MAX1115EKA+T-MAX1116EKA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1116EKA+T ,Single-Supply, Low-Power, Serial 8-Bit ADCsFeaturesThe MAX1115/MAX1116 low-power, 8-bit, analog-to-♦ Single Supplydigital converters (ADCs) fe ..
MAX1117EKA+T ,Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCsApplicationsOrdering InformationLow-Power, Handheld Portable DevicesPIN- TOP PART TEMP. RANGESystem ..
MAX1118EKA ,Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCsFeaturesThe MAX1117/MAX1118/MAX1119 low-power, 8-bit, Single Supplydual-channel, analog-to-digital ..
MAX1118EKA-T ,Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCsFeaturesThe MAX1117/MAX1118/MAX1119 low-power, 8-bit,♦ Single Supplydual-channel, analog-to-digital ..
MAX1119EKA+T ,Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCsELECTRICAL CHARACTERISTICS(V = +2.7V to +3.6V (MAX1117), V = +4.5V to +5.5V (MAX1119), V = REF = +2 ..
MAX111ACAP ,Low-Cost / 2-Channel / 14-Bit Serial ADCsELECTRICAL CHARACTERISTICS—MAX110(V = 5V ±5%, V = -5V ±5%, f = 1MHz, ‚ 2 mode (DV2 = 1), 81,920 CLK ..
MAX3468CSA+ ,+5V, Fail-Safe, 40Mbps, PROFIBUS RS-485/RS-422 Transceivers
MAX3471CUA ,1.6A / RS-485/RS-422 / Half-Duplex / Differential Transceiver for Battery-Powered Systems
MAX3471CUA ,1.6A / RS-485/RS-422 / Half-Duplex / Differential Transceiver for Battery-Powered Systems
MAX3471CUA+ ,1.6µA, RS-485/RS-422, Half Duplex, Differential Transceiver for Battery-Powered Systems
MAX3471CUA+T ,1.6µA, RS-485/RS-422, Half Duplex, Differential Transceiver for Battery-Powered Systems
MAX3471EUA ,1.6A / RS-485/RS-422 / Half-Duplex / Differential Transceiver for Battery-Powered Systems

MAX1115EKA+T-MAX1116EKA+T
Single-Supply, Low-Power, Serial 8-Bit ADCs
General Description
The MAX1115/MAX1116 low-power, 8-bit, analog-to-
digital converters (ADCs) feature an internal track/hold
(T/H), voltage reference, VDDmonitor, clock, and serial
interface. The MAX1115 is specified from +2.7V to
+5.5V, and the MAX1116 is specified from +4.5V to
+5.5V. Both parts consume only 175µA at 100ksps.
The full-scale analog input range is determined by the
internal reference of +2.048V (MAX1115) or +4.096V
(MAX1116). The MAX1115/MAX1116 also feature
AutoShutdown™ power-down mode which reduces
power consumption to <1µA when the device is not in
use. The 3-wire serial interface directly connects to
SPI™, QSPI™, and MICROWIRE™ devices without
external logic. Conversions up to 100ksps are per-
formed using an internal clock.
The MAX1115/MAX1116 are available in an 8-pin
SOT23 package with a footprint that is just 30% of an
8-pin SO.
________________________Applications
Low-Power, Hand-Held Portable Devices
System Diagnostics
Battery-Powered Test Equipment
Receive-Signal-Strength Indicators
4mA to 20mA Powered Remote Data-Acquisition
Systems
FeaturesSingle Supply
+2.7V to +3.6V (MAX1115)
+4.5V to +5.5V (MAX1116)Input Voltage Range: 0 to VREFInternal Track/Hold; 100kHz Sampling RateInternal Reference
+2.048V (MAX1115)
+4.096V (MAX1116)SPI/QSPI/MICROWIRE-Compatible Serial InterfaceSmall 8-Pin SOT23 PackageAutomatic Power-DownLow Power
175µA at 100ksps
18µA at +3V and 10ksps
1µA in Power-Down Mode
MAX1115/MAX1116
Single-Supply, Low-Power, Serial 8-Bit ADCs
SCLK
DOUT
CONVST
GND
I.C.
CH0
VDD
MAX1115
MAX1116
SOT23
TOP VIEW
I.C.
Pin Configuration
19-1822; Rev 1; 2/02
Ordering Information
PARTTEMP RANGEPIN-
PA CK A G E
TO PA RK
MAX1115EKA-40°C to +85°C8 SOT23AADU
MAX1116EKA-40°C to +85°C8 SOT23AADV
AutoShutdown is a trademark of Maxim Integrated Products.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
MAX1115/MAX1116
Single-Supply, Low-Power, Serial 8-Bit ADCs
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= +2.7V to +3.6V (MAX1115), VDD= +4.5V to +5.5V (MAX1116), TA= TMINto TMAX, unless otherwise noted.)
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.
