參數(shù)資料
型號(hào)： THS4500EVM
廠商： Texas Instruments, Inc.
英文描述： THS4500 Evalutation Module(THS4500評(píng)估板)
中文描述： THS4500 Evalutation模塊（THS4500評(píng)估板）
文件頁(yè)數(shù)： 18/25頁(yè)
文件大小： 313K
代理商： THS4500EVM
Single-Ended In/Single-Ended Out, Utilizing Transformer
3-2
3.1
Single-Ended In/Single-Ended Out, Utilizing Transformer
The fully differential amp output can be monitored by a single-ended
instrument at J4. The THS4500EVM utilizes Mini-Circuits CD542 footprint
transformers to make the fully differential-to-single-ended conversion. An
ADP4
–
1WT transformer is installed on the board.
R8, R9, and R10 are chosen such that the load on the fully differential amp is
800
when combined with the load impedance transformed by the turn ratio
T1. This load is chosen because it is a common input impedance value for
ADCs, and is the impedance at which many fully differential amp parameters
were measured. The 800-
load occurs when one of two conditions is met:
R11 is installed and the measuring instrument is set to 1-M
input
impedance
or
R11 is not installed and the measuring instrument has an input impedance
of 50
.
Figure 3
–
1.Single-Ended In/Single-Ended Out, Utilizing Transformer
R7 0
R2
374
R5
392
+VS
R9
340
R6 0
J1
Vin
–
R3
402
R1
56.2
R4
392
R17
0
R10
280
J4
Vout
R11
49.9
R8
340
–
VS
–
Vocm
+
U1
THS4500
1
2
8
3
6
5
4
TP1
Vocm
C1 0
T1
ADP4
–
1WT
6
1
5
4
3
C2 0
C13
1 F
3.2
Single-Ended to Fully Differential Application
Single-supply, single-ended to fully differential conversion is a popular
application for fully differential amps. Until the introduction of fully differential
amps such as the THS4500, it was necessary to include two coupling
capacitors to prevent the input signal from violating the input common mode
range of the op amp. The THS4500 is optimized for ground-referenced inputs
in single supply applications
—
no capacitors are required.
When operated, the the output voltage is offset to +VS/2 (2.5 V) by the internal
action of V
OCM
.
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THS4500ID 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4500IDG4 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4500IDGK 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4500IDGKG4 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4500IDGKR 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
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