MAX195AEWE Maxim Integrated, MAX195AEWE Datasheet
MAX195AEWE
Specifications of MAX195AEWE
Related parts for MAX195AEWE
MAX195AEWE Summary of contents
Page 1
... DGND 6 EOC DIP/Wide SO/Ceramic SB ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. ____________________________Features 16 Bits, No Missing Codes 90dB SINAD 9.4µs Conversion Time 10µA (max) Shutdown Mode ...
Page 2
ADC with 10µA Shutdown ABSOLUTE MAXIMUM RATINGS VDDD to DGND .....................................................................+7V VDDA to AGND......................................................................+7V VSSD to DGND.........................................................+0.3V to -6V VSSA to AGND .........................................................+0.3V to -6V VDDD to VDDA, VSSD to VSSA ..........................................±0.3V AIN, REF ....................................(VSSA - 0.3V) to ...
Page 3
ADC with 10µA Shutdown ELECTRICAL CHARACTERISTICS (continued) (VDDD = VDDA = +5V, VSSD = VSSA = -5V, f values are +25°C.) A PARAMETER SYMBOL DIGITAL INPUTS (CLK, CS, CONV, RESET, SCLK, BP/UP/SHDN) CLK, CS, CONV, ...
Page 4
ADC with 10µA Shutdown ELECTRICAL CHARACTERISTICS (continued) (VDDD = VDDA = +5V, VSSD = VSSA = -5V, f values are +25°C.) A PARAMETER SYMBOL POWER REQUIREMENTS (cont.) Power Dissipation VDDD Shutdown Supply Current I DDD ...
Page 5
ADC with 10µA Shutdown ______________________________________________________________Pin Description PIN NAME Bipolar/Unipolar/Shutdown Input. Three-state input selects bipolar or unipolar input range, or shutdown. 1 BP/UP/SHDN 0V = shutdown, +5V = unipolar, floating = bipolar. 2 CLK Conversion Clock Input 3 SCLK ...
Page 6
ADC with 10µA Shutdown MSB 32,768C 16,384C AIN REF AGND Figure 1. Capacitor DAC Functional Diagram CLK t RCH RESET EOC MAX195 OPERATION HALTS Figure 2. Initiating Calibration In an ideal DAC, each of the capacitors associated with ...
Page 7
ADC with 10µA Shutdown CLK EOC CONV TRACK/HOLD CONVERSION Figure 3. Initiating Conversions—At least 3 CLK cycles since end of previous conversion. If the power supplies do not settle within the MAX195’s power-on delay (500ns minimum), power-up calibration ...
Page 8
ADC with 10µA Shutdown t CC1 CLK EOC CONV TRACK/HOLD CONVERSION Figure 4. Initiating Conversions—Less than 3 CLK cycles since end of previous conversion. after the end of the previous conversion and EOC will go high on the ...
Page 9
ADC with 10µA Shutdown START START CLK CONV CONV to Synchronize with CLK Figure 5. Gating CS CONV t CW CLK (CASE 1) CLK (CASE 2) EOC t DV B15 FROM PREVIOUS DOUT CONVERSION CONVERSION BEGINS CASE 1: ...
Page 10
ADC with 10µA Shutdown t CONV EOC t CSS CS SCLK (CASE 1) SCLK (CASE 2) SCLK (CASE 3) DOUT B15 MSB t DV CASE 1: SCLK IDLES LOW, DATA LATCHED ON RISING EDGE (CPOL = 0, CPHA ...
Page 11
ADC with 10µA Shutdown Table 1. Low-ESR Capacitor Suppliers COMPANY CAPACITOR 595D series, Sprague 592D series AVX TPS series OS-CON series, Sanyo MVGX series Nichicon PL series BRIDGE Figure 9. Ratiometric Measurement Without an Accurate Reference __________Applications Information ...
Page 12
ADC with 10µA Shutdown +15V 0 COMP 1000pF MAX874 4.096V 6 V OUT 0.1 F GND 4 Figure 10. Typical Reference Circuit for AC Accuracy 2 ...
Page 13
ADC with 10µA Shutdown +15V INPUT SIGNAL -15V Figure 12. Analog Input Protection for Overvoltage or Improper Supply Sequence REF and AIN Input Protection The REF and AIN signals should not exceed the MAX195 supply rails. If this ...
Page 14
ADC with 10µA Shutdown A0 IN1 IN2 4-TO-1 MUX IN3 IN4 CLK EOC A0 A1 Figure 13. Change multiplexer input near beginning of conversion to allow time for slewing and settling. +15V 2 7 MAX400 ...
Page 15
ADC with 10µA Shutdown Digital noise can easily be coupled to AIN and REF. The conversion clock (CLK) and other digital signals that are active during input acquisition contribute noise to the con- version result. If the noise ...
Page 16
ADC with 10µA Shutdown If ±15V supplies are unavailable, Figure 16’s circuit works very well with the ±5V analog supplies used by the MAX195. The MAX410 has a minimum ±3.5V com- mon-mode input range, with a similar output ...
Page 17
ADC with 10µA Shutdown CS, CONV CLK EOC B15 FROM PREVIOUS DOUT CONVERSION t DV DATA LATCHED: Figure 18. Timing Diagram for Circuit of Figure 17 (Mode 1) QSPI PCS0 SCK MISO OC3 GPT IC1 OC2 IC3 74HC32 ...
Page 18
ADC with 10µA Shutdown 588ns CLK START EOC CS SCLK DOUT 1 INTERRUPT LATENCY OF THE PROCESSOR Figure 20. Timing Diagram for Circuit of Figure 19 (Mode gate is used to synchronize the ...
Page 19
ADC with 10µA Shutdown Figure 21. MAX195 Code Listing for 68HC16 Module and Circuit of Figure 19 ______________________________________________________________________________________ 19 ...
Page 20
ADC with 10µA Shutdown Figure 21. MAX195 Code Listing for 68HC16 Module and Circuit of Figure 19 (continued) 20 ______________________________________________________________________________________ ...
Page 21
ADC with 10µA Shutdown Figure 21. MAX195 Code Listing for 68HC16 Module and Circuit of Figure 19 (continued) Be sure that digital return currents do not pass through the analog ground and that return-current paths are low impedance. ...
Page 22
ADC with 10µA Shutdown 0 0 Figure 22. Supply Bypassing and Grounding the MAX195 finishes the old conversion, allows four ...
Page 23
ADC with 10µA Shutdown CLOCK SHUTDOWN + CLK CLK) Q (CLK) J (CLOCK SHUTDOWN) Figure 24. Circuit to Stop Free-Running Asynchronous CLK -10 -30 -50 -70 -90 -110 -130 -150 ...
Page 24
ADC with 10µA Shutdown 85kHz +25° 0 FREQUENCY (kHz) Figure 26. Effective Bits vs. Input Frequency 18 IDEAL V REF ...
Page 25
ADC with 10µA Shutdown 111 110 101 100 011 010 ...
Page 26
ADC with 10µA Shutdown ________________________________________________________Package Information 26 ______________________________________________________________________________________ ...
Page 27
ADC with 10µA Shutdown ___________________________________________Package Information (continued) ______________________________________________________________________________________ 27 ...
Page 28
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 28 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products Printed USA ...