ADR435BRZ Analog Devices Inc, ADR435BRZ Datasheet - Page 20

• Manufacturer Part Number: ADR435BRZ
• Description: IC VOLT REF XFET 5.0V 8-SOIC
• Manufacturer: Analog Devices Inc
• Series: XFET®r

Specifications of ADR435BRZ

• Temperature Coefficient: 3ppm/°C
• Design Resources: Converting a Single-Ended Signal with AD7982 Differential PulSAR ADC (CN0032) Converting a Single-Ended Signal with AD7984 Differential PulSAR ADC (CN0033) Parametric Measurement Unit and Supporting Components for PAD Appls Using AD5522 and AD7685 (CN0104) Automated Calibration Technique That Reduces AD5360 Offset Voltage to Less Than 1 mV (CN0123) Integrated Device Power Supply for PAD with Output Voltage Range 0 V to 25 V (CN0130) 16 Channels of Programmable Output Span Using AD5360 (CN0131) 40 Channels of Programmable Output Span Using AD5371 (CN0149) Precision Single-Supply Differential ADC Driver for Industrial-Level Signals (CN0180)
• Reference Type: Series
• Voltage - Output: 5V
• Tolerance: ±0.04%
• Voltage - Input: 7 ~ 18 V
• Number Of Channels: 1
• Current - Quiescent: 800µA
• Current - Output: 30mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Topology: Series
• Input Voltage: 7V To 18V
• Reference Voltage: 5V
• Reference Voltage Tolerance: 2mV
• Voltage Reference Case Style: SOIC
• No. Of Pins: 8
• Fixed / Adjust / Prog: Precision
• Output Voltage (max): 5V
• Reference Voltage Accuracy (max): 0.04
• Line Regulation: 20ppm/V
• Load Regulation: 15ppm/mA
• Input Voltage (max): 20V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Cathode: -
• Lead Free Status / Rohs Status: Compliant

ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
PRECISION VOLTAGE REFERENCE FOR DATA
CONVERTERS
The ADR43x family has a number of features that make it ideal
for use with ADCs and DACs. The exceptional low noise, tight
temperature coefficient, and high accuracy characteristics make
the ADR43x ideal for low noise applications, such as cellular
base station applications.
Another example of an ADC for which the ADR431 is well
suited is the AD7701. Figure 43 shows the ADR431 used as
the precision reference for this converter. The AD7701 is a 16-bit
ADC with on-chip digital filtering intended for the measurement
of wide dynamic range and low frequency signals, such as those
representing chemical, physical, or biological processes. It contains
a charge-balancing Σ-Δ ADC, a calibration microcontroller
with on-chip static RAM, a clock oscillator, and a serial
communications port.
ANALOG
SUPPLY
CALIBRATE
GROUND
ANALOG
RANGES
ANALOG
ANALOG
+5V
SELECT
SUPPLY
INPUT
–5V
0.1µF
Figure 43. Voltage Reference for the AD7701 16-Bit ADC
0.1µF
0.1µF
10µF
ADR431
10µF
GND
V
0.1µF
V
2
4
IN
OUT
6
BP/UP
CAL
AGND
AV
V
A
AV
REF
IN
DD
SS
AD7701
CLKOUT
SDATA
SLEEP
MODE
CLKIN
DGND
DRDY
SCLK
DV
DV
SC1
SC2
CS
DD
SS
0.1µF
DATA READY
READ (TRANSMIT)
SERIAL CLOCK
SERIAL CLOCK
0.1µF
Rev. H | Page 20 of 24
PRECISION BOOSTED OUTPUT REGULATOR
A precision voltage output with boosted current capability can
be realized with the circuit shown in Figure 44. In this circuit,
U2 forces V
N1. Therefore, the load current is furnished by V
configuration, a 50 mA load is achievable at a V
heat is generated on the MOSFET, and higher current can be
achieved with a replacement of the larger device. In addition,
for a heavy capacitive load with step input, a buffer can be
added at the output to enhance the transient response.
V
IN
ADR431
GND
V
2
U1
4
IN
V
TRIM
O
OUT
Figure 44. Precision Boosted Output Regulator
to be equal to V
6
5
+
–
U2
AD8601
REF
5V
V+
V–
by regulating the turn-on of
2N7002
N1
IN
of 5 V. Moderate
IN
. In this
25Ω
R
L
V
O