MX574AJEWI+ ,Industry-Standard, Complete 12-Bit ADCs19-2765; Rev 3; 8/11EVALUATION KIT AVAILABLEMAX174/MX574A/MX674AIndustry-Standard, Complete 12-Bit ..
MX574AJMWI/PR-W ,Industry-Standard, Complete 12-Bit ADCsFeatures The MAX174/MX574A/MX674A are complete 12-bit S Complete ADC with Reference and Clockanalog ..
MX574AJN ,Industry Standard Complete 12-Bit A/D ConvertersApplications
Digital Signal Processing
High-Accuracy Process Control
High-Speed Data Acquisiti ..
MX574AJN ,Industry Standard Complete 12-Bit A/D ConvertersGeneral Description
The MAX174 and the MX574A/MX674A are complete
12-bit analog-to-digital conv ..
MX574AJN+ ,Industry-Standard, Complete 12-Bit ADCsELECTRICAL CHARACTERISTICS—MAX174(V = +5V, V = +15V or +12V, V = -15V or -12V, T = +25NC, unless ot ..
MX574AJP ,Industry Standard Complete 12-Bit A/D ConvertersGeneral Description
The MAX174 and the MX574A/MX674A are complete
12-bit analog-to-digital conv ..
NDM3000 ,3 Phase Brushless Motor DriverMay 1996 NDM30003 Phase Brushless Motor Driver
NDM3001 ,3 Phase Brushless Motor DriverElectrical Characteristics (Note 1) Q3+Q6 or Q5+Q2 or Q5+Q4 Q1+Q4 or Q1+Q6 or Q3+Q2 or J ..
NDM3001 ,3 Phase Brushless Motor DriverGeneral DescriptionBrushless Motor Driver 3 Phase NDM3001 FebruaryRθRθ (T = 25°C unle ..
NDP4050L ,N-Channel Logic Level Enhancement Mode Field Effect Transistorapplications._______________________________________________________________________________ DGSAbs ..
NDP4050L ,N-Channel Logic Level Enhancement Mode Field Effect TransistorElectrical Characteristics (T = 25°C unless otherwise noted)CSymbol Parameter Conditions Min Typ Ma ..
NDP4060 ,N-Channel Enhancement Mode Field Effect Transistorapplications. _____________________________________________________________________________________ ..
MAX174ACPI+-MAX174AEWI+-MAX174BCPI+-MAX174BEPI+-MAX174BEWI+-MAX174CCPI+-MX574AJD-MX574AJEWI+-MX574AJMWI/PR-W-MX574AJN+-MX574AJP+-MX574AKN+-MX574ALEPI+-MX574ATQ/883B-MX674AJN+-MX674AKCWI+
Industry-Standard, Complete 12-Bit ADCs
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Functional Diagram
19-2765; Rev 3; 8/11
Ordering Information appears at end of data sheet.
EVALUATION KIT AVAILABLE
General Description
The MAX174/MX574A/MX674A are complete 12-bit
analog-to-digital converters (ADCs) that combine high
speed, low-power consumption, and on-chip clock and
voltage reference. The maximum conversion times are
8µs (MAX174), 15µs (MX674A), and 25µs (MX574A).
Maxim’s BiCMOS construction reduces power dissipa-
tion 3 times (150mW) over comparable devices. The
internal buried zener reference provides low-drift and
low-noise performance. External component require-
ments are limited to only decoupling capacitors and fixed
resistors. The versatile analog input structure allows for
0 to +10V or 0 to +20V unipolar or ±5V or ±10V bipolar
input ranges with pin strapping.
The MAX174/MX574A/MX674A use standard micropro-
cessor interface architectures and can be interfaced to
8-, 12-, and 16-bit wide buses. Three-state data outputs
are controlled by CS, CE, and R/C logic inputs.
