The REF50xx is a family of low-noise, low-drift, very high precision voltage references. These references are capable of both sinking and sourcing current, and have excellent line and load regulation.
Excellent temperature drift (2.5ppm/°C) and high accuracy (0.025%) are achieved using proprietary design techniques. These features, combined with very low flicker noise (0.5μVPP/V), make the REF50xx family an excellent choice for use in high-precision data acquisition systems. REF50 family is available in enhanced grade (REF50xxEI), high grade (REF50xxI) and standard grade (REF50xxAI). The reference voltages are offered in 8-pin SOIC and VSSOP packages and are specified from –40°C to 125°C.
The REF50xxEI supports wide supply voltage rating of 42V with ultra-low IQ of 340μA. The wide supply range allows for direct connection to the battery or field supply. This also protects the device in case of power supply IC failure.
PART NUMBER | PACKAGE (1) | BODY SIZE (NOM) (2) |
---|---|---|
REF50xxI , REF50xxAI | SOIC (8) | 4.90mm × 3.91mm |
VSSOP (8) | 3.00mm × 3.00mm | |
REF50xxEI | SOIC (8) | 4.90mm × 3.91mm |
PRODUCT | Voltage | ||||
---|---|---|---|---|---|
SOIC (8) | VSSOP (8) | ||||
NA | REF5020ID | REF5020AID | REF5020IDGK | REF5020AIDGK | 2.048V |
REF5025EID | REF5025ID | REF5025AID | REF5025IDGK | REF5025AIDGK | 2.5V |
REF5030EID(1) | REF5030ID | REF5030AID | REF5030IDGK | REF5030AIDGK | 3V |
REF5040EID(1) | REF5040ID | REF5040AID | REF5040IDGK | REF5040AIDGK | 4.096V |
REF5045EID(1) | REF5045ID | REF5045AID | REF5045IDGK | REF5045AIDGK | 4.5V |
REF5050EID | REF5050ID | REF5050AID | REF5050IDGK | REF5050AIDGK | 5.0V |
NA | REF5010ID | REF5010AID | REF5010IDGK | REF5010AIDGK | 10.0V |
PIN | DESCRIPTION | ||
---|---|---|---|
NAME | REF50xxI, REF50xxA | REF50xxE | |
DNC | 1, 8 | 8 | Do not connect |
EN | - | 1 | Device enable control. Low level input disables the reference output and device enters shutdown mode. Device can be enabled by driving voltage > 1.6V or leaving the EN pin floating. |
VIN | 2 | 2 | Input supply voltage |
TEMP | 3 | 3 | Temperature monitoring pin. Provides a temperature-dependent output voltage |
GND | 4 | 4 | Ground |
TRIM/NR | 5 | - | Output adjustment or noise reduction pin |
NR | - | 5 | Noise reduction pin |
VOUT | 6 | 6 | Reference voltage output |
NC | 7 | No internal connection | |
NC | 7 | Leave it floating or connect it to GND |