MAX1134BCAP ,16-Bit ADCs, 150ksps, 3.3V Single Supplyapplications. Software-Configurable Unipolar and Bipolar InputThe MAX1134 accepts input signals of ..
MAX1134BCAP+ ,16-Bit ADCs, 150ksps, 3.3V Single Supplyapplications. Software-Configurable Unipolar and Bipolar InputThe MAX1134 accepts input signals of ..
MAX1134BCAP+ ,16-Bit ADCs, 150ksps, 3.3V Single SupplyFeaturesThe MAX1134/MAX1135 are 150ksps, 16-bit ADCs. 150ksps (Bipolar) and 125ksps (Unipolar)Thes ..
MAX1134BEAP ,16-Bit ADCs, 150ksps, 3.3V Single SupplyApplicationsPin ConfigurationIndustrial Process ControlTOP VIEWIndustrial I/O ModulesREF 1 20 AINDa ..
MAX1134BEAP+ ,16-Bit ADCs, 150ksps, 3.3V Single SupplyELECTRICAL CHARACTERISTICS(AV = DV = 3.3V ±5%, f = 3.6MHz, external clock (50% duty cycle), 24 cloc ..
MAX1134BEAP+ ,16-Bit ADCs, 150ksps, 3.3V Single SupplyMAX1134/MAX113519-2464; Rev 0; 4/0216-Bit ADCs, 150ksps, 3.3V Single Supply
MAX3483CSA+ ,3.3V Powered, 10Mbps and Slew-Rate Limited, True RS-485/RS-422 Transceivers
MAX3483ECPA+ ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3483ECSA ,3.3V-Powered, 【15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3483ECSA ,3.3V-Powered, 【15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3483ECSA ,3.3V-Powered, 【15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3483ECSA ,3.3V-Powered, 【15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX1134BCAP-MAX1134BEAP
16-Bit ADCs, 150ksps, 3.3V Single Supply
General DescriptionThe MAX1134/MAX1135 are 150ksps, 16-bit ADCs.
These serially interfaced ADCs connect directly to SPI™,
QSPI™, and MICROWIRE™ devices without external
logic. They combine an input scaling network, internal
track/hold (T/H), clock, and three general-purpose digital
output pins (for external multiplexer or PGA control) in a
20-pin SSOP package. The excellent dynamic perfor-
mance (THD ≥90dB), high speed (150ksps in bipolar
mode), and low power (8.0mA) of these ADCs make
them ideal for applications such as industrial process
control, instrumentation, and medical applications.
The MAX1134 accepts input signals of 0 to +6V (unipo-
lar) or ±6V (bipolar), while the MAX1135 accepts input
signals of 0 to +2.048V (unipolar) or ±2.048V (bipolar).
Operating from a single 3.135V to 3.465V analog and
digital supply, power-down modes reduce current con-
sumption to 0.15mA at 10ksps and further reduce sup-
ply current to less than 20µA at slower data rates.
A serial strobe output (SSTRB) allows direct connection
to the TMS320 family digital-signal processors. The
MAX1134/MAX1135 user can select either the internal
clock or an external serial-interface clock for the ADC to
perform analog-to-digital conversions.
The MAX1134/MAX1135 feature internal calibration cir-
cuitry to correct linearity and offset errors. On-demand
calibration allows the user to optimize performance.
Three user-programmable logic outputs are provided
for the control of an 8-channel mux or PGA.
The MAX1134/MAX1135 are available in a 20-pin SSOP
package and are fully specified over the -40°C to
+85°C temperature range.
ApplicationsIndustrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Medical Instruments
Portable and Battery-Powered Equipment
Features150ksps (Bipolar) and 125ksps (Unipolar)
Sampling ADC16 Bits, No Missing Codes1LSB INL (typ) Guaranteed-100dB THD 3.3V Single-Supply OperationLow-Power Operation
4.5mA (typ) (Unipolar Mode)1.2µA Shutdown ModeSoftware-Configurable Unipolar and Bipolar Input
Ranges
0 to +6V and ±6V (MAX1134)
0 to +2.048V and ±2.048V (MAX1135)Internal or External ClockSPI/QSPI/MICROWIRE TMS320-Compatible Serial
Interface Three User-Programmable Logic Outputs Small 20-Pin SSOP Package
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
Ordering Information19-2464; Rev 0; 4/02
Ordering Information continued at end of data sheet.
Functional Diagram and Typical Application Circuit appear
at end of data sheet.SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
Pin Configuration
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(AVDD= DVDD= 3.3V ±5%, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF=
2.048V, CREF= 4.7µF, CCREF= 1µF, 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, DVDDto DGND..............................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AIN to AGND ....................................................................±16.5V
CREF, REF to AGND................................-0.3V to (AVDD+ 0.3V)
Digital Inputs to DGND.............................................-0.3V to +6V
Digital Outputs to DGND.........................-0.3V to (DVDD+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
20-Pin SSOP (derate 8.00mW/°C above +70°C).........640mW
Operating Temperature Ranges
MAX113_ _CAP...................................................0°C to +70°C
MAX113_ _EAP................................................-40°C to +85°C
Storage Temperature Range.............................-60°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= 3.3V ±5%, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF=
2.048V, CREF= 4.7µF, CCREF= 1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= 3.3V ±5%, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF=
2.048V, CREF= 4.7µF, CCREF= 1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS (Figures 5 and 6)(AVDD= DVDD= 3.3V ±5%, TA= TMINto TMAX, unless otherwise noted.)
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
TIMING CHARACTERISTICS (Figures 5 and 6) (continued)(AVDD= DVDD= 3.3V ±5%, TA= TMINto TMAX, unless otherwise noted.)
