ST70136B STMICROELECTRONICS [STMicroelectronics], ST70136B Datasheet

no-image

ST70136B

Manufacturer Part Number
ST70136B
Description
CPE ADSL ANALOG FRONT END
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ST70136BA
Manufacturer:
ST
0
INTRODUCTION
The ST70136 ADSL Analog Front End (AFE) chip
implements the analog transceiver functions
required in a Customer Premise ADSL modem. It
connects the digital modem chip with the loop
driver and hybrid balance circuits.
The AFE has been designed with high dynamic
range in order to greatly reduce the external filter-
ing requirements at the front end.
The AFE chip and its companion digital chip along
with a loop driver, implement the complete
G.992.2 and G.992.1 DMT modem solution.
Figure 1 : Overall Application Block Diagram
September 2001
WIDE TRANSMIT AND RECEIVE DYNAMIC
RANGE
FILTERING REQUIREMENTS
RECEIVE PROGRAMMABLE GAIN: 0 TO
31dB GAIN IN 1dB STEPS
RECEIVE PROGRAMMABLE ATTENUATOR
0,-4dB, -8dB, -12dB
12-BIT A/D CONVERTER IN RECEIVE PATH
TRANSMIT PROGRAMMABLE GAIN: 0 TO
-15dB IN 1dB STEPS
14-BIT D/A CONVERTER IN TRANSMIT PATH
LOW POWER MODE: 10mW IN LISTENING
MODE, 250 W IN POWER DOWN
TONE DETECTOR: ACTIVITY DETECTION
FOR WAKE-UP FUNCTION
64-PIN TQFP PACKAGE
64-PIN LFBGA PACKAGE
0.50 m, 5V BICMOS TECHNOLOGY
3.3V DIGITAL INTERFACE
5V ANALOG INTERFACE
Software for Control xDSL
PC
TO
USB
PCI
or
REDUCE
USB
PCI
or
ST70137
EXTERNAL
DMT
CPE ADSL ANALOG FRONT END
ST70136
xDSL
AFE
The AFE receive path contains a programmable
gain amplifier (RxPGA), a low pass anti-aliasing
filter, and a 12-bit A/D converter. The RxPGA is
digitally programmable from 0 to 31dB in 1dB
steps.
The AFE transmit path consists of a 14-bit D/A
converter, followed by a programmable gain
amplifier (TxPGA). The transmit gain is program-
mable from 0 to -15dB in 1dB steps.
ORDER CODE: ST70136G
ORDER CODE: ST70136B
TS612/TS652
TQFP64 Full Plastic
(10 x 10 x 1.40 mm)
DRIVER
(8 x 8 x 1.7 mm)
LOOP
LFBGA64
HYBRID
ST70136
LINE
1/24

Related parts for ST70136B

ST70136B Summary of contents

Page 1

... The transmit gain is program- mable from 0 to -15dB in 1dB steps. PCI xDSL or DMT AFE USB ST70137 ST70136 ST70136 TQFP64 Full Plastic ( 1.40 mm) ORDER CODE: ST70136G LFBGA64 ( 1.7 mm) ORDER CODE: ST70136B LOOP HYBRID DRIVER TS612/TS652 LINE 1/24 ...

Page 2

VSS TEST NRESET VDD PWD SUSPEND VDDA2 VSSA2 VSAD VSRX VSSA1 RXP RXN VDDA1 VDDA3 IREF50U VDDOSC XTALO XTALI VSSOSC VSSESD VSSA6 VCOCAP IVCO VCXOUT TOP TON VDDA6 GC0 GC1 VDDA5 VSSA5 ...

Page 3

PIN LIST The following list gives the different PIN Types: AI Analog Input AIO Analog Input/Output AO Analog Ouptut DI Digital Input DIO Digital Input/Output Table 1 : Pin Assignment Pins Name TQFP LFBGA 1 B2 CTRLIN 2 ...

Page 4

ST70136 Table 1 : Pin Assignment (continued) Pins Name TQFP LFBGA 29 H7 RXN 30 G6 VDDA1 31 F5 VDDA3 32 H8 IREF50U 33 G8 V3P75V 34 G7 VSBIAS 35 F7 V375AD 36 F8 V250AD 37 F6 V125AD 38 E7 ...

Page 5

PIN DESCRIPTION 2.1 - Analog Power Supplies These pins are the positive analog power supply voltage for the DAC and the ADC section not internally connected to digital supply. In any case the voltage on these ...