Features
S Complete ADC with Reference and Clock
S 12-Bit Resolution and Linearity
S No Missing Codes Over Temperature
S 150mW Power Dissipation
S 8µs (MAX174), 15µs (MX674A), and 25µs (MX574A)
Max Conversion Times
S Precision Low TC Reference: 10ppm/NC
S Monolithic BiCMOS Construction
S 150ns Maximum Data Access Time
Applications
Digital Signal Processing
High-Accuracy Process Control
High-Speed Data Acquisition
Electro-Mechanical Systems
5kI
9.950kI
5kI1211
VEEBIPOFF10VIN20VIN
+10V
REFREFIN
AGND
REFOUT
12-BIT
DAC
VCC
DGND
SAR
LOW
NIBBLE4
MIDDLE
NIBBLE
HIGH
NIBBLE
CLOCK
AND
CONTROL
LOGIC12/856282423201916D3D4D7D8D11STSCER/CMAX174
MX574A
MX674A
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
VCC to DGND ..............................................................0 to 16.5V
VEE to DGND ...............................................................0 to 16.5V
VL to DGND ......................................................................0 to 7V
DGND to AGND ...................................................................Q1V
Control Inputs to DGND
(CE, CS, A0, 12/8, R/C) ........................-0.3V to (VCC + 0.3V)
Digital Output Voltage to DGND
(DB11–DB0, STS) .....................................-0.3V to (VL + 0.3V)
Analog Inputs to AGND (REFIN, BIPOFF, 10VIN) ...........Q16.5V
20VIN to AGND ...................................................................Q24V
REFOUT ...................................Indefinite short to VCC or AGND
Power Dissipation (any package) to +75NC .................1000mW
Derates above +75NC ..............................................10mW/NC
Operating Temperature Ranges
MAX174_C, MX_74AJ/K/L ......................................0 to +70NC
MAX174_E, MX_74AJE/KE/LE ........................-40NC to +85NC
MAX174_M, MX_74AS/T/U ............................-55NC to +125NC
Storage Temperature Range ............................-55NC to +160NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow)
PDIP, Wide SO .............................................................+260NC
PLCC ............................................................................+245NC
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
ELECTRICAL CHARACTERISTICS—MAX174
(VL = +5V, VEE = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
ACCURACY
ResolutionRES12Bits
Integral NonlinearityINL
TA = +25°CMAX174A/B±1/2
LSB
MAX174C±1
TA = TMIN to TMAX
MAX174AC/BC±1/2
MAX174AE/BE/AM/BM±3/4
MAX174C±1
Differential NonlinearityDNL12 bits, no missing codes over temperature±1LSB
Unipolar Offset Error (Note 1)MAX174A/B±1LSBMAX174C±2
Bipolar Offset Error (Notes 2, 3)MAX174A±3LSBMAX174B/C±4
Full-Scale Calibration Error (Note 3)±0.25%
TEMPERATURE COEFFICIENTS (Using Internal Reference) (Notes 2, 3, 4)
Unipolar Offset ChangeMAX174A/B±1LSBMAX174C±2
Bipolar Offset Change
MAX174AC/BC±1
LSB
MAX174CC±2
MAX174AE/AM±1
MAX174BE/BM±2
MAX174CE/CM±4
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
ELECTRICAL CHARACTERISTICS—MX574A, MX674A
(VL = + 5V, VEE = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—MAX174 (continued)
(VL = +5V, VEE = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
ACCURACY
ResolutionRES12Bits
Integral NonlinearityINL
TA = +25°C
MX574AK/L/T/U,
MX674AK/L/T/U±1/2
LSB
MX574AJ/S, MX674AJ/S±1
TA = TMIN to TMAX
MX574AK/L/KE/LE±1/2
MX674AK/L/KE/LE±1/2
MX574AT/U, MX674AT/U±3/4
MX574AJ/S, MX674AJ/S±1
Differential NonlinearityDNL12 bits, no missing codes over temperature±1LSB
Unipolar Offset Error (Note 1)MX574AK/L/T/U, MX674AK/L/T/U±1LSBMX574AJ/S, MX674AJ/S±2
Bipolar Offset Error (Notes 2, 3)MX574AL/U, MX674AL/U±3LSBMX574AJ/K/S/T, MX674AJ/K/S/T±4
Full-Scale Calibration Error
(Note 3)
