L38812 datasheet(4/8 Pages) UTC

Part #	L38812

Description	LINEAR INTEGRATED CIRCUIT

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Manufacturer	UTC [Unisonic Technologies]

Direct Link	http://www.utc-ic.com

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UTC L388 12 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO. LTD

4

QW-R108-013,A

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

+TxIn input impedance

80

100

120

kΩ

-TxIn input impedance

2.4

3.0

3.6

kΩ

-RxIn input impedance

16

20

24

kΩ

Txout ac, load impedance

10

kΩ

Rxout ac, load impedance

10

kΩ

F2out ac, load impedance

10

kΩ

F5out ac, load impedance

10

kΩ

Transmitter channel output swing, VTXOut 2% distortion, RTxout=RRxout=25 kΩ

500

mVp

Receiver channel output swing, VRxOut

2% distortion, RTxout=RRxout=25 kΩ

500

mVp

Transmitter output noise, VTxOut

VCMP=VRef-0.1V,vTXIn=0V

-75

dBpsof

Receiver output noise, VRxOut

VCMP=VRef+0.1V,vRXIn=0V

-75

dBA

TxDet sink current, ITxDetOut

VtxDetIn=VRef+0.1V

-6.0

-2.5

mA

RxDet source current, IRxDetOut

VRxIn=VRef-0.1V

2.5

6.0

mA

TxDet source current, ITxDet

VCMP=VRef-0.1V

30

μ

A

RxDet sink current, IRxDetOut

VRxDetIn=VRef+0.1V

-30

μ

A

TxDet swing relative to VRef, VTxDetOut

VTxDetIn=VRef+0.1V

(note 2)

-0.7

V

RxDet swing relative to VRef, VRxDetOut

VRxDetIn=VRef-0.1V

(note 2) +0.7

V

NDet sink current (fast charge), INDet

VTxDetIn=VRef-0.1V

VCMP=VRef-0.1V

-4.5

-1.5

mA

NDet source current, INDet

VTxDetIn=VRef+0.1V

VCMP=VRef+0.1V

3

5

7

μ

A

NDet Ieakage current(hold),INDet

VTxDetIn=VRef-0.1V

VCMP=VRef+0.1V

-100

nA

NDet swing relative to VRef,VNDet

VCMP=VRef-0.1V

VTxDetIn=VRef+0.1V

-0.45

V

CMP(comparator) sensitivity,

Transmit(Tx) mode to receive

(Rx) mode or vice versa

Tx mode=max Tx gain,

Rx mode=max Rx gain

50

100

mV

CTR voltage for 25 dB dynamics,VCTR

VCMP=VRef+0.35V,RCTR=100kΩ

V+

V

CTR voltage for mute,ICTR

VCMP=VRef+0.35V

μ

A

CTR voltage for disable,VCTR

0.55

V

Notes:

VNDet-VRef

1. 20· log (

)

VTxDet-VTxDetO

VNDet=voltage at noise detector output

VRef=reference voltage (about 1.9V)

VTxDet=Voltage at transmit detector output

VTxDetO=voltage at transmit detector at the point

when the voltage at the noise detector starts

moving when a signal at transmit channel input is

gradually increased (threshold, typical value 30 mV)

2.

Depends on V+. Channels are tracking.

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