Part Number: HDC3020
Tool/software:
This guide serves to help engineers understand what is needed to replace the EOL HS4x humidity sensors from Renesas with TI’s HDC3x temperature and humidity sensors. This guide will cover how to replace both analog and digital humidity sensors from Renesas. An overview is provided below illustrating compatible parts:
|
Analog |
Digital |
||
|
Renesas |
Texas Instruments |
Renesas |
Texas Instruments |
|
HS4101 (±1.5% RH) |
HDC3120 (±0.5%RH) |
HS4001 (±1.5% RH) |
HDC3020 (±0.5% RH) |
|
HS4103 (±2.5% RH) |
HS4003 (±2.5% RH) |
||
|
HS4111 (±1.5%, Membrane) |
— |
HS4011 (±1.5%, Membrane) |
HDC302x (±0.5%, Tape/IP67Filter) |
|
HS4113 (±2.5%, Membrane) |
— |
HS4013 (±2.5%, Membrane) |
|
---Digital Parameter Comparison---
| Parameter | HDC3x | HS40xx | HDC3x Benefits |
| Interface | I2C | I2C | - |
| Supply Voltage Range | 1.62V to 5.5V | 1.71V to 3.6V | Support for wider input voltage |
| Operating Humidity Range | 0% RH to 100% RH | 0% RH to 100% RH | Comparable humidity range |
| Humidity Accuracy (Typ) | ±0.5% RH (from 10%-50% RH) ±1.0% RH (from 10%-80% RH) ±1.5% RH (from 10%-90% RH) |
HS40x1 Typ RH Accuracy ±1.5% RH (from 10%-90% RH) HS40x3 Typ RH Accuracy ±2.5% RH (from 20%-80% RH) ±3.0% RH (from 10%-90% RH) |
Higher RH accuracy across more of the RH range |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | Comparable temperature range |
| Temperature Accuracy (Typ) | ±0.1°C (from -40°C to 125°C) | HS40x1 Typ Temp Accuracy ±0.2°C (from -10°C to 80°C) ±0.5°C (from -40°C to 125°C) HS40x3 Typ Temp Accuracy ±0.25°C (from 0°C to 70°C) ±0.8°C (from -40°C to 125°C) |
Higher temperature accuracy across more of the temperature range |
| Automotive AEC-Q100 Grade Available? | Yes | Yes | AEC-Q100 Grade 1 |
| Package Size | 8-Pin WSON 2.50 x 2.50 x 0.75mm |
8-Pin WSON 2.50 x 2.50 x 0.9mm |
~17% thinner package height Footprint compatible* |
| Open Cavity Orderable | Commericial HDC3020DEFR Automotive HDC3020QDEFRQ1 |
±1.5%RH Typ Accuracy HS4001 ±2.5%RH Typ Accuracy HS4003 |
- |
| Removable Polyimide Tape Orderable | Commericial HDC3021DEHR Automotive HDC3021QDEHRQ1 |
- | Removable tape cover to protect sensor element during board manufacturing (conformal coating, solder reflow, etc.) |
| Permanent IP67 Rated Environmental Filter Orderable | Commericial HDC3022DEJR Automotive HDC3022QDEJRQ1 |
±1.5%RH Typ Accuracy HS4011 ±2.5%RH Typ Accuracy HS4013 |
- |
---Analog Parameter Comparison---
| Parameter | HDC3120 | HS41xx | HDC3120 Benefits |
| Interface | Ratiometric Analog | Ratiometric Analog | - |
| Supply Voltage Range | 1.62V to 5.5V | 1.71V to 3.6V | Support for wider input voltage |
| Operating Humidity Range | 0% RH to 100% RH | 0% RH to 100% RH | Comparable humidity range |
| Humidity Accuracy (Typ) | ±0.5% RH (from 10%-50% RH) ±1.0% RH (from 10%-70% RH) ±1.5% RH (from 10%-90% RH) |
HS41x1 Typ RH Accuracy ±1.5% RH (from 10%-90% RH) HS41x3 Typ RH Accuracy ±2.5% RH (from 20%-80% RH) ±3.0% RH (from 10%-90% RH) |
Higher RH accuracy across more of the RH range |
| Operating Temperature Range | -40°C to 125°C | -40°C to 105°C | Wider temperature range |
| Temperature Accuracy (Typ) | ±0.2°C (from -20°C to 100°C) ±0.3°C (from -40°C to 125°C) |
HS41x1 Typ Temp Accuracy ±0.2°C (from -10°C to 80°C) ±0.4°C (from -40°C to 105°C) HS41x3 Typ Temp Accuracy ±0.25°C (from 0°C to 70°C) ±0.6°C (from -40°C to 105°C) |
Higher temperature accuracy across more of the temperature range |
| Automotive AEC-Q100 Grade Available? | Yes | Yes | AEC-Q100 Grade 1 |
| Package Size | 8-Pin WSON 2.50 x 2.50 x 0.75mm |
