AD637JRZ from Analog Devices, in a SOIC-16-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	NC	unconnected	No connect. Leave floating.
2	CAV	passive	Averaging capacitor connection. External capacitor sets the averaging time constant of the rms computation.
3	-VS	power_in	Negative supply voltage. Typically -3 V to -18 V.
4	COM	power_in	Common (analog ground) return.
5	NC	unconnected	No connect. Leave floating.
6	BUF IN	input	Buffer amplifier input. High impedance input to the on-chip buffer amplifier, typically used for post-filtering or as an input buffer.
7	dB OUT	output	Logarithmic (dB) output. Provides an output proportional to the log of the rms input, useful for wide dynamic range measurements.
8	BUF OUT	output	Buffer amplifier output. Low impedance output of the on-chip buffer amplifier.
9	NC	unconnected	No connect. Leave floating.
10	OUTPUT OFFSET	input	Output offset trim. Connect to a potentiometer between +VS and -VS to null the output offset voltage.
11	OUTPUT	output	RMS output. Provides the true rms (or mean square / absolute value depending on configuration) of the input signal.
12	SUMMING JUNCTION	input	Summing junction of the output amplifier. Access for external feedback and gain-setting resistors.
13	+VS	power_in	Positive supply voltage. Typically +3 V to +18 V.
14	dB COMMON	passive	dB output common. Reference/return pin for the dB output scaling network.
15	INPUT	input	Signal input to the RMS converter. Accepts AC signals up to the specified bandwidth; typically 1 V rms full scale.
16	NC	unconnected	No connect. Leave floating.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	SOIC-16-300mil
Category	Data Acquisition
Pins	16

Ordering variants

Same part, different packaging or reel option.

AD637JRZ
AD637JRZ-R7
AD637JRZ-RL
AD637JRZKRZ
AD637JRZKRZ-R7
AD637JRZKRZ-RL
AD637JRZSQ
AD637JRZSQ/883B
AD637JRZAQ
AD637JRZBQ

CAD (KiCad official)

Symbol: AD637JRZ
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16-300mil (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Analog Devices datasheet (25 pp, sha256 3171019912ad7953, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF