Cirrus Logic CS42L42 Manual page 19

Table 3-15. Switching Specifications—HSBIAS
Test conditions (unless specified otherwise):
ground; parameters can vary with VA and VP; typical performance data taken with VL = VA = VCP = 1.8 V, VP = 3.6 V; min/max performance data taken with
VA = 1.66–1.94 V; VL = VCP = 1.8 V; VP = 3.0–5.25; I
2, 3
HS bias rise time
HS bias fall time 4
HS bias transition time 5
HS bias droop
HS bias startup-to-stable time
1.HSBIAS startup timing example
2.HSBIAS rise time is measured from 10% to 90% of the final output voltage. Transitions are specified with an HSBIAS_FILT capacitance of 4.7 µF.
3.Under the specified configuration, the HSBIAS transitions with an exponential rise time.
4.HS bias fall time is the time associated with HSBIAS falling from 95% to 5% of
the programmed typical output voltage. If transitioning to Hi-Z, the output does
not enter Hi-Z state until the internal digital counter completes, as determined
HSBIAS_RAMP
by the setting.
5.HS bias transitions between the GND mode and ON modes occur with no transition state.
DS1083F2
Fig. 2-1 shows CS42L42 connections; GNDA = GNDP = GNDCP = GNDD = 0 V; voltages are with respect to
= 500 µA (not valid for fall time); T
OUT
Parameters 1
Condition 1 6
Condition 2 7
Condition 3 8
Condition 4 8,9
10
Condition 5 Hi-Z → 2.7 V, HSBIAS_RAMP
Hi-Z → 2.3 V, HSBIAS_RAMP
Hi-Z → 2.3 V, HSBIAS_RAMP
11
3 Characteristics and Specifications
= +25°C; PDN_ALL = 0, DETECT_MODE =
A
Symbol Minimum Typical Maximum
HSBIAS_RAMP = 00 t
mb-rise
HSBIAS_RAMP = 01
HSBIAS_RAMP = 10
HSBIAS_RAMP = 11
HSBIAS_RAMP = 00 t
mb-fall
HSBIAS_RAMP = 01
HSBIAS_RAMP = 10
HSBIAS_RAMP = 11
1.8 V → Hi-Z t
mb-tran
2.0 V → Hi-Z
2.3 V → Hi-Z
2.7 V → 2.3 V t
mb-tran
1.8 V → 2.3 V
2.0 V → 2.3 V
2.0 V → 2.7 V
Hi-Z → 1.8 V t
mb-tran
Hi-Z → 2.3 V
t
mb-tran
= 01 t
mb-tran
10
=
11
=
Condition 2 7 V
mb-droop
HSBIAS_RAMP = 00 t
mb-startup
HSBIAS_RAMP = 01
HSBIAS_RAMP = 10
HSBIAS_RAMP = 11
HS_BIAS_CTRL
"0.0 V"
Setting
V
Stable
V
90%
HS_BIAS
Voltage
V
10%
GND
Output is
Weak Ground
HS_BIAS_CTRL
Setting
V
95%
HS_BIAS
Voltage
V
5%
GND
CS42L42
Normal Mode
— 0.002 —
— 10 —
— 25 —
— 50 —
— 3 —
— 15 —
— 37 —
— 75 —
— 92 —
— 92
—
— 93 —
— 23 —
— 20 —
— 18 —
— 1 —
— 96 —
— 96 —
— 10 —
— 183 —
— 198 —
— 220 —
— — 500
— 0.01 —
— 14 —
— 36 —
— 65 —
"2.7 V"
t
mb-startup
t
mb-rise
"2.75 V" "Hi-Z/0.0 V"
t
mb-fall
.
Unit
ms
ms
ms
ms
ms
ms
ms
ms
µs
µs
µs
µs
µs
µs
µs
µs
µs
ms
µs
µs
µs
mV
ms
ms
ms
ms
Hi-Z
19