MAX11014BGTM+ Maxim Integrated, MAX11014BGTM+ Datasheet - Page 24

• Manufacturer Part Number: MAX11014BGTM+
• Description: Special Purpose Amplifiers Auto RF MESFET Amp Drain-Current Cntrlr
• Manufacturer: Maxim Integrated
• Series: MAX11014, MAX11015r

Specifications of MAX11014BGTM+

• Rohs: yes
• Common Mode Rejection Ratio (min): 90 dB
• Operating Supply Voltage: 0.5 V to 11 V
• Supply Current: 2.8 mA
• Maximum Power Dissipation: 2162.2 mW
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TQFN-48
• Available Set Gain: 13.98 dB

The MAX11014/MAX11015 provide an internal low-
noise +2.5V reference for the ADCs, DACs, and tem-
perature sensors. Set bits D3–D0 within the hardware
configuration register to control the source of the DAC
and ADC references. See Tables 10c and 10d.
Connect a voltage source to REFADC between +1.0V
and AV
voltage source to REFDAC between +0.7V to +2.5V in
external DAC reference mode. When using an external
voltage reference, bypass REFADC and REFDAC with
0.1µF capacitors to AGND.
The MAX11014/MAX11015 operate from separate ana-
log and digital power supplies. Set the analog supply
voltage, AV
digital supply voltage, DV
AV
AGND and DV
DGND. The analog circuitry typically consumes 2.8mA
of supply current and the digital circuitry 3.7mA.
Set the negative analog supply voltages, AV
GATEV
GATEV
ative supplies with a 0.1µF and 1µF capacitor to AGND.
The RCS_+ inputs supply the power to the input section
of the current-sense amplifiers. Set RCS_+ between
+0.5V and +11V on the MAX11014 and +5V to +32V on
the MAX11015. Bypass RCS_+ with a 0.1µF and 1µF
capacitor to AGND.
The MAX11014/MAX11015 feature a pin-selectable
I
select I
SPI mode. SDA and SCL (I
and CS (SPI mode) facilitate communication between
the MAX11014/MAX11015 and the master.
Automatic RF MESFET Amplifier
Drain-Current Controllers
24
2
C/SPI serial interface. Connect SPI/I2C to DGND to
DD
______________________________________________________________________________________
. Bypass AV
SS
SS
DD
2
C mode, or connect SPI/I2C to DV
, between -4.75V and -5.5V. Connect AV
together externally. Bypass each of these neg-
in external ADC reference mode. Connect a
DD
, between +4.75V and +5.25V. Set the
DD
DD
with a 0.1µF and 1µF capacitor to
with a 0.1µF and 1µF capacitor to
2
ADC/DAC References
DD
C mode) and DIN, SCLK,
Serial Interface
, between +2.7V and
Power Supplies
DD
to select
SS
SS
and
and
The MAX11014/MAX11015 communicate through a ser-
ial interface, compatible with SPI and MICROWIRE
devices. For SPI, ensure that the SPI bus master (typi-
cally a µC) runs in master mode so it generates the ser-
ial clock signal. Set the SCLK frequency to 20MHz or
less, and set the clock polarity (CPOL) and phase
(CPHA) in the µC control registers to the same value.
The MAX11014/MAX11015 operate with SCLK idling
high or low, and thus operate with CPOL = CPHA = 0 or
CPOL = CPHA = 1. Set CS low to latch input data at
DIN on the rising edge of SCLK. Output data at DOUT
is updated on the falling edge of SCLK. See Figure 1.
Temperature values are available in signed two’s-com-
plement format, while all others are in straight binary.
A high-to-low transition on CS initiates the 24-bit data
input cycle. Once CS is low, write an 8-bit command
byte (MSB first) at DIN to indicate which internal regis-
ter is being accessed. The command byte also identi-
fies whether the data to follow is to be written into the
serial interface or read out. See the Register
Descriptions section. After writing the command byte,
write two data bytes at DIN or read two data bytes at
DOUT. Keep CS low throughout the entire 24-bit word
write. The serial-interface circuitry is common to the
ADC and DAC sections.
When writing data, write an 8-bit command word and
16 data bits at DIN. See Figure 9. Data is input to the
serial interface on the rising edge of SCLK. When read-
ing data, write an 8-bit command byte at DIN and read
the following 16 data bits at DOUT. See Figure 10. Data
transitions at DOUT on the falling edge of SCLK. DIN
can be set high or low while data is being transferred
out at DOUT.
SPI Compatibility (SPI/ I2C = DV
DD
)