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ML2003I View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
Manufacturer
ML2003I
Fairchild
Fairchild Semiconductor Fairchild
ML2003I Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
ML2003, ML2004
Logarithmic Gain/Attenuator
www.fairchildsemi.com
Features
• Low noise: 0 dBrnc max with +24dB gain
• Low harmonic distortion: -60dB max
• Gain range: –24 to +24dB
• Resolution: 0.1dB steps
• Flat frequency response:
±0.05dB from .3–4 kHz
±0.10dB from .1-20 kHz
• Low supply current 4mA max from ±5V supplies
• TTL/CMOS compatible digital interface
• ML2003 has pin selectable serial or parallel interface;
ML2004 serial interface only
General Description
The ML2003 and ML2004 are digitally controlled logarith-
mic gain/attenuators with a range of –24 to +24 dB in 0.1 dB
steps.
The gain settings are selected by a 9-bit digital word.
The ML2003 digital interface is either parallel or serial.
The ML2004 is packaged in a 14-pin DIP with a serial
interface only.
Absolute gain accuracy is 0.05dB max over supply tolerance
of ±10% and temperature range.
These CMOS logarithmic gain/attenuators are designed for a
wide variety of applications in telecom, audio, sonar, or gen-
eral purpose function generation. One specific intended
application is analog telephone lines.
Block Diagram
VCC
PDN A GND VSS GND
Pin Connections
ML2003
18-PIN DIP
VIN
+
COURSE
RESISTORS/
SWITCHES
16
+
FINE
RESISTORS/
SWITCHES
16
+
BUFFER
DECODER/MODE SELECTOR
C2
(LATI)
C1
(SID)
C0
C1
C2
F0
F2
9
9-BIT LATCH &
SHIFT REGISTER
ATTEN/
GAIN
C3 F1 F3
F2
(SCK)
NOTE: SERIAL MODE FUNCTIONS INDICATED BY PARENTHESES.
VOUT
C3
(LATI)C2
(SID)C1
(LATO)C0
PDN
F3
(SCK)F2
F1
GND
SER/PAR
C0
(LATO)
F0
(SOD)
LATI
SID
LATO
PDN
SCK
NC
GND
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
TOP VIEW
ML2004
14-PIN DIP
1
14
2
13
3
12
4
11
5
10
6
9
7
8
ATTEN/GAIN
VCC
VOUT
VSS
A GND
VIN
NC
F0 (SOD)
SER/PAR
C0 (LATO)
NC
PDN
F3
F2 (SCK)
VCC
VOUT
VSS
A GND
VIN
NC
SOD
ML2003
20-Pin PCC
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
TOP VIEW
VOUT
VSS
A GND
NC
NC
TOP VIEW
REV. 1.1.1 3/19/01
 

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