DM505 datasheet(95/286 Pages) TI1

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DM505

www.ti.com

SPRS976A – NOVEMBER 2016 – REVISED JANUARY 2017

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Specifications

Table 5-13. Analog-to-Digital ADC Subsystem Electrical Specifications (continued)

over operating free-air temperature range (unless otherwise noted)

PARAMETER

CONDITIONS

MIN

NOM

MAX

UNIT

Signal-to-Noise Plus

Distortion

1.8 Vpp, 30 kHz sine wave

adc_vrefp Input Impedance

Sampling Dynamics

Time from Start to Start

Clock Cycles

Conversion Time + Error Correction

10 + 1

Clock Cycles

Acquisition time

Clock Cycles

Throughput Rate

CLK = 20 MHz (Pin : clk)

MSPS

Channel to Channel Isolation

ADC Clock Frequency

See

Table 5-1

MHz

(1) Connect adc_vrefp to vdda_adc when not using a positive external reference voltage.

(2) This parameter is valid when the respective AIN terminal is configured to operate as a general-purpose ADC input.

(3) The maximum sample rate assumes a conversion time of 13 ADC clock cycles with the acquisition time configured for the minimum of 2

ADC clock cycles, where it takes a total of 15 ADC clock cycles to sample the analog input and convert it to a positive binary weighted

digital value.

5.8

Thermal Characteristics

For reliability and operability concerns, the maximum junction temperature of the Device has to be at or

below the TJ value identified in , Recommended Operating Conditions.

A BCI compact thermal model for this Device is available and recommended for use when modeling

thermal performance in a system.

Therefore, it is recommended to perform thermal simulations at the system level with the worst case

device power consumption.

5.8.1

Package Thermal Characteristics

Table 5-14 provides the thermal resistance characteristics for the package used on this device.

NOTE

Power dissipation of 4.14 W and an ambient temperature of 65ºC is assumed for ABF

package.

Table 5-14. Thermal Resistance Characteristics

NO.

PARAMET

DESCRIPTION

°C/W(1)

AIR FLOW (m/s)(2)

RΘJC

Junction-to-case

1.41

N/A

RΘJB

Junction-to-board

5.96

N/A

RΘJA

Junction-to-free air

15.4

Junction-to-moving air

13.1

12.2

11.6

ΨJT

Junction-to-free air

0.94

Junction-to-package top

0.94

T10

0.94

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