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參數(shù)資料
| 型號： | PGA2500IDBR |
| 英文描述： | Digitally Controlled Microphone Preamplifier |
| 中文描述： | 數(shù)控麥克風(fēng)前置放大器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大小： | 197K |
| 代理商： | PGA2500IDBR |
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SBOS289A NOVEMBER 2003 REVISED DECEMBER 2003
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All parameters specified with T
A
= +25
°
C, VA+ = +5V, VA = 5V, VD = 5V, and V
COM
IN = 0V, unless otherwise noted
.
PARAMETER
TEST CONDITIONS
PGA2500
TYP
UNIT
MIN
MAX
DC Characteristics
Step Size
Gain Error
AC Characteristics
Gain = 10dB through 65dB
All Gain Settings
1
dB
dB
0.5
THD+N with f
IN
= 1kHz
Gain = 0dB, V
OUT
= 3.5V
RMS
, V
COM
IN = 0V
Gain = 30dB, V
OUT
= 3.5V
RMS
, V
COM
IN = 0V
114
108
108
102
dB
dB
Analog Input
Maximum Input Voltage
Input Resistance
Per Input Pin
Differential
Analog Output
Output Voltage Range
Output Offset Voltage
Input Referred Offset
Output Resistive Loading
Load Capacitance Stability
Short Circuit Current
Digital Characteristics
High-Level Input Voltage, V
IH
Low-Level Input Voltage, V
IL
High-Level Output Voltage, V
OH
Low-Level Output Voltage, V
OL
Input Leakage Current, I
IN
Switching Characteristics
Serial Clock (SCLK) Frequency
Serial Clock (SCLK) Pulse Width Low
Serial Clock (SCLK) Pulse Width High
Input Timing
Gain = 0dB
VA +1.5
VA+ 2.0
V
4600
9200
V
COM
IN = 0V, R
L
= 600
DC Servo On, Any Gain
DC Servo Off, Gain = 30dB
VA +0.9
VA+ 0.9
±
1
V
±
0.04
±
1
mV
pF
mA
600
100
100
10-second duration
+2.0
0.3
VA+
0.8
V
V
V
V
μ
A
I
O
= 200
μ
A
I
O
= 3.2mA
(VA+) 1.0
0.4
10
2
f
SCLK
t
PH
t
PL
0
80
80
6.25
MHz
ns
ns
SDI Setup Time
SDI Hold Time
CS Falling to SCLK Rising
SCLK Falling to CS Rising
Output Timing
CS Low to SDO Active
SCLK Falling to SDO Data Valid
CS High to SDO High Impedance
Power Supply
t
SDS
t
SDH
t
CSCR
t
CFCS
20
20
90
35
ns
ns
ns
ns
t
CSO
t
CFDO
t
CSZ
35
60
100
ns
ns
ns
Operating Voltage
VA+
VA
VD
Quiescent Current
IA+
IA
ID
+4.75
4.75
4.75
+5
5
5
+5.25
5.25
5.25
V
V
V
VA+ = +5V
VA = 5V
VD = 5V
30
30
1
40
40
2
mA
mA
mA
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