Linear Technology DC1304A-A User manual

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DESCRIPTION
Demonstration Circuit DC1304A features two programmable
filter ICs, the LTC660 dual, matched, bandpass filter and the
LTC6603, dual, matched, lowpass filter.
The DC1304A
The DC1304AThe DC1304A
The DC1304A-
--
-A
AA
A is for
is for is for
is for an LTC660 and
an LTC660 and an LTC660 and
an LTC660 and
The DC1304A
The DC1304AThe DC1304A
The DC1304A-
--
-B is for
B is forB is for
B is for an LTC6603.
an LTC6603. an LTC6603.
an LTC6603.
The LTC®660 is a dual, programmable bandpass filter and
differential driver. The selectivity of the LTC660 is ideal for
filtering baseband tag signals in RFID systems.
The LTC®6603 is a dual, programmable lowpass filter for
communications receivers and transmitters in TD-SCDMA,
WCDMA, CDMA 000, UMTS and 80 .11x systems.
A DC1304A-A or ---B board has two pairs of SMA connectors
for differential inputs and two pairs of SMA connectors for
differential outputs. The differential inputs can be AC coupled
or DC coupled. On board jumpers provide control of an
LTC660 or an LTC6603. The jumper control settings are:
serial or parallel control, internal or external clock, gain and
bandwidth control and input Ac or DC coupling. An on board
multi-turn potentiometer sets the value of the RBIAS resistor
that sets the IC power supply current and clock frequency.
PCB turrets provide for board connections to an SPI master
for a serial control of IC gain and bandwidth.
LTC6602 features:
Guaranteed Phase and Gain Matching Specs
Programmable 5th Order Lowpass: 40 kHz to 900 kHz
Programmable 4th Order Highpass: 4 kHz to 90 kHz
Programmable Gain (0dB/1 dB/ 4dB/30dB)
Simple Pin Programming or SPI Interface
Input Range Extends from 0V to 5V
Low Voltage Operation: .7V to 3.6V
Shutdown and Mute Mode
4mm × 4mm QFN Package
LTC6603 features:
Guaranteed Phase and Gain Matching Specs
Programmable 9th Order Lowpass: 4 kHz to .5 MHz
Programmable Gain (0dB/6dB/1 dB/ 4dB)
Simple Pin Programming or SPI Interface
Input Range Extends from 0V to 5V
Low Voltage Operation: .7V to 3.6V
Shutdown Mode
4mm × 4mm QFN Package
The LTC6602 BLOCK DIAG
The LTC6602 BLOCK DIAGThe LTC6602 BLOCK DIAG
The LTC6602 BLOCK DIAGR
RR
RARAM
ARAMARAM
ARAM
The LTC6603 BLOCK DIA
The LTC6603 BLOCK DIAThe LTC6603 BLOCK DIA
The LTC6603 BLOCK DIAR
RR
RGARAM
GARAMGARAM
GARAM
LTC6602 PROGRAMABLE BANDPASS FILT
ER
AND LTC6603 PROGRAMA
BLE LOW
PASS FILTER
DEMO CIRCUIT DC1304
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QUICK TEST SETUP – PARALLEL CONTROL
QUICK TEST PROCEDURE
Test Procedure
1. Connect DC1304 as shown, turn on power and adjust
the RBIAS1 pot for 50MHz.
. Connect 50 ohm terminator to AIN-(J ) and sinewave
generator to AIN+ (J1).
3. Connect oscilloscope to VOUTA+ and on the oscillo-
scope display must show a 1Vp-p sinewave.
4. Connect oscilloscope to VOUTA- and on the oscillo-
scope display must show a 1Vp-p sinewave.
5. Connect 50 ohm terminator to BIN-(J ) and sinewave
generator to BIN+ (J1).
6. Connect oscilloscope to VOUTB+ and on the oscillo-
scope display must show a 1Vp-p sinewave.
7. Connect oscilloscope to VOUTB- and on the oscillo-
scope display must show a 1Vp-p sinewave.
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LTC6602 CLK AND CUTO RANGE
CLK Range, 24MHz to 90MHz
RBIAS = (4.941 10^9) / FCLK; RBIAS in k
Example: If FCLK = 50 MHz Then
RBIAS = (4.941 10^9) / (50 10^6) = 98.8 k
The Lowpass FCUTOFF = FCLK / NLP
The Highpass FCUTOFF = FCLK / NHP
NLP and NHP are the clock dividers set by the
(LPF1, LPF0) and (HPF1, HPF0) inputs respectively.
LPF1 LPF0 NLP HPF1 HPF0 NHP
0 0 600 0 0 6000
0 1 300 0 1 000
1 0 100 1 0 1000
1 1 100 1 1 Bypass
HPF
Lowpass ilter CUTO Range
NLP Range
100 40kHz – 900kHz
300 80kHz – 300kHz
600 40kHz – 150kHz
Highpass ilter CUTO Range
NHP Range
1000 4kHz – 90kHz
000 1 kHz – 45kHz
6000 4kHz – 15kHz
LTC6602 CLK AND CUTO RANGE
CLK Range, 12MHz to 80MHz
RBIAS = ( .47 10^9) / FCLK; RBIAS in k
Example: If FCLK = 50 MHz Then
RBIAS = ( .47 10^9) / (50 10^6) = 49.44k
The Lowpass FCUTOFF = FCLK / NLP
NLP clock divider set by the (LPF1, LPF0) inputs.
