MAX1089EKA+T ,150ksps / 10-Bit / 2-Channel Single-Ended / and 1-Channel True-Differential ADCs in SOT23ELECTRICAL CHARACTERISTICS(V = +2.7V to +3.6V, V = +2.5V for MAX1087/MAX1089, or VDD = +4.75V to +5 ..
MAX1089ETA+ ,150ksps, 10-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs in SOT23 and TDFNELECTRICAL CHARACTERISTICS(V = +2.7V to +3.6V, V = +2.5V for MAX1087/MAX1089, or VDD = +4.75V to +5 ..
MAX1090ACEI ,400ksps / +5V / 8-/4-Channel / 10-Bit ADCs with +2.5V Reference and Parallel InterfaceMAX1090/MAX109219-1640; Rev 0; 1/00400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and ..
MAX1090BCEI+ ,400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel InterfaceFeaturesThe MAX1090/MAX1092 low-power, 10-bit analog-to-♦ 10-Bit Resolution, ±0.5 LSB Linearitydigi ..
MAX1090BEEI ,400ksps / +5V / 8-/4-Channel / 10-Bit ADCs with +2.5V Reference and Parallel InterfaceFeaturesThe MAX1090/MAX1092 low-power, 10-bit analog-to- 10-Bit Resolution, ±0.5LSB Linearitydigit ..
MAX1091ACEI ,250ksps / +3V / 8-/4-Channel / 10-Bit ADCs with +2.5V Reference and Parallel Interfaceapplications or for other circuits with demand-ing power consumption and space requirements.TOP VIE ..
MAX339CPE ,Dual 4-channel, low-leakage, CMOS analog multiplexer.ApplicationsMAX338MJE -55°C to +125°C 16 CERDIP**Data-Acquisition Systems Sample-and-Hold CircuitsO ..
MAX339CSE ,Dual 4-channel, low-leakage, CMOS analog multiplexer.ELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +15V, V- = -15V, GND = 0V, VAH = +2.4V, VAL = +0.8V, ..
MAX339CSE+ ,8-Channel/Dual 4-Channel, Low-Leakage, CMOS Analog MultiplexersGeneral DescriptionThe MAX338/MAX339 are monolithic, CMOS analog♦ On-Resistance, <400Ω maxmultiplex ..
MAX339EPE ,Dual 4-channel, low-leakage, CMOS analog multiplexer.General Description ________
MAX339EPE+ ,8-Channel/Dual 4-Channel, Low-Leakage, CMOS Analog MultiplexersMAX338/MAX33919-0272; Rev 4; 4/128-Channel/Dual 4-Channel,Low-Leakage, CMOS Analog Multiplexers____ ..
MAX339ESE ,Dual 4-channel, low-leakage, CMOS analog multiplexer.FeaturesThe MAX338/MAX339 are monolithic, CMOS analog' On-Resistance, <400Ω maxmultiplexers (muxes) ..
MAX1087EKA-T-MAX1089EKA+T
150ksps / 10-Bit / 2-Channel Single-Ended / and 1-Channel True-Differential ADCs in SOT23
General DescriptionThe MAX1086–MAX1089 are low-cost, micropower, ser-
ial output 10-bit analog-to-digital converters (ADCs)
available in a tiny 8-pin SOT23. The MAX1086/MAX1088
operate with a single +5V supply. The MAX1087/MAX1089
operate with a single +3V supply. The devices feature a
successive-approximation ADC, automatic shutdown,
fast wake-up (1.4µs), and a high-speed 3-wire inter-
face. Power consumption is only 0.5mW (VDD= +2.7V)
at the maximum sampling rate of 150ksps.
Autoshutdown™ (0.1µA) between conversions results in
reduced power consumption at slower throughput
rates.
The MAX1086/MAX1087 provide 2-channel, single-
ended operation and accept input signals from 0 to
VREF. The MAX1088/MAX1089 accept true-differential
inputs ranging from 0 to VREF. Data is accessed using
an external clock through the 3-wire SPI™, QSPI™, and
MICROWIRE™–compatible serial interface. Excellent
dynamic performance, low-power, ease of use, and
small package size, make these converters ideal for
portable battery-powered data acquisition applications,
and for other applications that demand low power con-
sumption and minimal space.
ApplicationsLow Power Data Acquisition
Portable Temperature Monitors
Flowmeters
Touch Screens
FeaturesSingle-Supply Operation
+3V(MAX1087/MAX1089)
+5V(MAX1086/MAX1088)AutoShutdown Between ConversionsLow Power
200µA at 150ksps
130µA at 100ksps
65µA at 50ksps
13µA at 10ksps
1.5µA at 1ksps
0.2µA in ShutdownTrue-Differential Track/Hold, 150kHz Sampling RateSoftware-Configurable Unipolar/Bipolar
Conversion (MAX1088/MAX1089 only) SPI, QSPI, MICROWIRE–Compatible Interface for
DSPs and ProcessorsInternal Conversion Clock8-Pin SOT23 Package
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
Pin Configuration19-2036; Rev 0; 5/01
Ordering InformationAutoShutdown is a trademark of Maxim Integrated Products.