VDDto GND...........................................................-0.3V to +6.0V
CH0 to GND...............................................-0.3V to (VDD+ 0.3V)
Digital Output to GND................................-0.3V to (VDD+ 0.3V)
Digital Input to GND..............................................-0.3V to +6.0V
Maximum Current into Any Pin.........................................±50mA
Continuous Power Dissipation (TA= +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range
MAX111_EKA..................................................-40°C to + 85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC ACCURACY
Resolution8Bits
Relative AccuracyINL(Note 1)±1LSB
Differential NonlinearityDNL±1LSB
Offset Error0.5LSB
Gain Error±5%FSR
Gain Temperature Coefficient90ppm/°C
VDD/2 Sampling Error±2±7%
DYNAMIC PERFORMANCE (25kHz sine-wave input, VIN = VREF (P-P), fSCLK = 5MHz, fSAMPLE = 100ksps, RIN = 100Ω)
Signal-to-Noise Plus DistortionSINAD48dB
Total Harmonic Distortion
(up to the 5th Harmonic)THD-69dB
Spurious-Free Dynamic RangeSFDR66dB
Small-Signal Bandwidthf-3dB4MHz
ANALOG INPUT
Input Voltage Range0VREFV
Input Leakage CurrentVCH = 0 or VDD±0.7±10µA
Input CapacitanceCIN18pF
INTERNAL REFERENCE
MAX11152.048VoltageVREFMAX11164.096V
POWER REQUIREMENTS
MAX11152.75.5Supply VoltageVDDMAX11164.55.5V
fSAMPLE = 10ksps1421MAX1115fSAMPLE = 100ksps135190
fSAMPLE = 10ksps1925MAX1116fSAMPLE = 100ksps182230
Supply Current (Note 2)IDD
Shutdown0.810
MAX1115/MAX1116
Single-Supply, Low-Power, Serial 8-Bit ADCs
Note 1:Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range and off-
set have been calibrated.
Note 2:Input = 0, with logic input levels of 0 and VDD.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply Rejection RatioPSRRFull-scale or zero input±0.5±1LSB/V
DIGITAL INPUTS (CNVST AND SCLK)
Input High VoltageVIH2V
Input Low VoltageVIL0.8V
Input HystersisVHYST0.2V
Input Current HighIIH±10µA
Input Current LowIIL±10µA
Input CapacitanceCIN2pF
DIGITAL OUTPUT (DOUT)
Output High VoltageVOHISOURCE = 2mAVDD - 0.5V
ISINK = 2mA0.4Output Low VoltageVOLISINK = 4mA0.8V
Three-State Leakage CurrentIL±0.01±10µA
Three-State Output CapacitanceCOUT4pF
TIMING CHARACTERISTICS (Figures 6a–6d)
CNVST High Timetcsh100ns
CNVST Low Timetcsl100ns
Conversion Timetconv7.5µs
Serial Clock High Timetch75ns
Serial Clock Low Timetcl75ns
Serial Clock Periodtcp200ns
Falling of CNVST to DOUT
ActivetcsdCLOAD = 100pF, Figure 1100ns
Serial Clock Falling Edge to
DOUTtcdCLOAD = 100pF10100ns
Serial Clock Rising Edge
To DOUT High-ZtchzCLOAD = 100pF, Figure 2100500ns
Last S er i al C l ock to N ext C N V S Tsuccessi ve conver si ons on C H 0) tccs50ns
ELECTRICAL CHARACTERISTICS (continued)
(VDD= +2.7V to +3.6V (MAX1115), VDD= +4.5V to +5.5V (MAX1116), TA= TMINto TMAX, unless otherwise noted.)
MAX1115/MAX1116
Single-Supply, Low-Power, Serial 8-Bit ADCs
Typical Operating Characteristics
(VDD= +3V (MAX1115), VDD= +5V (MAX1116), fscu= 5MHz, fsample= 100ksps, CLOAD= 100pF, TA = +25°C, unless otherwise
noted.)
INTEGRAL NONLINEARITY
vs. OUTPUT CODE
MAX1115 toc01
OUTPUT CODE
INL (LSB)-0.2
DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX1115 toc02
OUTPUT CODE
DNL (LSB)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1115 toc03
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (
SUPPLY CURRENT vs.
CONVERSION RATE
MAX1115 toc04
CONVERSION (ksps)
SUPPLY CURRENT (
MAX1116
VDD = +5V
MAX1115
VDD = +3V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1115 toc05
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
MAX1115
MAX1116
DOUT = 00000000
VDD = VDIGITAL INPUTS
SUPPLY CURRENT
vs. TEMPERATURE
MAX1115 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (
DOUT = 00000000
VDD = VREF = VDIGITAL INPUTS
MAX1115
VDD = +3V
MAX1116
VDD = +5V
CONVERSION TIME
vs. SUPPLY VOLTAGE
MAX1115 toc07
SUPPLY VOLTAGE (V)
CONVERSION TIME (
MAX1115 toc08
CONVERSION TIME
vs. TEMPERATURE
TEMPERATURE (°C)
CONVERSION TIME (VDD = +3V
VDD = +5V
GAIN ERROR vs.
