参数资料
| 型号： | OP492GS |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 4MHZ QUAD 14SOIC |
| 标准包装： | 56 |
| 放大器类型： | 通用 |
| 电路数： | 4 |
| 转换速率： | 4 V/µs |
| 增益带宽积： | 4MHz |
| 电流 - 输入偏压： | 375nA |
| 电压 - 输入偏移： | 1400µV |
| 电流 - 电源： | 1mA |
| 电流 - 输出 / 通道： | 10.5mA |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 33 V，±2.25 V ~ 16.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 管件 |
OP292/OP492
Rev. C | Page 14 of 20
TYPICAL APPLICATIONS
DIRECT ACCESS ARRANGEMENT FOR TELEPHONE
LINE INTERFACE
Figure 36 shows a 5 V single-supply transmit/receive telephone line
interface for a modem circuit. It allows full duplex transmission
of modem signals on a transformer-coupled 600 V line in a
differential manner. The transmit section gain can be set for the
specific modem device output. Similarly, the receive amplifier
gain can be appropriately selected based on the modem device
input requirements. The circuit operates on a single 5 V supply.
The standard value resistors allow the use of a SIP-packaged
resistor array; coupled with a quad op amp in a single package,
this offers a compact, low part count solution.
5V DC
6.2V
T1
1:1
TO
TELEPHONE
LINE
0.1F
50k
10F
MODEM
TX GAIN ADJUST
RX GAIN ADJUST
0.1F
300k
20k
0.1F
20k
100pF 5k
5k
1/4
OP492
1/4
OP492
1/4
OP492
5V
TRANSMIT
TXA
RECEIVE
RXA
300k
20k
50k
00
31
0-
03
6
Figure 36. Universal Direct Access Arrangement for Telephone Line Interface
SINGLE-SUPPLY INSTRUMENTATION AMPLIFIER
A low cost, single-supply instrumentation amplifier can be built
as shown in Figure 37. The circuit uses two op amps to form a
high input impedance differential amplifier. Gain can be set by
selecting resistor RG, which can be calculated using the transfer
function equation. Normally, VREF is set to 0 V. Then the output
voltage is a function of the gain times the differential input
voltage. However, the output can be offset by setting VREF from
0 V to 4 V, as long as the input common-mode voltage of the
amplifier is not exceeded.
VIN
VREF
8
VOUT
5V
7
4
1
5
VOUT = 5 +
40k
RG
+VREF
20k
5k
20k
5k
1/2
OP292
1/2
OP292
00
31
0-
03
7
Figure 37. Single-Supply Instrumentation Amplifier
In this configuration, the output can swing to near 0 V;
however, be careful because the common-mode voltage range of
the input cannot operate to 0 V. This is because of the limitation
of the circuit configuration where the first amplifier must be able to
swing below ground to attain a 0 V common-mode voltage,
which it cannot do. Depending on the gain of the instrumentation
amplifier, the input common-mode extends to within about 0.3 V
of zero. The worst-case common-mode limit for a given gain
can be easily calculated.
DAC OUTPUT AMPLIFIER
The OP292/OP492 are ideal for buffering the output of single-
supply DACs. Figure 38 shows a typical amplifier used to buffer
the output of a CMOS DAC that is connected for single-supply
operation. To do that, the normally current output 12-bit CMOS
DAC (R-2R ladder type) is connected backward to produce a
voltage output. This operating configuration necessitates a low
voltage reference. In this case, a 1.235 V low power reference is
used. The relatively high output impedance (10 kΩ) is buffered
by the OP292, and at the same time, gained up to a much more
usable level. The potentiometer provides an accurate gain trim
for a 4.095 V full-scale, allowing 1 mV increment per LSB of
control resolution.
The DAC8043 device comes in an 8-lead PDIP package, providing
a cost-effective, compact solution to a 12-bit analog channel.
VDD
Clk
Sri
1
2
3
4
8
7
6
5
DAC8043
5V
7.5k
1.235V
AD589
NC
DIGITAL
CONTROL
500k
8.45k
VOUT
20k
1/2
OP292
1mV/LSB
0V – 4.095V
FS
VREF
RFB
IOUT
GND
LD
SRI
CLK
VDD
00
31
0-
03
8
Figure 38. 12-Bit Single-Supply DAC with Serial Bus Control
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相关代理商/技术参数 |
参数描述 |
|---|---|
| OP-492GS | 制造商:AD 制造商全称:Analog Devices 功能描述:DUAL/QUAD SINGLE SUPPLY OPERATIONAL AMPLIFIER |
| OP492GS-REEL | 功能描述:IC OPAMP GP 4MHZ QUAD 14SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| OP492GS-REEL7 | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| OP492GSZ | 功能描述:IC OPAMP GP 4MHZ QUAD 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| OP492GSZ-REEL | 功能描述:IC OPAMP GP 4MHZ QUAD 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:100 系列:- 放大器类型:通用 电路数:1 输出类型:- 转换速率:0.2 V/µs 增益带宽积:- -3db带宽:- 电流 - 输入偏压:100pA 电压 - 输入偏移:30µV 电流 - 电源:380µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):±2 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:管件 |
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