Data Sheet

ADL5513

APPLICATIONS INFORMATION

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Rev. B | 18 of 25

Figure 36. VOUT vs. TADJ at 85°C, 1900 MHz

Figure 37 shows the results of sweeping VTADJ over multiple tem-

peratures while holding PIN constant. The same VTADJ should be

used for the full dynamic range for a specified supply operation.

DEVICE CALIBRATION

VTADJ voltages in Table 4 are chosen so that the error is at its

minimum at 85°C. Criteria for the choice of VTADJ is unique for a

given application. Figure 37 shows how error on a typical device

changes at INHI = −30 dBm when VTADJ is swept at different

temperatures. If the ADL5513 must have minimum error at a certain

temperature, then VTADJ should be chosen such that the line for

that temperature intersects the 25°C line. At this VTADJ setting, the

error at all other temperatures is not the minimum. If the deviation

of error over temperature is more important than the error at a

single temperature, VTADJ should be determined by the intersection

of the lines for the temperatures of interest. For the characterization

data presented, VTADJ values were chosen so that ADL5513 has

a minimum error at 85°C, which is at the intersection of the lines

for 85°C and 25°C. For example, at 1900 MHz, VTADJ = 0.8 V. If a

given application requires error deviation to be at a minimum when

the temperature changes from −40°C to 85°C, VTADJ is determined

by the intersection of the error line for those temperatures.

Figure 37. Error vs. VTADJ, PIN = −30 dBm at 1900 MHz

It is important that temperature adjustment be performed on multi-

ple devices.

POWER-DOWN FUNCTIONALITY

Power-down functionality of ADL5513 is achieved through external-

ly applied voltage on the TADJ pin. If VTADJ = VPOS − 0.3 V, the

output voltage and supply current are close to 0.

Figure 38. VOUT vs. VTADJ at 100 MHz, VPOS = 5 V

Figure 39. Sleep Current vs. VTADJ, VPOS = 5 V

MEASUREMENT MODE

When the VOUT voltage or a portion of the VOUT voltage is fed back

to the VSET pin, the device operates in measurement mode. As

shown in Figure 40, the ADL5513 has an offset voltage, a positive

slope, and a VOUT measurement intercept at the low end of its input

signal range.