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Part: MX7575BQ
Category:
Data Conversion
-> ADC (Analog to Digital Converters)
Description: MX7575, MX7576 CMOS, µP Compatible, 5µs/10µs, 8-Bit ADCs
Company: Maxim Integrated Products
Datasheet: Download MX7575BQ datasheet File size : 474 kB
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Datasheet text preview:
19-0876; Rev 1; 5/96
CMOS, µP-Compatible, 5µs/10µs, 8-Bit ADCs
_______________General Description
Maxim's MX7575/MX7576 are high-speed (5µs/10µs), microprocessor (µP) compatible, 8-bit analog-to-digital converters (ADCs). The MX7575 provides an on-chip track/hold function that allows full-scale signals up to 50kHz (386mV/µs slew rate) to be acquired and digitized accurately. Both ADCs use a successive-approximation technique to achieve their fast conversions and low power dissipation. The MX7575/MX7576 operate with a +5V supply and a 1.23V external reference. They accept input voltages ranging from 0V to 2VREF. The MX7575/MX7576 are easily interfaced to all popular 8-bit µPs through standard CS and RD control signals. These signals control conversion start and data access. A BUSY signal indicates the beginning and e n d of a conversion. Since all the data outputs are latched and three-state buffered, the MX7575/MX7576 can be directly tied to a µP data bus or system l/O port. Maxim also makes the MAX165, a plug-in replacement for the MX7575 with an internal 1.23V reference. For applications that require a differential analog input and an internal reference, the MAX166 is recommended.
____________________________Features
o Fast Conversion Time: 5µs (MX7575) 10µs (MX7576)
MX7575/MX7576
o Built-In Track/Hold Function (MX7575) o Low Total Unadjusted Error (±1LSB max) o 50kHz Full-Power Signal Bandwidth (MX7575) o Single +5V Supply Operation o 8-Bit µP Interface o 100ns Data-Access Time o Low Power: 15mW o Small-Footprint Packages
______________Ordering Information
PART MX7575JN TEMP. RANGE 0°C to +70°C PIN-PACKAGE 18 Plastic DIP INL (LSB) ±1 ±1/2 ±1 ±1/2 ±1 ±1/2 ±1 ±1 ±1/2
________________________Applications
Digital Signal Processing High-Speed Data Acquisition Telecommunications Audio Systems High-Speed Servo Loops Low-Power Data Loggers
MX7575KN 0°C to +70°C 18 Plastic DIP MX7575JCWN 0°C to +70°C 18 Wide SO MX7575KCWN 0°C to +70°C 18 Wide SO MX7575JP 0°C to +70°C 20 PLCC MX7575KP 0°C to +70°C 20 PLCC MX7575J/D 0°C to +70°C Dice* MX7575AQ -25°C to +85°C 18 CERDIP** MX7575BQ -25°C to +85°C 18 CERDIP** Ordering Information continued at end of data sheet. * Contact factory for dice specifications. ** Contact factory for availability.
_________________Pin Configurations
OP VIEW
R CS 1 T D2 P (MODE) 3 BUSY 4 C D LK 5 7 (MSB) 6 D6 7 D T 5 8 R 18 VDD 17 AEF
_______________Functional Diagrams
VDD 18 16
MX7575
AIN
MX7575 X7576
TH ACK/ R OLD
COMP
16 AIN 15 DGND 14 0 (LSB)
AGND 15 REF 17 CLK 5 O CLOCK SCILLATOR DAC
13 D1 12 D2 11 D3 10 4
SAR 6 LATCH AND O THREE-STATE UTPUT DRIVERS 14 9 DGND D7 D0
GND 9
CS RD TP
1 2 3
CONTROL L OGIC
.
( ) ARE FOR MX7576 ONLY.
DIP/SO
Pin Configurations continued at end of data sheet.
