User's Manual

TRF7960
TRF7961
SLOU186F–AUGUST 2006–REVISED AUGUST 2010 www.ti.com
4.4 ELECTRICAL CHARACTERISTICS
over temperature range V
S
= 5 V (unless otherwise noted)
TYP
–40°C
PARAMETER CONDITIONS
MIN/
25°C TO UNIT
MAX
110°C
I
PD
Supply current in power-down mode All systems disabled, including supply-voltage regulators 1 10 μA MAX
The reference voltage generator and the VDD_X remain
I
PD2
Supply current in power-down mode 2 120 300 μA MAX
active to support external circuitry.
Oscillator running, supply-voltage regulators in
I
STBY
Supply current in standby mode 1.5 4 mA MAX
low-consumption mode
Supply current without antenna driver Oscillator, regulators, Rx and AGC, are all active. Tx is
I
ON1
10 16 mA MAX
current off.
Supply current with antenna driver Oscillator, regulators, Rx, AGC, and Tx are all active.
I
ON2
70 mA MAX
current Pout = 100 mW.
Supply current with antenna driver Oscillator, regulators, Rx, AGC, and Tx are all active.
I
ON3
120 mA MAX
current Pout = 200 mW.
1.4 MIN
BG Band Gap voltage Internal analog reference voltage 1.6 V
1.7 MAX
1.4 MIN
V
POR
Power on reset voltage (POR) 2 V
2.5 MAX
3.1 MIN
V
DD_A
Regulated supply for analog circuitry 3.5 V
3.8 MAX
4 MIN
V
DD_RF
Regulated supply for RF circuitry Regulator set for 5-V system with 250-mV difference. 4.6 V
5.2 MAX
3.1 MIN
V
DD_X
Regulated supply for external circuitry 3.4 V
3.8 MAX
The difference between the external supply and the
Rejection of external supply noise on
P
PSRR
regulated voltage is higher than 250 mV. Measured at 26 20 dB MIN
the supply VDD_RF regulator
212 kHz.
Half-power mode 8 12 Ω MAX
R
RFOUT
PA driver output resistance
Full- power mode 4 6 Ω MAX
5 MIN
R
RFIN
RX_IN1 and RX_IN2 input resistance 10 kΩ
20 MAX
V
RFIN
Maximum input voltage At RX_IN1 and RX_IN2 inputs 3.5 V
PP
MAX
f
SUB-CARRIER
= 424 kHz 1.2 2.5 mV
PP
MAX
V
SENS
Input sensitivity
f
SUB-CARRIER
= 848 kHz 1.2 3 mV
PP
MAX
t
SET_PD
Set up time after power down 10 20 ms MAX
t
SET_STBY
Set up time after standby mode 30 100 μs MAX
Recovery time after modulation
t
REC
Modulation signal: sine, 424-kHz, 10-mVpp 60 μs MAX
(ISO14443)
30 MIN
f
SYS_CLK
SYS_CLK frequency In PD2 mode EN = 0 and EN2 = 1 60 kHz
120 MAX
CLK
MAX
Maximum CLK frequency 2 MHz TYP
V
IL
Input logic low 0.2 0.2 VDD_I/O MAX
V
IH
Input logic high 0.8 VDD_I/O MIN
R
OUT
Output resistance I/O_0 to I/O_7 low_io = H for VDD_I/O < 2.7 V 400 800 Ω MAX
R
SYS_CLK
Output resistance SYS_CLK low_io = H for VDD_I/O < 2.7 V 200 400 Ω MAX
8 ELECTRICAL SPECIFICATIONS Copyright © 2006–2010, Texas Instruments Incorporated
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