ADC1415S125/DB,598 NXP Semiconductors, ADC1415S125/DB,598 Datasheet - Page 21

• Manufacturer Part Number: ADC1415S125/DB,598
• Description: BOARD DEMO FOR ADC1415S125
• Manufacturer: NXP Semiconductors
• Type: A/Dr

Specifications of ADC1415S125/DB,598

• Number Of Adc's: 1
• Number Of Bits: 14
• Sampling Rate (per Second): 125M
• Data Interface: Serial, SPI™
• Inputs Per Adc: 1 Differential
• Input Range: 1 ~ 2 Vpp
• Power (typ) @ Conditions: 840mW @ 125Msps
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: ADC1415S125
• Product: Data Conversion Development Tools
• Conversion Rate: 125 MSPS
• Resolution: 14 bit
• Interface Type: SMA
• For Use With/related Products: ADC1415S125
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-5094

NXP Semiconductors
ADC1415S_SER
Product data sheet
11.3.1 Internal/external references
11.3 System reference and power management
The ADC1415S has a stable and accurate built-in internal reference voltage to adjust the
ADC full-scale. This reference voltage can be set internally via SPI or with pins VREF and
SENSE (programmable in 1 dB steps between 0 dB and −6 dB via control bits
INTREF[2:0] when bit INTREF_EN = logic 1; see
The equivalent reference circuit is shown in
by providing a voltage on pin VREF as described in
If bit INTREF_EN is set to logic 0, the reference voltage is determined either internally or
externally as detailed in
Table 11.
[1]
Selection
internal
(Figure
internal
(Figure
external
(Figure
internal via SPI
(Figure
Fig 17. Reference equivalent schematic
The voltage on pin VREF is doubled internally to generate the internal reference voltage.
SENSE
VREF
18)
19)
20)
21)
Reference selection
All information provided in this document is subject to legal disclaimers.
SPI bit
INTREF_EN
0
0
0
1
Single 14-bit ADC; input buffer; CMOS or LVDS DDR digital outputs
BUFFER
SELECTION
Rev. 4 — 17 December 2010
LOGIC
Table
11.
SENSE pin
AGND
pin VREF connected to pin SENSE and
via a 330 pF capacitor to AGND
V
pin VREF connected to pin SENSE and
via 330 pF capacitor to AGND
REFERENCE
DDA(3V)
AMP
EXT_ref
EXT_ref
Figure
VREF pin
330 pF capacitor to AGND
external voltage between
0.5 V and 1 V
REFERENCE
BANDGAP
Table
17. External reference is also possible
Figure
ADC1415S series
21) See
20.
[1]
ADC CORE
Figure 18
REFAB/
REFBB
REFAT/
REFBT
© NXP B.V. 2010. All rights reserved.
Full-scale (p-p)
1 V
1 V to 2 V
1 V to 2 V
2 V
to
Figure
21 of 42
21.