MX574AL/U±0.125%MX574AJ/K/S/T, MX674A±0.25
TEMPERATURE COEFFICIENTS (Using Internal Reference) (Notes 2, 3, 4)
Unipolar Offset ChangeMX574AK/L/T/U, MX674AK/L/T/U±1LSBMX574AJ/S, MX674AJ/S±2
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Full-Scale Calibration Change
MAX174AC±2 (10)
LSB
(ppm/°C
MAX174BC±5 (27)
MAX174CC±9 (50)
MAX174AE±7 (19)
MAX174BE±10 (38)
MAX174CE±20 (75)
MAX174AM±5 (12)
MAX174BM±10 (25)
MAX174CM±20 (50)
INTERNAL REFERENCE
Output VoltageNo loadMAX174A9.9810.0010.02VMAX174B/C9.9710.0010.03
Output Current (Note 5)Available for external loads, in addition to
REFIN and BIPOFF load2mA
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
ELECTRICAL CHARACTERISTICS—MX574A, MX674A (continued)
(VL = + 5V, VEE = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—MAX174/MX574/MX674A
(VL = +5V, VCC = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Bipolar Offset Change
MX574AK/L, MX674AK/L±1
LSB
MX574AJ, MX674AJ±2
MX574AU/LE, MX674AU/LE±1
MX574AT/KE, MX674AT/KE±2
MX574AS/JE, MX674AS/JE±4
Full-Scale Calibration Change
MX574AL, MX674AL±2 (10)
LSB
(ppm/°C
MX574AK, MX674AK±5 (27)
MX574AJ, MX674AJ±9 (50)
MX574ALE, MX674ALE±7 (19)
MX574AKE, MX674AKE±10 (38)
MX574AJE, MX674AJE±20 (75)
MX574AU, MX674AU±5 (12)
MX574AT, MX674AT±10 (25)
MX574AS, MX674AS±20 (50)
INTERNAL REFERENCE
Output VoltageNo load
MX574AL/U9.9910.0010.01MX574AJ/K/S/T, MX674AL/U9.9810.0010.02
MX674AJ/K/S/T9.9710.0010.03
Output Current (Note 5)Available for external loads, in addition to
REFIN and BIPOFF load2mA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
ANALOG INPUT
Bipolar Input RangeUsing 10V input±5VUsing 20V input±10
Unipolar Input RangeUsing 10V input0+10VUsing 20V input0+20
Input Impedance10V input357kW20V input61014
POWER-SUPPLY REJECTION (Max Change in Full-Scale Calibration)
VCC Only15V ±1.5V or
12V ±0.6V
MAX174A/B, MX_74AK/L/TU±1/8±1LSBMAX174C, MX_74AJ/S±1/8±2
VEE Only15V ±1.5V or 12V ±0.6V±1/8±1/2LSB
VL Only 5V ±0.5V±1/8±1/2LSB
LOGIC INPUTS
Input Low VoltageVILCS, CE, R/C, A0, 12/80.8V
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Note 1: Adjustable to zero.
Note 2: With 50ω fixed resistor from REFOUT to BIPOFF. Adjustable to zero.
Note 3: With 50ω fixed resistor from REFOUT to REFIN. Adjustable to zero.
Note 4: Maximum change in specification from TA = +25°C to TMIN or TA = +25°C to TMAX.
Note 5: External load current should not change during a conversion. For Q12V supply operation, REFOUT need not be buffered
except when external load in addition to REFIN and BIPOFF inputs have to be driven.
ELECTRICAL CHARACTERISTICS—MAX174/MX574/MX674A (continued)
(VL = +5V, VCC = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input CurrentIINCS, CE, R/C, A0, 12/8, VIN = 0 to VL±5µA
Input CapacitanceCINCS, CE, R/C, A0, 12/87pF
LOGIC OUTPUTS
Output Low VoltageVOLDB11–DB0, STSISINK = 1.6mA0.4V
Output High VoltageVOHDB11–DB0, STSISOURCE = 500µA4V
Floating State Leakage CurrentILKGDB11–DB0, STSVOUT = 0 to VL±10µA
Floating State Output CapacitanceCOUTDB11–DB08pF
CONVERSION TIME
12-Bit CycletCONV
MX574A152025MX674A91215
MAX174678
8-Bit CycletCONV
MX574A101418MX674A6811
MAX174456
POWER REQUIREMENTS
VCC Operating Range11.416.5V
VL Operating Range4.55.5V
VEE Operating Range-11.4-16.5V
VCC Supply Current (Note 5)ICC35mA
VL Supply Current (Note 5)IL38mA
VEE Supply Current (Note 5)IEE610mA
Power Dissipation (Note 5)PDVCC = +15V and VEE = -15V150265mW
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Note 6: Timing specifications guaranteed by design. All input control signals specified with tR = tF = 5ns (10% to 90% of +5V) and
timed from a voltage level of +1.6V. See loading circuits in Figures 1 and 2.
