Professional Audio
High-Performance Audio Volume Controls
PGA2310, PGA2320, PGA2311, PGA4311
Get samples, datasheets, evaluation modules and app reports at:
www.ti.com/sc/device/PARTnumber
(Replace
PARTnumber
with
or
55
Digitally Controlled Microphone Preamplifier IC
PGA2500
Get samples, datasheets, evaluation modules and app reports at:
The PGA2310 is a complete stereo digitally selectable analog volume
control providing high-end audio performance. It includes a 16-bit
serial interface and a precision matched resistor attenuator. The
PGA2311 is a CMOS version with ±5-V analog power supply and is
pin-software-compatible with the PGA2310. The PGA4311 is a
4-channel version of the PGA2311.
Key Features
• Wide adjustable gain and attenuation range:
•
–95.5 dB of attenuation to +31.5 dB of gain, with 0.5-dB steps
• Noise-free level transition
• Dynamic range: 120 dB
• THD+N:
•
PGA2310/PGA2320: 0.0004% at 1 kHz
•
PGA2311U/PGA4311U (standard grade): 0.0004% at 1 kHz
•
PGA2311UA/PGA4311UA (high grade): 0.0002% at 1 kHz
• Crosstalk at 1 kHz: –126 dBFS (PGA2310); –130 dBFS (PGA2311)
• Voltage swing: 27 V
PP
(PGA2310); 7.5 V
PP
(PGA2311)
• Power supplies:
•
PGA2310/PGA2320: ±15 V analog, +5 V digital
•
PGA2311/PGA4311: ±5 V analog, +5 V digital
• Packaging: 16-pin SOL and DIP
Applications
• Mixers and control boards
• Broadcast equipment
• Musical instruments
The PGA2500 is a digitally controlled microphone preamplifier designed
for use as an analog front end for high-performance audio analog-to-
digital converters. It features low noise and wide dynamic range in
addition to a fully differential I/O architecture and four programmable
digital outputs for controlling external functions. The PGA2500 is an
ideal choice for a wide variety of microphone types.
Key Features
• 0 dB, 10 to 65 dB in 1 dB steps
• Fully differential I/O
• Dynamic performance:
•
Equivalent input noise of –128 dBu with Z
S
= 150
Ω;
Gain = 30 dB
•
THD+N of 0.0004% with Gain = 30 dB
• Includes DC servo
• Common-mode servo improves CMRR
• Serial interface
• ±5-V supply
• Packaging: 28-pin SSOP
Applications
• Professional microphones
• Broadcast studio equipment
0 dB
Z
CEN
GPO
1
GPO
2
GPO
3
GPO
4
+
–
VOUTL
Serial
Port
and
Control
Logic
CS
SCLK
SDI
SDO
OVL
V L
IN
V
COM
IN
V
IN
+
V
IN
–
Gain Range
0 dB,
+10 dB to +65 dB
1 dB per step
≈
PGA
C
S1
*
V
OUT
+
V
OUT
–
MUX
MUTE
8
8
AGNDL
AGNDR
8
8
Serial
Control
Port
ZCEN
CS
SCLK
SDI
SDO
A
GND
V
A
+
V
A
+
V
A
–
V
A
–
DC
Servo
V
D
–
DGND
≈
VIN R
MUX
C
S2
*
*
CS1 and CS2 are off-chip capacitors
–
+
VA+ VA- VD+ DGND
VOUTR
DCEN
PGA2500 block diagram.
PGA2310/PGA2320 and PGA2311/PGA4311 block diagram.
Texas Instruments 1Q 2006
Audio Solutions Guide
➔