SPI and QSPI are trademarks of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +2.7V to +3.6V, VREF= +2.5V for MAX1087/MAX1089, or VDD= +4.75V to +5.25V, VREF= +4.096V for MAX1086/MAX1088,
0.1µF capacitor at REF, fSCLK= 8MHz (50% duty cycle), AIN- = GND for MAX1088/MAX1089. TA= TMINto TMAX,unless otherwise
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 +6V
CNVST, SCLK, DOUT to GND......................-0.3V to (VDD+0.3V)
REF, AIN1(AIN+), AIN2(AIN-) to GND..........-0.3V to (VDD+0.3V)
Maximum Current Into Any Pin...........................................50mA
Continuous Power Dissipation (TA= +70°C)
8-Pin SOT23(derate 9.70mW/°C above TA= +70°C)....777mW
Operating Temperature Ranges.........................-40°C to +85°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +3.6V, VREF= +2.5V for MAX1087/MAX1089, or VDD= +4.75V to +5.25V, VREF= +4.096V for MAX1086/MAX1088,
0.1µF capacitor at REF, fSCLK= 8MHz (50% duty cycle), AIN- = GND for MAX1088/MAX1089. TA= TMINto TMAX,unless otherwise
noted. Typical values at TA= +25°C.)
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
TIMING CHARACTERISTICS (Figures 1 and 2)(VDD= +2.7V to +3.6V, VREF= +2.5V for MAX1087/MAX1089, or VDD= +4.75V to +5.25V, VREF= +4.096V for MAX1086/MAX1088,
0.1µF capacitor at REF, fSCLK= 8MHz (50% duty cycle); AIN- = GND for MAX1088/MAX1089. TA= TMINto TMAX,unless otherwise
noted. Typical values at TA= +25°C.)
Note 2:Relative accuracy is the deviation of the analog value at any code from its theoretical value after offset and gain errors have
been removed.
Note 3:Offset nulled.
Note 4:The absolute input range for the analog inputs is from GND to VDD.
Figure 1. Detailed Serial-Interface Timing Sequence
Figure 2. Load Circuits for Enable/Disable Times
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23INTEGRAL NONLINEARITY
vs. OUTPUT CODE
MAX1086-9 toc01
OUTPUT CODE
INL (LSB)40020060080010001200
INTEGRAL NONLINEARITY
vs. OUTPUT CODEMAX1086-9 toc02
OUTPUT CODE
INL (LSB)
DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX1086-9 toc03
OUTPUT CODE
DNL (LSB)40060020080010001200
DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX1086-9 toc04
OUTPUT CODE40060020080010001200
DNL (LSB)
SUPPLY CURRENT
vs. SAMPLING RATE
MAX1086-9 toc05
SAMPLING RATE (ksps)
SUPPLY CURRENT (
SUPPLY CURRENT
vs. SAMPLING RATE
MAX1086-9 toc06
SAMPLING RATE (ksps)
SUPPLY CURRENT (
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1086-9 toc07
VDD (V)
SUPPLY CURRENT (
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX1086-9 toc08
VDD (V)
SHUTDOWN CURRENT (nA)
Typical Operating Characteristics(VDD= +3.0V, VREF= +2.5V for MAX1087/MAX1089 or VDD= +5.0V, VREF= +4.096V for MAX1086/MAX1088, 0.1µF capacitor at
REF, fSCLK= 8MHz, (50% Duty Cycle), AIN- = GND for MAX1088/1089, TA= +25°C, unless otherwise noted.)
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
Typical Operating Characteristics (continued)(VDD= 3.0V, VREF= 2.5V for MAX1087/MAX1089 or VDD= 5.0V, VREF= +4.096V for MAX1086MAX1088, 0.1µF capacitor at REF,
fSCLK= 8MHz, (50% Duty Cycle), AIN- = GND for MAX1088/89, TA= +25°C, unless otherwise noted.)
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
Detailed DescriptionThe MAX1086–MAX1089 analog-to-digital converters
(ADCs) use a successive-approximation conversion
(SAR) technique and an on-chip track-and-hold (T/H)
structure to convert an analog signal into a 10-bit digital
result.
The serial interface provides easy interfacing to micro-
processors (µPs). Figure 3 shows the simplified internal
structure for the MAX1086/MAX1087 (2–channels, sin-
gle-ended) and the MAX1088/MAX1089 (1–channel,
true-differential).
