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參數(shù)資料
| 型號(hào)： | TX810IRHHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC36 |
| 封裝： | 6 X 6 MM, 0.50 MM PITCH, GREEN, PLASTIC, VQFN-36 |
| 文件頁(yè)數(shù)： | 2/19頁(yè) |
| 文件大?。?/td> | 2713K |
| 代理商： | TX810IRHHR |
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VN
HV TX
LV RX
1 Channel
of TX810
VP
D0
D1
D2
D3
D4
D5
D6
D0
D1
D2
D3
D4
D5
D6
VB
D0~D6 is determined by
B1~B3 pins
L
RLOAD
SLLS996A – SEPTEMBER 2009 – REVISED APRIL 2010
www.ti.com
Figure 14. TX810 Block Diagram
TX810 includes four parts: Diode Bridge, bias network, clamp diodes, and logic controller. A decoder is used to
convert 3-bit logic (B1 to B3) input to 7 control signals (D0 to D6) for 7 MOSFET switches. +2.5V to +5V logic
input is level shifted internally to drive the switches. The bias current of the bridge diode is adjusted
proportionally by these switches. When all switches are on, the bias current is 7mA. Each bit difference will
adjust the bias current approximately 1mA. When all switches are off, the TX810 enters the power down mode.
Comparing to discrete T/R switches, TX810 can be shut down and turned on quickly as shown in the typical
characteristics plots. Considering the low duty cycle of ultrasound imaging, significant power saving can be
achieved.
All 6 diodes are high-voltage Schottky diodes to achieve fast recovery time. Following the bridge, a pair of
back-to-back diode limits the output voltage of TX810 to about 2Vpp. Different power/performance combination
can be selected by users. The TX810 is specified to operate at ±5V and VB is biased at 0V. The characteristics
of the T/R switch are mainly determined by bias currents. Lower power can be achieved with lower supply
voltages. Also, Table 1 shows the relationship among bias current, insertion loss, input noise, power
consumption and equivalent resistance.
Table 1. Bias current vs Performance
Test Conditions: VP = 5V, VN = -5V; VB = 0V; RLOAD = 50Ω
B3
B2
B1
I (mA)
IL (dB)
IRN (nV/rtHz)
RON (Ω)
Power (mW/CH)
0
N/A
High Impedance
0
1
-7
1.12
62
10
0
1
0
2
-5.6
1.10
45
20
0
1
3
-5
1.09
39
30
1
0
4
-4.6
1.05
35
40
1
0
1
5
-4.4
0.99
33
50
1
0
6
-4.2
0.95
31
60
1
7
-4.1
0.91
30
70
10
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s) :TX810
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| TX810IRHHT | 功能描述:模擬開(kāi)關(guān) IC 8Ch,Progr T/R Switch for Ultrasound RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:2 開(kāi)關(guān)配置:SPDT 開(kāi)啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
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| TX8111NLT | 制造商:Pulse Electronics Corporation 功能描述:IND COMMON MODE CHOKE 51UH -30% TO 50% 800MA - Tape and Reel |
| TX8136-18X18 | 制造商:TE Connectivity 功能描述: |
| TX8136-20/84PCS | 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 EXTRACTION TOOL RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產(chǎn)品類型:Dummy Receptacles 用于:97 Series Plugs |
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