IDAC_OUT =

1

LM10011

SNVS822A – DECEMBER 2012 – REVISED NOVEMBER 2014

www.ti.com

Typical Application (continued)

8.2.1 Design Requirements

Table 4 lists the design parameters.

Table 4. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Output voltage range

0.7 V to 1.1 V

Startup voltage

1.1 V

Mode

0

8.2.2 Detailed Design Procedure

(1)

The change in the output voltage can be analyzed based on the resolution of the current DAC from the LM10011

(2)

Where LSB = LSB_6 (940 nA) from the electrical characteristics table (see Electrical Characteristics). Based on

using Equation 1.

8.2.2.2 4-Bit Mode Design Example

Designing with the LM10011 in 4-bit mode is similar to designing in 6-bit mode. The only differences are the LSB

value (LSB = LSB_4 = 3.76 µA) in Equation 2 and full-scale current range (IDAC_OUT = 56.4 µA).

a start-up code to yield a current closely matching the calculated result. Use the equation below to solve for the

required IDAC_OUT value at start-up.

(3)

8.2.2.4 Example Solution

While in 6-bit mode, assuming a 400-mV output range, 64 VID codes, and an IDAC LSB of 0.940 µA, it is desired

(4)

(5)

14

Submit Documentation Feedback

Copyright © 2012–2014, Texas Instruments Incorporated

Product Folder Links: LM10011