Details

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BUY AD694JNZ https://www.utsource.net/itm/p/1329551.html
4.20 mA Transmitter

Below is the parameter table and instructions for the AD694JNZ, which is a logarithmic amplifier from Analog Devices.

AD694JNZ Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	Vcc	4.5	5	5.5	V
Supply Current	Icc		12		mA	Vcc = 5V
Input Voltage Range	Vin	-0.5	0	1.5	V
Output Voltage Range	Vout	0.02	0.2	4.98	V	Vcc = 5V
Logarithmic Slope	m	33	34.6	37	mV/dB	Vcc = 5V
Intercept	b	0.2	0.3	0.4	V	Vcc = 5V
Input Impedance	Rin		100		kΩ
Output Impedance	Rout		100		Ω
Temperature Range	Toper	-40		85	°C
Storage Temperature Range	Tstg	-65		150	°C
Power Dissipation	Pd		60		mW	Vcc = 5V

Instructions for Using AD694JNZ

1. Supply Voltage:

   • Connect the positive supply voltage (Vcc) to pin 8 and ground (GND) to pin 4.
   • Ensure the supply voltage is within the range of 4.5V to 5.5V.

2. Input Signal:

   • Apply the input signal to the IN+ (pin 5) and IN- (pin 6) pins.
   • The input voltage should be within the range of -0.5V to 1.5V.

3. Output Signal:

   • The output voltage (Vout) can be measured at pin 7.
   • The output voltage will vary from 0.02V to 4.98V depending on the input signal.

4. Logarithmic Conversion:

   • The AD694JNZ converts the input signal to a logarithmic output using the formula: [ V_{text} = m cdot log_{10}(V_{text}) + b ]
   • Where ( m ) is the logarithmic slope (typically 34.6 mV/dB) and ( b ) is the intercept (typically 0.3V).

5. Temperature Considerations:

   • The device operates over a temperature range of -40°C to 85°C.
   • Store the device in a temperature range of -65°C to 150°C.

6. Power Dissipation:

   • The maximum power dissipation is 60 mW at Vcc = 5V.
   • Ensure proper heat sinking if operating near the maximum power dissipation.

7. Pin Configuration:

   • Pin 1: NC (No Connect)
   • Pin 2: NC (No Connect)
   • Pin 3: NC (No Connect)
   • Pin 4: GND (Ground)
   • Pin 5: IN+ (Non-inverting Input)
   • Pin 6: IN- (Inverting Input)
   • Pin 7: Vout (Output)
   • Pin 8: Vcc (Positive Supply)

8. Handling Precautions:

   • Handle the device with care to avoid static discharge.
   • Use appropriate ESD protection when handling the device.

By following these instructions, you can effectively use the AD694JNZ logarithmic amplifier in your circuits.

(For reference only)