Operati ..
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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
MAX3486CSA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3486CSA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX115CAX-MAX115EAX
2x4-Channel, Simultaneous-Sampling 12-Bit ADCs
________________General DescriptionThe MAX115/MAX116 are high-speed, multichannel,
12-bit data-acquisition systems (DAS) with simultane-
ous track/holds (T/Hs). These devices contain a 12-bit,
2µs, successive-approximation analog-to-digital con-
verter (ADC), a +2.5V reference, a buffered reference
input, and a bank of four simultaneous-sampling T/H
amplifiers that preserve the relative phase information
of the sampled inputs. The MAX115/MAX116 have two
multiplexed inputs for each T/H, allowing a total of eight
inputs. In addition, the converter is overvoltage tolerant
to ±17V. A fault condition on any channel will not dam-
age the IC. Available input ranges are ±5V (MAX115)
and ±2.5V (MAX116).
The parallel interface’s data access and bus release
timing specifications are compatible with most popular
digital signal processors and 16-bit/32-bit microproces-
sors. The MAX115/MAX116 conversion results can be
accessed without resorting to wait-states.
________________________ApplicationsMultiphase Motor Control
Power-Grid Synchronization
Power-Factor Monitoring
Digital Signal Processing
Vibration and Waveform Analysis
____________________________FeaturesFour Simultaneous-Sampling T/H Amplifiers with
Two Multiplexed Inputs (Eight Single-Ended
Inputs Total)2µs Conversion Time per Channel Throughput: 390ksps (1 Channel)
218ksps (2 Channels)
152ksps (3 Channels)
116ksps (4 Channels)Input Range: ±5V (MAX115)2.5V (MAX116)Fault-Protected Input Multiplexer (±17V)Internal +2.5V or External Reference OperationProgrammable On-Board SequencerHigh-Speed Parallel DSP InterfaceInternal 10MHz Clock
MAX115/MAX116
12-Bit ADCs
Pin Configuration
MAX115/MAX116
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(AVDD= +5V ±5%, AVSS= -5V ±5%, DVDD= +5V ±5%, VREFIN= +2.5V (external reference), AGND = DGND = 0, 4.7µF capacitor
from REFOUT to AGND, 0.1µF capacitor from REFIN to AGND, fCLK= 16MHz, external clock, 50% duty cycle. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°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.
AVDDto AGND...........................................................-0.3V to 6V
AVSSto AGND............................................................0.3V to -6V
DVDDto DGND...........................................................-0.3V to 6V
AGND to DGND.......................................................-0.3V to 0.3V
CH_ _ to AGND....................................................................±17V
REFIN, REFOUT to AGND..........................................-0.3V to 6V
Digital Inputs/Outputs to DGND..............-0.3V to (DVDD+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
36-Pin SSOP (derate 11.8mW/°C above +70°C)..........941mW
Operating Temperature Ranges
MAX115_CAX/MAX116_CAX...............................0°C to +70°C
MAX115_EAX/MAX116_EAX............................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)....................................300°C
MAX115/MAX116
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)(AVDD= +5V ±5%, AVSS= -5V ±5%, DVDD= +5V ±5%, VREFIN= +2.5V (external reference), AGND = DGND = 0, 4.7µF capacitor
from REFOUT to AGND, 0.1µF capacitor from REFIN to AGND, fCLK= 16MHz, external clock, 50% duty cycle. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
MAX115/MAX116
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)(AVDD= +5V ±5%, AVSS= -5V ±5%, DVDD= +5V ±5%, VREFIN= +2.5V (external reference), AGND = DGND = 0, 4.7µF capacitor
from REFOUT to AGND, 0.1µF capacitor from REFIN to AGND, fCLK= 16MHz, external clock, 50% duty cycle. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS(See Figure 4, AVDD= +5V, AVSS= -5V, DVDD= +5V, AGND = DGND = 0, TA= TMINto TMAX, Typical values are at TA= +25°C,
unless otherwise noted.)
MAX115/MAX116
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
TIMING CHARACTERISTICS (continued)(See Figure 4, AVDD= +5V, AVSS= -5V, DVDD= +5V, AGND = DGND = 0, TA= TMINto TMAX, Typical values are at TA= +25°C,
unless otherwise noted.)
Note 1:AVDD= +5V, AVSS= -5V, DVDD= +5V, VREFIN= 2.500V (external), VIN= ±5V (MAX115) or ±2.5V (MAX116).
Note 2:Integral nonlinearity is the analog value’s deviation at any code from its theoretical value after the full-scale range and
offset have been calibrated.
Note 3:CLK synchronized with CONVST.
Note 4:fIN= 10.06kHz, VIN= ±5V (MAX115) or ±2.5V (MAX116).
Note 5:First five harmonics.
Note 6:All inputs except CH1A driven with ±5V (MAX115) or ±2.5V (MAX116) 10.06kHz signal, CH1A connected to AGND and digi-
tized.
Note 7:AVDD= DVDD= +5V, AVSS= -5V, VIN= 0V (all channels).
Note 8:Temperature drift is defined as the change in output voltage from +25°C to TMINor TMAX. It is calculated as
TC = [∆REFOUT/REFOUT] / ∆T.
Note 9:See Figure 2.
Note 10:Defined as the change in positive full scale caused by a ±5% variation in the nominal supply voltage. Tested with one input
at full scale and all others at AGND. VREFIN= +2.5V (internal).
Note 11:Tested with all inputs connected to AGND. VREFIN= +2.5V (internal).
Note 12:The data access time is defined as the time required for an output to cross +0.8V or +2.0V. It is measured using the circuit
of Figure 1. The measured number is then extrapolated back to determine the value with a 25pF load.
Note 13:The bus relinquish time is derived from the measured time taken for the data outputs to change +0.5V when loaded with the
circuit of Figure 1. The measured number is then extrapolated back to remove the effects of charging and discharging the
120pF capacitor. The time given is the part’s true bus relinquish time, which is independent of the external bus loading capac-
itance.
_______________Detailed DescriptionThe MAX115/MAX116 use a successive-approximation
conversion technique and four simultaneous-sampling
track/hold (T/H) amplifiers to convert analog signals into
12-bit digital outputs. Each T/H has two multiplexed
inputs, allowing a total of eight inputs. Each T/H output
is converted and stored in memory to be accessed
sequentially by the parallel interface with successive
read cycles. The MAX115/MAX116 internal micro-
sequencer can be programmed to digitize one, two,
three, or four inputs sampled simultaneously from either
of the two banks of four inputs (Figure 2). The
MAX115/MAX116 can operate with either an external or
internal clock. For internal operation, connect CLK to
DVDD.
MAX115/MAX116
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
______________________________________________________________Pin Description
MAX115/MAX116
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