4 BUSY Functional Diagrams continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
CMOS, µP-Compatible, 5µs/10µs, 8-Bit ADCs MX7575/MX7576
ABSOLUTE MAXIMUM RATINGS
VDD to AGND......-0.3V, +7V VDD to DGND .....-0.3V, +7V AGND to DGND .....-0.3V, VDD + 0.3V Digital Input Voltage to DGND (CS, RD, TP, MODE) .....-0.3V, VDD + 0.3V Digital Output Voltage to DGND (BUSY, D0D7) ....-0.3V, VDD + 0.3V CLK Input Voltage to DGND ....-0.3V, VDD + 0.3V REF to AGND .........-0.3V, VDD + 0.3V AIN to AGND....-0.3V, VDD + 0.3V Continuous Power Dissipation (TA = +70°C) Plastic DIP (derate 11.11mW/°C above +70°C) ......889mW Wide SO (derate 9.52mW/°C above +70°C).........762mW CERDIP (derate 10.53mW/°C above +70°C) ........842mW PLCC (derate 10.00mW/°C above +70°C) ...........800mW Operating Temperature Ranges MX757_J/K ...0°C to +70°C MX757_A/B ........-25°C to +85°C MX757_JE/KE ....-40°C to +85°C MX757_S/T .......-55°C to +125°C Storage Temperature Range .....-65°C to +160°C Lead Temperature (soldering,10sec) ......+300°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.
ELECTRICAL CHARACTERISTICS
( V D D = +5V; V R E F = 1.23V; AGND = DGND = 0V; f C L K = 4MHz external for MX7575; f C L K = 2MHz external for MX7576; TA = TMIN to TMAX, unless otherwise noted.) PARAMETER ACCURACY Resolution Total Unadjusted Error Relative Accuracy No-Missing-Codes Resolution Full-Scale Error Full-Scale Tempco Offset Error (Note 1) Offset Tempco ANALOG INPUT Voltage Range DC Input Impedance Slew Rate, Tracking Signal-to-Noise Ratio (Note 2) REFERENCE INPUT Reference Voltage Reference Current LOGIC INPUTS CS, RD, MODE Input Low Voltage Input High Voltage Input Current Input Capacitance (Note 2) VREF IREF VINL VINH IIN CIN VIN = 0V or VDD TA = +25°C TA = TMIN to TMAX 2.4 ±1 ±10 10 ±5% variation for specified performance 1.23 500 0.8 V µA V V µA pF SNR MX7575 MX7575, VIN = 2.46Vp-p at 10kHz, Figure 13 45 1LSB = 2VREF/256 0 10 0.386 2VREF V M V/µs dB ±5 ±5 ±1/2 TUE INL MX757_K/B/T MX757_J/A/S MX757_K/B/T MX757_J/A/S 8 ±1 8 ±1 ±2 ±1/2 ±1 Bits LSB LSB Bits LSB ppm/°C LSB ppm/°C SYMBOL CONDITIONS MIN TYP MAX UNITS
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CMOS, µP-Compatible, 5µs/10µs, 8-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
( V D D = +5V; V R E F = 1.23V; AGND = DGND = 0V; f C L K = 4MHz external for MX7575; f C L K = 2MHz external for MX7576; TA = TMIN to TMAX, unless otherwise noted.) PARAMETER CLOCK Input Low Voltage Input High Voltage Input Low Current Input High Current LOGIC OUTPUTS (D0D7, BUSY) Output Low Voltage Output High Voltage Floating State Leakage Current Floating State Output Capacitance (Note 2) CONVERSION TIME (Note 3) Conversion Time with External Clock Conversion Time with Internal Clock POWER REQUIREMENTS (Note 4) Supply Voltage VDD Supply Current Power Dissipation Power-Supply Rejection Note 1: Note 2: Note 3: Note 4: IDD MX7575: fCLK = 4MHz MX7576: fCLK = 2MHz Using recommended clock components: RCLK = 100k, CCLK = 100pF; TA = +25°C MX7575 MX7576 5 10 5 10 15 µs 30 µs VOL VOH ISINK = 1.6mA ISOURCE = 40µA VOUT = 0V to VDD, D0D7 D0D7 TA = +25°C TA = TMIN to TMAX 4.0 ±1 ±10 10 0.4 V V µA pF VINL VINH IINL IINH VIN = 0V VIN = VDD MX757_J/A/K/B MX757_S/T MX757_J/A/K/B MX757_S/T 2.4 700 800 700 800 0.8 V V µA µA SYMBOL CONDITIONS MIN TYP MAX UNITS
MX7575/MX7576
±5% for specified performance MX757_J/A/K/B MX757_S/T 4.75V < VDD < 5.25V
5 3 15
V 6 7 ±1/4 mA mW LSB
Offset Error is measured with respect to an ideal first-code transition that occurs at 1/2LSB. Sample tested at +25°C to ensure compliance. Accuracy may degrade at conversion times other than those specified. Power-supply current is measured when MX7575/MX7576 are inactive, i.e.: For MX7575 CS = RD = BUSY = high; For MX7576 CS = RD = BUSY = MODE = high.
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