TIMING CHARACTERISTICS—MAX174/MX574A/MX674A
(VL = +5V, VCC = +15V or +12V, VEE = -15V or -12V.)
(Note 6)
PARAMETERSYMBOLCONDITIONSTA = +25°CTA = -40°C TO +85°C
TA = 0°C TO +70° CTA = -55°C TO +125°CUNITS
MINTYPMAXMINTYPMAXMINTYPMAX
CONVERT START TIMING—FULL CONTROL MODE
STS Delay from CEtDSCCL = 50pF100200250320ns
CE Pulse WidthtHEC50155050ns
CS to CE Setup tSSC505050ns
CS Low During CE HightHSC505050ns
R/C to CE SetuptSRC505050ns
R/C Low During CE HightHRC505050ns
A0 to CE SetuptSAC000ns
A0 Valid During CE HightHAC505050ns
READ TIMING—FULL CONTROL MODE
Access Time (From CE)tDDCL = 100pF60120150200ns
Data Valid After CE LowtHD25402015ns
Output Float DelaytHL75100120ns
CS to CE SetuptSSR505050ns
R/C to CE SetuptSRR000ns
A0 to CE SetuptSAR505050ns
CS Valid After CE LowtHSR000ns
R/C High After CE LowtHRR000ns
A0 Valid After CE LowtHAR000ns
STAND-ALONE MODE
Low R/C Pulse WidthtHRL50155050ns
STS Delay from R/CtDS115200250320ns
Data Valid After R/C LowtHDR25402015ns
STS Delay After Data ValidtHS
MX574A300600100030010003001000MX674A303206003060030600
MAX174301403003030030400
High R/C Pulse WidthtHRH150150200ns
Data Access TimetDDRCL = 100pF60120150200ns
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Figure 2. Load Circuit for Output Float Delay TestFigure 1. Load Circuit for Access Time Test
Pin Configurations
Pin Description
PINNAMEFUNCTIONVLLogic Supply, +5V12/8Data Mode Select InputCSChip-Select Input. Must be low to select device.A0Byte Address/Short-Cycle Input. When starting a conversion, controls number of bits converted (low = 12
bits, high = 8 bits). When reading data, if 12/8 = low, enables low byte (A0 = high) or high byte (A0 = low).Read/Convert Input. When high, the device will be in the data-read mode. When low, the device will
3kI
100pF
HIGH-Z TO LOGIC 1
3kI
+5V
100pF
HIGH-Z TO LOGIC 1
3kI
100pF
LOGIC 1 TO HIGH - Z
3kI
+5V
100pF
LOGIC 0 TO HIGH - ZSTS
D11
D10
TOP VIEW
VCC
REFOUT
AGND
REFIN
VEE
BIPOFF
DGND
10VIN
20VIN
MAX174
MX574A
MX674A
DIP/SO12/8
R/C
BIPOFF
10V
20V
DGNDD1D2CS12/
STSD11D10VEEREFINAGNDREFOUTVCCCER/C14151617182342627285
MAX174
MX574A
MX674A
PLCC
TOP VIEW
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Pin Description (continued)
Detailed Description
Converter Operation
The MAX174/MX574A/MX674A use a successive approx-
imation technique to convert an unknown analog input to
a 12-bit digital output code. The control logic provides
easy interface to most microprocessors. Most applica-
tions require only a few external passive components to
perform the analog-to-digital (A/D) function.
The internal voltage output DAC is controlled by a suc-
cessive approximation register (SAR) and has an output
impedance of 2.5kω. The analog input is connected to
the DAC output with a 5kω resistor for the 10V input and
10kω resistor for the 20V input. The comparator is essen-
tially a zero-crossing detector, and its output is fed back
to the SAR input.
The SAR is set to half-scale as soon as a conversion starts.