True-Differential Analog Input Track/HoldThe equivalent circuit of Figure 4 shows the
MAX1086–MAX1089’s input architecture which is com-
posed of a T/H, input multiplexer, comparator, and
switched-capacitor DAC. The T/H enters its tracking
mode on the rising edge of CNVST. The positive input
capacitor is connected to AIN1 or AIN2 (MAX1086/
MAX1087) or AIN+ (MAX1088/MAX1089). The negative
input capacitor is connected to GND (MAX1086/
MAX1087) or AIN- (MAX1088/MAX1089). The T/H
enters its hold mode on the falling edge of CNVST and
the difference between the sampled positive and nega-
tive input voltages is converted. The time required for
the T/H to acquire an input signal is determined by how
quickly its input capacitance is charged. If the input
signal’s source impedance is high, the acquisition time
lengthens, and CNVST must be held high for a longer
period of time. The acquisition time, tACQ, is the maxi-
mum time needed for the signal to be acquired, plus
the power-up time. It is calculated by the following
equation:
tACQ= 7 x (RS+ RIN) x 24pF + tPWR
Pin Description
MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23where RIN= 1.5kΩ, RSis the source impedance of the
input signal, and tPWR= 1µs is the power-up time of the
device.
Note:tACQis never less than 1.4µs and any source
impedance below 300Ωdoes not significantly affect the
ADC‘s AC performance. A high impedance source can
be accommodated either by lengthening tACQor by
placing a 1µF capacitor between the positive and neg-
ative analog inputs.
Selecting AIN1 or AIN2
(MAX1086/MAX1087)Select between the MAX1086/MAX1087’s two positive
input channels using the CNVST pin. If AIN1 is desired
(Figure 5a), drive CNVST high to power-up the ADC
and place the T/H in track mode with AIN1 connected
to the positive input capacitor. Hold CNVST high for
tACQto fully acquire the signal. Drive CNVST low to
place the T/H in hold mode. The ADC will then perform
a conversion and shutdown automatically. The MSB is
available at DOUT after 3.7µs. Data can then be
clocked out using SCLK. Be sure to clock out all 12 bits
of data (the 10-bit result plus two sub-bits) before dri-
ving CNVST high for the next conversion. If all 12 bits of
data are not clocked out before CNVST is driven high,
AIN2 will be selected for the next conversion.
If AIN2 is desired (Figure 5b), drive CNVST high for at
least 30ns. Next, drive it low for at least 30ns, and then
high again. This will power-up the ADC and place the
T/H in track mode with AIN2 connected to the positive
input capacitor. Now hold CNVST high for tACQto fully
acquire the signal. Drive CNVST low to place the T/H in
hold mode. The ADC will then perform a conversion
and shutdown automatically. The MSB is available at
DOUT after 3.7µs. Data can then be clocked out using
SCLK. If all 12 bits of data are not clocked out before
CNVST is driven high, AIN2 will be selected for the next
conversion.
Selecting Unipolar or Bipolar Conversions
(MAX1088/MAX1089)Initiate true-differential conversions with the
MAX1088/MAX1089’s unipolar and bipolar modes,
using the CNVST pin. AIN+ and AIN- are sampled at
the falling edge of CNVST. In unipolar mode, AIN+ can
exceed AIN- by up to VREF. The output format is
straight binary. In bipolar mode, either input can
exceed the other by up to VREF/2. The output format is
two’s complement.
Note:In both modes, AIN+ and AIN- must not exceed
VDDby more than 50mV or be lower than GND by more
than 50mV.
If unipolar mode is desired (Figure 5a), drive CNVST
high to power-up the ADC and place the T/H in track
mode with AIN+ and AIN- connected to the input
capacitors. Hold CNVST high for tACQto fully acquire
the signal. Drive CNVST low to place the T/H in hold
mode. The ADC will then perform a conversion and
shutdown automatically. The MSB is available at DOUT
after 3.7µs. Data can then be clocked out using SCLK.
Be sure to clock out all 12 bits (the 10-bit result plus
two sub-bits) of data before driving CNVST high for the
next conversion. If all 12 bits of data are not clocked
out before CNVST is driven high, bipolar mode will be
selected for the next conversion.
If bipolar mode is desired (Figure 5b), drive CNVST
high for at least 30ns. Next, drive it low for at least 30ns
and then high again. This will place the T/H in track
mode with AIN+ and AIN- connected to the input
capacitors. Now hold CNVST high for tACQto fully
acquire the signal. Drive CNVST low to place the T/H in
hold mode. The ADC will then perform a conversion
and shutdown automatically. The MSB is available at
DOUT after 3.7µs. Data can then be clocked out using
SCLK. If all 12 bits of data are not clocked out before
CNVST is driven high, bipolar mode will be selected for
the next conversion.
Input BandwidthThe ADCs input tracking circuitry has a 1MHz small-
signal bandwidth, so it is possible to digitize high-
speed transient events and measure periodic signals
with bandwidths exceeding the ADC’s sampling rate by
using undersampling techniques. To avoid high fre-
quency signals being aliased into the frequency band
of interest, anti-alias filtering is recommended.
