AD637JQ Analog Devices Inc, AD637JQ Datasheet
![IC RMS/DC CONV PRECISION 14-CDIP](/photos/6/56/65618/505-14-cdip_sml.jpg)
AD637JQ
Specifications of AD637JQ
Available stocks
Related parts for AD637JQ
AD637JQ Summary of contents
Page 1
FEATURES High accuracy 0.02% max nonlinearity rms input 0.10% additional error to crest factor of 3 Wide bandwidth 8 MHz rms input 600 kHz at 100 mV rms Computes True rms Square ...
Page 2
SPECIFICATIONS At 25°C, and ± unless otherwise noted. Table 1. AD637J/ AD637A Parameter Min Typ TRANSFER FUNCTION CONVERSION ACCURACY Total Error, 2 Internal Trim (Figure MIN MAX vs. Supply +300 ...
Page 3
AD637 AD637J/ AD637A Parameter Min Typ 5 FREQUENCY RESPONSE Bandwidth for 1% Additional Error (0.09 dB 200 200 IN ±3 dB Bandwidth ...
Page 4
AD637J/ AD637A Parameter Min Typ CHIP SELECT (CS) RMS ON Level Open or 2.4 V < V RMS OFF Level V < Chip Select OUT CS Low CS High On Time Constant 10 + ((25 ...
Page 5
AD637 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter ESD Rating Supply Voltage Internal Quiescent Power Dissipation Output Short-Circuit Duration Storage Temperature Range Lead Temperature Range (Soldering 10 secs) Rated Operating Temperature Range AD637J, AD637K AD637A, AD637B AD637S, 5962-8963701CA ESD CAUTION ESD ...
Page 6
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS 1 BUFF COMMON 3 AD637 OUTPUT OFFSET 4 TOP VIEW (Not to Scale DEN INPUT 6 dB OUTPUT CONNECT Figure 2. 14-Lead SBDIP/CERDIP Pin Configuration Table ...
Page 7
AD637 FUNCTIONAL DESCRIPTION 14 BUFF OUT 1 BUFF IN A5 24k Ω ABSOLUTE VALUE VOLTAGE – CURRENT CONVERTER 6k Ω 12k Ω The AD637 embodies an implicit solution of the rms equation that overcomes the inherent ...
Page 8
STANDARD CONNECTION The AD637 is simple to connect for a majority of rms measurements. In the standard rms connection shown in Figure 5, only a single external capacitor is required to set the averaging time constant. In this configuration, the ...
Page 9
AD637 Table 5. Practical Values of C and C2 for Various Input Waveforms AV Absolute Value Input Waveform Circuit Waveform and Period and Period T 1/ Symmetrical Sine Wave Sine Wave with dc Offset ...
Page 10
T η = DUTY CYCLE = η (RMS RMS IN µ 100 0.1 0. PULSE WIDTH ( µ s) Figure 16. AD637 Error vs. ...
Page 11
AD637 SIGNAL INPUT BUF COM 3 BIAS OUT SECTION 4 OFF 4.7kΩ DEN 25k Ω 10k Ω 500k Ω +2.5 VOLTS 0dB ADJUST NOTE: VALUES CHOSEN ...
Page 12
CALIBRATION Refer to Figure 19: • Set VIN = 1. 1.00 V rms • Adjust R1 for 0 dB out = 0.00 V • Set VIN = 0 0.10 V rms • Adjust ...
Page 13
AD637 BUF COM OUT OFF 4.7kΩ 6 DEN BUF COM 3 OUT OFF 4.7kΩ DEN ...
Page 14
OUTLINE DIMENSIONS 0.200 (5.08) 0.200 (5.08) 0.125 (3.18) CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. 0.200 (5.08) 0.200 (5.08) 0.125 (3.18) CONTROLLING DIMENSIONS ...
Page 15
... AD637AQ −40°C to +85°C AD637AR −40°C to +85°C AD637BQ −40°C to +85°C AD637BR −40°C to +85°C AD637JD 0°C to 70°C AD637JQ 0°C to 70°C AD637JR 0°C to 70°C AD637JR-REEL 0°C to 70°C AD637JR-REEL7 0°C to 70°C 2 AD637JRZ 0° ...