Lowpass ilter CUTO Range
NLP Range
3 375kHz – .5MHz
1 8 93.75kHz – 6 5kHz
51 3.44kHz – 156. 5kHz
LPF1 LPF0 NLP
0 0 51
0 1 1 8
1 0 3
1 1 3
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DC1304A-A Parts List
Item Qty Reference Part Description Manufacturer / Part #
1 4 C1,C8,C11,C15 Cap., X5R 1uF 5V 0% AVX 06033D105MAT A
C3,C Cap., X5R 4.7uF 6.3V 10% AVX 06036D475KAT1A
3 4 C4,C7,C1 ,C13 Cap., NPO 10pF 5V 5% AVX 06033A100JAT A
4 6 C5,C6,C9,C10,C14,C16 Cap., X7R 0.1uF 5V 10% AVX 06033C104KAT A
5 4 E1,E ,E3,E4 Turret, Testpoint Mill Max 501- -00-80-00-00-07-0
6 9 E5,E6,E7,E8,E9,E10,E11, Turret, Testpoint Mill Max 308- -00-80-00-00-07-0
E1 ,E13
7 6 JP1,JP ,JP3,JP4,JP5,JP6 Headers, 4 Pins mm Ctrs. Samtec TMM-10 -0 -L-D
8 9 JP7,JP8,JP9,JP10,JP11, Headers, 3 Pins mm Ctrs. Samtec TMM-103-0 -L-S
JP1 ,JP13,JP14,JP15
9 9 J1,J ,J3,J4,J5,J6,J7,J8,J9 Conn., SMA 50-Ohm Connex 13 357
10 1 R16 Res., Chip 54.9K 0.06W 1% Vishay CRCW060354K9FKEA
11 1 R17 Res., Chip 47.5K 0.06W 1% Vishay CRCW060347K5FKEA
1 8 R1,R3,R4,R6,R7,R9,R11,R1 Res., Chip 1.87K 0.06W 1% Vishay CRCW06031K87FKEA
13 4 R ,R5,R8,R10 Res., Chip 49.9 0.06W 1% Vishay CRCW060349R9FKEA
14 R13,R19 Res., Chip 5 .3 0.06W 1% Vishay CRCW06035 R3FKEA
15 1 R14 Res., Chip 909 0.06W 1% Vishay CRCW0603909RFKEA
16 R18,R15 Trimpot Vert. Mount 00K VISHAY TS63Y- 04-K-TR 50
17 R16,R17 Res., Chip 0.0K 0.06W 1% Vishay CRCW0603 0K0FKEA
18 1 U1 I.C., OpAmp LTC660 CUF
19 15 XJP1,XJP ,XJP3,XJP4,XJP5, Shunt, mm Ctrs. Samtec SN-BK-G
XJP6,XJP7,XJP8,XJP9,
XJP10,XJP11,XJP1 ,XJP13
XJP14,XJP15
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DC1304A-B Parts List
Item Qty Reference Part Description Manufacturer / Part #
1 4 C1,C8,C11,C15 Cap., X5R 1uF 5V 0% AVX 06033D105MAT A
C3,C Cap., X5R 4.7uF 6.3V 10% AVX 06036D475KAT1A
3 4 C4,C7,C1 ,C13 Cap., NPO 10pF 5V 5% AVX 06033A100JAT A
4 6 C5,C6,C9,C10,C14,C16 Cap., X7R 0.1uF 5V 10% AVX 06033C104KAT A
5 4 E1,E ,E3,E4 Turret, Testpoint Mill Max 501- -00-80-00-00-07-0
6 9 E5,E6,E7,E8,E9,E10,E11, Turret, Testpoint Mill Max 308- -00-80-00-00-07-0
E1 ,E13
7 6 JP1,JP ,JP3,JP4,JP5,JP6 Headers, 4 Pins mm Ctrs. Samtec TMM-10 -0 -L-D
8 9 JP7,JP8,JP9,JP10,JP11, Headers, 3 Pins mm Ctrs. Samtec TMM-103-0 -L-S
JP1 ,JP13,JP14,JP15
9 9 J1,J ,J3,J4,J5,J6,J7,J8,J9 Conn., SMA 50-Ohm Connex 13 357
10 R16,R17 Res., Chip 30.1K 0.06W 1% Vishay CRCW060330K1FKEA
11 8 R1,R3,R4,R6,R7,R9,R11, R1 Res., Chip 1.87K 0.06W 1% Vishay CRCW06031K87FKEA
1 4 R ,R5,R8,R10 Res., Chip 49.9 0.06W 1% Vishay CRCW06049R9FKEA
13 R13,R19 Res., Chip 5 .3 0.06W 1% Vishay CRCW06035 R3FKEA
14 1 R14 Res., Chip 909 0.06W 1% Vishay CRCW0603909RFKEA
15 R18,R15 Trimpot Vert. Mount 00K VISHAY TS63Y- 04-K-TR 50
16 1 U1 I.C., OpAmp LTC6603CUF
17 1 XJP1,XJP ,XJP3,XJP4,XJP5, Shunt, mm Ctrs. Samtec SN-BK-G
XJP6,XJP8,XJP9,
XJP10,XJP11,XJP14,XJP15
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DC1304 QUICK START Q
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