AFS090 datasheet(136/334 Pages) MICROSEMI

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Device Architecture

2- 12 0

R e v isio n 2

Temperature Monitor Using Analog Pad AT

External

Temperature

Monitor

(external diode

2N3904,

TJ = 25°C)4

Resolution

8-bit ADC

°C

10-bit ADC

°C

12-bit ADC

0.25

°C

Systematic Offset5

AFS090, AFS250, uncalibrated7

5°C

AFS090, AFS250, calibrated7

0°C

AFS600, AFS1500, uncalibrated7

°C

AFS600, AFS1500, calibrated7

0°C

Accuracy

±3

±5

°C

External Sensor Source

Current

High level, TMSTBx = 0

µA

Low level, TMSTBx = 1

100

µA

Max Capacitance on AT

pad

1.3

Internal

Temperature

Monitor

Resolution

8-bit ADC

°C

10-bit ADC

°C

12-bit ADC

0.25

°C

Systematic Offset5

AFS090, AFS250, uncalibrated7

5°C

AFS090, AFS250, calibrated7

AFS600, AFS1500 uncalibrated7

°C

AFS600, AFS1500 calibrated7

0°C

Accuracy

±3

±5

°C

tTMSHI

Strobe High time

105

µs

tTMSLO

Strobe Low time

µs

tTMSSET

Settling time

µs

Table 2-49 • Analog Channel Specifications (continued)

Commercial Temperature Range Conditions, TJ = 85°C (unless noted otherwise),

Typical: VCC33A = 3.3 V, VCC = 1.5 V

Parameter

Description

Condition

Min.

Typ.

Max.

Units

Notes:

1. VRSM is the maximum voltage drop across the current sense resistor.

2. Analog inputs used as digital inputs can tolerate the same voltage limits as the corresponding analog pad. There is no

reliability concern on digital inputs as long as VIND does not exceed these limits.

3. VIND is limited to VCC33A + 0.2 to allow reaching 10 MHz input frequency.

4. An averaging of 1,024 samples (LPF setting in Analog System Builder) is required and the maximum capacitance

allowed across the AT pins is 500 pF.

5. The temperature offset is a fixed positive value.

6. The high current mode has a maximum power limit of 20 mW. Appropriate current limit resistors must be used, based on

voltage on the pad.

7. When using SmartGen Analog System Builder, CalibIP is required to obtain 0 offset. For further details on CalibIP, refer

to the "Temperature, Voltage, and Current Calibration in Fusion FPGAs" chapter of the

Fusion FPGA Fabric User’s

Guide.

AFS090 Datasheet(PDF) 136 Page - Microsemi Corporation

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