AMC131M02DFMR datasheet(20/89 Pages) TI

20 / 89 page

reverse breakdown voltage. Take care to prevent input voltages or currents from exceeding the limits provided in

the Absolute Maximum Ratings table.

8.3.5 Input Multiplexer

Each channel of the AMC131M02 has a dedicated input multiplexer. The multiplexer controls which signals are

routed to the ADC channels. Configure the input multiplexer using the MUXn[1:0] bits in the CHn_CFG register.

The input multiplexer allows the following inputs to be connected to the ADC channel:

• The analog input pins corresponding to the given channel

• HGND, which is used for offset calibration

• Positive DC test signal

• Negative DC test signal

See the Internal Test Signals section for more information about the test signals. Figure 8-4 shows a diagram of

the input multiplexer on the AMC131M02.

AINnP

HGND

AINnN

DC Test

Signal

–

To Positive

PGA Input

To Negative

PGA Input

MUXn[1:0] = 00

MUXn[1:0] = 01

MUXn[1:0] = 10

MUXn[1:0] = 11

Figure 8-4. Input Multiplexer

8.3.6 Programmable Gain Amplifier (PGA)

Each channel of the AMC131M02 features an integrated programmable gain amplifier (PGA) that provides gains

of 1, 2, 4, 8, 16, 32, 64, and 128. The gains for all channels are individually controlled by the PGAGAINx[2:0] bits

for each channel in the GAIN register.

Changing the PGA gain scales the differential full-scale input voltage range (FSR) of the ADC. Equation 3

describes the relationship between FSR and gain. Equation 3 uses the internal reference voltage, 1.2 V, as the

scaling factor without accounting for gain error caused by tolerance in the reference voltage.

FSR = ±1.2 V / Gain

(3)

Table 8-1 shows the corresponding full-scale ranges for each gain setting.

Table 8-1. Full-Scale Range

GAIN SETTING

FSR

±1.2 V

±600 mV

±300 mV

±150 mV

±75 mV

±37.5 mV

±18.75 mV

128

±9.375 mV

AMC131M02

SBASA56 – SEPTEMBER 2023

www.ti.com

Submit Document Feedback

Product Folder Links: AMC131M02

AMC131M02DFMR bảng dữ liệu(PDF) 20 Page - Texas Instruments

AMC131M02DFMR bảng dữ liệu(HTML) 20 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89

bảng dữ liệu tải về

Link URL