FX009ALG Consumer Microcircuits Limited, FX009ALG Datasheet

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FX009ALG

Manufacturer Part Number
FX009ALG
Description
Low-noise digitally controlled amplifier array
Manufacturer
Consumer Microcircuits Limited
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
FX009ALG
Manufacturer:
CML
Quantity:
20 000
Features/Applications
Brief Description
The FX009A Digitally Adjustable Amplifier Array is
intended to replace trimmer potentiometers and volume
controls in Cellular, PMR, Telephony and
Communications applications where d.c., voice or data
signals need adjustment.
The FX009A is a low-noise single-chip LSI consisting
eight digitally controlled amplifier stages, each with 15
distinct gain/attenuation steps. Control of each
individual amplifier is by an 8-bit serial data stream.
Seven of the amplifier stages offer a +/-3dB range in
steps of 0.43dB, whilst the remaining amplifier offers a
+/-14dB range in steps of 2dB, and is intended for
volume control applications. Each amplifier includes a
16th 'Mute' state which sets the output to bias (V
and powersaves the entire section. Minimum current
drain may be achieved by muting all eight sections.
Fig.1 Functional Block Diagram
8 Digitally Controlled Low-Noise
Amplifiers
15 Gain/Attenuation Steps
7 Trimmers, with a
0.43dB Steps
1 'Volume' Trimmer, with a
Range in 2.0dB Steps
SERIAL CLOCK INPUT
SERIAL DATA INPUT
V
V
Ch1
Ch2
Ch3
Ch4
DD
BIAS
1
2
3
4
16
V
V
V
V
1
BIAS
BIAS
BIAS
BIAS
16-LINE STEP CONTROLS TO AMPLIFIERS 1 to 8
*
*
*
*
OUTPUT MUTE - POWERSAVE
CONTROLLED AUDIO OUTPUT LINES
2
CML Semiconductor Products
PRODUCT INFORMATION
FX009A
3dB Range in
4
SERIAL DATA INPUT
LINE DECODERS
3
3
2
8 - BIT
4
AND
1
5
14dB
5
DD
6
/2)
6
7
8 - VOLUME
7
Low-Noise Digitally Controlled
Amplifier Array
*
*
*
*
1
V
V
V
V
This product replaces the need for manual trimming of
audible signals by using the host microprocessor to
digitally control the set-up of all audio levels.
Applications include:
(i) Control, adjustment and set-up of communications
equipment by an Intelligent ATE without manual
intervention – eg. Deviation, Microphone and L/S
Level, Rx Audio Level etc.
(ii) Automatic Dynamic Compensation of drift caused
by variations in temperature, linearity, etc.
(iii)Fully automated servicing and re-alignment.
The FX009A is a low-power, single 5-volt CMOS
device available in both 24-pin DIL and SMD package
versions.
BIAS
BIAS
8
BIAS
BIAS
8-Bit Serial Data Control
Output Mute/Powersave Function
Audio and Data Gain Control
Applications
Cellular, PMR, PABX Applications
5
6
8
7
LOAD/LATCH
LOAD/LATCH
Publication D/009A/3 July 1994
Ch5
Ch6
Ch7
Ch8
V
SS
FX009A

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FX009ALG Summary of contents

Page 1

CML Semiconductor Products PRODUCT INFORMATION FX009A Features/Applications 8 Digitally Controlled Low-Noise Amplifiers 15 Gain/Attenuation Steps 7 Trimmers, with a 0.43dB Steps 1 'Volume' Trimmer, with a Range in 2.0dB Steps SERIAL CLOCK INPUT SERIAL DATA INPUT ...

Page 2

Pin Number Function FX009A FX009A LG/ Serial Clock : This external clock pulse input is used to “clock in” the Control Data. See Figure 4, Data Load Timing. This input has an internal 1M pullup resistor. 2 ...

Page 3

Application Notes V SS SERIAL CLOCK INPUT LOAD/LATCH LOAD/LATCH C CHANNEL 1 INPUT 1 C CHANNEL 2 INPUT CHANNEL 3 INPUT C 4 CHANNEL 4 INPUT C CHANNEL 5 INPUT CHANNEL 6 INPUT C ...

Page 4

The gain of each amplifier block (Channel 1 to Channel 8) in the FX009A is set by a separate 8-bit data word ( bit 7 to bit 0 ). This 8-bit word, consisting of 4 Address bits (bit 7 to ...

Page 5

Specification Absolute Maximum Ratings Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is not implied. Supply voltage Input voltage at any pin (ref V = 0V) SS Sink/source current (supply pins) ...

Page 6

... Handling Precautions The FX009A is a CMOS LSI circuit which includes input protection. However precautions should be taken to prevent static discharges which may cause damage. (J4) FX009ALG 24-pin quad plastic encapsulated bent and cropped NOT TO SCALE 32.00mm 13.36mm FX009ALS 24-lead plastic leaded chip carrier ...

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