Note 1:Tested at AVDD= DVDD = 3.3V, bipolar input mode.
Note 2:Relative accuracy is the deviation of the analog value at any code from its theoretical value after the gain error and offset
error have been nullified.
Note 3:Offset nullified.
Note 4:Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle. Includes
the acquisition time.
Note 5:Acquisition time is 5 clock cycles in short acquisition mode and 13 clock cycles in long acquisition mode.
Note 6:Performance is limited by the converter’s noise floor, typically 300µVP-P.
Note 7:When an external reference has a different voltage than the specified typical value, the full scale of the ADC scales propor-
tionally.
Note 8:Defined as the change in positive full scale caused by a ±5% variation in the nominal supply voltage.
Typical Operating Characteristics(MAX1134/MAX1135, AVDD= DVDD= 3.3V, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps),
bipolar input, REF = 2.048V, 4.7µF on REF, 1µF on CREF, TA= +25°C, unless otherwise noted.)
MAX1134/MAX1135
Typical Operating Characteristics (continued)(MAX1134/MAX1135, AVDD= DVDD= 3.3V, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps),
bipolar input, REF = 2.048V, 4.7µF on REF, 1µF on CREF, TA= +25°C, unless otherwise noted.)
16-Bit ADCs, 150ksps, 3.3V Single Supply
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
MAX1134/MAX1135
Detailed DescriptionThe MAX1134/MAX1135 ADCs use a successive-
approximation technique and input track/hold (T/H) cir-
cuitry to convert an analog signal to a 16-bit digital
output. The MAX1134/MAX1135 easily interface to
microprocessors (µPs). The data bits can be read either
during the conversion in external clock mode or after the
conversion in internal clock mode.
In addition to a 16-bit ADC, the MAX1134/MAX1135
include an input scaler, an internal digital microcontroller,
calibration circuitry, and an internal clock generator.
The input scaler for the MAX1134 enables conversion
of input signals ranging from 0 to +6V (unipolar input)
or ±6V (bipolar input). The MAX1135 accepts 0 to
+2.048V (unipolar input) or ±2.048V (bipolar input). The
input range is software selectable.
CalibrationTo minimize linearity, offset, and gain errors, the
MAX1134/MAX1135 have on-demand software calibra-
tion. Initiate calibration by writing a control byte with bit
M1 = 0 and bit M0 = 1 (Table 1). Select internal or exter-
nal clock for calibration by setting the INT/EXTbit in the
control byte. Calibrate the MAX1134/MAX1135 with the
same clock mode used for performing conversions.
Offsets resulting from synchronous noise (such as the
conversion clock) are canceled by the MAX1134/
MAX1135’s calibration circuitry. However, because the
magnitude of the offset produced by a synchronous
signal depends on the signal’s shape, recalibration
may be appropriate if the shape or relative timing of the
clock, or other digital signals change, as may occur if
more than one clock signal or frequency is used.
Input ScalerThe MAX1134/MAX1135 have an input scaler, which
allows conversion of true bipolar input voltages while
operating from a single 3.3V supply. The input scaler
attenuates and shifts the input as necessary to map the
external input range to the input range of the internal
ADC. The MAX1134 analog input range is 0 to +6V
(unipolar) or ±6V (bipolar). The MAX1135 analog input
16-Bit ADCs, 150ksps, 3.3V Single Supply
Table 1. Control Byte Format
range is 0 to +2.048V (unipolar) or ±2.048V (bipolar).
Unipolar and bipolar mode selection is configured with
bit 6 of the serial control byte (Table 1).
Figure 1 shows the equivalent input circuit of the
MAX1134/MAX1135. The resistor network on the analog
input provides ±16.5V fault protection. This circuit limits
the current going into or out of the pin to less than 2mA.
The overvoltage protection is active even if the device
is in a power-down mode, or if AVDD= 0.
Digital InterfaceThe digital interface pins consist of SHDN, RST,
SSTRB, DOUT, SCLK, DIN, and CS. Bringing SHDNlow
places the MAX1134/MAX1135 in its 1.2µA shutdown
mode. A logic low on RSThalts the MAX1134/MAX1135
operation and returns the part to its power-on-reset
state.
In external clock mode, SSTRB is low and pulses high
for one clock cycle at the start of conversion. In internal
clock mode, SSTRB goes low at the start of the conver-
sion, and goes high to indicate that the conversion is
finished.
The DIN input accepts control byte data, which is
clocked in on each rising edge of SCLK. After CSgoes
low or after a conversion or calibration completes, the
first logic 1 clocked into DIN is interpreted as the
START bit, the MSB of the 8-bit control byte.
The SCLK input is the serial-data-transfer clock, which
clocks data in and out of the MAX1134/MAX1135.
SCLK also drives the ADC conversion steps in external
clock mode (see the Internal and External Clock Modes
section).
DOUT is the serial output of the conversion result.
DOUT is updated on the falling edge of SCLK. DOUT is
high impedance when CSis high.must be low for the MAX1134/MAX1135 to accept a
control byte. The serial interface is disabled when CSis
high.
User-Programmable OutputsThe MAX1134/MAX1135 have three user-program-
mable outputs: P0, P1, and P2. The power-on default
state for the programmable outputs is zero. These are
push-pull CMOS outputs suitable for driving a multi-
plexer, a PGA, or other signal preconditioning circuitry.
Bits 0, 1, and 2 of the control byte control the user-pro-
grammable outputs (Tables 1, 2).
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply Figure 2. Short Acquisition Mode (24 Clock Cycles) External Clock
Table 2. User-Programmable Outputs
