1 Overview
The REF70EVM is an adjustable voltage reference evaluation module that demonstrates the REF70 integrated
circuit in its FKH ceramic package from Texas Instruments (TI).
The REF70 is a ultra-low noise voltage reference with 2 ppm/C temperature drift. The REF70 is used primarily
as a voltage reference for high accuracy data converters to allow for a larger noise free resolution.
The REF70 can be operated from V
REF
to 18 V, making this part optimal for a wide range of voltages for
applications such as precision data acquasition systems, industrial instrumentation, semiconductor test
equipment, and PLC analog I/O modules. In order for this device to operate as intended, it does require 6.5 mA
I
Q
(max) for proper operating across temperature. This device also comes with a enable pin that allows the
device to be set in shutdown mode. Under the shutdown condition, the REF70 only consumes 12 μA of current.
The REF70EVM is configured for a LCCC (FKH) ceramic package (U2) and includes a additional MSSOP (DGK)
landpattern for alternate packages (U1). The VIN header can be connected to an external power supply to
provide power. All of the REF70 input and output pins are accessible for external connection via test headers.
For users looking for a alternate packages to test the REF70, contact TI.
1.1 REF70EVM Features
• Includes: REF7025QFKH
• Footprints for resistors and capacitors
• Multiple outputs for voltage measurements
KEY PARAMETERS
PARAMETER
PARAMETER LIMITS
Supply Voltage:
IN
0 V – 18V
Enable Pin
EN
0V to IN
Fixed Output Voltage:
VREF
2.5 V (REF7025)
Output Current:
IOUT
-10 mA to 10 mA
CAUTION
Applying voltages above the limitations given in this table may cause permanent damage to your
hardware.
Overview
2
REF70EVM User's Guide
SNVU699 – OCTOBER 2020
Copyright © 2020 Texas Instruments Incorporated
