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Part: CXA1851N
Category:
Description: Up/down Converter For 900 Mhz-band Mobile Communications
Company: Sony Electronics
Datasheet: Download CXA1851N datasheet File size : 147 kB
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CXA1851N
Up/Down Converter for 900 MHz-Band Mobile Communications
For the availability of this product, please contact the sales office.
Description
The CXA1851N is an up/down converter IC for 900 MHz-band mobile communications. This is suitable for 900 MHz-band digital cordless telephone (CT2) and digital cellular. 20 pin SSOP (Plastic)
Features
· · · · · Transmission/reception converter on a single chip Operating frequency: 800 to 900 MHz Supply voltage: 2.7 to 4.5 V Power saving function 20-pin SSOP package used for set size reduction
Absolute Maximum Ratings (Ta=25°C)
· · · · Supply voltage Vcc 5 V Operating temperature Topr 20 to +75 °C Storage temperature Tstg 65 to +150 °C Allowable power dissipation PD 530 mW When mounted on a 505×0×1.6 mm copperfoiled glass epoxy board
Applications
· CT2 digital cordless telephone · Digital cellular
Structure
Bipolar silicon monolithic IC
Recommended Operating Conditions
Supply voltage Vcc 2.7 to 4.5 V
Block Diagram and Pin Configuration
LO IN (D) LO IN (U) M IX OUT2
11 10
IF OUT
LO b (D)
Vcc (D)
LO b (U)
20
19
18
17
16
15
14
13
IF b
M IX
12
OSC BUFFER AM P
IF AMP
M IX
RF AMP
1
GND
2
RF b
3
RF IN
4
PEAKING OUT
5
P/S (D)
6
P/S (U)
7
Vcc (U)
8
RF OUT
RF PRE AMP
REG
REG
LNA
GND
IF IN
9
GND
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
--1--
M IX OUT1
E93505-TE
CXA1851N
Pin Description
Pin No. 1 2 3 Typical pin voltage (V) GND 0.0 RF BYPASS 1.1 Symbol RF INPUT 0.9
REG
Equivalent circuit
Description GND pin for the down converter. MIX input by-pass pin for the down converter. R F input pin for the down converter. Because of high impedance, a 4.7 nH external chip inductor should be used for impedance matching. E m i t t e r pin for the low-noise amplifier. Connect an approximatel y 3 pF chip capacitor and an approximately 22 chip resistor in series to the GND. P o w e r saving control pin for the down converter. OFF when Vp/s1.0 V; ON when Vp/s1.8 V Power saving control pin for the up converter. OFF when Vp/s1.0 V; ON when Vp/s1.8 V Power supply for the up converter.
2
4
PEAKING OUT
0.12
3 4
REG
5
P/S (for DOWN CONV.)
0 to 4.5
5
6
P/S (for UP CONV.)
0 to 4.5
6
7
VCC (for Up CONV.) RF OUTPUT
2.7 to 4.5
REG
8
8
2.7 (Vcc=2.7V)
RF output pin for the up converter. Connect this pin to the Pin 7 power supply via the 15 nH chip inductor. GND pin for the up converter RF amplifier.
9
GND
0.0
--2--
CXA1851N
Pin No. 10 11
Symbol MIX OUT1 MIX OUT2
Typical pin voltage (V) 2.3 2.3
Equivalent circuit
10 11
Description M I X output pin for the up converter. M I X output pin for the up converter. Connect an approxim a t e l y 4.7 nH chip inductor and an approximately 3.5 pF chip capacitor between this pin and Pin 10 to form a tank circuit. G N D pin for the oscillator buffer amplifier and mixer blocks of the up converter. I F input by-pass pin for the up converter. IF input pin for the up converter. Because of high impedance, an external matching circuit is necessary which consists of a 220 nH chip inductor and an approximately 1.5 pF chip capacitor. O s c i l l a t o r input pin for the up c o n v e r t e r . A matching circuit c o n s i s t i n g of a 51 r e s i s t o r is necessary. Oscillator input by-pass pin for the up converter.
