adc1210s125hn/c1 NXP Semiconductors, adc1210s125hn/c1 Datasheet - Page 17

• Manufacturer Part Number: adc1210s125hn/c1
• Description: Single 12-bit Adc; 65 Msps, 80 Msps, 105 Msps Or 125 Msps; Cmos Or Lvds Ddr Digital Outputs
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ADC1210S_SER_1
Preliminary data sheet
Fig 13. Internal reference, 2 V (p-p) full-scale
Fig 15. External reference, 1 V (p-p) to 2 V (p-p)
full-scale
V
11.3.2 Reference gain control
330 pF
SENSE
VREF
VDDA
0.1 μF
SENSE
VREF
Figure 13
required reference voltage source.
The reference gain is programmable between 0 dB to −6 dB in 1 dB steps via the SPI
(see
and 1 V (p-p), as shown in
Table 13.
INTREF[2:0]
000
001
010
011
100
101
110
111
EQUIVALENT
REFERENCE
SCHEMATIC
REFERENCE
EQUIVALENT
SCHEMATIC
Table
005aaa116
to
005aaa119
Reference SPI gain control
22). The corresponding full-scale input voltage range varies between 2 V (p-p)
Figure 16
All information provided in this document is subject to legal disclaimers.
illustrate how to connect the SENSE and VREF pins to select the
Rev. 01 — 9 April 2010
Gain (dB)
0 dB
−1 dB
−2 dB
−3 dB
−4 dB
−5 dB
−6 dB
reserved
Table
ADC1210S series; CMOS or LVDS DDR digital outputs
13:
Fig 14. Internal reference, 1 V (p-p) full-scale
Fig 16. Internal reference via SPI, 1 V (p-p) to 2 V (p-p)
full-scale
330 pF
330
pF
SENSE
SENSE
VREF
VREF
Full-scale (V (p-p))
2 V
1.78 V
1.59 V
1.42 V
1.26 V
1.12 V
1 V
x
ADC1210S series
REFERENCE
EQUIVALENT
SCHEMATIC
REFERENCE
EQUIVALENT
SCHEMATIC
005aaa117
005aaa118
© NXP B.V. 2010. All rights reserved.
17 of 36