MAX4825ETP+ Maxim Integrated Products, MAX4825ETP+ Datasheet - Page 14
![IC RELAY DRIVER 8CHAN 20-TQFN](/photos/6/50/65030/20-tqfn_pkg_sml.jpg)
MAX4825ETP+
Manufacturer Part Number
MAX4825ETP+
Description
IC RELAY DRIVER 8CHAN 20-TQFN
Manufacturer
Maxim Integrated Products
Type
Relay/Lamp Driverr
Datasheet
1.MAX4823ETP.pdf
(19 pages)
Specifications of MAX4825ETP+
Input Type
Parallel
Number Of Outputs
8
On-state Resistance
2.7 Ohm
Current - Output / Channel
70mA
Current - Peak Output
150mA
Voltage - Supply
2.3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TQFN Exposed Pad
Product
Relay Drivers
Rise Time
2 us
Fall Time
2 us
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.3 V
Supply Current
160 uA
Maximum Power Dissipation
1350 mW
Maximum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
+ 85 C
Device Type
Relay
Output Current
70mA
Supply Voltage Range
2.3V To 5.5V
Driver Case Style
TQFN
No. Of Pins
20
Operating Temperature Range
-40°C To +85°C
Peak Reflow Compatible (260 C)
No
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
where N is the total number of MAX4822 devices in a
single chain, and R
n-channel MOSFET in s.
For example, if N = 10:
An n-channel MOSFET with R
required for a daisy chain of 10 MAX4822 devices.
+3.3V/+5V, 8-Channel Relay Drivers with Fast
Recovery Time and Power-Save Mode
Figure 8. Daisy-Chain Configuration
Figure 9. Daisy-Chained MAX4822s with a Capacitor Connected to PSAVE
14
SCLK
SCLK
0.47 F
DIN
______________________________________________________________________________________
CS
CS
DIN
DIN
SCLK
CS
MAX4823
DIN
SCLK
PSAVE
GND
V
V
CS
CC
CC
R
ON
MAX4822
ON
0.1 F
DOUT
PGND
OUT8
V
V
GND
OUT1
CC
CC
is the on-resistance of the
< 142
0.1 F
DOUT
PGND
OUT8
OUT1
ON
less than 142
0.47 F
SCLK
DIN
SCLK
CS
is
DIN
SCLK
MAX4823
PSAVE
CS
V
GND
V
CC
CC
MAX4822
The MAX4822–MAX4825 feature built-in inductive kick-
back protection to reduce the voltage spike on OUT_
generated by a relay’s coil inductance when the output
is suddenly switched off. An internal Zener clamp
allows the inductor current to flow back to ground. The
Zener configuration significantly reduces the recovery
time (time it takes to turn off the relay) when compared
to protection configurations with just one diode across
the coil.
V
V
GND
CC
CC
0.1 F
DOUT
OUT8
PGND
OUT1
0.1 F
DOUT
PGND
OUT8
OUT1
Inductive Kickback Protection with
0.47 F
SCLK
DIN
SCLK
CS
Fast Recovery Time
DIN
PSAVE
SCLK
CS
MAX4823
GND
MAX4822
V
V
CC
CC
V
V
GND
CC
CC
0.1 F
DOUT
OUT8
PGND
OUT1
0.1 F
DOUT
PGND
OUT8
OUT1