12
GND
0.0
13 14
IF BYPASS IF INPUT
1.03 1.03
14 13
REG
15
OSC INPUT (for UP CONV.) OSC BYPASS (for UP CONV.) OSC BYPASS (for DOWN CONV.) OSC BYPASS (for DOWN CONV.) Vcc (for DOWN CONV.) IF OUTPUT
1.8
16
1.8
15 16 17
17
1.85
18
Oscillator input by-pass pin for the down converter.
18
1.85
19
2.7 to 4.5
O s c i l l a t o r input pin for the down c o n v e r t e r . A matching circuit c o n s i s t i n g of a 51 r e s i s t o r is necessary. P o w e r supply for the down converter.
20
20
1.45
I F output pin for the down converter.
--3--
CXA1851N
Electrical Characteristics
(Ta=25°C, VCC=2.7V, ZL=ZS=50) Item Up Converter Block 1 Current consumption Conversion gain RF output power Noise figure Lo leak IF leak Standby current consumption Power saving control voltage Rise time Down Converter Block 3 Current consumption Conversion gain IF output power Third-order intermodulation distortion Noise figure Standby current consumption Power saving control voltage Rise time Symbol ICC CG Pout NF ISO (Lo) ISO (IF) ICC (PD) Vp/s (ON) Vp/s (OFF) Tup ICC CG Pout (IF) IM3 Conditions For no signal input Pin= - 40dBm Pin= -10dBm, 50 load DSB mode Pin= - 10dBm Pin= - 10dBm 6pin (P/S)<1.0V Min. 18.0 17.5 0 Typ. Max. Unit mA dB dBm dB dBm dBm µA V V µs
25.0 35.0 20.5 25.5 3 13 18 - 25.0 - 10 - 12.0 - 5 220 2 350 2 1.8 4.5 1.0 2.5 5.0
For no signal input 8.0 15.0 22.0 mA Pin= - 40dBm, 50 load 15.0 18.0 23.0 dB Pin= - 10dBm, 50 load - 4.5 - 2.0 dBm 49.0 dBc fRF1=866.4MHz, Pin1= - 40dBm 45 fRF2=866.8MHz, Pin2= - 40dBm NF DSB mode 7.5 10 dB ICC (PD) 5pin (P/S)1.0V 220 2 350 2 µA Vp/s (ON) 1.8 4.5 V Vp/s (OFF) 1.0 V Tup 2.5 5.0 µs
1: fIFin=150.05MHz, fRFout=864.05 to 868.05MHz fLoin=1014.10 to 1018.1MHz (- 9dBm) 2: These are the total values for the up and down converters. 3: fRFin=864.05 to 868.05MHz fLoin=1014.10 to 1018.1MHz (- 9dBm)
Typical Reference characteristics
(Ta=25°C, VCC=2.7V, ZL=ZS=50) Item Up Converter Block Third-order intermodulation distortion Down Converter Block 1 dB compression Lo leak RF leak Symbol IM3 Conditions fIF1=150.4MHz, PIF1= - 30dBm fIF2=150.8MHz, PIF2= - 30dBm Output conversion, 50 load Pin= - 40dBm Pin= - 40dBm Typ. 39.0 Unit dBc
P- 1dB ISO (Lo) ISO (RF)
- 7.0 - 29.0 - 44.0
dBm dB dB
--4--
GND
20
120p
1
IF OUT 1500p
M IX
120p RF b
19
IF AMP Vcc (D) 30p
18
2
LNA
51
120p RF IN
3
4.7N PEAKING OUT
17
LO IN (D) LO b (D) 30p LO b (U) 30p
4
22 3p OSC BUFFER AM P REG
16
5
P/S (D)
Electrical Characteristics Test Circuit 1
LO SG
LO IN (U) 30p
15
6
REG RF AMP
180p 1500p
P/S (U)
--5--
7
Vcc (U) 15n RF OUT
IF IN
14
51 120p IF b
13 M IX
1.5p 120p GND
12 220n
8
120p GND RF PRE AMP
9
4.7N M IX OUT1
10 10p 4.7N
M IX OUT2
11
IF SG CXA1851N
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