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參數(shù)資料
| 型號： | TCM37C15AN |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PCM COMBO WITH PROGRAMMABLE GAIN CONTROL |
| 中文描述： | 的PCM組合，具有可編程增益控制 |
| 文件頁數(shù)： | 6/23頁 |
| 文件大小： | 351K |
| 代理商： | TCM37C15AN |
TCM37C14A, TCM37C15A
PCMCOMBO WITH PROGRAMMABLE GAIN CONTROL
SLWS018B – JUNE 1996 – REVISED MAY 1998
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (outputs not loaded) (unless otherwise noted) (continued)
gain and dynamic range, V
CC
= 5 V, V
BB
= –5 V, T
A
= 25
°
C (see Notes 4, 5, and 6) (unless otherwise noted)
PARAMETER
Signal input = 1.064 Vrms for
μ
-law,
Signal input = 1.068 Vrms for A-law
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Encoder milliwatt response (transmit gain tolerance)
±
0.04
±
0.2
dBm0
Encoder milliwatt response variation with temperature and
supplies
TA = –40
°
C – 85
°
C, supplies =
±
5%
±
0.08
dB
Digital milliwatt response (receive gain tolerance) relative to zero-
transmission level point
Signal input per CCITT G.711,
output signal = 1 kHz
±
0.04
±
0.2
dBm0
Digital milliwatt response variation with temperature and supplies
TA = –40
°
C – 85
°
C, supplies =
±
5%
±
0.08
2.76
dB
μ
-law
A-law
μ
-law
A-law
μ
-law
A-law
μ
-law
A-law
RL= 600
RL = 600
Zero transmission level point transmit channel (0 dBm0)
Zero-transmission-level point, transmit channel (0 dBm0)
2.79
dBm
RL= 900
RL = 900
1
1.03
RL= 600
RL = 600
5.76
Zero transmission level point receive channel (0 dBm0)
Zero-transmission-level point, receive channel (0 dBm0)
5.79
dBm
RL= 900
RL = 900
4
4.03
NOTES:
4. Unless otherwise noted, the analog input is a 0-dBm0, 1020-Hz sine wave, where 0 dBm0 is defined as the zero-reference point
of the channel under test with unity gain set on the amplifier. This corresponds to an analog signal input of 1.064 Vrms, or an output
of 1.503 Vrms.
5. The input amplifier is set for unity gain, noninverting. The digital input is a PCM bit stream generated by passing a 0-dBm0, 1020-Hz
sine wave through an ideal encoder.
6. Receive output is measured single ended with the output amplifier in the unity-gain configuration. All output levels are (sin x)/x
corrected.
gain tracking, reference level = –10 dBm0
PARAMETER
TEST CONDITIONS
MIN
MAX
±
0.25
±
0.5
±
1.2
±
0.25
±
0.5
±
1.2
UNIT
3 > input level
≥
–40 dBm0
–40 > input level
≥
–50dBm0
–50 > input level
≥
–55 dBm0
3 > input level
≥
–40 dBm0
–40 > input level
≥
–50 dBm0
–50 > input level
≥
–55 dBm0
Transmit gain tracking error, sinusoidal input
dB
Receive gain tracking error, sinusoidal input
dB
noise
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Transmit noise, C-message weighted
ANLGIN = AGND
1
7
dBrnC0
Transmit noise, psophometrically weighted
ANLGIN = AGND
PCMIN = 11111111 (
μ
-law),
PCMIN = 11010101 (A-law)
–82
–80
dBm0p
Receive noise, C-message-weighted quiet code at PWRO+
2
5
dBrnC0
Receive noise, psophometrically weighted
All typical values are at VBB = –5 V, VCC = 5 V, and TA = 25
°
C.
PCM = lowest positive decode level
–81
dBm0p
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