U2270B Просмотр технического описания (PDF) - Atmel Corporation
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U2270B Datasheet PDF : 18 Pages
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U2270B
8. Electrical Characteristics
All voltages are referred to GND (Pins 1 and 7)
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Data output
- Collector emitter
- Saturation voltage
Iout = 5 mA
2
VCEsat
400
mV
Data output enable
- Low-level input voltage
- High-level input voltage
Data input
- Clamping level low
- Clamping level high
- Input resistance
- Input sensitivity
Driver polarity mode
- Low-level input voltage
- High-level input voltage
Carrier frequency enable
- Low-level input voltage
- High-level input voltage
Operating current
3
Vil
Vih
f = 3 kHz (square wave)
Gain capacitor = 100 nF
Vil
4
Vih
Rin
SIN
5
Vil
Vih
6
Vil
Vih
10,
5V application without load
connected to the coil driver
11, 12
and
IS
14
0.5
V
2.4
V
2
3.8
220
10
V
V
kΩ
mVpp
V
2.4
0.2
V
V
3.0
0.8
V
4.5
9
mA
Standby current
VS
- Supply voltage
- Supply voltage drift
- Output current
Driver output voltage
- One-rail operation
- Battery-voltage operation
VEXT
- Output voltage
- Supply voltage drift
- Output current
- Standby output current
Standby input
- Low-level input voltage
- High-level input voltage
Oscillator
- Carrier frequency
12V application
IL = ±100 mA
VS, VEXT, VBatt, DVS = 5V
VBatt = 12V
IC active
Standby mode
RF resistor = 110 kΩ
(“Application 2” ), REM 1(1)
12
ISt
30
70
µA
14
VS
dVs/dT
4.6
5.4
4.2
6.3
V
mV/K
IS
1.8
3.5
mA
8, 9
VDRV
VDRV
2.9
3.6
4.3
VPP
3.1
4.0
4.7
VPP
VEXT
4.6
5.4
6.3
V
10
dVEXT/dT
4.2
mV/K
IEXT
3.5
mA
IEXT
0.4
mA
13
Vil
Vih
3.1
0.8
V
V
f0
121
125
129
kHz
Low-pass filter
- Cut-off frequency
Carrier frequency = 125 kHz
fcut
7
kHz
Amplifier gain
CHP = 100 nF
30
Note: 1. REM 1: In “Application 1” where the oscillator operates in free-running mode, the IC must be soldered free from distortion.
Otherwise, the oscillator may be out of bounds.
15
4684E–RFID–02/08
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