SUPPLY VOLTAGE
MAX1115 toc09
SUPPLY VOLTAGE (V)
GAIN ERROR (%FSR)
MAX1116
VDD = +5V
MAX1115
VDD = +3V
MAX1115/MAX1116
Single-Supply, Low-Power, Serial 8-Bit ADCs
MAX1115 toc10
GAIN ERROR
vs. TEMPERATURE
TEMPERATURE (°C)
GAIN ERROR (%FSR)
MAX1116
VDD = +5V MAX1115
VDD = +3V
-2020k10k30k40k50k
FFT PLOT
MAX1115 toc11
ANALOG INPUT FREQUENCY (Hz)
AMPLITUDE (dB)
fSAMPLE = 100kHz
fIN = 25.1kHz
AIN = 0.9xVREF p-p
OFFSET ERROR vs.
SUPPLY VOLTAGE
MAX1115 toc12
SUPPLY VOLTAGE (V)
OFFSET ERROR (LSB)
MAX1116
VDD = +3V
MAX1115
VDD = +3V
OFFSET ERROR vs.
TEMPERATURE
MAX1115 toc13
TEMPERATURE (°C)
OFFSET ERROR (LSB)
MAX1116
VDD = +3V
MAX1115
VDD = +5V
10.5%
7.0%
3.5%
17.5%
21.0%
14.0%
MAX1115
REFERENCE VOLTAGE
vs. NUMBER OF PIECES
MAX1115 toc14
REFERENCE VOLTAGE (V)
7.0%
3.5%
14.0%
10.5%
17.5%
MAX1116
REFERENCE VOLTAGE
vs. NUMBER OF PIECES
MAX1115 toc15
REFERENCE VOLTAGE (V)
21.0%
Typical Operating Characteristics (continued)
(VDD= +3V (MAX1115), VDD= +5V (MAX1116), fscu= 5MHz, fsample= 100ksps, CLOAD= 100pF, TA = +25°C, unless otherwise
noted.)
MAX1115/MAX1116
Detailed Description
The MAX1115/MAX1116 ADCs use a successive-
approximation conversion technique and input
track/hold (T/H) circuitry to convert an analog signal to
an 8-bit digital output. The SPI/QSPI/MICROWIRE-
compatible interface directly connects to microproces-
sors (µPs) without additional circuitry (Figure 3).
Track/Hold
The input architecture of the ADC is illustrated in the
equivalent-input circuit shown in Figure 4 and is com-
posed of the T/H, input multiplexer, input comparator,
switched capacitor DAC, and auto-zero rail.
The acquisition interval begins with the falling edge of
CNVST. During the acquisition interval, the analog input
(CH0) is connected to the hold capacitor (CHOLD).
Once the acquisition is complete, the T/H switch opens
and CHOLDis connected to GND, which retains the
charge on CHOLDas a sample of the signal at the ana-
log input.
Sufficiently low source impedance is required to ensure
an accurate sample. A source impedance of <1.5kΩis
recommended for accurate sample settling. A 100pF
capacitor at the ADC inputs also improves the accuracy
of an input sample.
Conversion Process
The MAX1115/MAX1116 conversion process is internal-
ly timed. The total acquisition and conversion process
takes <7.5µs. Once an input sample has been
acquired, the comparator’s negative input is then con-
nected to an auto-zero supply. Since the device
requires only a single supply, the negative input of the
comparator is set to equal VDD/2. The capacitive DAC
restores the positive input to VDD/2 within the limits of 8-
bit resolution. This action is equivalent to transferring a
charge QIN= 16pF ✕VINfrom CHOLDto the binary-
weighted capacitive DAC, which forms a digital repre-
sentation of the analog-input signal.
Single-Supply, Low-Power, Serial 8-Bit ADCs
Pin Description
PINNAMEFUNCTION
1VDDPositive Supply VoltageCH0Analog Voltage Input
3, 5I.C.Internally Connected. Connect to ground.GNDGroundCNVSTConvert/Start Input. CNVST initiates a power-up and starts a conversion on its falling edge.DOUT
Serial Data Output. Data is clocked out on the falling edge of SCLK. DOUT goes low at the start of a
conversion and presents the MSB at the completion of a conversion. DOUT goes high impedance
once data has been fully clocked out.SCLKSerial Clock. Used for clocking out data on DOUT.
VDD
3kΩ
CLOAD
GND
DOUT
CLOAD
GND
3kΩ
DOUT
a) VOL TO VOHb) HIGH-Z TO VOL AND VOH TO VOL
VDD
3kΩ
CLOAD
GND
DOUT
CLOAD
GND
3kΩ
DOUT
a) VOH TO HIGH-Zb) VOL TO HIGH-Z
Figure 1. Load Circuits for Enable TimeFigure 2. Load Circuits for Disable Time

Partno	Mfg	Dc	Qty	Available	Descript
MAX1115EKA+T	MAXIM	N/a	708	avai	Single-Supply, Low-Power, Serial 8-Bit ADCs
MAX1116EKA+T	N/A	N/a	2500	avai	Single-Supply, Low-Power, Serial 8-Bit ADCs