8-Pin WSON 2.50 x 2.50 x 0.9mm |
~17% thinner package height Footprint compatible* |
| Open Cavity Orderable | Commericial HDC3120DEFR Automotive HDC3120DEFRQ1 |
±1.5%RH Typ Accuracy HS4101 ±2.5%RH Typ Accuracy HS4103 |
- |
| Removable Polyimide Tape Orderable | - | - | - |
| Permanent IP67 Rated Environmental Filter Orderable | - | ±1.5%RH Typ Accuracy HS4111 ±2.5%RH Typ Accuracy HS4113 |
- |
---Footprint and Layout Considerations---
The HS4x devices share nearly identical footprints with the HDC3x with the exception of the thermal pad and pins. The HDC3x’s thermal pad is 1.6 mm tall x 1.2 mm wide, while the HS4x is 1.8 mm tall x 0.852 mm wide. The pins on the HDC3x measure 0.25 mm tall x 0.6 mm wide, while the pins on the HS4x measure 0.25 mm tall x 0.5 mm wide (when the pins are in the horizontal orientation). This however should not have a negative impact on layout as the HDC3x devices should be able to make full contact with the footprints of the HS4x sensors.
Note: All measurements in millimeters.
For the pin configuration, two tables (for Analog and Digital parts) have been provided to compare the pinouts between devices as well as appropriate connections to make:
HDC3x & HS4x Pinout – Digital I²C
|
Pin # |
HDC302x |
HS40xx |
|
1 |
SDA – I²C Data |
SDA – I²C Data |
|
2 |
ADDR – I²C Address Select |
NC – No Connect |
|
3 |
ALERT – Interrupt Output (Float if not used) |
ALERT – Interrupt Output |
|
4 |
SCL – I²C Clock |
SCL – I²C Clock |
|
5 |
VDD – Power Supply |
VDD – Power Supply |
|
6 |
nRESET – Reset (Active Low) (Connect to VDD if not used) |
NC – No Connect |
|
7 |
ADDR1 – I²C Address Select |
NC – No Connect |
|
8 |
GND – Ground |
VSS – Ground |
|
9 (Pad) |
Thermal Pad – Connect to GND |
DAP (Thermal Pad) - Connect to GND |
HDC3120 & HS41x Pinout - Analog
|
Pin |
HDC3120 |
HS41xx |
|
1 |
VDD – Power Supply |
VDD – Power Supply |
|
2 |
GND – Ground |
GND – Ground |
|
3 |
RH – Analog Humidity Output |
VRH – Analog Humidity Output |
|
4 |
TEMP – Analog Temperature Output |
VT – Analog Temperature Output |
|
5 |
RESET_EN – Enable Pin (VDD if not used) |
NC – No Connect (VDD) |
|
6 |
GND – Ground |
NC – No Connect (GND) |
|
7 |
HEAT_EN – Heater Enable (GND if not used) |
NC – No Connect (GND) |
|
8 |
GND – Ground |
NC – No Connect |
|
Pad |
Thermal Pad – Connect to GND or Float |
DAP (Thermal Pad) - Connect to GND |
---Software Compatibility---
Although the HDC3x and HS4x share a similar pinout scheme and dimensions, special considerations must be taken when migrating software interface to the HDC3x. The HDC3x utilizes a command-based interface scheme and a table is provided on page 18 of the datasheet with all the possible commands for the HDC3x. Due to the HDC3x providing a wider array of features and customization, some key differences for communicating with the HDC3x are highlighted below:
For quick and easy prototyping with Arduino, users can use the code provided here. For further software and driver development, see the HDC302x’s SysConfig page to get started with code development.
---Analog Compatibility---
For the analog variants of the humidity sensors (HDC312x and HS41xx), the table above can be referenced for pinout comparisons. Much like the digital variants, the pinout is nearly identical with the exception of the HDC3120 featuring a pin for heater control and reset. These pins can be connected to GND and VDD respectively (Heater -> GND; nReset -> VDD) if not used.
Documents
HDC302x Datasheet - Digital
HDC312x Datasheet - Analog
Evaluation Boards
