GS12341 datasheet(48/109 Pages) SEMTECH

48 / 109 page

GS12341

Final Data Sheet

Rev.1

PDS-061928

August 2019

48 of 109

Semtech

Proprietary & Confidential

www.semtech.com

In the AC-coupled case, Vcmout is the common mode voltage at the driver side of the

AC-coupling capacitor placed near the driver. In the AC-coupled case, Vcmout does not

need to be within the Vcmin range specified by the downstream device. However, the

capacitor should have a voltage rating that exceeds |Vcmout-Vcmin|. In addition to the

voltage rating, the recommended value of the AC-coupling capacitor should be at least

4.7μF to meet the low cut-off frequency requirement of low transition density signals

such as the check-field pattern defined in SMPTE RP-198. The capacitor should have a

temperature rating that maintains the capacitance over the required operating range.

4.7.6 Output State Control Modes

The GS12341 provides several output state control modes to meet specific application

requirements. The trace driver has the following three output modes: operational,

muted, or disabled. During non-sleep, if the control modes are configured such that

multiple output modes are enabled, the priorities of the control modes from highest to

lowest are the following: disabled, and then muted. Section 4.7.6.1 through

Section 4.7.6.2 describe how to configure the output control modes that are enabled

during non-sleep.

If the device enters sleep, either manually or automatically, the sleep output control

modes take precedence over the non-sleep control modes. The default trace driver

configuration is for it to be disabled during sleep; however the trace driver can be

configured to mute during sleep by setting the CFG_SLEEP_OUTPUT<n>_MUTE

parameter in register 0x5 to 1b.

Table 4-9: ΔVDDO (mVppd) and VCMOUT(V) vs. DS Setting and VCCO

ΔVDDO (mVppd) vs. DS Setting

DC-Coupled

VCMOUT (V) vs. DS Setting

AC-Coupled

VCMOUT (V) vs. DS Setting

Vcco (V)

1.2

200

400

—

1.15

1.1

—

1.1

—

1.8

200

400

800

1.75

1.7

1.6

1.7

1.6

1.4

2.5

200

400

800

2.45

2.4

2.3

2.4

2.3

2.1

GS12341 Datasheet(PDF) 48 Page - Semtech Corporation

GS12341 Datasheet(HTML) 48 Page - Semtech Corporation

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 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL