Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - AD converter (ADC) External , Internal DIP 28

MAX174/MX574A/MX674A

Industry-Standard, Complete 12-Bit ADCs

�� Maxim Integrated Products 1

Functional Diagram

19-2765; Rev 3; 8/11

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX174.related.

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

5kI

131211

BIPOFF 10V

20V

+10V

REF

REFIN

AGND

REFOUT

12-BIT

DAC

DGND

SAR

LOW

NIBBLE

444

MIDDLE

NIBBLE

HIGH

NIBBLE

CLOCK

AND

CONTROL

LOGIC

12/8

27 56282423201916

D0 D3 D4 D7 D8 D11 STS CE R/C

MAX174

MX574A

MX674A

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Summary of content (18 pages)

PAGE 1
9-2765; Rev 3; 8/11 EVALUATION KIT AVAILABLE MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs General Description Features 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 dissipation 3 times (150mW) over comparable devices.
PAGE 2
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs ABSOLUTE MAXIMUM RATINGS 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.
PAGE 3
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs ELECTRICAL CHARACTERISTICS—MAX174 (continued) (VL = +5V, VEE = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.) PARAMETER SYMBOL Full-Scale Calibration Change CONDITIONS MIN TYP MAX MAX174AC ±2 (10) MAX174BC ±5 (27) MAX174CC ±9 (50) MAX174AE ±7 (19) MAX174BE ±10 (38) MAX174CE ±20 (75) MAX174AM ±5 (12) MAX174BM ±10 (25) MAX174CM ±20 (50) UNITS LSB (ppm/°C INTERNAL REFERENCE MAX174A 9.98 10.00 10.
PAGE 4
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.
PAGE 5
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs ELECTRICAL CHARACTERISTICS—MAX174/MX574/MX674A (continued) (VL = +5V, VCC = +15V or +12V, VEE = -15V or -12V, TA = +25NC, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS Input Current IIN CS, CE, R/C, A0, 12/8, VIN = 0 to VL Input Capacitance CIN CS, CE, R/C, A0, 12/8 Output Low Voltage VOL DB11–DB0, STS ISINK = 1.
PAGE 6
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs TIMING CHARACTERISTICS—MAX174/MX574A/MX674A (Note 6) (VL = +5V, VCC = +15V or +12V, VEE = -15V or -12V.
PAGE 7
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs +5V +5V 3kI 3kI 3kI DN DN DN DN 3kI 100pF 100pF Figure 1. Load Circuit for Access Time Test LOGIC 0 TO HIGH - Z LOGIC 1 TO HIGH - Z HIGH-Z TO LOGIC 1 HIGH-Z TO LOGIC 1 100pF 100pF Figure 2.
PAGE 8
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Pin Description (continued) PIN NAME 6 CE 7 VCC 8 REFOUT 9 AGND Analog Ground 10 REFIN Reference Input 11 VEE BIPOFF 12 13 FUNCTION Chip-Enable Input. Must be high to select device. +12V or +15V Supply +10V Reference Output -12V or -15V Supply Bipolar Offset Input. Connect to REFOUT for bipolar input range.
PAGE 9
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs BIPOFF 20VIN 10VIN REFIN 5kI 2R* -50I 9.950kI R* DAC 5kI 2.5kI 1.6kI REFIN 2 SAR Figure 3.
PAGE 10
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Timing and Control Convert Start Timing—Full Control Mode R/C must be low before asserting both CE and CS. If it is high, a brief read operation occurs possibly resulting in system bus contention. To initiate a conversion, use either CE or CS. CE is recommended since it is shorter by one propagation delay than CS and is the faster input of the two. CE is used to begin the conversion in Figure 4.
PAGE 11
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Stand-Alone Operation For systems which do not use or require full bus interfacing, the MAX174/MX574A/MX674A can be operated in a stand-alone mode directly linked through dedicated input ports. When configured in the stand-alone mode, conversion is controlled by R/C. In addition, CS and A0 are wired low; CE and 12/8 are wired high. To enable the three-state buffers, set R/C low. A conversion starts when R/C is set high.
PAGE 12
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Power-Supply Bypassing The MAX174/MX574A/MX674A power supplies must be filtered, well regulated, and free from high-frequency noise, or unstable output codes will result. Unless great care is taken in filtering any switching spikes present in the output, switching power supplies is not suggested for applications requiring 12-bit resolution. Take note that a few millivolts of noise converts to several error counts in a 12-bit ADC.
PAGE 13
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Table 3. Input Ranges and Ideal Digital Output Codes ANALOG INPUT VOLTAGE (V) Note Note Note Note 7: 8: 9: 10: DIGITAL OUTPUT 0 to +10V 0 to +20V ±5V ±10V +10.0000 +20.0000 +5.0000 +10.0000 1111 1111 1111 +9.9963 +19.9927 +4.9963 +9.9927 1111 1111 1110* +5.0012 +10.0024 +0.0012 +0.0024 1000 0000 0000* +4.9988 +9.9976 -0.0012 -0.0024 0111 1111 1111* +4.9963 +9.9927 -0.0037 -0.0073 0111 1111 1110* +0.0012 +0.
PAGE 14
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs +VS +15V 4.7µF S/H CONTROL INPUTS STS 0.1µF D0 –11 HA5320* MAX174* 20VIN -VS -15V 4.7µF 0.1µF VCC 10VIN VOUT -VIN +VIN 0.1µF 4.7µF VEE REFOUT GND 4.7µF BIPOFF 50I ANALOG INPUT +15V 0.1µF -15V 50I VL REFIN AGND DGND +5V 0.1µF 4.7µF *ADDITIONAL PINS OMITTED FOR CLARITY Figure 11.
PAGE 15
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs OUTPUT CODE FS = 4069 LSBs 1111 1111 1111 OUTPUT CODE 1111 1111 1110 FS = 4069 LSBs 1111 1111 1101 1000 0000 0001 1111 1111 1111 1000 0000 0000 1111 1111 1110 FULL-SCALE TRANSITION 1111 1111 1101 0111 1111 1111 0111 1111 1110 0000 0000 0011 0000 0000 0011 0000 0000 0010 0000 0000 0010 0000 0000 0001 0000 0000 0000 0000 0000 0001 0 1 2 FS-1 FS 3 0000 0000 0000 - FS +2 2 FS 2 - - FS +1 2 -2 -1 0 FS 1 FS 2 2 2 FS 1 2 ANALOG
PAGE 16
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Ordering Information PINPACKAGE PART LINEARITY (LSB) TEMPCO (ppm/NC) 8μs Maximum Conversion Time PINPACKAGE PART LINEARITY (LSB) TEMPCO (ppm/NC) TEMP RANGE: -55NC to +125NC TEMP RANGE: 0NC to +70NC MX674ASQ 28 CERDIP* 1 50 MAX174ACPI+ 28 Plastic DIP ½ 10 MX674ATQ 28 CERDIP* ¾ 25 MAX174BCPI+ 28 Plastic DIP ½ 27 MX674AUQ 28 CERDIP* ¾ 12 MAX174CCPI+ 28 Plastic DIP 1 50 MX674ASD 28 Ceramic SB 1 50 MAX174ACWI+ 28
PAGE 17
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Chip Information PROCESS: BiCMOS Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 18
MAX174/MX574A/MX674A Industry-Standard, Complete 12-Bit ADCs Revision History REVISION NUMBER REVISION DATE 0 3/90 Initial release 1 8/11 Updated the Electrical Characteristics and Ordering Information. Added Revision History. DESCRIPTION PAGES CHANGED — 2–4 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.