# RCV420KP

**Texas Instruments** · Operational Amplifier · PDIP-16

RCV420KP from Texas Instruments, in a PDIP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | -In | input | Inverting current input for the 4-20mA loop signal, with a common-mode input range of ±40V. |
| 2 | CT | passive | Center tap of the two matched 75Ω sense resistors, returned to ground to complete the current path. |
| 3 | +In | input | Non-inverting current input for the 4-20mA loop signal, with a common-mode input range of ±40V. |
| 4 | V- | power_in | Negative power supply; rated -15V, with a specified range of -11.4V to -18V and an absolute maximum supply of ±22V. |
| 5 | Ref Com | power_in | Common (ground) return for the 10V voltage reference. |
| 6 | NC | unconnected | No internal connection. |
| 7 | Ref Noise Reduction | passive | Connect an external capacitor to ground here to reduce reference high-frequency noise, for example 0.1µF lowers it to about 200µVp-p at the reference output. |
| 8 | Ref Trim | passive | Voltage reference output trim input, giving a typical trim range of ±4%. |
| 9 | NC | unconnected | No internal connection. |
| 10 | Ref fB | passive | Reference amplifier feedback connection, wired to Ref Out in the reference circuit; the datasheet gives no separate electrical limits for this pin. |
| 11 | Ref Out | output | 10V precision reference output, 10.01V typical with a drift of 5ppm/°C, rated for +10mA and -2mA output current. |
| 12 | Ref In | input | Level-shifting input for the reference, attenuated 8:1 to Rcv Out, and must be grounded if not used for level shifting to maintain high CMR. |
| 13 | Rcv Com | power_in | Receiver common (ground) connection, which requires a low source impedance to maintain high CMR. |
| 14 | Rcv Out | output | Receiver output that converts the 4-20mA input to a 0 to 5V signal, rated for +10mA and -5mA output current. |
| 15 | Rcv fB | passive | Receiver amplifier feedback pin, where a small resistor may be inserted in the feedback path to increase gain. |
| 16 | V+ | power_in | Positive power supply; rated +15V, with a specified range of +11.4V to +18V and an absolute maximum supply of ±22V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-16 |
| Category | Operational Amplifier/Comparator |
| Pins | 16 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Sense Resistance |  | 74.25 | 75 | 75.75 | Ω |  | 2 |
| Error |  |  | 0.05 | 0.15 | % of span |  | 2 |
| Nonlinearity |  |  | 0.0002 | 0.002 | % of span |  | 2 |
| CMR |  | 70 | 80 |  | dB |  | 2 |
| Offset Voltage vs Supply |  |  | 74 | 90 | dB | vs Supply (±11.4V to ±18V) | 2 |
| Zero Error Initial |  |  | 0.025 | 0.075 | % of span | Initial, with 4mA input signal and Voltage Reference connected | 2 |
| Rated Voltage |  |  | 10 | 12 | V | IO = +10mA, -5mA | 2 |
| Rated Current |  | -5 |  | 10 | mA | EO = 10V | 2 |
| Current Limit |  | -13 |  | 49 | mA | To Common | 2 |
| Capacitive Load |  |  |  | 1000 | pF | Stable Operation | 2 |
| Common-Mode Voltage |  | -40 |  | 40 | V |  | 2 |
| Initial Voltage Reference |  | 9.99 |  | 10.01 | V | Initial | 2 |
| Trim Range |  | -4 |  | 4 | % |  | 2 |
| Output Current (Voltage Reference) |  | -2 |  | 10 | mA |  | 2 |
| Voltage Range |  |  |  | 18 | V | Voltage Range ±18 V maximum; printed as -5, +11.4 ±18 V | 2 |
| Quiescent Current |  |  | 3 | 4 | mA | VO = 0V | 2 |
| Specification Temperature Range |  | 0 |  | 70 | °C |  | 2 |
| Operation Temperature Range |  | -25 |  | 85 | °C |  | 2 |
| Storage Temperature Range |  | -40 |  | 85 | °C |  | 2 |
| Thermal Resistance, θJA | θJA |  | 80 |  | °C/W |  | 2 |
| Supply |  | -22 |  | 22 | V | ±22V | 3 |
| Input Current, Continuous |  |  |  | 40 | mA | Continuous | 3 |
| Input Current Momentary |  |  |  | 250 | mA | 0.1s, 1% duty cycle | 3 |
| Common-Mode Input Voltage, Continuous |  | -40 |  | 40 | V | Continuous | 3 |
| Lead Temperature |  |  |  | 300 | °C | Soldering, 10s | 3 |

## CAD (KiCad official)

- Symbol: `RCV420KP`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: PDIP-16 (KiCad packages3D, STEP)
- 3D model files: `rcv420kp-etched.step` / `rcv420kp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rcv420kp.step` / `rcv420kp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](docs/rcv420kp-datasheet.pdf) (14 pp, sha256 `7a361903e2c54507`, retrieved 2026-11-02, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/rcv420kp-datasheet.pdf)