Chip with APD/SiPM read-out circuits and digital SiPM ("Voyager")
Project Members:

Vikas Vinayaka


Chip Schedule:

Submitted: 27-Aug-2018
Received: 14-Jan-2019 (estimated)

Chip Organization:

This chip, "Voyager", is designed in the AMS SiGe 0.35um BiCMOS process. This chip contains circuits to interface with APD (avalanche photodiode) and SiPM (silicon photomultiplier). This chip is an enhanced version of "Solar Sailer".
The following circuits are present on the chip:

  1. Digital SiPM
  2. VCO
  3. 4-bit Flash ADC
  4. Serial input 10-bit R-2R DAC
  5. Transimpedance amplifiers (CB and RGC)
  6. Comparators


Voyager
Figure 1: Chip layout


Chip pin names and types:

This chip contains 55 pads/pins. Pin numbers are annotated in chip layout above. Pins are grouped by circuits as below.

Digital SiPM
Pin number
Pin name
Pin type
12
dig_sipm_vref1
Analog/DC
13
dig_sipm_vref2 Analog/DC
14
dig_sipm_b4 Digital/high-speed
15
dig_sipm_b3 Digital/high-speed
16
dig_sipm_b2 Digital/high-speed
17
dig_sipm_b1 Digital/high-speed
18
dig_sipm_b0 Digital/high-speed
47
sipm_bias_hv
Analog/DC

VCO
Pin number
Pin name
Pin type
21
clk_ext_in
Digital/high-speed
22
clk_div2_out
Digital/high-speed
23
vco_vinvco
Analog/DC
24
vco_en
CMOS logic
49
vco_rlow
Analog/DC
50
vco_rrange
Analog/DC

TIA + comparators with DAC
Pin number
Pin name
Pin type
1
comp_vref_ext_select
CMOS logic
2
vref_comp_ext_in
Analog/DC
3
tia_rcg_5k_comp_in
Analog/high-speed
4
tia_rcg_5k_comp_out
Analog/high-speed
7
tia_rcg_10k_comp_out
Analog/high-speed
8
tia_cb_1k_comp_vb1
Analog/DC
9
tia_cb_1k_comp_out Analog/high-speed
10
tia_cb_2k_comp_vb1 Analog/DC
11
tia_cb_2k_comp_out Analog/high-speed
41
r2r_dac_din
CMOS logic
42
r2r_dac_clk
CMOS logic
43
r2r_dac_oen
CMOS logic
44
tia_rcg_10k_comp_in
Analog/high-speed
45
tia_cb_1k_comp_in Analog/high-speed
46
tia_cb_2k_comp_in Analog/high-speed

TIA + Flash ADC
Pin number
Pin name
Pin type
27
flash_adc_b0 Digital/high-speed
28
flash_adc_b1Digital/high-speed
29
tia_cb_1k_flash_adc_vrefp
Analog/DC
30
flash_adc_b2 Digital/high-speed
48
tia_cb_1k_flash_adc_vrefm
Analog/DC
51
tia_cb_1k_flash_adc_in
Analog/high-speed
52
flash_adc_b3
Digital/high-speed
53
tia_cb_1k_flash_adc_vb1
Analog/DC

Individual TIAs
Pin number
Pin name
Pin type
31
tia_cb_2k_out
Analog/high-speed
32
tia_cb_1k_out Analog/high-speed
33
tia_cb_1k_vb1 Analog/DC
34
tia_cb_2k_vb1 Analog/DC
37
tia_rcg_10k_in Analog/high-speed
38
tia_rcg_10k_out Analog/high-speed
39
tia_rcg_5k_in Analog/high-speed
40
tia_rcg_5k_out Analog/high-speed
54
tia_cb_1k_in Analog/high-speed
55
tia_cb_2k_in Analog/high-speed

Power
Pin number
Pin name
Pin type
6, 35
vddn
Power
19, 25
vdds
Power
5, 20, 26, 36
gnd
Ground

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