The analog input is compared to 1/2 of the full-scale volt-
age. The bit is kept if the analog input is greater than half-
scale or dropped if smaller. The next bit, bit 10, is then set
with the DAC output either at 1/4 scale, if the most signifi-
cant bit (MSB) is dropped, or 3/4 scale if the MSB is kept.
The conversion continues in this manner until the least
significant bit (LSB) is tried. At the end of the conversion,
the SAR output is latched into the output buffers.
Digital Interface
CE, CS, and R/C control the operation of the MAX174/
MX574A/MX674A. While both CE and CS are asserted,
the state of R/C selects whether a conversion (R/C = 0) or
a data read (R/C = 1) is in progress. The register control
inputs, 12/8 and A0, select the data format and conver-
sion length. A0 is usually tied to the LSB of the address
bus. To perform a full 12-bit conversion, set A0 low during
a convert start. For a shorter 8-bit conversion, A0 must be
high during a convert start.
Output Data Format
During a data read, A0 also selects whether the three-
state buffers contain the 8 MSBs (A0 = 0) or the 4 LSBs
(A0 = 1) of the digital result. The 4 LSBs are followed by
4 trailing 0s.
Output data is formatted according to the 12/8 pin. If
this input is low, the output will be a word broken into
two 8-bit bytes. This allows direct interlace to 8-bit buses
without the need for external three-state buffers. If 12/8 is
high, the output will be one 12-bit word. A0 can change
state while a data-read operation is in effect.
To begin a conversion, the microprocessor must write
to the ADC address. Then, since a conversion usually
takes longer than a single clock cycle, the microproces-
sor must wait for the ADC to complete the conversion.
Valid data will be made available only at the end of the
conversion, which is indicated by STS. STS can be ether
polled or used to generate an interrupt upon completion.
Or, the microprocessor can be kept idle by inserting the
appropriate number of No Operation (NOP) instructions
between the conversion-start and data-read commands.
PINNAMEFUNCTIONCEChip-Enable Input. Must be high to select device.VCC+12V or +15V SupplyREFOUT+10V Reference OutputAGNDAnalog GroundREFINReference InputVEE-12V or -15V SupplyBIPOFFBipolar Offset Input. Connect to REFOUT for bipolar input range.10VIN10V Span Input20VIN20V Span InputDGNDDigital Ground
16–27D0–D11Three-State Data OutputsSTSStatus Output
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Table 1. Truth Table
After the conversion is completed, data can be obtained
by the microprocessor. The ADCs have the required
logic for 8-, 12-, and 16-bit bus interfacing, which is
determined by the 12/8 input. If 12/8 is high, the ADCs
are configured for a 16-bit bus. Data lines D0–D11 may
be connected to the bus as either the 12 MSBs or the 12
LSBs. The other 4 bits must be masked out in software.
For 8-bit bus operation, 12/8 is set low. The format is left
justified, and the even address, A0 low, contains the 8
MSBs. The odd address, A0 high, contains the 4 LSBs,
which is followed by 4 trailing 0s. There is no need to
use a software mask when the ADCs are connected to
an 8-bit bus.
Note that the output cannot be forced to a right-justified for-
Figure 3. Analog Equivalent Circuit
Table 2. MAX174/MX574A/MX674A Data
Format for 8-Bit BusCECSR/C12/8A0OPERATIONXXXXNone1XXXNone00X0Initiate 12-bit conversion00X1Initiate 12-bit conversion011XEnable 12-bit conversion0100Enable 8 MSBs0101Enable 4 LSBs + 4
trailing 0sD6D5D4D3D2D1D0
High Byte
(A0 = 0)MSBD10D9D8D7D6D5D4
Low Byte
(A0 = 1)D3D2D1D00000
2R* -50I
5kI
9.950kI
5kI
1.6kI
BIPOFF10VIN20VIN
REFIN
SAR
2.5kI
DAC
REFIN
27 (MSB)
26 (D10)
25 (D9)
24 (D8)
23 (D7)
22 (D6)
21 (D5)
20 (D4)
19 (D3)
18 (D2)
17 (D1)
16 (LSB)
HARDWIRING FOR 8-BIT DATA BUSES
DATA BUS
MAX174
MX574A
MX674A
