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參數資料
| 型號： | U2794B |
| 英文描述： | 1000 MHz Quadrature Demodulator |
| 中文描述： | 1000兆赫正交解調器 |
| 文件頁數： | 4/11頁 |
| 文件大小： | 258K |
| 代理商： | U2794B |
TELEFUNKEN Semiconductors
U2794B
Rev. A3: 23.08.1995
4 (11)
Electrical Characteristics
Test conditions (unless otherwise specified); V
S
= 5 V, T
amb
= 25
°
C, referred to test circuit
System impedance Z
O
= 50 , fiLO = 950 MHz, PiLO = –10 dBm
Parameters
Test Conditions / Pins
Emitter follower
I = 0.6 mA
Note 5
Pins 1, 2, 19 and 20
Symbol
I, IX / Q,
QX
Min.
Typ.
Max.
Unit
I/O outputs
3 dB-bandwidth
w/o external C
I/Q amplitude
imbalance
I/Q quadrature error
I/Q maximum output
swing
DC output voltage
DC output offset voltage Note 6
BWI/Q
≥
30
MHz
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Symm. output R
L
> 5 k
Pins 1, 2, 19 and 20
AII/Q
QEI/Q
Max I/Q
≤ ±
0.2
≤ ±
1.5
dB
Deg
V
PP
2
VOUT
VOFSI/Q
I/IX
Q/QX
Zout
2.8
< 5
V
Pins 1, 2, 19 and 20
mV
Output impedance
Pins 1, 2, 19 and 20
see figure 6
50
Gain control, GC
Control range power
gain, gain high/gain low
Switch voltage
“Gain high”
“Gain low”
Settling time, ST
Power “OFF” – “ON”
Power “ON” – “OFF”
Pin 11
Note 7
GCR
PGH/GGL
25
23/–2
dB
Pin 11
Pin 11
GCVHigh
GCVLow
1
V
V
Note 8
STON
STOFF
< 4
< 4
s
s
Note 5: Due to test board parasitics this bandwidth is reduced and not equal for I, IX, Q, QX.
If symmetry and full bandwidth is required the lowpass Pins 3, 4 and 9, 10 should be isolated from the board.
The bandwidth of the I/Q outputs can be increased further by using a resistor between the Pins 3, 4, 9 and 10.
This resistors shunt the internal loads of RI
5.4 k The decrease in gain here has to be considered.
Note 6: Output emitter follower internal acurrent I = 0.6 mA allows only small voltage swing with a 50
For low signal distortion the load impedance should be RI
≥
5 k
Note 7: Referred to the level of the output vector I
2
Q
2
.
Note 8: The low gain status is achieved with an open or high ohmic Pin 11. A recommended application circuit for
switching between high and low gain status is shown in figure 1.
load.
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| U2794B_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:1000-MHz Quadrature Demodulator |
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| U2794B-MFS | 功能描述:IC QUADRATR DEMOD 1000MHZ 20SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 解調器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:解調器 LO 頻率:- RF 頻率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音數據:6.36dB 電流 - 電源:41.5mA 電源電壓:2.7 V 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| U2794B-MFSG3 | 功能描述:IC DEMODULATR QUAD 1K MHZ 20SOIC RoHS:是 類別:RF/IF 和 RFID >> RF 解調器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:解調器 LO 頻率:- RF 頻率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音數據:6.36dB 電流 - 電源:41.5mA 電源電壓:2.7 V 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-TQFN-EP（5x5） 包裝:帶卷 (TR) |
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