Page 6

ST70136 2.11.2 - TOP This pin is the differential non-inverting tone detector input. 2.11.3 - ACTD This pin is active when tone has been detected in sleeping mode (see control register) 2.12 - CRYSTAL These pins must ...

Page 7

BLOCK DIAGRAM XTALI XTALO 62 63 INTERNAL VCXO CLOCK GENERATOR 1 TX0 16 1 TX1 15 1 TX2 14 1 TX3 13 DATA 6 CLKM INTERFACE 1 RX0 11 1 RX1 10 1 RX2 9 1 RX3 8 ...

Page 8

ST70136 4 - FUNCTIONAL DESCRIPTION 4.1 - General The ST70136 consists of the following functional blocks: – Transmit Signal Path – Receive Signal Path – Bias Voltage and Current Generation – Digital Data Interface – Control Serial Interface – Tone ...

Page 9

Figure 2 : Digital Data Interface CLKM 35.328MHz CLKWD 8.832MHz TX[0]/RX[0] a0 TX[1]/RX[ TX[2]/RX[2] TX[3]/RX[3] a3 a15 TX DATA Sign a15 RX DATA Sign 4.7 - Control Serial Interface There is a 4-pin serial digital interface (CLKWD, CTRLIN, ...

Page 10

ST70136 Figure 4 : Control Register Interface Read cycle CLKM CLKWD b15 Don’t care CTRLIN CTRLOUT R/NW 4.7.1 - AFE registers 4.7.1 Gain Control This register is located at the address “000” and is used to program the ...

Page 11

Special Features Configuration This register is located at the address “010” and is used to configure different blocks. Table 4 : Adsl Configuration (address [b2:b0]=”010”) Name Pos. Reserved 14.13 VCO-DAC 12 Other 11.4 FVCXO 3 4.7.1.4 - VCXO ...

Page 12

ST70136 4.8 - Tone Detector The tone detector is dedicated for remote activation. It operates during SUSPEND mode with PWD = 0 only. When the tone detector level received Vin over tone greater than 15 V ...

Page 13

Reset Timing Figure 6 : Reset Timing V VDD 7ms max XTAL Reset CLKM CLKWD SUSPEND 4.9.3 - Mode Management Timing Figure 7 : Mode Management Tone detector: XTAL CLKM SUSPEND PWD Stand by mode 5ms done by ...

Page 14

ST70136 5 - SPECIFICATIONS 5.1 - Absolute Maximum Ratings Supply Voltage(AVDD,DVDD) Input Voltage Input current per pin Output current per pin Storage Temperature ESD Protection General DC Specification Parameter AVDD DVDD - Active Analog Digital Oscillator - Listening Analog Digital ...

Page 15

Receive Path Specifications 70°C unless otherwise specified. The following specifications are guaranteed only when the Digital Control Interface is not active. Table 9 : Receive Path Specifications Typical specifications apply for VCC = 5.0V, ...

Page 16

ST70136 5.4 - Transmit Path Specifications 70°C unless otherwise specified. The following specifications are guaranteed only when the Digital Control Interface is not active. Table 10 : Transmit Path Specifications Typical specifications apply for VCC = ...

Page 17

Figure 8 : Tone Detector Schematic ACTD (PAD) Table 11 : Tone DetectorSpecifications Description Zin listening mode Zin normal mode Minimum differential input signal Maximum diffential input signal VCM input 5.5 - VCXO Unless otherwise noted, typical specifications apply for ...

Page 18

ST70136 70°C unless otherwise specified. Table 12 : DAC 8B Specifications Typical specifications apply for VCC = 5.0V, temperature = 27°C, nominal process and bias current. Maximum and minimum performance is with VCC ±5%, 0°C < ...

Page 19

Data and Control Timing Interface 70°C unless otherwise specified. A Figure 10 : Data and Control Timing Interface CLKM Tc CLKWD RX[0:3] TX[0:3] Ts CTRLIN CTRLOUT R/NW Symbol Description Tva Data valid time Ts ...

Page 20

ST70136 Figure 11 : Application Schematic ST70136 20/24 ...

Page 21

Figure 12 : CPE Application Synoptic & & ...

Page 22

ST70136 6 - PACKAGE MECHANICAL DATA Figure 13 : Package TQFP64 Full Plastic ( 1.40 mm Dimensions Minimum A A1 0.05 A2 1.35 B 0. ...

Page 23

PACKAGE MECHANICAL DATA Figure 14 : Package LFBGA64 ( 1.7 mm) BALL 1 IDENTIFICATION (64 PLACES) e ...

Page 24

ST70136 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its ...

Related keywords